Womens health continued Flashcards

1
Q

what is cervical cancer strongly associated with

A

HPV - 16 and 18

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

how does HPV predispose someone to cancer

A

P53 and pRb are tumour suppressor genes. They have a role in suppressing cancers from developing. HPV produces two proteins (E6 and E7) that inhibit these tumour suppressor genes. The E6 protein inhibits p53, and the E7 protein inhibits pRb. Therefore, HPV promotes the development of cancer by inhibiting tumour suppressor genes.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

what are risk factors for cervical cancer

A

Increased risk of catching HPV
Later detection of precancerous and cancerous changes (non-engagement with screening)
Smoking
HIV (patients with HIV are offered yearly smear tests)
Combined contraceptive pill use for more than five years
Increased number of full-term pregnancies
Family history
Exposure to diethylstilbestrol during fetal development (this was previously used to prevent miscarriages before 1971)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

what are increased risks of catching HPV

A

Early sexual activity
Increased number of sexual partners
Sexual partners who have had more partners
Not using condoms

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

how does cervical cancer present

A

may be detected during cervical smears in otherwise asymptomatic women
abnormal vaginal bleeding
vaginal discharge
pelvic pain
dyspareunia

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

what are appearances which may suggest cervical cancer

A

Ulceration
Inflammation
Bleeding
Visible tumour

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

what are the grades of cervical intraepithelial neoplasia

A

CIN I: mild dysplasia, affecting 1/3 the thickness of the epithelial layer, likely to return to normal without treatment
CIN II: moderate dysplasia, affecting 2/3 the thickness of the epithelial layer, likely to progress to cancer if untreated
CIN III: severe dysplasia, very likely to progress to cancer if untreated

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

what are notable exceptions for the smear test

A

Women with HIV are screened annually
Women over 65 may request a smear if they have not had one since aged 50
Women with previous CIN may require additional tests (e.g. test of cure after treatment)
Certain groups of immunocompromised women may have additional screening (e.g. women on dialysis, cytotoxic drugs or undergoing an organ transplant)
Pregnant women due a routine smear should wait until 12 weeks post-partum

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

when are women called to the cervical screening programme

A

Every three years aged 25 – 49
Every five years aged 50 – 64

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

what are the different cytology results someone can get

A

Inadequate
Normal
Borderline changes
Low-grade dyskaryosis
High-grade dyskaryosis (moderate)
High-grade dyskaryosis (severe)
Possible invasive squamous cell carcinoma
Possible glandular neoplasia

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

what is the management for different smear results based on the public health england guidelines

A

Inadequate sample – repeat the smear after at least three months
HPV negative – continue routine screening
HPV positive with normal cytology – repeat the HPV test after 12 months
HPV positive with abnormal cytology – refer for colposcopy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

what is colposcopy

A

it is when a speculum is inserted and uses a colposcope to magnify the cervix which allows the epithelial lining of the cervix to be examined
stains such as acetic acid and iodine solution can be used to differentiate abnormal areas

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

what is acetic acid

A

causes abnormal cells to appear white. This appearance is described as acetowhite. This occurs in cells with an increased nuclear to cytoplasmic ratio (more nuclear material), such as cervical intraepithelial neoplasia and cervical cancer cells.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

what is schillers iodine test

A

involves using an iodine solution to stain the cells of the cervix. Iodine will stain healthy cells a brown colour. Abnormal areas will not stain.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

what is large loop excision of the transformation zone

A

it is a procedure called a loop biopsy which can be performed with local anaesthetic during colposcopy, which involves using diathermy to remove abnormal epithelial tissue of the cervix

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

what is a cone biopsy

A

it is a treatment for cervical intraepithelial neoplasia and very early stages of cervical cancer. The surgeons removes a cone shaped piece of cervix

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

what are the main risks of a cone biopsy

A

Pain
Bleeding
Infection
Scar formation with stenosis of the cervix
Increased risk of miscarriage and premature labour

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

what is the staging used for cervical cancer

A

The International Federation of Gynaecology and Obstetrics (FIGO) staging system is used to stage cervical cancer:

Stage 1: Confined to the cervix
Stage 2: Invades the uterus or upper 2/3 of the vagina
Stage 3: Invades the pelvic wall or lower 1/3 of the vagina
Stage 4: Invades the bladder, rectum or beyond the pelvis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

what is the management of cervical cancer

A

Cervical intraepithelial neoplasia and early-stage 1A: LLETZ or cone biopsy
Stage 1B – 2A: Radical hysterectomy and removal of local lymph nodes with chemotherapy and radiotherapy
Stage 2B – 4A: Chemotherapy and radiotherapy
Stage 4B: Management may involve a combination of surgery, radiotherapy, chemotherapy and palliative care

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

what is the five year survival for cervical cancer

A

The 5-year survival drops significantly with more advanced cervical cancer, from around 98% with stage 1A to around 15% with stage 4

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

what is pelvic exenteration

A

an operation that may be used in advanced cervical cancer. It involves removing most or all of the pelvic organs, including the vagina, cervix, uterus, fallopian tubes, ovaries, bladder and rectum. It is a vast operation and has significant implications on quality of life.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

what is Bevacizumab

A

monoclonal antibody that may be used in combination with other chemotherapies in the treatment of metastatic or recurrent cervical cancer. It is also used in several other types of cancer. It targets vascular endothelial growth factor A (VEGF-A), which is responsible for the development of new blood vessels.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

when is the HPV vaccine given and what does it protect you against

A

12-13 yrs before sexual activity
The current NHS vaccine is Gardasil, which protects against strains 6, 11, 16 and 18:

Strains 6 and 11 cause genital warts
Strains 16 and 18 cause cervical cancer

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

what is the most common type of endometrial cancer

A

adenocarcinoma
it is an oestrogen sensitive cancer

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
what is endometrial hyperplasia
precancerous condition involving thickening of the endometrium. The risk factors, presentation and investigations of endometrial hyperplasia are similar to endometrial cancer. Most cases of endometrial hyperplasia will return to normal over time
26
what are the two kinds of endometrial hyperplasia
hyperplasia without atypia atypical hyperplasia
27
how is endometrial hyperplasia treated
progestogens, with either: Intrauterine system (e.g. Mirena coil) Continuous oral progestogens (e.g. medroxyprogesterone or levonorgestrel)
28
what are risk factors for endometrial cancer
unopposed oestrogen Increased age Earlier onset of menstruation Late menopause Oestrogen only hormone replacement therapy No or fewer pregnancies Obesity Polycystic ovarian syndrome Tamoxifen type 2 diabetes hereditary nonpolyposis colorecta cancer/lynch syndrome
29
for endometrial protection what should women with PCOS be given
one of: The combined contraceptive pill An intrauterine system (e.g. Mirena coil) Cyclical progestogens to induce a withdrawal bleed.
30
what are protective factors against endometrial cancer
Combined contraceptive pill Mirena coil Increased pregnancies Cigarette smoking
31
how does smoking affect the risk of endometrial cancer
it reduces the risk of it as it is anti-oestrogenic Oestrogen may be metabolised differently in smokers Smokers tend to be leaner, meaning they have less adipose tissue and aromatase enzyme Smoking destroys oocytes (eggs), resulting in an earlier menopause
32
how does endometrial cancer present
postmenopausal bleeding Postcoital bleeding Intermenstrual bleeding Unusually heavy menstrual bleeding Abnormal vaginal discharge Haematuria Anaemia Raised platelet count
33
what is the referral criteria for endometrial cancer
The referral criteria for a 2-week-wait urgent cancer referral for endometrial cancer is: Postmenopausal bleeding (more than 12 months after the last menstrual period) NICE also recommends referral for a transvaginal ultrasound in women over 55 years with: Unexplained vaginal discharge Visible haematuria plus raised platelets, anaemia or elevated glucose levels
34
what investigations are done for suspected endometrial cancer
Transvaginal ultrasound for endometrial thickness (normal is less than 4mm post-menopause) Pipelle biopsy, which is highly sensitive for endometrial cancer making it useful for excluding cancer Hysteroscopy with endometrial biopsy
35
what are the stages of endometrial cancer
The International Federation of Gynaecology and Obstetrics (FIGO) staging system is used to stage endometrial cancer: Stage 1: Confined to the uterus Stage 2: Invades the cervix Stage 3: Invades the ovaries, fallopian tubes, vagina or lymph nodes Stage 4: Invades bladder, rectum or beyond the pelvis
36
how is endometrial cancer treated
The usual treatment for stage 1 and 2 endometrial cancer is a total abdominal hysterectomy with bilateral salpingo-oophorectomy, also known as a TAH and BSO other treatment options include: A radical hysterectomy involves also removing the pelvic lymph nodes, surrounding tissues and top of the vagina Radiotherapy Chemotherapy Progesterone may be used as a hormonal treatment to slow the progression of the cancer
37
what are the types of ovarian cancers
Epithelial cell tumours dermoid cysts/germ cell tumours sex cord stromal tumours metastasis
38
what is an epithelial cell ovarian tumour
Epithelial cell tumours (tumours arising from the epithelial cells of the ovary) are the most common type. Subtypes of epithelial cell tumours include: Serous tumours (the most common) Endometrioid carcinomas Clear cell tumours Mucinous tumours Undifferentiated tumours
39
what are dermoid cysts/germ cell ovarian tumours
These are benign ovarian tumours. They are teratomas, meaning they come from the germ cells. They may contain various tissue types, such as skin, teeth, hair and bone. They are particularly associated with ovarian torsion. Germ cell tumours may cause raised alpha-fetoprotein (α-FP) and human chorionic gonadotrophin (hCG).
40
what are sex cord stromal ovarian tumours
These are rare tumours, that can be benign or malignant. They arise from the stroma (connective tissue) or sex cords (embryonic structures associated with the follicles). There are several types, including Sertoli–Leydig cell tumours and granulosa cell tumours.
41
what is a Krukenberg tumour
a metastasis in the ovary, usually from a gastrointestinal tract cancer, particularly the stomach. Krukenberg tumours have characteristic “signet-ring” cells on histology, which look like signet rings on under a microscopy.
42
what are risk factors for ovarian cancer
Age (peaks age 60) BRCA1 and BRCA2 genes (consider the family history) Increased number of ovulations Obesity Smoking Recurrent use of clomifene early onset periods late menopause no pregnancies
43
what are protective factors for ovarian cancer
Having a higher number of lifetime ovulations increases the risk of ovarian cancer. Factors that stop ovulation or reduce the number of lifetime ovulations, reduce the risk: Combined contraceptive pill Breastfeeding Pregnancy
44
how do ovarian tumours present
non specific symptoms: Abdominal bloating Early satiety (feeling full after eating) Loss of appetite Pelvic pain Urinary symptoms (frequency / urgency) Weight loss Abdominal or pelvic mass Ascites ovarian mass may press on the obturator nerve and cause referred hip/groin pain
45
what is the referral criteria for ovarian cancer
Refer directly on a 2-week-wait referral if a physical examination reveals: Ascites Pelvic mass (unless clearly due to fibroids) Abdominal mass carry out further investigations before referral in women presenting with symptoms of possible cancer with a CA125: new Sx of IBS, abdo bloating, early satiety, pelvic pain, urinary frequency and weight loss
46
what investigations are done for ovarian cancer
primary care: CA125 blood test (>35IU/ml is sig) and pelvic ultrasound look at the risk of malignancy index which takes into account: menopausal status, ultrasound findings and CA125 levels imaging: CT, histology, pancreatitis
47
what do women under 40 with a complex ovarian mass require investigation wise
require tumour markers for a possible germ cell tumour - alpha fetoprotein - human chorionic gonadotropin
48
what are causes pf raised CA125
CA125 is a tumour marker for epithelial cell ovarian cancer. It is not very specific, and there are many non-malignant causes of a raised CA125: Endometriosis Fibroids Adenomyosis Pelvic infection Liver disease Pregnancy
49
what are the stages of ovarian cancer
The International Federation of Gynaecology and Obstetrics (FIGO) staging system is used to stage ovarian cancer. A very simplified version of this staging system is: Stage 1: Confined to the ovary Stage 2: Spread past the ovary but inside the pelvis Stage 3: Spread past the pelvis but inside the abdomen Stage 4: Spread outside the abdomen (distant metastasis)
50
what is the management of ovarian cancer
Ovarian cancer will be managed by a specialist gynaecology oncology MDT. It usually involves a combination of surgery and chemotherapy.
51
what is the most common type of vulval cancer
squamous cell carcinomas
52
what are risk factors for vulval cancer
Advanced age (particularly over 75 years) Immunosuppression Human papillomavirus (HPV) infection Lichen sclerosus Around 5% of women with lichen sclerosus get vulval cancer.
53
what is vulval intraepithelial neoplasia
it is a premalignant condition which affects the squamous epithelium of the skin that can precede vulval cancer
54
what is High grade squamous intraepithelial lesion
it is a type of VIN associated with HPV infection that typically occurs in younger women aged 35 – 50 years.
55
what is Differentiated VIN
alternative type of VIN associated with lichen sclerosus and typically occurs in older women (aged 50 – 60 years).
56
what are the treatment options for VIN
Watch and wait with close followup Wide local excision (surgery) to remove the lesion Imiquimod cream Laser ablation
57
how does vulval cancer present
Vulval lump Ulceration Bleeding Pain Itching Lymphadenopathy in the groin Vulval cancer most frequently affects the labia majora, giving an appearance of: Irregular mass Fungating lesion Ulceration Bleeding
58
what is the referral criteria for vulval cancer
Suspected vulval cancer should be referred on a 2-week-wait urgent cancer referral. Establishing the diagnosis and staging involves: Biopsy of the lesion Sentinel node biopsy to demonstrate lymph node spread Further imaging for staging (e.g. CT abdomen and pelvis)
59
what system is used to stage vulval cancer
The International Federation of Gynaecology and Obstetrics (FIGO) system is used to stage vulval cancer.
60
what is the management of vulval cancer
Wide local excision to remove the cancer Groin lymph node dissection Chemotherapy Radiotherapy
61
when should infertility be investigated
when a couple has been trying to conceive for 12 months without success
62
what are causes of fertility issues
Sperm problems (30%) Ovulation problems (25%) Tubal problems (15%) Uterine problems (10%) Unexplained (20%) 40% of infertile couples have a mix of male and female causes.
63
what is general advice given to people to improve fertility issues
The woman should be taking 400mcg folic acid daily Aim for a healthy BMI Avoid smoking and drinking excessive alcohol Reduce stress as this may negatively affect libido and the relationship Aim for intercourse every 2 – 3 days Avoid timing intercourse
64
what investigations are done with fertility issues
in primary care: BMI, chlamydia screen, semen analysis, female hormone testing, rubella immunity in mother in secondary care: ultrasound of pelvis, hysterosalpingogram, laparoscopy and dye test
65
what female hormones are tested when investigating fertility issues
Serum LH and FSH on day 2 to 5 of the cycle Serum progesterone on day 21 of the cycle (or 7 days before the end of the cycle if not a 28-day cycle). Anti-Mullerian hormone Thyroid function tests when symptoms are suggestive Prolactin (hyperprolactinaemia is a cause of anovulation) when symptoms of galactorrhea or amenorrhoea
66
why is anti-mullerian hormone tested
Anti-Mullerian hormone can be measured at any time during the cycle and is the most accurate marker of ovarian reserve. It is released by the granulosa cells in the follicles and falls as the eggs are depleted. A high level indicates a good ovarian reserve.
67
what is a hysterosalpingogram
type of scan used to assess the shape of the uterus and the patency of the fallopian tubes, via a small tube which is inserted into the cervix and a contrast medium is injected into the uterine cavity and fallopian tubes. If the dye doesnt fill the tubes then this will be seen on X ray and suggests obstruction tubal cannulation under Xray guidance can be performed during the procedure to open the tubed
68
what is laparoscopy and dye test
During the procedure, dye is injected into the uterus and should be seen entering the fallopian tubes and spilling out at the ends of the tubes. This will not be seen when there is tubal obstruction. During laparoscopy, the surgeon can also assess for endometriosis or pelvic adhesions and treat these.
69
what is the management options for anovulation
weight loss for overweight patients clomifene letrozole - used instead of clomifene to stimulate ovulation gonadotropins - stimulate ovulation in women resistant to clomifene ovarian drilling metformin
70
what is clomifene
anti-oestrogen (a selective oestrogen receptor modulator). It is given on days 2 to 6 of the menstrual cycle. It stops the negative feedback of oestrogen on the hypothalamus, resulting in a greater release of GnRH and subsequently FSH and LH. it is used to help stimulate ovulation
71
what is the management for tubal factors causing fertility issues
Tubal cannulation during a hysterosalpingogram Laparoscopy to remove adhesions or endometriosis In vitro fertilisation (IVF)
72
what is the management for sperm problems causing infertility
surgical sperm retrieval surgical correction of obstruction is present intra-uterine insemination intracytoplasmic sperm injection - injecting sperm directly into cytoplasm of egg donor insemination
73
what are instructions given to men providing a sample for semen analysis
Abstain from ejaculation for at least 3 days and at most 7 days Avoid hot baths, sauna and tight underwear during the lead up to providing a sample Attempt to catch the full sample Deliver the sample to the lab within 1 hour of ejaculation Keep the sample warm (e.g. in underwear) before delivery
74
what factors can affect semen analysis and sperm quality and quantity
Several lifestyle factors may affect the results of semen analysis and the quality and quantity of sperm: Hot baths Tight underwear Smoking Alcohol Raised BMI Caffeine
75
what are the normal results indicated by the WHO for semen analysis
Semen volume (more than 1.5ml) Semen pH (greater than 7.2) Concentration of sperm (more than 15 million per ml) Total number of sperm (more than 39 million per sample) Motility of sperm (more than 40% of sperm are mobile) Vitality of sperm (more than 58% of sperm are active) Percentage of normal sperm (more than 4%)
76
what is polyspermia
it is a high number of sperm in a sample - more than 250 million per ml
77
what is oligospermia
it is a reduced number of sperm in the semen sample: Mild oligospermia (10 to 15 million / ml) Moderate oligospermia (5 to 10 million / ml) Severe oligospermia (less than 5 million / ml)
78
what is cryptozoospermia
refers to very few sperm in the semen sample (less than 1 million / ml).
79
what are pre-testicular causes of abnormal semen analysis
Testosterone is necessary for sperm creation. The hypothalamo-pituitary-gonadal axis controls testosterone. Hypogonadotrophic hypogonadism (low LH and FSH resulting in low testosterone), can be due to: Pathology of the pituitary gland or hypothalamus Suppression due to stress, chronic conditions or hyperprolactinaemia Kallman syndrome
80
what are testicular causes of abnormal semen analysis
Testicular damage from: Mumps Undescended testes Trauma Radiotherapy Chemotherapy Cancer
81
what genetic/congenital disorders can affect sperm
Klinefelter syndrome Y chromosome deletions Sertoli cell-only syndrome Anorchia (absent testes)
82
what are post testicular causes of abnormal semen analysis
Obstruction preventing sperm being ejaculated can be caused by: Damage to the testicle or vas deferens from trauma, surgery or cancer Ejaculatory duct obstruction Retrograde ejaculation Scarring from epididymitis, for example, caused by chlamydia Absence of the vas deferens (may be associated with cystic fibrosis) Young’s syndrome (obstructive azoospermia, bronchiectasis and rhinosinusitis)
83
what investigations should be done if someone has an abnormal semen analysis
The initial steps for investigating abnormal semen analysis include a history, examination, repeat sample and ultrasound of the testes. Hormonal analysis with LH, FSH and testosterone levels Genetic testing Further imaging, such as transrectal ultrasound or MRI Vasography, which involves injecting contrast into the vas deferens and performing xray to assess for obstruction Testicular biopsy
84
what is the management for abnormal sperm sample
Management depends on the underlying cause, and can involve: Surgical sperm retrieval where there is obstruction Surgical correction of an obstruction in the vas deferens Intra-uterine insemination involves separating high-quality sperm, then injecting them into the uterus Intracytoplasmic sperm injection (ICSI) involves injecting sperm directly into the cytoplasm of an egg Donor insemination involves sperm from a donor
85
what is in vitro fertilisation
fertilising an egg with sperm in a lab, then injecting the resulting embryo into the uterus
86
what is the percentage success rate for IVF
Each attempt has a roughly 25 – 30% success rate at producing a live birth.
87
what are the steps in the process of IVF
Suppressing the natural menstrual cycle Ovarian stimulation Oocyte collection Insemination / intracytoplasmic sperm injection (ICSI) Embryo culture Embryo transfer
88
what are the protocols for suppressing the menstrual cycle in IVF
two protocols 1. GnRH agonists - goserelin injected in the luteal phase which stimulates the pituitary gland to secrete high FSH/LH. This causes negative feedback and the natural production of GnRH is suppressed 2. GnRH antagonist protocol: daily subcutaneous infections of GnRH antagonist starting from day 5-6 of ovarian stimulation. This suppresses LH
89
what is ovarian stimulation
it involves using medications to promote the development of multiple follicles in the ovaries - done with subcutaneous injections of FSH over 10-14 days - when enough follicle have developed to an adequate size, FSH is stopped and hCG is given to stimulate the final maturation of the follicles
90
how are oocytes collected in IVF
a needle is inserted through the vaginal wall into each ovary to aspirate the fluid from each follicle which will contain the mature oocytes - done under guidance of transvaginal ultrasound scan and under sedation (Not GA)
91
how does oocyte insemination occur in IVF
The male produces a semen sample around the time of oocyte collection. Frozen sperm from earlier samples may be used. The sperm and egg are mixed in a culture medium. Thousands of sperm need to be combined with each oocyte to produce enough enzymes (e.g. hyaluronic acid) for one sperm to penetrate the corona radiata and zona pellucida and fertilise the egg.
92
how long is the embryo cultured for in IVF
Dishes containing the fertilised eggs are left in an incubator and observed over 2 – 5 days to see which will develop and grow. They are monitored until they reach the blastocyst stage of development (around day 5).
93
when are embryos transferred into the mother in IVF
After 2 – 5 days, the highest quality embryos are selected for transfer. A catheter is inserted under ultrasound guidance through the cervix into the uterus. A single embryo is injected through the catheter into the uterus, and the catheter is removed. Generally, only a single embryo is transferred. Two embryos may be transferred in older women (i.e. over 35 years). Any remaining embryos can be frozen for future attempts at transfer.
94
when is a pregnancy test performed in IVF
around day 16
95
what is given to the woman from the time of oocyte collection until 8-10 weeks gestation in IVF
progesterone - used to mimic the progesterone released by the corpus luteum during a typical pregnancy
96
what are the complications of IVF
Failure Multiple pregnancy Ectopic pregnancy Ovarian hyperstimulation syndrome There is a small risk of complications relating to the egg collection procedure: Pain Bleeding Pelvic infection Damage to the bladder or bowel
96
what is ovarian hyperstimulation syndrome
it is a complication of ovarian stimulation during IVF infertility treatment and is associated with the use of hCG to mature the follicles during the final steps of ovarian stimulation
97
what is the pathophysiology of OHSS
an increase in VEGF released by the granulosa cells of the follicles. This increased vascular permeability causing fluid to lead from the capillaries which can move into the extravascular space and cause oedema, ascites and hypovolaemia use of LH/FSH during ovarian stimulation results in the development of multiple follicles. OHSS is provoked by the trigger injection of hCG which stimulates the release of VEGF from follicles and cause the condition
98
what are risk factors for OHSS
Younger age Lower BMI Raised anti-Müllerian hormone Higher antral follicle count Polycystic ovarian syndrome Raised oestrogen levels during ovarian stimulation
99
how can OHSS be prevented
Women are individually assessed for their risk of developing OHSS. During stimulation with gonadotrophins, they are monitored with: Serum oestrogen levels (higher levels indicate a higher risk) Ultrasound monitor of the follicles (higher number and larger size indicate a higher risk)
100
what strategies are put in place with women who are at high risk of OHSS
Use of the GnRH antagonist protocol (rather than the GnRH agonist protocol) Lower doses of gonadotrophins Lower dose of the hCG injection Alternatives to the hCG injection (i.e. a GnRH agonist or LH)
101
what are features of OHSS
Early OHSS presents within 7 days of the hCG injection. Late OHSS presents from 10 days onwards. Features of the condition include: Abdominal pain and bloating Nausea and vomiting Diarrhoea Hypotension Hypovolaemia Ascites Pleural effusions Renal failure Peritonitis from rupturing follicles releasing blood Prothrombotic state (risk of DVT and PE)
102
what are the different severities of OHSS
Mild: Abdominal pain and bloating Moderate: Nausea and vomiting with ascites seen on ultrasound Severe: Ascites, low urine output (oliguria), low serum albumin, high potassium and raised haematocrit (>45%) Critical: Tense ascites, no urine output (anuria), thromboembolism and acute respiratory distress syndrome (ARDS)
103
what is the management of OHSS
Oral fluids Monitoring of urine output Low molecular weight heparin (to prevent thromboembolism) Ascitic fluid removal (paracentesis) if required IV colloids (e.g. human albumin solution) - patients with mild to moderate are usually managed as an outpatient. Severe cases require admission and critical cases may require admission to ICU
104
what might be monitored to assess the volume of fluid in the intravascular space in OHSS
Haematocrit - when this goes up, this indicates less fluid in the intravascular space as the blood is becoming more concentrated
105
what is recurrent pregnancy loss
it is three or more consecutive miscarriages
106
what is the risk of miscarriage in different age groups
10% in women aged 20 – 30 years 15% in women aged 30 – 35 years 25% in women aged 35 – 40 years 50% in women aged 40 – 45 years
107
when are investigations initiated for recurrent miscarriage
Three or more first-trimester miscarriages One or more second-trimester miscarriages
108
what are causes of recurrent miscarriage
Idiopathic (particularly in older women) Antiphospholipid syndrome Hereditary thrombophilias Uterine abnormalities Genetic factors in parents (e.g. balanced translocations in parental chromosomes) Chronic histiocytic intervillositis Other chronic diseases such as diabetes, untreated thyroid disease and systemic lupus erythematosus (SLE)
109
what is antiphospholipid syndrome
disorder associated with antiphospholipid antibodies, where blood becomes prone to clotting. The patient is in a hyper-coagulable state. The main associations are with thrombosis and complications in pregnancy, particularly recurrent miscarriage.
110
how is the risk of miscarriage reduced in women with antiphospholipid syndrome
Low dose aspirin Low molecular weight heparin (LMWH)
111
what are the key inherited thrombophilia's to remember
Factor V Leiden (most common) Factor II (prothrombin) gene mutation Protein S deficiency
112
what uterine abnormalities can cause recurrent miscarriages
Uterine septum (a partition through the uterus) Unicornuate uterus (single-horned uterus) Bicornuate uterus (heart-shaped uterus) Didelphic uterus (double uterus) Cervical insufficiency Fibroids
113
what is chronic histiocytic intervillositis
rare cause of recurrent miscarriage, particularly in the second trimester histocytes and macrophages build up in the placenta causing inflammation and adverse outcomes
114
how is chronic histiocytic intervillositis diagnosed
placental histology showing infiltrates of mononuclear cells in the intervillous spaces
115
what investigations can be done in someone having recurrent miscarriages
Antiphospholipid antibodies Testing for hereditary thrombophilias Pelvic ultrasound Genetic testing of the products of conception from the third or future miscarriages Genetic testing on parents
116
what is the management of recurrent miscarriage
depends on underlying cause PRISM trial that suggests a benefit to using vaginal progesterone pessaries during early pregnancy for women with recurrent miscarriages presenting with bleeding
117
what is the legal requirements for an abortion
The legal framework for a termination of pregnancy is the 1967 Abortion Act. The 1990 Human Fertilisation and Embryology Act altered and expanded the criteria for an abortion, and reduced the latest gestational age where an abortion is legal from 28 weeks to 24 weeks. - two registered medical practitioners must sign to agree an abortion is indicated - must be carried out in NHS hospital or approved premise
118
what are the criteria for performing an abortion on someone
An abortion can be performed before 24 weeks if continuing the pregnancy involves greater risk to the physical or mental health of: - The woman - Existing children of the family The threshold for when the risk of continuing the pregnancy outweighs the risk of terminating the pregnancy is a matter of clinical judgement and opinion of the medical practitioners.
119
when can an abortion be performed at any time of a pregnancy
Continuing the pregnancy is likely to risk the life of the woman Terminating the pregnancy will prevent “grave permanent injury” to the physical or mental health of the woman There is “substantial risk” that the child would suffer physical or mental abnormalities making it seriously handicapped
120
what pre-abortion care is given
- abortion services can be accessed by self referral, by GP, GUM or family planning - Marie stopes UK is a remote service for women less than 10 weeks pregnant - women should be offered counselling and information to help decision making from a trained practitioner - informed consent is essential
121
what is given for a medical abortion
Mifepristone (anti-progestogen) - halts the pregnancy and relaxing the cervix misoprostol (prostaglandin analogue) 1-2 days later - softens cervix and stimulates uterine contractions rhesus negative women with a gestational age of 10 weeks or above having a medical TOP should have anti-D prophylaxis
122
what is done for a surgical abortion
cervical dilation and suction of the contents of the uterus (usually up to 14 weeks) cervical dilation and evacuation using forceps (between 14 and 24 weeks) - prior to surgical abortion medications are used for cervical priming which involves softening and dilating of the cervix: misoprostol, mifepristone or osmotic dilators - rhesus negative women having surgical TOP should have anti-D prophylaxis
123
what is done for post abortion care
women may experience vaginal bleeding and cramps for up to 2 weeks after the procedure a urine pregnancy test is performed 3 weeks after the abortion to confirm it is complete contraception is discussed and started where appropriate
124
what are complications of abortion
Bleeding Pain Infection Failure of the abortion (pregnancy continues) Damage to the cervix, uterus or other structures
125
when does nausea and vomiting peak in pregnancy
8-12 weeks
126
what is severe nausea and vomiting in pregnancy
hyperemesis gravidarum
127
what hormone is thought to be responsible for nausea and vomiting in pregnancy
hCG
128
what is the diagnosis criteria for hyperemesis gravidarum
RCOG guideline (2016) diagnoses hyperemesis are protracted nausea and vomiting in pregnancy plus: More than 5 % weight loss compared with before pregnancy Dehydration Electrolyte imbalance
129
how is the severity of hyperemesis gravidarum assessed
The severity can be assessed using the Pregnancy-Unique Quantification of Emesis (PUQE) score. This gives a score out of 15: < 7: Mild 7 – 12: Moderate > 12: Severe
130
what is the management of hyperemesis gravidarum
Antiemetics: 1. prochlorperazine (stemetil) 2. cyclizine 3. ondansetron 4. metoclopramide ranitidine and omeprazole can be used if acid reflux is a problem mild cases can be managed with oral antiemetics, moderate-severe cases may require ambulatory care or admission
131
when might someone need admission for hyperemesis gravidarum
Unable to tolerate oral antiemetics or keep down any fluids More than 5 % weight loss compared with pre-pregnancy Ketones are present in the urine on a urine dipstick (2 + ketones on the urine dipstick is significant) Other medical conditions need treating that required admission
132
what might be done in hospital for hyperemesis gravidarum
IV or IM antiemetics IV fluids (normal saline with added potassium chloride) Daily monitoring of U&Es while having IV therapy Thiamine supplementation to prevent deficiency (prevents Wernicke-Korsakoff syndrome) Thromboprophylaxis (TED stocking and low molecular weight heparin) during admission
133
what dose of folic acid should women with epilepsy be taking if pregnant
5mg daily
134
how is rheumatoid arthritis managed in pregnancy
- needs to be well controlled for at least three months before becoming pregnant - often the symptoms of RA will improve with - pregnancy and flare after delivery - treatment regime will need to be altered by a specialist: methotrexate is contraindicated, hydroxychloroquine is safe and considered first line. sulfasalazine is safe and corticosteroids may be used during flare ups
135
what is recommended for use of NSAIDs in pregnancy
tend to be avoided due to them blocking prostaglandins (important in maintaining the ductus arteriosus as well as softening cervix and stimulating contractions) unless they are really necessary - particularly avoided in third trimester
136
are beta blockers used in pregnancy
they are used most frequently in pregnancy for high blood pressure caused by pre eclampsia - labetalol is 1st line
137
what complications can beta blockers cause in pregnancy
Fetal growth restriction Hypoglycaemia in the neonate Bradycardia in the neonate
138
what is the effect of taking ACEi/ARBs in pregnancy
they can reduce the production of urine in the fetus, as well as hypocalvaria which is the incomplete formation of the skull bones. Use can also cause: Oligohydramnios (reduced amniotic fluid) Miscarriage or fetal death Renal failure in the neonate Hypotension in the neonate
139
what can use of opiates in pregnancy cause in the fetus
withdrawal symptoms in the neonate after birth. This is called neonatal abstinence syndrome (NAS). NAS presents between 3 – 72 hours after birth with irritability, tachypnoea (fast breathing), high temperatures and poor feeding.
140
is warfarin used in pregnancy
no it is considered teratogenic, it can cause: Fetal loss Congenital malformations, particularly craniofacial problems Bleeding during pregnancy, postpartum haemorrhage, fetal haemorrhage and intracranial bleeding
141
what can use of sodium valproate cause in pregnancy
neural tube defects and developmental delay.
142
is lithium used in pregnancy
it is avoided in pregnant women or those planning on getting pregnant - avoided particularly in the 1st trimester as it is linked to congenital cardiac abnormalities particularly Ebsteins anomaly
143
are SSRIs used in pregnancy
the risks need to be balanced against the benefits, as there are side effects in pregnancy: First-trimester use has a link with congenital heart defects First-trimester use of paroxetine has a stronger link with congenital malformations Third-trimester use has a link with persistent pulmonary hypertension in the neonate Neonates can experience withdrawal symptoms, usually only mild and not requiring medical management
144
what is isotretinoin and can it be used in pregnancy
it is a retinoid medication and is used to treat severe acne it is highly teratogenic and women taking it should be on very reliable contraception before, during and for one month after
145
should women be given the MMR vaccine during pregnancy
NO - pregnant women shouldnt receive live vaccines
146
what can ZVZ cause if contraced
More severe cases in the mother, such as varicella pneumonitis, hepatitis or encephalitis Fetal varicella syndrome Severe neonatal varicella infection (if infected around delivery)
147
what should be done if a women has exposure to VZV in pregnancy
When the pregnant woman has previously had chickenpox, they are safe When they are not sure about their immunity, test the VZV IgG levels. If positive, they are safe. When they are not immune, they can be treated with IV varicella immunoglobulins as prophylaxis against developing chickenpox. This should be given within ten days of exposure.
148
what should be done if a woman develops a chicken pox rash in pregnancy
oral aciclovir if they present within 24 hours and are more than 20 weeks gestation
149
what are the features of congenital varicella syndrome
Fetal growth restriction Microcephaly, hydrocephalus and learning disability Scars and significant skin changes located in specific dermatomes Limb hypoplasia (underdeveloped limbs) Cataracts and inflammation in the eye (chorioretinitis)
150
what are the risks of listeria infection in pregnancy
high rate of miscarriage or fetal death. It can also cause severe neonatal infection.
151
what are the features of congenital CMV
Fetal growth restriction Microcephaly Hearing loss Vision loss Learning disability Seizures
152
what is the classic triad of congenital toxoplasmosis
infection caused by toxoplasma gondii causes: Intracranial calcification Hydrocephalus Chorioretinitis (inflammation of the choroid and retina in the eye)
153
what are the complications of contracting parvovirus B19 in pregnancy
can lead to several complications, particularly in the first and second trimesters. Complications are: Miscarriage or fetal death Severe fetal anaemia caused by infection of the erythroid progenitor cells in the bone marrow/liver Hydrops fetalis (fetal heart failure) Maternal pre-eclampsia-like syndrome - mirror syndrome
154
what should be done in pregnant women with suspected parvovirus infection
Women suspected of parvovirus infection need tests for: IgM to parvovirus, which tests for acute infection within the past four weeks IgG to parvovirus, which tests for long term immunity to the virus after a previous infection Rubella antibodies (as a differential diagnosis)
155
what are the symptoms of congenital zika syndrome
Microcephaly Fetal growth restriction Other intracranial abnormalities, such as ventriculomegaly and cerebellar atrophy
156
what is the pathophysiology of resus incompatibility in pregnancy
When a woman that is rhesus-D negative becomes pregnant, we have to consider the possibility that her child will be rhesus positive Fetal blood will be exposed to the mothers circulation and the mother will be primed/sensitised to the rhesus D antigens usually this doesnt cause issues in the first pregnancy, however subsequent pregnancies the mothers anti D antibodies can cross the placenta. If the fetus is rhesus positive these antibodies will attack the babies red blood cells. This is called haemolytic disease of the newborn
157
what is the management of rhesus incompatibility in pregnancy
IM anti-D injections given to rhesus negative mothers which works by attaching itself to the rhesus antigens and cause them to be destroyed.
158
when are Anti-D injections given in pregnancy
Anti-D injections are given routinely on two occasions: 28 weeks gestation Birth (if the baby’s blood group is found to be rhesus-positive)
159
what points are anti-D injections also given in pregnancy beside the routine occasions
Anti-D injections should also be given at any time where sensitisation may occur, such as: Antepartum haemorrhage Amniocentesis procedures Abdominal trauma - given within 72 hours of sensitisation event
160
what is the kleihauer test
it is a check of how much fetal blood has passed into the mothers during a sensitisation event (after 20 weeks) - adding acid to a sample of mothers blood, and as fetal haemoglobin is more resistant to acid it persists in response to the added acid while maternal blood is destroyed
161
what is a small for gestational age fetus
it is measures below the 10th centile
162
what two measurements on ultrasound are used to assess fetal size
estimated fetal weight fetal abdominal circumference
163
what parameters are used to produce a customised growth chart
ethnic group weight height parity
164
what is defined as severe growth restriction
then the fetus is below the 3rd centile for their gestational age
165
what is low birth weight defined as
a birth weight of less than 2500g
166
what are the two categories for causes of small for gestational age
Constitutionally small, matching the mother and others in the family, and growing appropriately on the growth chart Fetal growth restriction (FGR), also known as intrauterine growth restriction (IUGR)
167
what is the difference between small for gestational age and fetal growth restriction
Small for gestational age simply means that the baby is small for the dates, without stating why. The fetus may be constitutionally small, growing appropriately, and not at increased risk of complications. Alternatively, the fetus may be small for gestational age due to pathology (i.e. FGR), with a higher risk of morbidity and mortality.
168
what are the two categories for causes of fetal growth restriction
Placenta mediated growth restriction Non-placenta mediated growth restriction, where the baby is small due to a genetic or structural abnormality
169
what are placenta mediated causes of growth restriction in a fetus
Idiopathic Pre-eclampsia Maternal smoking Maternal alcohol Anaemia Malnutrition Infection Maternal health conditions
170
what are non placental mediated causes for growth restriction
Genetic abnormalities Structural abnormalities Fetal infection Errors of metabolism
171
what are signs that indicate fetal growth restriction
Reduced amniotic fluid volume Abnormal Doppler studies Reduced fetal movements Abnormal CTGs
172
what are complications of fetal growth restriction
Fetal death or stillbirth Birth asphyxia Neonatal hypothermia Neonatal hypoglycaemia long term complications include: CVD (hypertension), type 2 diabetes, obesity and mood and behavioural problems
173
what are risk factors for small for gestational age
Previous SGA baby Obesity Smoking Diabetes Existing hypertension Pre-eclampsia Older mother (over 35 years) Multiple pregnancy Low pregnancy‑associated plasma protein‑A (PAPPA) Antepartum haemorrhage Antiphospholipid syndrome
174
how are small for gestational age babies monitored
there are RCOG green top guidelines which lists major and minor risk factors and these are assessed at booking clinic - low risk women have monitoring of the symphysis fundal height at every antenatal appointment for 24 weeks - if the symphysis fundal height is less than the 10th centile, women are booked for serial growth scans with umbilical artery doppler
175
when are women booked for serial growth scans with umbilical artery doppler
if they have: Three or more minor risk factors One or more major risk factors Issues with measuring the symphysis fundal height (e.g. large fibroids or BMI > 35)
176
women who are at risk of small for gestational age or have a small for gestation age baby what is measured during serial ultrasound scans
Estimated fetal weight (EFW) and abdominal circumference (AC) to determine the growth velocity Umbilical arterial pulsatility index (UA-PI) to measure flow through the umbilical artery Amniotic fluid volume
177
what are the critical steps for managing small for gestational age
Identifying those at risk of SGA Aspirin is given to those at risk of pre-eclampsia Treating modifiable risk factors (e.g. stop smoking) Serial growth scans to monitor growth Early delivery where growth is static, or there are other concerns
178
what investigations should be done if a fetus is identified as small for gestational age
Blood pressure and urine dipstick for pre-eclampsia Uterine artery doppler scanning Detailed fetal anatomy scan by fetal medicine Karyotyping for chromosomal abnormalities Testing for infections (e.g. toxoplasmosis, cytomegalovirus, syphilis and malaria)
179
when are babies defined as large for gestation age
when the weight of the newborn is more than 4.5 kg at birth or if the estimated fetal weight is above the 90th centile
180
what are causes of macrosomia (LGA)
Constitutional Maternal diabetes Previous macrosomia Maternal obesity or rapid weight gain Overdue Male baby
181
what are the risks of macrosomia (LGA)on the mother
Shoulder dystocia Failure to progress Perineal tears Instrumental delivery or caesarean Postpartum haemorrhage Uterine rupture (rare)
182
what are risks of macrosomia (LGA) to the baby
Birth injury (Erbs palsy, clavicular fracture, fetal distress and hypoxia) Neonatal hypoglycaemia Obesity in childhood and later life Type 2 diabetes in adulthood
183
what is the management of macrosomia (LGA)
ultrasounds are done to exclude polyhydramnios and estimate fetal weight OGTT for gestational diabetes reduce risks of shoulder dystocia by having delivery on a consultant lead unit with experienced midwives, access to theatre, active management of the third stage, early decision for caesarean. NICE (2008) advise against induction of labour only on the grounds of macrosomia
184
what are the types of multiple pregnancy
Monozygotic - identical twins Dizygotic - non identical twins Monoamniotic - when they share one sac Diamniotic - two separate amniotic sacs monochorionic - share a single placenta dichorionic - two separate placentas
185
what is the best outcomes for twins in terms of the amniotic sac and placenta
when there is two amniotic sacs and two placentas as each fetus will have its own nutrient supply
186
how do you determine the type of twins on an ultrasound scan
Dichorionic diamniotic twins have a membrane between the twins, with a lambda sign or twin peak sign Monochorionic diamniotic twins have a membrane between the twins, with a T sign Monochorionic monoamniotic twins have no membrane separating the twins
187
what is the lambda/twin peak sign
it refers to a triangular appearance where the membrane between the twins meets the chorion, as the chorion blends partially into the membrane. This indicates a dichorionic twin pregnancy (separate placentas).
188
what does the T sign indicate in twins
The T sign refers to where the membrane between the twins abruptly meets the chorion, giving a T appearance. This indicates a monochorionic twin pregnancy (single placenta).
189
what are risks of twins to the mother
Anaemia Polyhydramnios Hypertension Malpresentation Spontaneous preterm birth Instrumental delivery or caesarean Postpartum haemorrhage
190
what are the risk of having twins to the fetuses and neonates
Miscarriage Stillbirth Fetal growth restriction Prematurity Twin-twin transfusion syndrome Twin anaemia polycythaemia sequence Congenital abnormalities
191
what is twin twin transfusion syndrome
this is when fetuses share one placenta one fetus may receive the majority of the blood (recipient) while the other (donor) is starved of blood the recipient gets more blood and is at risk of fluid overload with heart failure and polyhydramnios the donor is at risk of growth restriction, anaemia and oligohydramnios
192
what is twin anaemia polycythaemia sequence
Twin anaemia polycythaemia sequence is similar to twin-twin transfusion syndrome, but less acute. One twin becomes anaemic whilst the other develops polycythaemia (raised haemoglobin).
193
how are twins managed antenatally
Women with multiple pregnancies require additional monitoring for anaemia, with a full blood count at: Booking clinic, 20 weeks gestation, 28 weeks gestation Additional ultrasound scans are required in multiple pregnancy to monitor for fetal growth restriction, unequal growth and twin-twin transfusion syndrome: 2 weekly scans from 16 weeks for monochorionic twins, 4 weekly scans from 20 weeks for dichorionic twins
194
when is the birth planned for twins
32 and 33 + 6 weeks for uncomplicated monochorionic monoamniotic twins 36 and 36 + 6 weeks for uncomplicated monochorionic diamniotic twins 37 and 37 + 6 weeks for uncomplicated dichorionic diamniotic twins Before 35 + 6 weeks for triplets
195
how are twins delivered
Monoamniotic twins require elective caesarean section at between 32 and 33 + 6 weeks. Diamniotic twins (aim to deliver between 37 and 37 + 6 weeks): Vaginal delivery is possible when the first baby has a cephalic presentation (head first) Caesarean section may be required for the second baby after successful birth of the first baby Elective caesarean is advised when the presenting twin is not cephalic presentation
196
what does UTI in pregnant women increase the risk of
preterm delivery low birth weight pre-eclampsia
197
what is asymptomatic bacteriuria
bacteria present in the urine, without symptoms of infection. Pregnant women with asymptomatic bacteriuria are at higher risk of developing lower urinary tract infections and pyelonephritis, and subsequently at risk of preterm birth.
198
when is asymptomatic bacteriuria tested for in pregnancy
during booking clinic and routinely throughout pregnancy
199
what are common causes of UTI
most common = E.coli Klebsiella pneumoniae (gram-negative anaerobic rod) Enterococcus Pseudomonas aeruginosa Staphylococcus saprophyticus Candida albicans (fungal)
200
what is the management of UTI in pregnancy
Urinary tract infection in pregnancy requires 7 days of antibiotics. The antibiotic options are: Nitrofurantoin (avoid in the third trimester due to risk of neonatal haemolysis) Amoxicillin (only after sensitivities are known) Cefalexin - trimethoprim must be avoided in the first trimester as it is a folate antagonist therefore can cause congenital malformations (neural tube defects)
201
when are women screened for anaemia in pregnancy
Booking clinic 28 weeks gestation
202
what are the normal ranges for haemaglobin during pregnancy
booking bloods >110g/l 28 weeks >105g/l post partum >100g/l
203
what is the management for women who have iron deficiency anaemia in pregnancy
Women with anaemia in pregnancy are started on iron replacement (e.g. ferrous sulphate 200mg three times daily). When women are not anaemic, but have a low ferritin (indicating low iron stores), they may be started on supplementary iron.
204
what is done in women with low B12 in pregnancy
increased plasma volume and B12 requirements in pregnancy can result in low B12 - women with low B12 should be tested for pernicious anaemia - if B12 is low: IM hydroxocobalamin injections or oral cyanocobalamin tablets
205
what are risk factors for developing a VTE in pregnancy
Smoking Parity ≥ 3 Age > 35 years BMI > 30 Reduced mobility Multiple pregnancy Pre-eclampsia Gross varicose veins Immobility Family history of VTE Thrombophilia IVF pregnancy
206
in women with VTE risk factors what is the management
The RCOG guidelines (2015) advise starting prophylaxis from: 28 weeks if there are three risk factors First trimester if there are four or more of these risk factors women are given low molecular weight heparin (enoxaparin, dalteparin, tinzaparin)
207
what other mechanical prophylaxis may be given in pregnancy if low molecular weight heparin is contraindicated
Intermittent pneumatic compression with equipment that inflates and deflates to massage the legs Anti-embolic compression stockings
208
what is the management of a pregnant women who has presented with VTE or PE
VTE: LMWH started immediately, before confirming the diagnosis. If it is confirmed then LMWH is continued for the remainder of pregnancy and 6 weeks postnatally or three months in total (whichever is loner) PE: Unfractionated heparin, thrombolysis, surgical embolectomy
209
what is pre-eclampsia
Pre-eclampsia refers to new high blood pressure (hypertension) in pregnancy with end-organ dysfunction, notably with proteinuria (protein in the urine). It occurs after 20 weeks gestation, when the spiral arteries of the placenta form abnormally, leading to a high vascular resistance in these vessels.
210
what is the pathophysiology of pre-eclampsia
when the process of forming the lacunae is inadequate, the woman can develop pre-eclampsia there is high vascular resistance in the spiral arteries causing poor perfusion of the placenta. this causes oxidative stress and relieve of inflammatory chemicals into the systemic circulation, leading to systemic inflammation and impaired endothelial function
211
what are high risk factors for developing pre-eclampsia
Pre-existing hypertension Previous hypertension in pregnancy Existing autoimmune conditions (e.g. systemic lupus erythematosus) Diabetes Chronic kidney disease
212
what are the moderate risk factors for developing pre-eclampsia
Older than 40 BMI > 35 More than 10 years since previous pregnancy Multiple pregnancy First pregnancy Family history of pre-eclampsia
213
how is pre-eclampsia defined
systolic over 140, diastolic over 90 plus: proteinuria, or organ dysfunction or placental dysfunction
214
what is the prophylaxis for pre-eclampsia
aspirin given from 12 weeks gestation until birth to women with: a single high risk factor two or more moderate risk factor
215
what is the medical management of pre-eclampsia
Labetolol is first-line as an antihypertensive Nifedipine (modified-release) is commonly used second-line Methyldopa is used third-line (needs to be stopped within two days of birth) Intravenous hydralazine may be used as an antihypertensive in critical care in severe pre-eclampsia or eclampsia IV magnesium sulphate is given during labour and in the 24 hours afterwards to prevent seizures Fluid restriction is used during labour in severe pre-eclampsia or eclampsia, to avoid fluid overload
216
what is the most significant immediate complication of gestational diabetes
large for dates fetus and macrosomia - shoulder distocia
217
what are risk factors for the development of gestational diabetes
The NICE guidelines (2015) list the risk factors that warrant testing for gestational diabetes: Previous gestational diabetes Previous macrosomic baby (≥ 4.5kg) BMI > 30 Ethnic origin (black Caribbean, Middle Eastern and South Asian) Family history of diabetes (first-degree relative)
218
Which mothers is the OGTT used to test for gestational diabetes
An OGTT is used in patients with risk factors for gestational diabetes, and also when there are features that suggest gestational diabetes: Large for dates fetus Polyhydramnios (increased amniotic fluid) Glucose on urine dipstick
219
when is the OGTT given in pregnancy
between weeks 24-28
220
how is the OGTT performed
An OGTT should be performed in the morning after a fast (they can drink plain water). The patient drinks a 75g glucose drink at the start of the test. The blood sugar level is measured before the sugar drink (fasting) and then at 2 hours. Normal results are: Fasting: < 5.6 mmol/l At 2 hours: < 7.8 mmol/l Results higher than these values are used to diagnose gestational diabetes.
221
what is the management of gestational diabetes
1. 4 weekly ultrasound scans to monitor fetal growth and amniotic fluid level from 28 -36 weeks 2. if the fasting is less than 7, trial of diet and exercise for 1-2 weeks, followed by metformin, then insulin 2. if fasting glucose is above 7 start insulin +/- metformin 3. same as above in fasting glucose over 6 plus macrosomia 4. glibenclamide (sulfonylurea) is used if metformin isnt tolerated and insulin is refused
222
what are the target levels for blood glucose a woman with gestational diabetes should aim for
The NICE (2015) target levels are: Fasting: 5.3 mmol/l 1 hour post-meal: 7.8 mmol/l 2 hours post-meal: 6.4 mmol/l Avoiding levels of 4 mmol/l or below
223
what dose of folic acid should women with pre-existing diabetes be given in pregnancy
5mg
224
how are women with pre-existing type 2 diabetes managed in pregnancy
with insulin and metformin, all other oral diabetic medications are stopped
225
what screening is very important to do in pregnancy with women who have pre-existing diabetes
retinopathy screening - performed after booking and at 28 weeks gestation
226
when should women with pre-existing diabetes give birth
NICE (2015) advise a planned delivery between 37 and 38 + 6 weeks for women with pre-existing diabetes - sliding scale insulin regime is considered during labour for women with T1DM (mix of dextrose and insulin)
227
what are babies of mothers with diabetes at risk of
Neonatal hypoglycaemia Polycythaemia (raised haemoglobin) Jaundice (raised bilirubin) Congenital heart disease Cardiomyopathy
228
what blood glucose level should babies be maintained at
The aim is to maintain their blood sugar above 2 mmol/l, and if it falls below this, they may need IV dextrose of nasogastric feeding.
229
what is obstetric cholestasis
it is the reduced outflow of bile acids from the liver during pregnancy thought to be due to increased oestrogen and progesterone
230
what risk is obstetric cholestasis associated with
increased risk of stillbirth
231
how does obstetric cholestasis present
later in pregnancy - third trimester itching - main symptom fatigue dark urine pale greasy stools jaundice NO RASH
232
what investigations should be done on women with suspected obstetric cholestasis
Liver function tests and bile acid checks - Abnormal LFT: AST, ALT, GGT - raised bile acids
233
what is the management of obstetric cholestasis
Emollients to soothe skin antihistamines to help sleeping Water soluble vitamin K may be considered if clotting is deranged if bile acids and LFTs are severely deranged planned delivery is considered
234
what is acute fatty liver of pregnancy
rare condition that occurs in the third trimester of pregnancy. There is a rapid accumulation of fat within the liver cells (hepatocytes), causing acute hepatitis. There is a high risk of liver failure and mortality, for both the mother and fetus.
235
what is the pathophysiology of acute fatty liver
impaired processing of atty acids in the placenta as a result of a genetic condition in the fetus which impairs fatty acid metabolism (LCHAD deficiency) this enzyme is important in fatty acid oxidation, and the unbroken fatty acids enter the mother circulation and accumulate in the liver
236
how does acute fatty liver of pregnancy present
General malaise and fatigue Nausea and vomiting Jaundice Abdominal pain Anorexia (lack of appetite) Ascites
237
what might blood show in acute fatty liver of pregnancy
Liver function tests will show elevated liver enzymes (ALT and AST). Other bloods may be deranged, with: Raised bilirubin Raised WBC count Deranged clotting (raised prothrombin time and INR) Low platelets
238
what is the management of acute fatty liver of pregnancy
obstetric emergency and requires prompt admission and delivery of the baby. Most patients will recover after delivery. Management also involves treatment of acute liver failure if it occurs, including consideration of liver transplant.
239
what is polymorphic eruption of pregnancy
it is pruritic and urticarial papules and plaques in the third trimester - usually begins on the abdomen and is associated with stretch marks it is characterised by urticarial papules, wheals (itch areas of skin) and plaques
240
how is polymorphic eruption of pregnancy managed
Topical emollients Topical steroids Oral antihistamines Oral steroids may be used in severe cases
241
what is atopic eruption of pregnancy
this is essentially eczema which flares up during pregnancy usually presents in the first and second trimester - E type: eczema type - inflamed, red, itchy skin - P type: prurigo type- intensely itchy papules typically affecting abdomen, back and limbs
242
what is the management of atopic eruption of pregnancy
Topical emollients Topical steroids Phototherapy with ultraviolet light (UVB) may be used in severe cases Oral steroids may be used in severe cases
243
what is melasma
it is increased pigmentation to patches of the skin on the face during pregnancy it is usually symmetrical, flat and affects sun exposed areas
244
what is melasma associated with
sun exposure, thyroid disease and family history.
245
what is the management of melasma
Avoiding sun exposure and using suncream Makeup (camouflage) Skin lightening cream (e.g. hydroquinone or retinoid creams), although not in pregnancy and only under specialist care Procedures such as chemical peels or laser treatment (not usually on the NHS)
246
what is pyogenic granuloma
this is also known as lobar capillary haemangioma and is a benign rapidly growing tumour of capillaries presenting as a discrete lump with a dark or red appearance. - develops over days up to 1-2 cm in size and often occur on the fingers, upper chest, back, head or neck
247
how are pyogenic granulomas managed
When they occur in pregnancy, they usually resolve without treatment after delivery. Treatment is with surgical removal with histology to confirm the diagnosis.
248
what is pemphigoid gestationis
rare autoimmune skin condition that occurs in pregnancy where autoantibodies are created which damage the connection between the dermis and epidermis causing them to separate and creating a space that can fill with fluid (large, fluid filled blisters - bullae) - typically occurs in second or third trimester as a itchy red papular or blistering rash around umbilicus which then spreads to other parts of the body
249
what are the risks to the fetus in pemphigoid gestationis
Fetal growth restriction Preterm delivery Blistering rash after delivery (as the maternal antibodies pass to the baby)
249
what is the treatment for pemphigoid gestationis
Topical emollients Topical steroids Oral steroids may be required in severe cases Immunosuppressants may be required where steroids are inadequate Antibiotics may be necessary if infection occurs
250
what is the difference between low lying placenta and placental praevia
Low-lying placenta is used when the placenta is within 20mm of the internal cervical os Placenta praevia is used only when the placenta is over the internal cervical os
251
what are the risks of placental praevia on the mother
Antepartum haemorrhage Emergency caesarean section Emergency hysterectomy Maternal anaemia and transfusions Preterm birth and low birth weight Stillbirth
252
what re the grades of placenta praevia
Minor praevia, or grade I – the placenta is in the lower uterus but not reaching the internal cervical os Marginal praevia, or grade II – the placenta is reaching, but not covering, the internal cervical os Partial praevia, or grade III – the placenta is partially covering the internal cervical os Complete praevia, or grade IV – the placenta is completely covering the internal cervical os
253
what are the risk factors for developing placenta praevia
Previous caesarean sections Previous placenta praevia Older maternal age Maternal smoking Structural uterine abnormalities (e.g. fibroids) Assisted reproduction (e.g. IVF)
254
what is the management of placental praevia
those diagnosed early (20 week scan) will require a repeat transvaginal ultrasound scan at 32 and 36 weeks corticosteroids should be given at 34 and 35+6 weeks delivery is planned between 36 and 37 weeks with a planned caesarean section
255
what is vasa praevia
a condition where the fetal vessels are within the fetal membranes (chorioamniotic membranes) and travel across the internal cervical os.
256
what are the two instances when the fetal vessels can be exposed outside the protection of the umbilical cord or placenta
Velamentous umbilical cord is where the umbilical cord inserts into the chorioamniotic membranes, and the fetal vessels travel unprotected through the membranes before joining the placenta. An accessory lobe of the placenta (also known as a succenturiate lobe) is connected by fetal vessels that travel through the chorioamniotic membranes between the placental lobes.
257
what are the two types of vasa praevia
Type I vasa praevia – the fetal vessels are exposed as a velamentous umbilical cord Type II vasa praevia – the fetal vessels are exposed as they travel to an accessory placental lobe
258
what are the risk factors for vasa praevia
Low lying placenta IVF pregnancy Multiple pregnancy
259
what is the management of vasa praevia
Corticosteroids, given from 32 weeks gestation to mature the fetal lungs Elective caesarean section, planned for 34 – 36 weeks gestation if antepartum haemorrhage occurs emergency caesarean section is required
260
what is placental abruption
when the placenta separates from the wall of the uterus during pregnancy
261
what are the risk factors for placental abruption
Previous placental abruption Pre-eclampsia Bleeding early in pregnancy Trauma (consider domestic violence) Multiple pregnancy Fetal growth restriction Multigravida Increased maternal age Smoking Cocaine or amphetamine use
262
how does placental abruption present
Sudden onset severe abdominal pain that is continuous Vaginal bleeding (antepartum haemorrhage) Shock (hypotension and tachycardia) Abnormalities on the CTG indicating fetal distress Characteristic “woody” abdomen on palpation, suggesting a large haemorrhage
263
what is the classification of a minor, major and massive antepartum haemorrhage in pregnancy
Minor haemorrhage: less than 50ml blood loss Major haemorrhage: 50 – 1000ml blood loss Massive haemorrhage: more than 1000 ml blood loss, or signs of shock
264
what is the management for placental abruption
obstetric emergency - important to consider concealed haemorrhage as well Urgent involvement of a senior obstetrician, midwife and anaesthetist 2 x grey cannula Bloods include FBC, UE, LFT and coagulation studies Crossmatch 4 units of blood Fluid and blood resuscitation as required CTG monitoring of the fetus Close monitoring of the mother steroids to mature fetal lungs + anti-D in rhesus negative women emergency caesarean
265
what is placental accreta
it is when the placental implants deeper through and past the endometrium
266
what are the three definitions of placenta accreta depending on the depth of insertion
Superficial placenta accreta is where the placenta implants in the surface of the myometrium, but not beyond Placenta increta is where the placenta attaches deeply into the myometrium Placenta percreta is where the placenta invades past the myometrium and perimetrium, potentially reaching other organs such as the bladder
267
what are risk factors for placenta accreta
Previous placenta accreta Previous endometrial curettage procedures (e.g. for miscarriage or abortion) Previous caesarean section Multigravida Increased maternal age Low-lying placenta or placenta praevia
268
how does placental accreta present
It can present with bleeding (antepartum haemorrhage) in the third trimester It may be diagnosed on antenatal ultrasound scans It may be diagnosed at birth, when it becomes difficult to deliver the placenta. It is a cause of significant postpartum haemorrhage.
269
how is placenta accreta managed
MDT approach - additional management at birth due to risk of bleeding: complex uterine surgery, blood transfusions, intensive care for the mother, neonatal intensive care delivery is planned between 35-36+6 weeks steroids are given to mature fetal lungs options during surgery are: hysterectomy, uterus preserving surgery, expectant management
270
what are the types of breech presentation
1. Complete breech, where the legs are fully flexed at the hips and knees 2. Incomplete breech, with one leg flexed at the hip and extended at the knee 3. Extended breech, also known as frank breech, with both legs flexed at the hip and extended at the knee 4. Footling breech, with a foot is presenting through the cervix with the leg extended
271
what is the management of breech babies
those breech before 36 weeks often turn spontaneously External cephalic version can be used at 37 weeks to attempt to turn the baby if ECV fails women can do a vaginal delivery (safer for mother), or elective caesarean section (safer for baby)
272
how does external cephalic version work
this is a technique used to attempt to turn a fetus it is about 50% successful - women are given tocolysis to relax the uterus before the procedure (terbutaline) - it is done after 36 weeks for nulliparous women and after 37 weeks for women who have given birth previously - Rhesus negative women require anti-D prophylaxis and a kleihauer test is used to quantify exposure of the mother to fetal blood
273
what are causes of stillbirth
Unexplained (around 50%) Pre-eclampsia Placental abruption Vasa praevia Cord prolapse or wrapped around the fetal neck Obstetric cholestasis Diabetes Thyroid disease Infections, such as rubella, parvovirus and listeria Genetic abnormalities or congenital malformations
274
what factors increase the risk of stillbirth
Fetal growth restriction Smoking Alcohol Increased maternal age Maternal obesity Twins Sleeping on the back (as opposed to either side) having risk factors for small for gestational age
275
what are three key symptoms of stillbirth that should always be asked during pregnancy
Reduced fetal movements Abdominal pain Vaginal bleeding
276
how is stillbirth diagnosed and managed
ultrasound scan - vaginal birth is first line for most women after IUFD, with either induction or expectant management Dopamine agonists can be used to suppress lactation after stillbirth
277
what testing can be carried out after stillbirth to determine cause
Genetic testing of the fetus and placenta Postmortem examination of the fetus (including xrays) Testing for maternal and fetal infection Testing the mother for conditions associated with stillbirth, such as diabetes, thyroid disease and thrombophilia
278
what are the reversible causes of adult cardiac arrest
4Ts and 4Hs: Thrombosis (i.e. PE or MI) Tension pneumothorax Toxins Tamponade (cardiac) Hypoxia Hypovolaemia Hypothermia Hyperkalaemia, hypoglycaemia, and other metabolic abnormalities - also add eclampsia and intracranial haemorrhage
279
what are the three major causes of cardiac arrest in pregnancy
Obstetric haemorrhage Pulmonary embolism Sepsis leading to metabolic acidosis and septic shock
280
what is aortocaval compression
after 20 weeks gestation the uterus is a significant size, when a woman lies on her back the mass of the uterus can compress the inferior vena cava and aorta reducing blood returning to the heart - reduces CO and causes hypotension this can be enough to lead to loss of CO and cause cardiac arrest
281
how is resuscitation done in pregnancy
A 15 degree tilt to the left side for CPR, to relieve compression of the inferior vena cava and aorta Early intubation to protect the airway Early supplementary oxygen Aggressive fluid resuscitation (caution in pre-eclampsia) Delivery of the baby after 4 minutes, and within 5 minutes of starting CPR
282
what prophylaxis can be done for preterm labour
vaginal progesterone (prevents the cervix remodelling in preparation for deliver) - offered between 16-24 weeks cervical cerclage - offered between 16-24 weeks who had previous premature birth or cervical trauma
283
if there is doubt is membranes have ruptured what tests can be performed
Insulin-like growth factor-binding protein-1 (IGFBP-1) is a protein present in high concentrations in amniotic fluid, which can be tested on vaginal fluid if there is doubt about rupture of membranes Placental alpha-microglobin-1 (PAMG-1) is a similar alternative to IGFBP-1
284
what is fetal fibronectin
alternative test to vaginal ultrasound. Fetal fibronectin is the “glue” between the chorion and the uterus, and is found in the vagina during labour. A result of less than 50 ng/ml is considered negative, and indicates that preterm labour is unlikely.
285
what are options which can be used to improve the outcome of preterm labour
Fetal monitoring (CTG or intermittent auscultation) Tocolysis with nifedipine: nifedipine is a calcium channel blocker that suppresses labour Maternal corticosteroids: can be offered before 35 weeks gestation to reduce neonatal morbidity and mortality IV magnesium sulphate: can be given before 34 weeks gestation and helps protect the baby’s brain Delayed cord clamping or cord milking: can increase the circulating blood volume and haemoglobin in the baby at birth
286
what situations would it be beneficial to induce labour early
Prelabour rupture of membranes Fetal growth restriction Pre-eclampsia Obstetric cholestasis Existing diabetes Intrauterine fetal death
287
what is the bishop score
The Bishop score is a scoring system used to determine whether to induce labour. Five things are assessed and given a score based on different criteria (minimum score is 0 and maximum is 13): Fetal station (scored 0 – 3) Cervical position (scored 0 – 2) Cervical dilatation (scored 0 – 3) Cervical effacement (scored 0 – 3) Cervical consistency (scored 0 – 2)
288
what are the options for induction of labour
membrane sweep - at 40 weeks to initiate labour vaginal prostaglandin E2 - pessary/gel/tablet cervical ripening balloon - used when prostaglandins arent preferred artificial rupture of membranes - only when there are reasons not to use prostaglandins oral mifepristone plus misoprostol - where intrauterine fetal death has occurred
289
what are the two means of monitoring during labour
Cardiotocography (CTG) to assess the fetal heart rate and uterine contractions before and during induction of labour Bishop score before and during induction of labour to monitor the progress
290
what is uterine hyperstimulation
it is the main complication of induction of labour with vaginal prostaglandins - where the contraction of the uterus is prolonged and frequent causing fetal distress and compromise - lasting longer than 2 minutes - more than 5 uterine contractions every 10 minutes
291
what is the management of uterine rupture
Removing the vaginal prostaglandins, or stopping the oxytocin infusion Tocolysis with terbutaline caesarean and surgery to repair uterus
292
what two factors are measured to get the CTG readout
One above the fetal heart to monitor the fetal heartbeat One near the fundus of the uterus to monitor the uterine contractions
293
what are indications for continuous CTG monitoring
Sepsis Maternal tachycardia (> 120) Significant meconium Pre-eclampsia (particularly blood pressure > 160 / 110) Fresh antepartum haemorrhage Delay in labour Use of oxytocin Disproportionate maternal pain
294
what are the 5 key features to look at on a CTG
1. Contractions – the number of uterine contractions per 10 minutes 2. Baseline rate – the baseline fetal heart rate 3. Variability – how the fetal heart rate varies up and down around the baseline 4. Accelerations – periods where the fetal heart rate spikes 5. Decelerations – periods where the fetal heart rate drops
295
what are reassuring, non reassuring and abnormal baseline rates and variability on CTG
1. Reassuring - 110-160 variability 5-25 2. non reassuring - 100-109 or 161-180 variability less than 5 for 30-50 minutes or more than 25 for 15-25 minutes 3. abnormal - below 100, over 180, variability less than 5 for over 50 minutes or more than 25 for over 25 minutes
296
what are the four types of decelerations on CTG
Early decelerations Late decelerations Variable decelerations Prolonged decelerations
297
what are early decelerations
gradual dips and recoveries in heart rate that correspond with uterine contractions. The lowest point of the declaration corresponds to the peak of the contraction. Early decelerations are normal and not considered pathological
298
what are late decelerations
gradual falls in heart rate that starts after the uterine contraction has already begun. There is a delay between the uterine contraction and the deceleration. The lowest point of the declaration occurs after the peak of the contraction. Late decelerations are caused by hypoxia in the fetus
299
what are variable decelerations
abrupt decelerations that may be unrelated to uterine contractions. There is a fall of more than 15 bpm from the baseline. The lowest point of the declaration occurs within 30 seconds, and the deceleration lasts less than 2 minutes in total. Variable decelerations often indicate intermittent compression of the umbilical cord, causing fetal hypoxia
300
what are prolonged decelerations
Prolonged decelerations last between 2 and 10 minutes with a drop of more than 15 bpm from baseline. This often indicates compression of the umbilical cord, causing fetal hypoxia. These are abnormal and concerning.
301
what is fetal scalp stimulation
done at times of decelerations, an acceleration in response to stimulation is a reassuring sign
302
what is the rule of 3's for fetal bradycardia
3 minutes – call for help 6 minutes – move to theatre 9 minutes – prepare for delivery 12 minutes – deliver the baby (by 15 minutes)
303
what is a sinusoidal CTG
rare pattern to be aware of, as it can indicate severe fetal compromise. It gives a pattern similar to a sine wave, with smooth regular waves up and down that have an amplitude of 5 – 15 bpm. It is usually associated with severe fetal anaemia, for example, caused by vasa praevia with fetal haemorrhage.
304
what is the mnemonic used to assess the features of a CTG in a structured way
DR C BRaVADO DR – Define Risk (define the risk based on the individual woman and pregnancy before assessing the CTG) C – Contractions BRa – Baseline Rate V – Variability A – Accelerations D – Decelerations O – Overall impression (given an overall impression of the CTG and clinical picture)
305
what is oxytocin infusion in labour used for
Induce labour Progress labour Improve the frequency and strength of uterine contractions Prevent or treat postpartum haemorrhage
306
when is ergometrine used in labour
it is used to stimulate smooth muscle contraction, and may be used during the third stage of labour - has severe side effects as it acts on smooth muscle in blood vessels and GI tract, should be avoided in eclampsia - used as syntometrine which is a combination of oxytocin and ergometrine
307
when are prostaglandins used in pregnancy
This is used for induction of labour, and can come in one of three forms: Vaginal pessaries (Propess) Vaginal tablets (Prostin tablets) Vaginal gel (Prostin gel)
308
when is nifedipine used in pregnancy
Calcium channel blocker It has two main uses in pregnancy: Reduce blood pressure in hypertension and pre-eclampsia Tocolysis in premature labour, where it suppresses uterine activity and delays the onset of labour
309
when is terbutaline used in pregnancy
Beta 2 agonist It is used for tocolysis in uterine hyperstimulation, notably when the uterine contractions become excessive during induction of labour. also used to perform ECV
310
when is carboprost used in labour
Carboprost is a synthetic prostaglandin analogue, meaning it binds to prostaglandin receptors. It stimulates uterine contraction. It is given as a deep intramuscular injection in postpartum haemorrhage, where ergometrine and oxytocin have been inadequate - avoid in asthma patients
311
when is tranexamic acid used in patients
Tranexamic acid is used in the prevention and treatment of postpartum haemorrhage. - antifibrinolytic medication
312
when is delay in the first stage of labour considered
when there is either: Less than 2cm of cervical dilatation in 4 hours Slowing of progress in a multiparous women
313
what is a partogram and what does it measure
used for monitoring a womans progress in the first stage of labour, monitors: cervical dilation descent of fetal head maternal pulse, BP, temp and urine output fetal heart rate contraction frequency status of membranes, presence of liquor and whether its stained with blood/meconium drugs and fluids which have been given
314
when is delay in the second stage of labour considered
when the active second stage (pushing) lasts over: 2 hours in a nulliparous woman 1 hour in a multiparous woman
315
what are the different lies a baby can be in
Longitudinal lie – the fetus is straight up and down Transverse lie – the fetus is straight side to side Oblique lie – the fetus is at an angle
316
what is delay of the third stage of labour defined as
More than 30 minutes with active management More than 60 minutes with physiological management
317
what pain medication is used in pregnancy
1. Simple analgesia: paracetamol 2. Gas and Air (Entonox) 3. IM Pethidine or Diamorphine (opioid injections) 4. Patient controlled analgesia - remifentanil 5. Epidural - into the epidural space outside the dura mater. options are levobupivacaine or bupivacaine mixed with fentanyl
318
what are adverse effects of an epidural
Headache after insertion Hypotension Motor weakness in the legs Nerve damage Prolonged second stage Increased probability of instrumental delivery
319
what is umbilical cord prolapse
this is when the umbilical cord descends below the presenting part of the fetus and through the cervix into the vagina after ROM
320
what is the most significant risk factors for umbilical cord prolapse
when the fetus is in an abnormal lie after 37 weeks gestation (i.e. unstable, transverse or oblique)
321
what is the management of umbilical cord prolapse
emergency caesarean section - when the baby is compressing a prolapsed cord the presenting part can be pushed up to prevent compression - women can lie in left lateral position or knee chest position - tocolytic medication can be used to minimise contractions while wating for caesarean
322
what are the risks of instrumental delivery
key risks to mum are Postpartum haemorrhage Episiotomy Perineal tears Injury to the anal sphincter Incontinence of the bladder or bowel Nerve injury (obturator or femoral nerve) The key risks to remember to the baby are: Cephalohaematoma with ventouse Facial nerve palsy with forceps subgaleal haemorrhage intracranial haemorrhage skull fracture spinal cord injury
323
what is the main complication of a ventouse delivery for baby
cephalohaematoma
324
what is the main complication of forceps delivery for baby
facial nerve palsy
325
what are indications for instrumental delivery
Failure to progress Fetal distress Maternal exhaustion Control of the head in various fetal positions
326
what nerve injury can occur in the mother during instrumental delivery
The affected nerves may be: Femoral nerve Obturator nerve
327
what nerve injuries can occur during birth that are unrelated to instrumental delivery
Lateral cutaneous nerve of the thigh Lumbosacral plexus Common peroneal nerve
328
what circumstances are perineal tears common
First births (nulliparity) Large babies (over 4kg) Shoulder dystocia Asian ethnicity Occipito-posterior position Instrumental deliveries
329
what is the classification of perineal tears
First-degree – injury limited to the frenulum of the labia minora (where they meet posteriorly) and superficial skin Second-degree – including the perineal muscles, but not affecting the anal sphincter Third-degree – including the anal sphincter, but not affecting the rectal mucosa Fourth-degree – including the rectal mucosa
330
what are the third degree subcategories for perineal tears
3A – less than 50% of the external anal sphincter affected 3B – more than 50% of the external anal sphincter affected 3C – external and internal anal sphincter affected
331
what is the management of perineal tears
first degree usually done require sutures anything larger than first degree usually requires sutures third or fourth degree is likely to require repairing in theatre to prevent complications: broad spectrum Abx, laxatives, physio, follow up
332
what are short term complications after perineal tear repair
Pain Infection Bleeding Wound dehiscence or wound breakdown
333
what are lasting complications that can come from perineal tears
Urinary incontinence Anal incontinence and altered bowel habit (third and fourth-degree tears) Fistula between the vagina and bowel (rare) Sexual dysfunction and dyspareunia (painful sex) Psychological and mental health consequences
334
what is perineal massage
Perineal massage is a method for reducing the risk of perineal tears. It involves massaging the skin and tissues between the vagina and anus (perineum). This is done in a structured way from 34 weeks onwards to stretch and prepare the tissues for delivery.
335
what are the two classifications of post partum haemorrhage
Minor PPH – under 1000ml blood loss Major PPH – over 1000ml blood loss OR Primary PPH: bleeding within 24 hours of birth Secondary PPH: from 24 hours to 12 weeks after birth
336
what are the two sub-classifications of major PPH
Moderate PPH – 1000 – 2000ml blood loss Severe PPH – over 2000ml blood loss
337
what is the immediate management if someone has a post partum haemorrhage
Resuscitation with an ABCDE approach Lie the woman flat, keep her warm and communicate with her and the partner Insert two large-bore cannulas Bloods for FBC, U&E and clotting screen Group and cross match 4 units Warmed IV fluid and blood resuscitation as required Oxygen (regardless of saturations) Fresh frozen plasma is used where there are clotting abnormalities or after 4 units of blood transfusion
338
what are the mechanical treatment options for stopping bleeding in PPH
Rubbing the uterus through the abdomen to stimulates a uterine contraction (referred to as “rubbing up the fundus”) Catheterisation (bladder distention prevents uterus contractions)
339
what are the medical treatments to stop bleeding in a PPH
Oxytocin (slow injection followed by continuous infusion) Ergometrine (intravenous or intramuscular) stimulates smooth muscle contraction (contraindicated in hypertension) Carboprost (intramuscular) is a prostaglandin analogue and stimulates uterine contraction (caution in asthma) Misoprostol (sublingual) is also a prostaglandin analogue and stimulates uterine contraction Tranexamic acid (intravenous) is an antifibrinolytic that reduces bleeding
340
what are the surgical treatments to stopping bleeding in a PPH
Intrauterine balloon tamponade – inserting an inflatable balloon into the uterus to press against the bleeding B-Lynch suture – putting a suture around the uterus to compress it Uterine artery ligation – ligation of one or more of the arteries supplying the uterus to reduce the blood flow Hysterectomy is the “last resort” but will stop the bleeding and may save the woman’s life
341
what are risk factors for PPH
Previous PPH Multiple pregnancy Obesity Large baby Failure to progress in the second stage of labour Prolonged third stage Pre-eclampsia Placenta accreta Retained placenta Instrumental delivery General anaesthesia Episiotomy or perineal tear
342
what are indications for elective caesarean
Previous caesarean Symptomatic after a previous significant perineal tear Placenta praevia Vasa praevia Breech presentation Multiple pregnancy Uncontrolled HIV infection Cervical cancer
343
what are the 4 types of emergency caesarean
Category 1: There is an immediate threat to the life of the mother or baby. Decision to delivery time is 30 minutes. Category 2: There is not an imminent threat to life, but caesarean is required urgently due to compromise of the mother or baby. Decision to delivery time is 75 minutes. Category 3: Delivery is required, but mother and baby are stable. Category 4: This is an elective caesarean, as described above.
344
what are the layers of the abdomen that need to be dissected through in a caesarean
Skin Subcutaneous tissue Fascia / rectus sheath (the aponeurosis of the transversus abdominis and external and internal oblique muscles) Rectus abdominis muscles (separated vertically) Peritoneum Vesicouterine peritoneum (and bladder) – the bladder is separated from the uterus with a bladder flap Uterus (perimetrium, myometrium and endometrium) Amniotic sac
345
what are the two kinds of incision used in a caesarean section
Pfannenstiel incision is a curved incision two fingers width above the pubic symphysis Joel-cohen incision is a straight incision that is slightly higher (this is the recommended incision)
346
what measures can be done to reduce risks during a caesarean section
H2 receptor antagonists (e.g. ranitidine) or proton pump inhibitors (e.g. omeprazole) before the procedure Prophylactic antibiotics during the procedure to reduce the risk of infection Oxytocin during the procedure to reduce the risk of postpartum haemorrhage Venous thromboembolism (VTE) prophylaxis with low molecular weight heparin
347
can a woman give birth vaginally after a caesarean
it is possible provided the cause of the caesarean is unlikely to reoccur - contraindications is previous uterine rupture, classical caesarean scare (vertical) or usual contraindications to vaginal delivery
348
what are the two key causes of sepsis in pregnancy
Chorioamnionitis Urinary tract infections
349
what are non specific signs of sepsis
Fever Tachycardia Raised respiratory rate (often an early sign) Reduced oxygen saturations Low blood pressure Altered consciousness Reduced urine output Raised white blood cells on a full blood count Evidence of fetal compromise on a CTG
350
what chart is used to monitor women and their chance of sepsis
maternity early obstetric warning system (MEOWS)
351
what are signs of chorioamnionitis
Abdominal pain Uterine tenderness Vaginal discharge
352
what is the management of sepsis in pregnancy
Septic six - take blood, lactate and urine output, give abx, fluids and oxygen continuous maternal and fetal monitoring emergency caesarean may be indicated antibiotics - piperacillin and tazobactam plus gentamicin/ amoxicillin clindamycin and gentamicin
353
what is amniotic fluid embolism
it is where amniotic fluid passes into the mothers blood - usually occurs around labour and delivery the amniotic fluid contains fetal tissue which causes an immune reaction. This leads to systemic illness
354
what are the main risk factors for amniotic fluid embolism
Increasing maternal age Induction of labour Caesarean section Multiple pregnancy
355
how does amniotic fluid embolism present
can present similar to anaphylaxis, sepsis or PE Shortness of breath Hypoxia Hypotension Coagulopathy Haemorrhage Tachycardia Confusion Seizures Cardiac arrest
356
what is the management of amniotic fluid embolism
supportive medical emergency - ABCDE resuscitation and immediate caesarean if there is cardiac arrest
357
what is uterine rupture
when the muscle layer of the uterus ruptures - incomplete - uterine serosa surrounding the uterus retains intact - complete - serosa ruptures along with the myometrium and the contents of the uterus are released into the peritoneal cavity
358
what are risk factors for uterine rupture
previous caesarean section (main RF) Vaginal birth after caesarean (VBAC) Previous uterine surgery Increased BMI High parity Increased age Induction of labour Use of oxytocin to stimulate contractions
359
how does uterine rupture present
Uterine rupture presents with an acutely unwell mother and abnormal CTG. It may occur with induction or augmentation of labour, with signs and symptoms of: Abdominal pain Vaginal bleeding Ceasing of uterine contractions Hypotension Tachycardia Collapse
360
what is the management of uterine rupture
Uterine rupture is an obstetric emergency. Resuscitation and transfusion may be required. Emergency caesarean section is necessary to remove the baby, stop any bleeding and repair or remove the uterus (hysterectomy).
361
what is uterine inversion
rare complication of birth, where the fundus of the uterus drops down through the uterine cavity and cervix, turning the uterus inside out - life threatening obstetric emergency - incomplete is where the fundus descends inside uterus or vagina but not to vaginal opening - complete is the uterus descending through and out of the vagina
362
how does uterine inversion present
Uterine inversion typically presents with a large postpartum haemorrhage. There may be maternal shock or collapse. An incomplete uterine inversion may be felt with manual vaginal examination. With a complete uterine inversion, the uterus may be seen at the introitus of the vagina.
363
what are the options for treating uterine inversion
1. Johnson manoeuvre - using a hand to push the fundus back into the abdomen. Hand and forearm must be inserted into the vagina and held in place for several minutes 2. Hydrostatic methods - filling vagina with fluid to inflate the uterus back into the normal position 3. Surgery - laparotomy and uterus put back into normal position
364
in girls what is the sign of the the onset of puberty
the development of breast buds
365
what is tanner stage 1 for female puberty
under 10 no pubic hair no breast development
366
what is tanner stage 2 for female puberty
age 10 -11 light and thin pubic hair breast buds form from behind the areola
367
what is tanner stage 3 for female puberty
age 11-13 course and curly pubic hair breast begins to elevate beyond the areola
368
what is tanner stage 4 for female puberty
age 13-24 adult like pubic hair but not reaching the thigh areolar mound forms and projects from surrounding breast
369
what is tanner stage 5 for female puberty
above 14 years pubic hair extending to medial thigh areolar mounds reduce and adult breasts form
370
how does the primary follicle develop
Primordial follicles grow and become primary follicles. These primary follicles have three layers: The primary oocyte in the centre The zona pellucida The cuboidal shaped granulosa cells the granulosa cells secrete the material that becomes the zona pellucida and oestrogen as they grow they develop a surrounding theca folliculi layer (inner layer of this is the theca interna which secretes androgen hormones)
371
how does the secondary follicle develop
as primary follicles become secondary follicles they grow larger and develop small fluid filled gaps between the granulosa cells. Once the follicle reaches the secondary follicle stage they have FSH receptors and further development requires FSH stimulation
372
how do antral follicles develop
the secondary follicle develops a single large fluid filled area within the granulosa cells called the antrum. This fills with increasing amounts of fluid making the follicle expand rapidly the corona radiata is made of granulosa cells and surrounds the zona pellucida and the oocyte at this point one follicle becomes the dominant follicle and the others start to degrade
373
what is the process of fertilisation
when sperm enter the fallopian tube they will penetrate the corona radiata and zona pellucida to fertilise the egg when the sperm enters the egg the 23 chromosomes of the egg multiply into two sets, one set combine with the sperm chromosomes and the other float off to the side and create a polar body
374
what is a polar body
just before ovulation the primary oocyte undergoes meiosis, splitting the 46 chromosomes in the oocyte into two leaving 23, the other 23 float off and become a polar body
375
how does the blastocyst develop
the combination of the egg and sperm produces a zygote this rapidly divides to create a mass of cells called a morula as it travels along the fallopian tube a fluid filled cavity gathers within the group of cells and it becomes a blastocyst the blastocyst contains the main group of cells in the middle (embryoblast), and surrounding the embryoblast and blastocele is the trophoblast
376
how does implantation occur
when the blastocyst arrives at the uterus 8-10 days after ovulation it reaches the endometrium the cells of the trophoblast undergo adhesion to the stroma of the endometrium, forming the syncytiotrophoblast which forms projections into the stoma the cells of the stoma become decidua which provides nutrients to the trophoblast when it implants the syncytiotrophoblast starts to produce bHCG
377
when do the cells of the embryoblast start to differentiate
about a week after fertilisation - splits into two with the yolk sac on one side and the amniotic cavity on the other the embryonic disc develops into the fetal pole and eventually into the fetus
378
what are the two layers of the chorion
the cytotrophoblast and the syncytiotrophoblast. The cytotrophoblast is the inner layer and the syncytiotrophoblast is the outer layer, which is embedded in the endometrium.
379
what week does the embryonic disc develop into the fetal pole
week 5 - splits into the ectoderm, mesoderm, endoderm
380
what does the endoderm become in the body
GIT lungs liver pancreas thyroid reproductive system
381
what does the mesoderm become
heart muscle bone connective tissue blood kidneys
382
what does the ectoderm become
skin hair nails teeth CNS
383
when does the fetal heart form
week 6
384
how do spiral arteries develop
The myometrium sends off artery branches into the endometrium. Initially, these arteries grow straight outwards like plant shoots. As they continue to grow, they coil into a spiral. These thick-walled and coiled arteries are bunched together, making the endometrial tissue highly vascular. These are known as the spiral arteries.
385
how does the placenta develop
The chorionic villi (syncytiotrophoblast that grows into endometrium) nearest the connecting stalk of the developing embryo are the most vascular and contain mesoderm. This area is called the chorion frondosum. The cells in the chorion frondosum proliferate and become the placenta. The connecting stalk becomes the umbilical cord. Placental development is usually complete by 10 weeks gestation.
386
how do the lacunae develop
Trophoblast invasion of the endometrium sends signals to the spiral arteries in that area, reducing their vascular resistance and making them more fragile. The blood flow to these arteries increases, and eventually they break down, leaving pools of blood called lacunae (lakes). Maternal blood flows from the uterine arteries, into these lacunae, and back out through the uterine veins. Lacunae form at around 20 weeks gestation.
387
what are the 5 functions of the placenta
Respiratory Renal/excretion Nutrition immunity endocrine
388
what immunoglobulin crosses the placenta
IgG
389
what waste products are filtered from the fetus via the placenta
urea and creatinine
390
what endocrine functions does the placenta have
production of hCG around week 10 oestrogen - allows muscles and ligaments of uterus and pelvis to expand, cervix soft progesterone - placenta takes over by 5 weeks, role is to maintain pregnancy and relaxes uterine muscles (SA= reflux, constipation, hypotension, headaches, skin flushing)
391
what are the hormonal changes during pregnancy
increased steroid hormones increased T3/T4 increased prolactin increased melanocyte stimulating hormone increased oestrogen increased progesterone increased HCG
392
what are the respiratory changes in pregnancy
increased tidal volume increased resp. rate
393
what are the renal changes in pregnancy
increased blood flow increased GFR increased sodium reabsorption increased water reabsorption increased protein excretion physiological hydronephrosis
394
what are the haematological changes in pregnancy
increased red blood cell production increased white blood cells reduced platelets decreased haematocrit increased clotting factors decreased albumin increased ALP (placenta)
395
what are the cardiovascular changes in pregnancy
increased blood volume increased plasma volume increased cardiac output decreased vascular resistance decreased blood pressure vasodilation varicose veins
396
what are the uterine changes in pregnancy
100g - 1.1kg hypertrophy increased cervical discharge ectropion vagina hypertrophy, increased discharge, candida, bacteria
397
what are Braxton hicks contractions
Braxton-Hicks contractions are occasional irregular contractions of the uterus. They are usually felt during the second and third trimester. Women can experience temporary and irregular tightening or mild cramping in the abdomen
398