obstetrics Flashcards

1
Q

gravidity

A

Number of times a woman has been pregnant regardless of outcome

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2
Q

parity

A

Number of times a woman has given birth to a foetus (gestational age >/=24 weeks) regardless of whether the child was born alive or was stillborn

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3
Q

estimating gestation

A

Naegele’s rule: to the first day of the LMP add 1 year, subtract 3 months, add 7 days)
crown-rump length(CRL): measured by ultrasoundscan between 10+0 and 13+6

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4
Q

CV changes in pregnancy

A

SV up 30%, HR up 15% & cardiac output up 40%
systolic BP is unaltered
diastolic BP is reduced in the 1st and 2nd trimester, returning to non-pregnant levels by term
enlarged uterus may interfere with venous return which can lead to ankle oedema, supine hypotension and varicose veins

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5
Q

resp changes in pregnancy

A

Pulmonary ventilation up by 40%, tidal volume from 500 - 700ml (due to effect of progesterone on respiratory centre)
Oxygen requirements increase by only 20%, therefore over breathing leads to a fall in pCO2 - this can give rise to a sense of dyspnoea that may be accentuated by elevation of the diaphragm
BMR up 15% - this may be due to increased thyroxine and adrenocortical hormones - women may hence find warm conditions uncomfortable

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6
Q

haem changes in pregnancy

A

Maternal blood volume up 30%, mostly in 2nd half
red cells up 20% but plasma up 50% → Hb falls
Low grade increase in coagulant activity
rise in fibrinogen and Factors VII, VIII, X
fibrinolytic activity is decreased - returns to normal after delivery (placental suppression?)
prepares the mother for placental delivery
leads to increased risk of thromboembolism
Platelet count falls
WCC & ESR rise

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7
Q

urinary system changes in pregnancy

A

blood flow increases by 30%
GFR increases by 30-60%
salt and water reabsorption is increased by elevated sex steroid levels
urinary protein losses increase
trace glycosuria is common due to the increased GFR and reduction in tubular reabsorption of filtered glucose

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8
Q

biochem changes in pregnancy

A

calcium requirements increase during pregnancy
especially during 3rd trimester + continues into lactation
calcium is transported actively across the placenta
serum levels of calcium and phosphate actually fall (with fall in protein)
ionised levels of calcium remain stable
Gut absorption of calcium increases substantially - due to increased 1,25 dihydroxy vitamin D

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9
Q

liver changes in pregnancy

A

Unlike renal and uterine blood flow, hepatic blood flow doesn’t change
ALP raised 50%
Albumin levels fall

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10
Q

uterus development in pregnancy

A

100g → 1100g
hyperplasia → hypertrophy later
increase in cervical ectropion & discharge
Braxton-Hicks: non-painful ‘practice contractions’ late in pregnancy (>30 wks)
retroversion may lead to retention (12-16 wks), usually self corrects

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11
Q

baby blues features

A

typically seen 3-7 days following birth and is more common in primips, Mothers are characteristically anxious, tearful and irritable

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12
Q

baby blues mx

A

Reassurance and support, the health visitor has a key role

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13
Q

postnatal depression features

A

Most cases start within a month and typically peaks at 3 months, Features are similar to depression seen in other circumstances

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14
Q

mx postnatal depression

A

As with the baby blues reassurance and support are important. Cognitive behavioural therapy may be beneficial. Certain SSRIs such as sertraline and paroxetine may be used if symptoms are severe

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15
Q

puerperal psychosis features

A

Onset usually within the first 2-3 weeks following birth. Features include severe swings in mood (similar to bipolar disorder) and disordered perception (e.g. auditory hallucinations)

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16
Q

mx puerperal psychosis

A

Admission to hospital is usually required, ideally in a Mother & Baby Unit

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17
Q

screening for postnatal depression

A

The Edinburgh Postnatal Depression Scale
10-item questionnaire, with a maximum score of 30
indicates how the mother has felt over the previous week
score > 13 indicates a ‘depressive illness of varying severity’
sensitivity and specificity > 90%
includes a question about self-harm

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18
Q

when is the booking apointment

A

<10w

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19
Q

what happens at the booking appoitnment

A

education, lifestyle, nutrition
BMI
BP
urine dip
FBC
blood groupo
antibodies and rhesus D
screenin for thalassaemia and sickle cell
offer screenin for HIV, hepB, syphilis

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20
Q

what happens at 11-14w appointment

A

USS: gestational age, multiple pregnancy
offer anaomaly screening

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21
Q

what happens at the 18-20w appointment

A

USS: anomalies, placental location

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22
Q

24w scan

A

measure symothysis-fundal height
monitor hoetal movements

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23
Q

when is the ogtt

A

24-28w

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24
Q

28w appointment

A

give rhesus negative anti d
recheck fbc, blood group and antibody levels
discuss birth plans

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25
Q

36w appoiintment

A

abdo palpation for breech
USS
discuss delivery options

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26
Q

when will a mother be induced

A

41w

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27
Q

what is done at all antenatal appointments

A

BP
urine dip
wellbeing

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28
Q

vitamins in pregnancy

A

400 microgams folic acid, 10 micrograms vit D for all women

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29
Q

vaccines in pregnancy

A

Whooping cough, influenza (live attenuated vaccines CI)

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30
Q

who needs higher doses of vitamins

A

Women at high risk of neural tube defects require a higher dose of folic acid (5mgin the first trimester, in particular those with certain medical conditions which include:
Epilepsy
Previous baby with neural tube defects
Obesity with BMI over 35
Diabetes (Type 1 and 2)
Sickle cell disease
Thalassemia
Malabsorption disorders (e.g. Crohn’s disease)
Those taking folate antagonist drugs (HIV anti-retroviral drugs, methotrexate, sulphonamides)
It should be taken ideally 3 months before pregnancy and up to the first 12 weeks.

Offer all women Vitamin D (10 mcg) per day to reduce the risk of rickets. Women with darker skin, those from any BAME group (Black/Asian/Caribbean) or with a BMI >30 should have a higher dose.

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31
Q

combined test

A

11- 13+6 , USS and bloods Screens for trisomy 13 (Pataus), trisomy 18 (Edwards), trisomy 21

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32
Q

features on combined test suggesting downs syndrome

A

Nuchal translucency (thickened >6mm), BHCG (high), Pregnancy associated plasma protein A PAPP-A (low)

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33
Q

triple test

A

15-20w. alpha-fetoprotein unconjugated oestriol , human chorionic gonadotrophin .

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34
Q

triple test suggesting downs syndrome

A

alpha-fetoprotein (low), unconjugated oestriol (low), human chorionic gonadotrophin (high).

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35
Q

quadruples test

A

15-20w, alpha-fetoprotein ,unconjugated oestriol ), human chorionic gonadotrophin) and inhibin-A (high)

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36
Q

quadruple test suggesting down syndrome

A

alpha-fetoprotein (low), unconjugated oestriol (low), human chorionic gonadotrophin (high) and inhibin-A (high)

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37
Q

what to do if positive downs syndrome screening

A

Chorionic villous sampling (11-14 weeks)
Amniocentesis (15-20 weeks)
Non-invasive prenatal testing (private only)

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38
Q

key differentials for bleeding in early pregnancy

A

Miscarriage=
Ectopic pregnancy:
Molar pregnancy:
Antiphospholipid syndrome:

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39
Q

define miscarriage

A

loss of a pregnancy at less than 24 weeks’ gestation. Early miscarriages occur in the first trimester (<12-13 weeks) and are more common than late miscarriages, which occur at 13-24 weeks

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40
Q

ectopic pregnancy

A

any pregnancy which is implanted at a site outside of the uterine cavity

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41
Q

molar pregnancy

A

A molar pregnancy arises from anabnormalityin chromosomal number during fertilisation

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42
Q

antiphospholipid syndrome

A

An acquired disorder characterised by a predisposition to both venous and arterial thromboses, recurrent foetal loss and thrombocytopenia.

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43
Q

ix for bleeding in early pregnancy

A

History and examination (abdo, bimanual, speculum)
TVUS=gold standard
Bloods: serum b-HCG, FBC, blood group and rhesus status, if pyrexial=triple swabs and CRP
Pregnancy test
In EPAU
If molar pregnancy need histological examination of products of conception

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44
Q

most common site ectopic

A

ampulla of fallopian tube

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45
Q

RF miscarriage

A

Maternal Age >30-35 (largely due to an increase in chromosomal abnormalities)
Previous miscarriage
Obesity
Chromosomal abnormalities (maternal or paternal)
Smoking
Uterine anomalies
Previous uterine surgery
Anti-phospholipid syndrome
Coagulopathies

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46
Q

RF ectopic

A

Previous ectopic pregnancy
Pelvic inflammatory disease (due to adhesion formation)
Endometriosis (adhesion formation)
Intrauterine device or intrauterine system
Progesterone oral contraceptive or implant (due to fallopian tube ciliary dysmotility)
Tubal ligation or occlusion
Pelvic surgery – especially tubal surgery (reversal of sterilisation)
Assisted reproduction i.e. embryo transfer in IVF

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47
Q

RF molar pregnancy

A

Maternal age <20 or >35
Previous gestational trophoblastic disease (this risk is not decreased by a change of partner)
Previous miscarriage
Use of the oral contraceptive pill

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48
Q

sx antiphospholipid syndrome

A

Coagulation disorder (isolated raised APTT)
Livedo reticularis
Obstetric complications
Thrombocytopenia (low platelets)

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49
Q

diagnosis antiphospholipid syndrome

A

Antibody testing needs to be positive on 2 occasions 12 weeks apart
Lupus anticoagulant
Anticardiolipin antibodies
Anti-beta-2 glycoprotein I antibodies

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50
Q

partial molar pregnancy

A

where one ovum with 23 chromosomes is fertilised by two sperm, each with 23 chromosomes. This produces cells with 69 chromosomes (triploidy).

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51
Q

complete molar pregnancy

A

where one ovum without any chromosomes is fertilised by one sperm which duplicates, or (less commonly) two different sperm. This leads to 46 chromosomes of paternal origin alone.
These tumours are usually benign, but can become malignant – invading into the uterine myometrium, and disseminating around the body. These are known asinvasive moles.

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52
Q

sx ectopic pregnancy

A

pain-lower abdominal/pelvic pain, with or without vaginal bleeding. .
Shoulder tip pain– the irritation of the diaphragm by blood in the peritoneal cavity leads to referred shoulder tip pain.
Vaginal discharge– brown in colour, classically described as being akin to prune juice.
On examination, the patient may have localised
abdominal tenderness, with vaginal examination revealing cervical excitation and/or adnexal tenderness.
If the ectopic pregnancy has ruptured, the patient may also be
haemodynamically unstable(pallor, increased capillary refill time, tachycardia, hypotension), with signs of peritonitis (abdominal rebound tenderness and guarding). Vaginal examination may reveal fullness in the pouch of Douglas.

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53
Q

sx molar pregnancy

A

vaginal bleedingand abdominal pain early in pregnancy.
On examination, the uterus can be larger than expected for gestation, and of a soft, boggy consistency.
Hyperemesis– because there is an increased titre of B-hCG which is thought to be linked to nausea in pregnancy.
Hyperthyroidism –gestational thyrotoxicosis due to stimulation of the thyroid by high HCG levels.
Anaemia
Later in pregnancy, a ‘large for dates’ uterus may be noted on examination.

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54
Q

pregnancy of unknown location

A

Can’t be identified on ultrasound scan BUT β-HCG is positive

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55
Q

mx pregnancy unknown location

A

If the initialβ-HCGlevel is >1500 iUand there is no intrauterine pregnancy on transvaginal ultrasound, then this should be considered an ectopic pregnancy until proven otherwise, and a diagnostic laparoscopy should be offered.

If the initialβ-HCGlevel is <1500 iUand the patient is stable, a further blood test can be taken 48 hours later:
In a viable pregnancy, HCG level would be expected to double every 48 hours.
In a miscarriage, HCG level would be expected to halve every 48 hours
Where the increase or drop in the rate of change is outside these limits, an ectopic pregnancy cannot be excluded and the patient should be managed accordingly.

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56
Q

mx miscarriage

A

if the patient is Rhesus negative and is greater than 12 weeks gestation, they requireanti-D prophylaxis

Conservative (Expectant)

Medical management: vaginal misoprostol (prostaglandin analogue) to stimulate cervical ripening and myometrial contractions.

Surgical management: manual vacuum aspiration with local anaesthetic if <12 weeks, or evacuation of retained products of conception (ERPC)

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57
Q

mx ectopiuc pregnancy

A

Medical: IM methotrexate. For patients who: arestable, well controlled pain and β-HCG levels <1500 iU/ml, unruptured, andno visible heartbeat

Surgical management: laparoscopic salpingectomy

Conservative management: serum B-hCGshould be monitored every 48 hrs, patient must be stable with a small and unruptured ectopic

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58
Q

mx molar pregnancy

A

surgery, may need chemo

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59
Q

mx antiphospholipid syndrome

A

LMWH in pregnancy

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60
Q

features threatened miscarriage

A

Mild bleeding +/- PainCervix closed
TVUSS: Viable pregnancy

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61
Q

features inevitable miscarriage:

A

Heavy bleeding, clots, painCervix open
TVUSS: Internal cervical os openedFetus can be viable or non-viable

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62
Q

features missed miscarriage

A

Asymptomatic or hx of threatened miscarriage, on-going discharge, small for dates uterus

TVUSS: No fetal heart pulsation in a fetus where crown rump length is >7mm*

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63
Q

features incomplete miscarriage

A

POC** partially expelled – Sx of missed miscarriage or bleeding/clots

TVUSS: Retained POC, with A/P endometrial diameter >15mm AND proof that were was a intrauterine pregnancy previously present (USS/clinically remove clots)

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64
Q

features complete miscarriage

A

Hx of bleeding, passing clots and POC and pain. Sx settling/settled now
TVUSS: No POC seen in uterus, with endometrium that is <15 mm diameter AND previous proof of intrauterine pregnancy i.e. scan

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65
Q

features of a septic miscarriage

A

Infected POC: fever, rigors, uterine tenderness, bleeding/discharge, pain

TVUSS: Leucocytosis, raised CRP + can be features of complete or incomplete miscarriage

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66
Q

differetnials for antepartum haemorrhage

A

placenta praevia
placental abruption
vasa praevia

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67
Q

placenta praevia

A

placenta lying across OS

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68
Q

placental abruption

A

placental prematurely separates

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69
Q

vasa praevia

A

When foetal vessels lie outside the protection of the umbilical cord or placenta

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70
Q

presentation plaental abruption

A

sudden onset severe continuous abdominal pain, +-Antepartum haemorrhage, can be concealed if cervical os remains closed, Maternal haemodynamic instability, Foetal distress on CTG, Woody abdomen on palpation

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71
Q

presentation vasa praevia

A

Antepartum haemorrhage, Visible pulsating foetal vessels on cervical exam, Immediate bleed and foetal distress following ROM

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72
Q

presentation placental praevia

A

Usually detected on 20w USS / presents 24w+ with painless PV bleeding or asymptomatic until labour.

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73
Q

mx placenta pravia

A

Corticosteroids from 32-36w
Planned CS 36-37w to reduce risk of spontaneous labour and massive haemorrhage.
If already bleeding (antepartum haemorrhage) emergency CS required

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74
Q

mx vasa pravia

A

Corticosteroids from 32w.
Planned CS 34-36w.

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75
Q

mx placental abruption

A

ABCDE, obstetric emergency so immediately involve consultant.
2 grey cannulas + bloods (FBC, U&Es, LFTs, coag). And Crossmatch 4 units of blood.
Fluid and blood resus
Monitor mother and foetus
Corticosteroids, Anti-D prophylaxis if rhesus –ve mother
Emergency CS

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76
Q

abortion act

A

In the UK, termination of pregnancy (TOP) is governed by the The Abortion Act of 1967. There are five ‘categories’ for requesting TOP:
A. that the pregnancy has not exceeded its twenty-fourth week and that the continuance of the pregnancy would involve risk, greater than if the pregnancy were terminated, of injury to the physical or mental health of the pregnant woman or any existing children of her family.
B. that the termination is necessary to prevent grave permanent injury to the physical or mental health of the pregnant woman
C. that the continuance of the pregnancy would involve risk to the life of the pregnant woman, greater than if the pregnancy were terminated D. that there is a substantial risk that if the child were born it would suffer from such physical or mental abnormalities as to be seriously handicapped.

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77
Q

termination of pregnancy

A

Medical termination of pregnancy: Mifepristone, a progesterone antagonist, Followed by Misoprostol 48h later , a prostaglandin analogue.
Surgical termination of pregnancy: Suction termination, Dilatation and evacuation/curettage ‘D&C’

Choice loosely based of gestation
less than 9 weeks: medical management,
less than 13 weeks: surgical dilation and suction of uterine contents
more than 15 weeks: surgical dilation and evacuation of uterine contents or late medical abortion (induces ‘mini-labour’)

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78
Q

features polyhydramnios

A

uterus feels tense or large for dates, may be difficult to feel the foetal parts on palpation of the abdomen

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79
Q

cause of polyhydramnios

A

excessive production of amniotic fluid
insufficient removal of amniotic fluid.
Excess production can be due to increased foetal urination: Maternal diabetes mellitus, Foetal renal disorders, Foetal anaemia, Twin-to-twin transfusion syndrome
Insufficient removal can be due to reduced foetal swallowing: Oesophageal or duodenal atresia, Diaphragmatic hernia, Anencephaly, Chromosomal disorders

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80
Q

complications polyhyramnios

A

Maternal: respiratory compromise (increased pressure on the diaphragm), Increased risk UTIs due to increased pressure on the urinary system, Worsening of other symptoms associated with pregnancy such as gastro-oesophageal reflux, constipation, peripheral oedema and stretch marks, Increased incidence of caesarean section delivery, Increased risk of amniotic fluid embolism (although this is rare)

Foetal: Pre-term labour and delivery, Premature rupture of membranes, Placental abruption, Malpresentation of the foetus (the foetus has more space to “move” within the uterus), Umbilical cord prolapse (polyhydramnios can prevent the foetus from engaging with the pelvis, thus leaving room for the cord to prolapse out of the uterus before the presenting part)

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81
Q

mx polyhydramnios

A

Treatment includes management of any underlying causes (e.g. in maternal diabetes) and amnio-reduction in severe cases.

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82
Q

causes oligohydramnios

A

premature rupture of membranes
Potter sequence
bilateral renal agenesis + pulmonary hypoplasia
intrauterine growth restriction
post-term gestation
pre-eclampsia

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83
Q

pathophysiology rhesus disease

A

if a Rh -ve mother delivers a Rh +ve child a leak of fetal red blood cells may occur
this causes anti-D IgG antibodies to form in mother
in later pregnancies these can cross placenta and cause haemolysis in fetus
this can also occur in the first pregnancy due to leaks

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84
Q

mx rhesus disease

A

All mothers tested at booking
Anti-D immunoglobulin should be given as soon as possible (but always within 72 hours) of a sensitizing event
If known rhesus negative mother given routinely at 28 and 34 weeks
if event is in 2nd/3rd trimester give large dose of anti-D and perform Kleihauer test - determines proportion of fetal RBCs present

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85
Q

ix in rhesus disease

A

all babies born to Rh -ve mother should have cord blood taken at delivery for FBC, blood group & direct Coombs test
Coombs test: direct antiglobulin, will demonstrate antibodies on RBCs of baby
Kleihauer test: add acid to maternal blood, fetal cells are resistant

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86
Q

affects of rhesus disease on fetus

A

oedematous (hydrops fetalis, as liver devoted to RBC production albumin falls)
jaundice, anaemia, hepatosplenomegaly
heart failure
kernicterus
treatment: transfusions, UV phototherapy

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87
Q

sensitising events requiring anti d

A

Antepartum haemorrhage
Placental abruption
Abdominal trauma
External cephalic version
Invasive uterine procedures such as amniocentesis and chorionic villus sampling
Rhesus positive blood transfusion to a rhesus negative woman
Intrauterine death, miscarriage or termination
Ectopic pregnancy
Delivery (normal, instrumental or caesarean section)

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88
Q

RF for VTE

A

PREGNANCY
Age > 35
Body mass index > 30
Parity > 3
Smoker
Gross varicose veins
Current pre-eclampsia
Immobility
Family history of unprovoked VTE
Low risk thrombophilia
Multiple pregnancy
IVF pregnancy

89
Q

VTE PROPHYLAXIS

A

previous VTE history is automatically considered high risk and requires low molecular weight heparin throughout the antenatal period

Four or more risk factors warrants immediate treatment with low molecular weight heparin continued until six weeks postnatal.

If a woman has three risk factors low molecular weight heparin should be initiated from 28 weeks and continued until six weeks postnatal.

If diagnosis of DVT is made shortly before delivery, continue anticoagulation treatment for at least 3 month, as in other patients with provoked DVTs.

90
Q

gestational diabetes diagnosis

A

a fasting plasma glucose level of 5.6mmol/litre or aboveor
a 2‑hour plasma glucose level / glucose tolerance test of 7.8mmol/litre or above

91
Q

who is screened for gestational diabetes

A

First degree relative with diabetes mellitus
At-risk ethnic group
BMI > 30
Previous large baby (>4.5kg) or stillbirth
Persistent glycosuria
Polyhydramnios

92
Q

mx gestational diabetes

A

advice about diet (including eating foods with a low glycaemic index) and exercise should be given

if the fasting plasma glucose level is < 7 mmol/l a trial of diet and exercise should be offered and if glucose targets are not met within 1-2 weeks of altering diet/exercise metformin should be started, if still not met add insulin

if at the time of diagnosis the fasting glucose level is >= 7 mmol/l insulin should be started

glibenclamide should only be offered for women who cannot tolerate metformin or those who fail to meet the glucose targets with metformin but decline insulin treatment

93
Q

mx pre existing dm

A

weight loss for women with BMI of > 27 kg/m^2
stop oral hypoglycaemic agents, apart from metformin, and commence insulin
folic acid 5 mg/day from pre-conception to 12 weeks gestation
detailed anomaly scan at 20 weeks including four-chamber view of the heart and outflow tracts
tight glycaemic control reduces complication rates
treat retinopathy as can worsen during pregnancy

94
Q

dizygotic

A

non-identical, develop from two separate ova that were fertilized at the same time)

95
Q

monozygotic

A

identical, develop from a single ovum which has divided to form two embryos). Around 80% of twins are dizygotic

96
Q

Monoamniotic monozygotic twins are associated with:

A

increased spontaneous miscarriage, perinatal mortality rate
increased malformations, IUGR, prematurity
twin-to-twin transfusions: recipient is larger with polyhydramnios (do laser ablation of interconnecting vessels)

97
Q

predisposing factors for dizygotic twins

A

previous twins
family history
increasing maternal age
multigravida
induced ovulation and in-vitro fertilisation
race e.g. Afro-Caribbean

98
Q

complications in multiple pregnancy

A

Antenatal complications: polyhydramnios, pregnancy induced hypertension, anaemia, antepartum haemorrhage
Fetal complications - perinatal mortality: (twins * 5, triplets * 10), prematurity (mean twins = 37 weeks, triplets = 33), light-for date babies, malformation (3, especially monozygotic)
Labour complications: PPH increased (
2), malpresentation, cord prolapse, entanglement

99
Q

mx multiple pregnancy

A

rest
ultrasound for diagnosis + monthly checks
additional iron + folate
more antenatal care (e.g. weekly > 30 weeks)
precautions at labour (e.g. 2 obstetricians present)
75% of twins deliver by 38 weeks, if longer most twins are induced at 38-40 wks

100
Q

risks of obesity in pregnancy

A

Maternal risks: miscarriage, venous thromboembolism, gestational diabetes, pre-eclampsia, dysfunctional labour, induced labour, postpartum haemorrhage, wound infections, higher caesarean section rate.

Fetal risks: congenital anomaly, prematurity, macrosomia, stillbirth, increased risk of developing obesity and metabolic disorders in childhood, neonatal death

101
Q

mx obesity in pregnancy

A

obese women should take 5mg of folic acid, rather than 400mcg
all obese women should be screened for gestational diabetes with an oral glucose tolerance test (OGTT) at 24-28 weeks
if the BMI >= 35 kg/m² women should give birth in a consultant-led obstetric unit
if the BMI >= 40 kg/m² should have an antenatal consultation with an obstetric anaesthetist and a plan made

102
Q

features cmv in pregnancy

A

Symptoms: asx, mild flu-like illness, mononucleosis syndrome(fever, splenomegaly and impaired liver function

103
Q

mx cmv in pregnancy

A

can’t tx-drugs teratogenic, can offer TOP

104
Q

features gbs in pregnancy

A

asx, UTI, Chorioamnioitis, Endometritis–

105
Q

mx gbs in pregnancy

A

Management: High dose intravenous penicillinsthroughout labour

106
Q

mx uti in pregnancy

A

Nitrofurantoin (avoid at term) 100mg modified-release twice a day for 7 days if eGFR ≥45ml/minute

107
Q

mx asx bacteruria

A

Offer an immediate antibioticprescription, then take into account urine culture and susceptibility results and previous antibiotic use and choose from: Nitrofurantoin (avoid at term), Amoxicillin (only if culture results available and susceptible), Cefalexin

108
Q

mx chorioamnionitis in pregnancy

A

Prompt delivery of the foetus (via cesarean section if necessary) and administration of intravenous antibiotics

109
Q

mx varicella zoster in pregnancy

A

Management: If not immune and<20w gestation=varicella zoster immunoglobulin (VZIG)within 10 days of the contact. If not immune and>20 weeks gestation=eitherVZIG, orAciclovirdays 7 to 14 following exposure. Aciclovir(800mg PO 5tds for patients presenting within 24 hours of rash onset and at >20 weeks gestation
Don’t vaccinate while pregnant

110
Q

chlamydia in pregnancy

A

azithromycin and erythromycin

111
Q

gonorrhoea in pregnancy

A

intramuscularceftriaxone 1g

112
Q

syphilis in pregnancy

A

benpen

113
Q

hsv in pregnancy

A

acquired in 1st/2nd trimester=oral aciclovir in standard doses (400 mg three times daily, usually for 5 days) then daily suppressive aciclovir 400 mg three times daily from 36 weeks of gestation, normal delivery. Acquired in 3rd trimester= standard acyclovir treatment then continue with daily suppressive aciclovir 400 mg three times daily until delivery by caesarean section. Recurrent HSV=daily suppressive aciclovir 400 mg three times daily should be considered from 36 weeks of gestation

114
Q

trichomonas vaginalis in pregnancy

A

Metronidazole400-500mg twice daily for 5-7 days

115
Q

BV in pregnancy

A

Metronidazole400-500mg twice daily for 5-7 days

116
Q

candidiasis in pregnancy

A

more common in pregnancy, do not give oral antifungal, tx with intravaginal antifungal (e.g. clotrimazole) or topical antifungal

117
Q

gestational htn

A

HTN starting after 20 weeks gestation NO proteinuria

118
Q

pre-eclampsi

A

gestational HTN associated with organ damage (proteinuria)

119
Q

eclampsia

A

seizures due to pre-eclampsia

120
Q

HELLP syndrome

A

HTN, proteinuria, haemolysis, elevated liver enzymes and a low platelet count

121
Q

DIC markers

A

low platelet count, elevated D-dimer concentration, decreased fibrinogen concentration, prolonged prothrombin time

122
Q

sx pre-eclampsia

A

Headache, Visual disturbance or blurriness, N+V, Upper abdominal or epigastric pain, Oedema, Reduced urine output, Brisk reflexes, RUQ pain

123
Q

diagnosing pre-eclampsia

A

Systolic blood pressure above 140 mmHg OR Diastolic blood pressure above 90 mmHg PLUS Proteinuria(1+ or more on urine dipstick) OR Organ dysfunction(e.g. raised creatinine, elevated liver enzymes, seizures, thrombocytopenia or haemolytic anaemia) OR Placental dysfunction(e.g. fetal growth restriction or abnormal Doppler studies)

124
Q

mx pre-eclampsia

A

Labetalol first line, nifedipine 2nd. If high risk then aspirin from 12w

125
Q

complications pre-eclampsia

A

Eclampsia, HELLP, DIC

126
Q

mx eclampsia

A

IV magnesium sulphate, treatment should continue for 24 hours after last seizure or delivery (around 40% of seizures occur post-partum)

127
Q

tx HELLp syndrome

A

Deliver baby

128
Q

mx obstetric cholestasis

A

occurs after 24 weeks of pregnancy
treated with emollients or sedating antihistamines such as chlorphenamine or promethazine at night
Should aim for delivery at 37-38 weeks as it is associated with sponteanous fetal death and maternal haemorrhage

129
Q

when to tx for iron deficiency anaemia

A

Cut offs for treatment: first trimester <110, 2nd/3rd <105, postpartum <100

130
Q

hyperemersis gravidarum

A

refers topersistent and severe vomiting during pregnancy, whichleads to weight loss, dehydration and electrolyte imbalances

131
Q

diagnosing hyperemesis gravidarum

A

prolonged and severe NVP with more than 5% pre-pregnancy weight loss, Dehydration, and Electrolyte imbalances.
It is thought to be due rapidly increasing levels ofbeta human chorionic gonadotrophin(hCG) hormone

132
Q

RF hyperemsis gravidarum

A

First pregnancy, Previous history of hyperemesis gravidarum, Raised BMI, Multiple pregnancy, Hydatidiform mole
Pregnancy-Unique Quantification of Emesis(PUQE)

133
Q

mx hyperemesis gravidarum

A

Mild: community with oral antiemetics, oral hydration, dietary advice and reassurance.

Moderate: ambulatory daycarefor IV fluids, parenteral antiemetics and thiamine.

Severe: inpatient management for antiemetic therapies are shown in the box below. A combination of therapies should be used if there is no response to a single therapy.

Other therapies: IV rehydration, H2 receptor antagonists,
Thiamine, Thromboprophylaxis

Antiemetics:
First line: Cyclizine, Prochlorperazine, Promethazine, Chlorpromazine
Second line: Metoclopramide (maximum 5 days due to risk of extrapyramidal side effects), Domperidone, Ondansetron
Third line: Hydrocortisone IV

134
Q

features acute fatty liver of pregnancy

A

very rare but presents as:
Deranged liver function tests (acute liver failure)
Raised PT (disseminated intravascular coagulation) and low platelets
Vague symptoms such as abdo pain, nausea, malaise, mild jaundice
In the third trimester

135
Q

mx acute fatty liver of pregnancy

A

delivery – delay can result in coma and death secondary to hepatic failure. Resolves spontaneously after delivery

136
Q

mx epilepsy in pregnancy

A

If no fits for >2 years then stop medication
Need to take 5mg/day of folic acid (normal pregnancy is 400mcg/day) until the end of the first trimester
Vitamin K therapy is needed from 36 weeks If seizures occur during labour – give benzos to avoid hypoxia in mum/baby
Breastfeeding is important after delivery so that the baby can withdraw slowly (AED levels are small but lesser in breastmilk)
NICE says lamotrigine and levetiracetam are the safest in pregnancy

137
Q

mx hypothyrodism in pregnancy

A

increase levothyroxine by 25 mcg as soon as pregnancy is confirmed despite a euthyroid state

138
Q

mx postpartum thyroiditis

A

just need symptomatic relief – propranolol

139
Q

preterm labour

A

onset of regular uterine contractions and cervical changes <37 weeks gestation

140
Q

preterm birth

A

delivery of a baby >20 weeks but <37 weeks

141
Q

Premature rupture of the membranes (PROM) –

A

rupture of membranes at least one hour before the onset of contractions, >/= 37w

142
Q

Prolonged premature rupture of the membranes –

A

rupture of membranes >24hrs before onset of labour

143
Q

Preterm premature rupture of the membranes (PPROM)

A

– rupture of membranes at least one hour before the onset of contractions <37 weeks gestation

144
Q

risks PROM/PPROM

A

Chorioamnionitis– inflammation of the fetal membranes, due to infection. The risk increases the longer the membranes remain ruptured and baby undelivered.

Oligohydramnios– this is particularly significant if the gestational age is less than 24 weeks, as it greatly increases the risk of lung hypoplasia. Neonatal death– due to complications associated with prematurity, sepsis and pulmonary hypoplasia. Placental abruption, Umbilical cord prolapse

145
Q

RF prom and PPROM

A

Smoking (especially < 28 weeks gestation).Previous PROM/ pre-term delivery.
Vaginal bleeding during pregnancy.
Lower genital tract infection.
Invasive procedures e.g. amniocentesis.Polyhydramnios.
Multiple pregnancy.
Cervical insufficiency

146
Q

mx PROM/PPROM >36w

A

Monitorfor signs of clinical chorioamnionitis.Clindamycin/penicillin during labour if GBS isolated.
Watch and waitfor 24 hours (60% of women go into labour naturally), or considerinduction of labour.
IOL and deliveryrecommended if greater than 24 hours (but women can wait up to 96 hours – beyond this is their choice after counselling)

147
Q

mx PROM/PPROM 34-36w

A

Monitorfor signs of clinical chorioamnionitis, and advise patient to avoid sexual intercourse (canincrease risk of ascending infection).Prophylactic erythromycin250 mg QDS for 10 days.
Clindamycin/penicillin during labour if GBS isolated.
Corticosteroids if between 34 and 34+6 weeks gestation.
Magnesium sulphate is given to prevent cerebral palsy. Give if 23–32 weeks – single dose of 4g by slow IV injection
IOL and delivery recommended.

148
Q

mx PROM/PPROM 24-36w

A

Monitorfor signs of clinical chorioamnionitis, andadvise patient to avoid sexual intercourse.Prophylactic Erythromycin250 mg QDS for 10 days.
Corticosteroids (as less than 34+6).
Aim expectant management until 34 weeks.

149
Q

indications for IOL

A

prolonged pregnancy, e.g. 1-2 weeks after the estimated date of delivery
prelabour premature rupture of the membranes, where labour does not start
diabetic mother > 38 weeks
pre-eclampsia
rhesus incompatibility

150
Q

bishop score interpretation

A

a score of < 5 indicates that labour is unlikely to start without induction
a score of ≥ 8 indicates that the cervix is ripe, or ‘favourable’ - there is a high chance of spontaneous labour, or response to interventions made to induce labour

151
Q

bishop score

A

0: posterior cervix, firm cervix, effacement 0-30%, dilation <1cm, fetal station -3
1: intermediate cervix position and consistency, effacement 40-50%, dilation 1-2cm, station -2
2: anterior and soft cervix, effacement 60-70%, dilation 3-4cm, station -1/0
3: effacement 80%, dilation >5cm, station +1/2

152
Q

methods IOL

A

membrane sweep: involves the examining finger passing through the cervix to rotate against the wall of the uterus, to separate the chorionic membrane from the decidua. Nulliparous women are typically offered this at the 40- and 41-week antenatal visit, whereas parous women are offered it at the 41-week visit

vaginal prostaglandin E2 (PGE2): NICE state that vaginal PGE2 is the preferred method of induction of labour, unless there are specific clinical reasons for not using it
maternal oxytocin infusion

amniotomy (‘breaking of waters’)

cervical ripening balloon: passed through the endocervical canal and gently inflated to dilate the cervix

153
Q

complications IOL

A

Uterine hyperstimulation: prolonged and frequent uterine contractions. Management =removing the vaginal prostaglandins if possible and stopping the oxytocin infusion if one has been started
tocolysis with terbutaline

154
Q

signs of labour

A

regular and painful uterine contractions
a show (shedding of mucous plug)
rupture of the membranes (not always)
shortening and dilation of the cervix

155
Q

stages of labour

A

stage 1: from the onset of true labour to when the cervix is fully dilated
stage 2: from full dilation to delivery of the fetus
stage 3: from delivery of fetus to when the placenta and membranes have been completely delivered

156
Q

labour stage 1

A

from the onset of true labour to when the cervix is fully dilated. In a primigravida lasts typical 10-16 hours
latent phase = 0-3 cm dilation, normally takes 6 hours
active phase = 3-10 cm dilation, normally 1cm/hr

157
Q

labour stage 2

A

from full dilation to delivery of the fetus
‘passive second stage’ refers to the 2nd stage but in the absence of pushing (normal)
active second stage’ refers to the active process of maternal pushing
lasts approximately 1 hours

158
Q

labour stage 3

A

begins at delivery of the foetus and ends with delivery of the placenta and foetal membranes.
Generally, it lasts 30 minutes to an hour when allowed to occur naturally or 5-10 minutes with administration of oxytocin.
Active management of the third stage: routine use of uterotonic drugs, deferred clamping and cutting of the cord, controlled cord traction after signs of separation of the placenta.

159
Q

passage of baby

A
  1. descent
  2. flexion (of head)
  3. internal rotation to oblique
  4. extension
  5. external rotation: aka restitution
160
Q

CTG interpretation

A

Dr = define (maternal) risk, high risk = continuous CTG.
C = contractions (bottom trace, frequency not strength).
Bra = baseline rate:
>160 – maternal pyrexia, prematurity, chorioamnionitis, hypoxia.
<110 – maternal beta-blockers, increased foetal vagal tone.
V = variability:
Reduced variability may be hypoxia, lactic acidosis, prematurity.
Baby may be sleeping so 40m of reduced variability acceptable.
A = accelerations (rise in baseline HR by 15 for ≥15s):
Reassuring as shows baby moving.
D – decelerations (fall in baseline HR by 15 for ≥15s):
Early = peak of contraction corresponds with trough of deceleration.
Often head compression from uterine contraction (normal).
Late = deceleration after contraction, suggest hypoxia.
Placental insufficiency, asphyxia.
Variable = vary in shape + timing, suggests cord compression.
O = overall assessment.

161
Q

reasuring baseline CTG

A

110–160bppm

162
Q

reasuring CTG variability

A

> 5bpm

163
Q

reasuring CTG acceleration

A

present

164
Q

reassuring VTG decelerations

A

early

165
Q

instrumental delivery

A

Ventouse: less pain, lower success
Forceps: less fetal but more maternal complications

pre-requisites for performing an instrumental delivery are: Fully dilated, Ruptured membranes, Cephalic presentation, Defined fetal position, Fetal head at least at the level of the ischial spines, and no more than 1/5 palpable per abdomen, Empty bladder, Adequate pain relief, Adequate maternal pelvis

166
Q

indications instrumental delivery

A

Maternal: Inadequate progress, Maternal exhaustion, medical conditions that mean active pushing or prolonged exertion should be limited e.g. intracranial pathologies, some maternal congenital heart diseases and severe hypertension
Fetal: fetal compromise, clinical concerns e.g. antepartum haemorrhage

167
Q

absolute CI to instrumental delivery

A

Absolute: Unengaged fetal head in singleton pregnancies, Incompletely dilated cervix in singleton pregnancies, True cephalo-pelvic disproportion Breech and face presentations, and most brow presentations, Preterm gestation (<34 weeks) for ventouse, High likelihood of any fetal coagulation disorder for ventouse.

168
Q

complications instrumental delivery

A

Fetal: Neonatal jaundiceScalp lacerations, Cephalhaematoma, Subgaleal haematoma, Facial bruising, Facial nerve damage, Skull fractures, Retinal haemorrhage

Maternal: vaginal tears3rd/4thdegree tears:, VTE, Incontinence, PPH, Shoulder dystocia, Infection

169
Q

mx breech

A

Breech (most common type)– attempt ECV before labour, vaginal breech delivery or C-section

170
Q

mx brow presentation

A

CS

171
Q

mx face presentation

A

If the chin is anterior (mento-anterior) a normal labour is possible; however, it is likely to be prolonged and there is an increased risk of a C-section being required
If the chin is posterior (mento-posterior) then a C-section is necessary

172
Q

mx shoulder presentation

A

CS

173
Q

mx malposition

A

90% of malpositions spontaneously rotate to occipito-anterior as labour progresses. If the fetal head does not rotate, rotation andoperative vaginal deliverycan be attempted. Alternatively a C-section can be performed.

174
Q

RF malposition

A

Prematurity
Multiple pregnancy
Uterine abnormalities (e.g fibroids, partial septate uterus)
Fetal abnormalities
Placenta praevia
Primiparity

175
Q

when is ecv done

A

36-38w

176
Q

complications ecv

A

: fetal distress, premature rupture of membranes, antepartum haemorrhage (APH) and placental abruption.

177
Q

CI ecv

A

APH, ruptured membranes, uterine abnormalities or aprevious C-section.

178
Q

types of breech

A

Complete (flexed) breech(both legs are flexedat the hips and knees
Frank (extended) breech (both legs are flexed at the hip and extended at the knee - most common type of breech presentation),
Footling breech(one or both legs extended at the hip, so that the foot is the presenting part)

179
Q

complicaytions of breech

A

cord prolapse(Fetal head entrapment
Premature rupture of membranes
Birth asphyxia – usually secondary to a delay in delivery.
Intracranial haemorrhage – as a result of rapid compression of the head during delivery.

180
Q

primary pph

A

> 500 ml of blood per-vagina within 24 hours of delivery. It can be classified into two main types: Minor PPH – 500-1000ml of blood loss, Major PPH – >1000ml of blood loss

181
Q

causes primary pph

A

Tone: uterine atony, which is the most common cause of primary post-partum haemorrhage, the uterus fails to contract adequately following delivery.

Tissue: retentionof placental tissue – which prevents the uterus from contracting.

Trauma: damage sustained to the reproductive tract during delivery (e.g. vaginal tears, cervical tears).

Thrombin: Vascular–Placental abruption, hypertension, pre-eclampsia, Coagulopathies– von Willebrand’s disease, haemophilia A/B, ITP or acquired coagulopathy i.e. DIC, HELLP.

182
Q

mx uterine atony

A

A_E
Uterine Atony: Bimanual compression, syntocinon, Surgical measures (intrauterine balloon tamponade, haemostatic suture around uterus (e.g. B-lynch), bilateral uterine or internal iliac artery ligation, hysterectomy)

183
Q

mx retained placenta

A

Administer IV Oxytocin, manual removal of placenta withregional or general anaesthetic, and prophylactic antibiotics in theatre. Start IV Oxytocin infusion after removal.

184
Q

secondary pph

A

excessive vaginal bleeding in the period from 24 hours after delivery to twelve weeks postpartum.

185
Q

causes secondary pph

A

endometritis, Retained placental fragments or tissue, Abnormal involution of the placental site, Trophoblastic disease(very rare), A personal history of secondary PPH.

186
Q

mx secondary pph

A

USS to rule out retained tissue

Antibiotics– usually a combination of ampicillin (clindamycin if penicillin allergic) and metronidazole.
Gentamicin should be added to the above combination in cases of endomyometritis (tender uterus) or overt sepsis.

Uterotonics– examples include syntocinon (oxytocin), syntometrine (oxytocin+ergometrine), carboprost (prostaglandin F2) and misoprostol (Prostaglandin E1).

Surgical measuresshould be undertaken if there is excessive or continuing bleeding (irrespective of ultrasound findings). In continuing haemorrhage, insertion of a balloon catheter into the uterus may be effective.

187
Q

presentation endometritis

A

fever/rigors, lower abdominal pain and tenderness or foul smelling lochia (the normal discharge from the uterus following childbirth), PPH

188
Q

RF plaenta accreta spectrum

A

previous caesarean section
placenta praevia

189
Q

placenta accreta

A

chorionic villi attach to the myometrium, rather than being restricted within the decidua basalis

190
Q

placenta increta

A

chorionic villi invade into the myometrium

191
Q

placenta percreta

A

chorionic villi invade through the perimetrium

192
Q

mxplacenta accreta spectrum

A

CS

193
Q

RF cord prolapse

A

Breech, unstable lie, artificial ROM, polyhydramnios, prem

194
Q

sx cord prolapse

A

Non reassuring CTG, fetal bradycardia

195
Q

mx cord prolapse

A

EMERGENCY: don not handle cord, manually elevate presenting part (or fill the maternal bladder with 500ml of normal saline), left lateral or knee-chest position, tocolysis (e.g. terbutaline) while waiting for CS, EMERGENCY CS

196
Q

RF uterine rupture

A

Prev CS, prev uterine surgery, induction, obstruction of labour, multiple pregnancy, multiparity

197
Q

features uterine rupture

A

Non-specific, abdo pain, hypovolaemic shock, foetal distress

198
Q

mx uterine rupture

A

EMERGENCY – A-E assessment, CS

199
Q

RF shoulder dystocia

A

Pre-labour: Previous shoulder dystocia, macrosomia, Diabetes, Maternal BMI > 30, Induction of labour
Intrapartum: Prolonged 1st stage of labour, Secondary arrest, Prolonged second stage of labour, Augmentation of labour with oxytocin, Assisted vaginal delivery

200
Q

features shoulder dystocia

A

Difficulty in delivering fetal head, failure of restitution, ‘turtle neck’ sign

201
Q

mx shoulder dystocia

A

Call for help, stop pusing, consider episiotomy
Maneuvers: FIRST LINE: McRoberts, suprapubic pressure. 2ND LINE: posterior arm, corkscrew (internal rotation)

202
Q

comploications shoulder dystocia

A

Maternal – 3rd or 4th degree tears (3-4%), post-partum haemorrhage (11%).
Fetal – humerus or clavicle fracture, brachial plexus injury (2-16%), hypoxic brain injury.

203
Q

umbilical cord prolapse

A

where the umbilical cord descends through the cervix, with (or before) the presenting part of the fetus

204
Q

uterien rupture

A

a full-thickness disruption of the uterine muscle and overlying serosa. It typically occurs during labour, and can extend to affect the bladder or broad ligament.

205
Q

shoulder dystocia

A

after delivery of the head, the anterior shoulder of the fetus becomes impacted on the maternal pubic symphysis, or (less commonly) the posterior shoulder becomes impacted on the sacral promontory

206
Q

indications CS

A

absolute cephalopelvic disproportion
placenta praevia grades 3/4
pre-eclampsia
post-maturity
IUGR
fetal distress in labour/prolapsed cord
failure of labour to progress
malpresentations: brow
placental abruption: only if fetal distress; if dead deliver vaginally
vaginal infection e.g. active herpes
cervical cancer (disseminates cancer cells)

207
Q

types CS

A

lower segment caesarean section: now comprises 99% of cases
classic caesarean section: longitudinal incision in the upper segment of the uterus

208
Q

cat 1 CS

A

an immediate threat to the life of the mother or baby. examples indications include: suspected uterine rupture, major placental abruption, cord prolapse, fetal hypoxia or persistent fetal bradycardia. delivery of the baby should occur within 30 minutes of making the decision

209
Q

cat 2 CS

A

maternal or fetal compromise which is not immediately life-threatening. delivery of the baby should occur within 75 minutes of making the decision

210
Q

cat 3 CS

A

delivery is required, but mother and baby are stable

211
Q

cat 4 CS

A

elective

212
Q

common complications after CS

A

Maternal:
persistent wound and abdominal discomfort in the first few months after surgery
increased risk of repeat caesarean section when vaginal delivery attempted in subsequent pregnancies
readmission to hospital
haemorrhage
infection (wound, endometritis, UTI)

Fetal:
lacerations, one to two babies in every 100

213
Q

contraception after delivery

A

Women become fertile 21 days after delivery
Progesterone-only methods and the copper coil are all safe immediately after delivery and during breastfeeding
Women who are not breastfeeding should wait 3 weeks to start combined hormonal contraception, those who are breastfeeding should wait 6 weeks
Lactational amenorrhoea is 98% effective for the first 6 months if the woman is fully breastfeeding and amenorrhoeic
Contraception is needed from 5 days of ectopic pregnancy management, miscarriage or abortion

214
Q

infertility

A

failure to achieve a pregnancy after 12 months or more of regular unprotected sex (without contraception) between a man and a woman”
Primary infertility:when a couple has never been able to conceive
Secondary infertility:when a couple cannot get pregnant again, despite previously having been able to without any difficulty

215
Q

when to refer for infertility

A

begin in primary care and involve performing tests on both the male (e.g. semen analysis) and female (e.g. female hormonal testing).
Referrals for specialist clinical assessment should be considered in couples who, despite having normal examination/investigation findings, are still unable to conceive after 1 year.
Earlier referral may be considered for women aged 36 years or over (refer after 6 months), or if there is a suspected underlying cause for infertility as suggested by history/examination e.g. previous pelvic inflammatory disease

216
Q

ix infertility

A

semen analysis
serum progesterone 7 days prior to expected next period. For a typical 28 day cycle, this is done on day 21.<16=repeat and refer if stays low, 16-30=repeat, >30 indicates ovulation

217
Q

fertility counselling

A

folic acid
aim for BMI 20-25
advise regular sexual intercourse every 2 to 3 days
smoking/drinking advice

218
Q

fertility tx

A

Medical treatment e.g. drugs to induce ovulation such as Clomifene
Surgical treatment e.g. tubal microsurgery in women with tubal damage
Assisted conception e.g. intrauterine insemination, in vitro fertilisation (IVF)
counselling before, during and after investigation and treatment – irrespective of the outcome.

219
Q

ovarian hyperstimulation syndrome

A

complication seen in some forms of infertility treatment