OBGYN Flashcards
What is pre-eclampsia?
What is the 1st line management?
~ 2nd line management?
Pregnancy-induced hypertension occurring after 20 weeks gestation with proteinuria.
Labetelol
~ Nifedipine
List some complications of shoulder dystocia: (4)
- Brachial plexus injury (commonly Erb’s palsy (waiter’s tip))
- Perineal tears
- Fetal hypoxia (→ cerebral palsy if prolonged)
- Postpartum haemorrhage (T = trauma!)
What pathology is seen in the condition: “transposition of the great arteries”?
What needs to occur postnatally to make it temporarily compatible with life? - Give examples of 3 things that could occur:
This condition is usually detected antenatally. What is given immediately after birth before the baby is transferred for surgical correction? - What does this do?
The pulmonary artery arises from the left ventricle & the aorta arises from the right ventricle (they’ve swapped)
There needs to be a shunt between R & L ventricles so that oxygenated blood goes to systemic circulation
1) patent ductus arteriosus (connection between pulmonary trunk & aorta)
2) atrioseptal defect
3) ventriculoseptal defect
Prostaglandin E is given - prevents the ductus arteriosus from closing
How long after starting the following contraception is additional protection (condom’s) needed?
a) combined contraceptive pill
b) progesterone-only pill
a) 7 days
b) 2 days
What are Braxton-Hicks contractions?
Are they indicative of the onset of labour?
Occasional irregular contractions of the uterus.
They are NOT true contractions & do not indicate the onset of labour
List some common symptoms of ovarian cancer: (6)
What are the 2 initial investigations if ovarian cancer is suspected?
- Abdominal bloating
- Early satiety
- Loss of appetite
- Weight loss
- Ascites
- Pelvic pain
CA125 & Transvaginal US
State the 5 criteria of the Bishops Score:
~ state the characteristics seen in each criteria that indicate onset of labour
What is the Bishops Score used for?
~ what is the pivoting score?
→ Position of the cervix (anterior)
→ Effacement of the cervix (length - shorter = better)
→ Consistency of the cervix (soft)
→ Dilatation of the cervix (bigger = better)
→ Station of the presenting part (distance in cm in relation to the ischial spines)
Bishops score is used to assess whether induction of labour would be successful
~ score of 8 indicates successful induction
What causes urge incontinence?
What causes stress incontinence?
Urge incontinence:
Overactive detrusor muscle (aka, overactive bladder)
Stress incontinence:
Weak pelvic floor & sphincter muscles
Which muscles compose the pelvic diaphragm?
Levator ani (puborectalis, pubococcygeus, iliococcygeus) & coccygeus
What is placenta praevia?
When would placenta praevia be diagnosed in a pregnancy if it’s present?
What is the common presentation of placenta praevia?
If someone is identified as having placenta praevia, when would they be given repeat US’s?
What is the management of placenta praevia regarding the delivery?
Placenta praevia: when the placenta is attached in the lower portion of the uterus - often covering the cervical os.
At the 20 week anomaly scan
Painless bleeding (antepartum haemorhage)
32 & 36 weeks gestation (if present on the 32 week scan to guide decisions about delivery)
C-section should be planned for 36-37 weeks (to avoid spontaneous labour as vaginal delivery is contraindicted)
What is the commonest presenting symptom of endometrial cancer?
List 2 other common symptoms:
Name 2 protective factors against endometrial cancer:
POST-MENOPAUSAL BLEEDING !
~ Intermenstrual bleeding
~ Unusually heavy menstrual bleeding
• Smoking
• COCP
What are the steps of the 2nd stage of labour? (The steps/ movements of the baby as it moves along the birth canal) (7)
1) Engagement: foetus head is fully engaged with pelvis
2) Descent: foestus starts to descend along birth canal
3) Flexion: foetus head flexes towards chest
4) Internal rotation: foetus internally rotates to face mothers back
5) Extension: foetal head extends & is delivered
6) Restitution: foetus externally rotates to face anteriorly
7) Expulsion: anterior shoulder is delivered, followed by the rest of body
When would a primary postpartum haemorrhage occur?
When would a secondary postpartum haemorrhage occur?
How many mls of blood needs to be lost for a classification of:
a) minor PPH
b) major/ moderate PPH
c) severe PPH
What are the 4 causes of a PPH?
~ what is the commonest cause?
- *Primary**: within the first 24h
- *Secondary**: between 24h - 12 weeks after delivery
- *Minor** PPH: under 1000mls
- *Major/ moderate** PPH: 1000 - 2000mls
- *Severe** PPH: 2000mls +
- Tissue (retained placenta)
- Tone (of uterus = uterine antony is commonest cause)
- Trauma (eg, perineal tear)
- Thombin (bleeding disorder)
What are the steps of the 2nd stage of labour? (The steps/ movements of the baby as it moves along the birth canal) (7)
1) Engagement: foetus head is fully engaged with pelvis
2) Descent: foestus starts to descend along birth canal
3) Flexion: foetus head flexes towards chest
4) Internal rotation: foetus internally rotates to face mothers back
5) Extension: foetal head extends & is delivered
6) Restitution: foetus externally rotates to face anteriorly
7) Expulsion: anterior shoulder is delivered, followed by the rest of body
What is the diagnostic triad for hyperemesis gravidarum?
- >5% pre-pregnancy weight loss
- Dehydration
- Electrolyte imbalance
Erb’s palsy results in damage to what nerves of the brachial plexus?
What obstetric emergency can result in Erb’s palsy?
C5 & C6
Shoulder dystocia
Explain the pathology in each miscarriage & say whether miscarriage is certain or not:
a) Threatened miscarriage
b) Inevitable miscarriage
c) Complete miscarriage
d) Missed miscarriage
a) Threatened miscarriage:
Mild bleeding, mild/ no pain, cervical os is closed, foetus present intrauterine - Miscarriage may or may not occurr
b) Inevitable miscarriage:
Heavy bleeding, pain, cevical os is open, foetus currently present intrauterine - Miscarriage is inevitable
c) Complete miscarriage
+/- bleeding/ pain, cevical os closed, NO products of conception intrauterine anymore (all have been expelled) - Miscarriage has already occurred
d) Missed miscarriage
Asymptomatic, cevical os closed, foetus currently present intrauterine but is dead
If a woman is *Rh- and is carrying a Rh+ baby and there is no intervention, what will happen during delivery/ when there is mixing of blood?
Why does this happen?
When should this be checked for during pregnancy?
What can be given as prophylaxis for this?
*Rh = rhesus
The women will start developing anti-D antibodies after any sensitising event (commonly giving birth)
If someone is rhesus negative, they don’t have the D antigen on their RBC’s so if their blood comes into contact with someone that is rhesus positive then their blood will start producing antibodies against the foreign antigens.
Rh status of mother & baby is checked at the booking appointment (week 10)
If mother is negative & baby is positive, prophylaxis = anti D injection at 28 weeks gestation PLUS immediately after any sensitising events
What is the physiological cause of the menopause?
Ovarian failure* which results in oestrogen deficiency
* Decreased ovarian function due to very few follicles remaining
List some symptoms of pre-eclampsia: (5)
What medication is used to treat a seizure in eclampsia?
Headache
Changes in vision (commonly blurred vision)
Nausea / vomiting
Ankle oedema
Upper abdominal pain
Eeclampsia: IV magnesium sulphate
List some drug free techniques to control pain during labour: (3)
List the 4 main pain relief options for labour that involve medications:
- TENS machine
- Birthing ball
- Birthing pool
- Entenox (gas & air = NO)
- IM diamorphine
- Remifentanil (administered as patient controlled anaesthesia - patient has a button to press when needing a dose)
- Epidural
What method is used in primary prevention of cervical cancer in the UK?
What method is used in secondary prevention of cervical cancer in the UK?
What 2 strains of HPV are associated with cervical cancer?
HPV vaccine to 12-14y olds
Smear tests - every 5 years between 25-64y
Strains 16, 18
List some common symptoms of menopause. (6)
Hot flushes
Night sweats
Vaginal dryness
Reduced libido
Mood swings
Fatigue
Around what week gestation should a booking appointment occur in?
Week 10
What is the 2nd line management of pre-eclampsia?
Nifedipine (anti-hypertensive)
If premature delivery is likely, what should be given to the mother & why?
Corticosteroids - to encourage maturation of the fetal lungs
In regards to multiple pregnancy, what do the following terms mean:
- Monoamniotic
- Diamniotic
- Monochorionic
- Dichorionic
If you see the lambda sign on an US, what type of twins does that indicate?
1. Monoamniotic: Single amniotic sack (shared between babies)
2. Diamniotic: 2 separate amniotic sacs (each baby has their own)
3. Monochorionic: Single placenta (shared between babies)
4. Dichorionic: 2 separate placenta’s (each baby has their own)
Lambda sign = dichorionic, diamniotic (2 sacs & 2 placenta’s)
What features are seen in HELLP syndrome?
H - haemolysis
EL - elevated liver enzymes
LP - low platelets
List 3 functions of oxytocin:
List 2 uses of nifedipine throughout pregnancy:
Oxytocin
• Ripening of cervix
• Stimulates contractions of uterus
• Squeezes mammary ducts to aid in breastfeeding
Nifedipine
• 2nd line Pre-eclampsia treatment (to control hypertension)
• Tocolysis (in premature labour)
Which diagnosis must you rule out if someone presents with post-menopausal bleeding?
Endometrial cancer
What is the commonest cause of macrosomia?
List some risk factors of a macrosomic baby during birth: (5)
Maternal diabetes (eg, gestational diabetes)
- Shoulder dystocia
- Pernieal tears
- Instrumental delivery/ C-section
- Clavicle fracture of baby
- Erbs palsy (brachial plexus injury - common from shoulder dystocia)
Interpret the following:
G2 P1
This lady has been pregnant twice but has only had 1 delivery past 24 weeks gestation
Shoulder dystocia is a medical emergency. This occurs when the shoulder gets stuck behind what structure?
What sign is seen when the head is delivered but then retracts back into the vagina?
What are the 2 initial management options to deliver the anterior shoulder?
Pubic symphysis
Turtle-neck sign
- *Episiotomy** (cutting the perineum to make the vaginal opening larger)
- *McRoberts Manoeuvre** (mothers knee’s to abdomen - this provides posterior tilt to pelvis, lifting pubic symphysis out of way)
What 5 factors are assessed using the Bishop Score for induction of labour?
Fetal station (this is how far down into the pelvis the babies head is palpated in relation to the ischial spines)
Cervical position (as the cervix ripens, it moves more anteirorly)
Cervical dilatation (as the cervix ripens, it dilates)
Cervical effacement (as the cervix ripens, it becomes shorter)
Cervical consistency (as the cervix ripens, it becomes softer)
How is a patient mean’t to use Entonox?
~ how long does it take for it to work?
Entonox = gas & air (NO)
~ breathe it in at the start of a contraction
~ takes about 30s to work
What is the 1st line management of pre-eclampsia?
Labetolol (anti-hypertensive)
Name the antibiotic used to treat Gonorrhoea?
What is the dose of this & what route is it given?
Ceftriaxone 1g, given IM
Women with a RF for gestational diabetes are investigated for gestational diabetes at what gestational week?
How is this investigated?
What additional investigation are women with a history of gestational diabetes given?
Week 24-28
OGTT
Women with a history of GD are given an OGTT at their booking appointment (~10 weeks) - if this is normal, it is repeated at weeks 24-28
What is placental abruption? - name the 2 types
List some clinical features seen in placental abruption: (4)
What is the management of placental abruption if:
- maternal +/- foetal compromise
- no maternal/ foetal compromise
Premature separation of the placenta from uterus during pregnancy
~ Concealed & revealed
- Woody, hard uterus
- Sudden onset, severe abdominal pain
- Vaginal bleeding (may be disproportionate to observations though)
- Fetal distress on CTG (bradycardia/ reduced foetal movements)
-
1. Emergency C-section*
2. Conservative management with CTG & maternal monitoring
What is the medical management of a miscarriage? - how does it work?
What is the surgical management of a miscarriage?
- *Misoprostol
- ** prostaglandin analogue (softens the cervix & stimulates uterine contractions to expel the miscarriage)
- *Surgical management:**
- *-** vacuum aspiration & curettage (products are sucked & scooped out) → misoprostol is given before procedure to soften the cervix
What is the medical management of an ectopic pregnancy? - how long after treatment is it advised to avoid pregnancy?
What are the 2 surgical options of ectopic termination?
~ which one is 1st/ 2nd line
- *Medical:**
- Methotrexate IM* - avoid pregnancy for 3 months due to teratogenic effects!
Surgical:
1st line:Laparoscopic salpingEctomy
~ removal of whole affected fallopian tube
2nd line: Laparoscopic salpingOtomy
~ removal of only ectopic, fallopian tube is left
What timeframe does postnatal depression occur within?
Within 6 months of giving birth
Describe the rule of 3’s for management of prolonged foetal bradycardia:
- *3 mins:** call for help
- *6 mins:** move to theatre
- *9 mins:** prepare for delivery of the baby
- *12 mins:** deliver the baby (by 15 mins!)
Describe the discharge associated with each condition below:
1) Bacterial vaginosis
2) Candidiasis
3) Chlamydia
4) Gonorrhoea
5) Trichomoniasis
1) Watery, FISHY discharge
2) Thick, white discharge (cottage cheese)
3) Watery, odourless discharge
4) Yellow discharge
5) Frothy, green discharge
What is the Bishop Score used to assess?
It assess whether someone should have their labour induced
What are the typical triad of features seen in pre-eclampsia?
Hypertension that occurs after 20 weeks gestation
Proteinuria
Oedema (usually ankle)
Explain the pathology in each miscarriage & say whether miscarriage is certain or not:
a) Threatened miscarriage
b) Inevitable miscarriage
c) Complete miscarriage
d) Missed miscarriage
a) Threatened miscarriage:
Mild bleeding, mild/ no pain, cervical os is closed, foetus present intrauterine - Miscarriage may or may not occurr
b) Inevitable miscarriage:
Heavy bleeding, pain, cevical os is open, foetus currently present intrauterine - Miscarriage is inevitable
c) Complete miscarriage
+/- bleeding/ pain, cevical os closed, NO products of conception intrauterine anymore (all have been expelled) - Miscarriage has already occurred
d) Missed miscarriage
Asymptomatic, cevical os closed, foetus currently present intrauterine but is dead
What is an episiotomy?
Episiotomy: a cut is made in the perineum to avoid perineal tears during labour
Describe the damage involved in each degree of perineal tears:
~ First degree tear
~ Second degree tear
~ Third degree tear: 3A, 3B, 3C
~ Fourth degree tear
What is the management of the various tears?
First degree: Tear limited to the superficial perineal skin or vaginal mucosa only
~ Don’t require treatment
Second degree: Tear extends to perineal muscles and fascia, but the anal sphincter is intact
~ Requires a simple stitch (midwife can do this)
- *Third degree:** tear involves the external anal sphincter
- *3A** - less than 50% thickeness of sphincter is torn
- *3B** - more than 50% thickeness of sphincter is torn
- *3C** - External & internal anal sphincters torn
- ~ Requires surgical correction*
- *Fourth degree:** tear extends to the rectal mucosa
- ~ Requires surgical correction*
P, C, R
Name 3 medications that affect the efficacy of the COCP:
- Phenytoin
- Carbamazepine
- Rifampicin
List the 4 signs of labour:
What drug is the 1st line for tocolysis?
~ what is tocolysis?
- Show (mucus plug from the cervix)
- Rupture of membranes
- Regular, painful contractions
- Dilation of cervix (seen on examination)
Nifedipine (orally)
~ the use of medications to stop uterine contractions
What investigations should you do to diagnose PID? (5)
Pelvic examination
Pregnancy test (to rule out ectopic)
STI swabs
Transvaginal ultrasound
Bloods
What is the management of PID?
Antibiotics: ofloxacin & metronidazole
Analgesia if severe pain
What are the 5 things that a CTG measures?
What is the normal HR of a fetus?
~ what is the range of normal variability within this?
- Contractions (num. of uterine contractions in 10 mins)
- Baseline fetal HR (the average HR)
- Variability (of fetal HR)
- Accelerations (increase in HR of 15bpm for 15 secs)
- Decelerations (decrease in HR by 15bpm for 15 secs) - concerning
Foetal HR = 110 - 160bpm
~ normal variability = 5 - 25bpm
Name the 3 types of emergency contraception available and:
a) state the timeframe in which they are effective after UPSI
b) state their mechanism of action against pregnancy
List 2 contraindictations of EllaOne
- *EllaOne**
a) effective up to 5 days after UPSI
b) delays ovulation
c) asthma, breastfeeding should be avoided for 1 week - *IUD (copper coil)**
a) effective up to 5 days after UPSI
b) copper is spermicidal + prevents implantation
c) insertion may cause PID - *Levonorgestrel**
a) effective up to 3 days after UPSI
b) delays ovulation
If a woman still has a uterus, what type of HRT should she be offered?
Oestrogren + progesterone
Name the 2 most common types of urinary incontinence:
Urge & Stress incontinence
What symptoms might PID present with? (5)
Bilateral abdominal pain
Vaginal discharge
Post coital bleeding
Fever
Adnexal tenderness
What muscle helps to maintain continence?
Pelvic floor (pelvic diaphragm)
List some extrinsic causes of urinary incontinence: (5)
- Immobility issues - unable to get to toilet
- Diuretics - increase volume of urine
- Constipation
- Confusion - may be unaware of needing toilet
- Painkillers - can cause constipation
List some risk factors for urinary incontinence: (6)
- High parity / previous vaginal deliveries
- High BMI
- Pelvic organ prolapse
- Previous pelvic floor surgery (eg perineal tear repair)
- Increased age
- Neurological conditions, eg dementia, MS
What 2 antibiotics are used to treat a Chlamydia infection?
Doxycycline & Azithromycin
State some risk factors for uterine rupture: (3)
List some common clinical features of uterine rupture: (5)
What is the management of uterine rupture?
Risk factors of uterine rupture:
• VBAC (vaginal birth after C-section - C-section scar is a weak point in the uterus!)
• The use of oxytocin to stimulate contractions
• High BMI
Clinical features:
• Sudden abdominal pain
• Vaginal bleeding
• Maternal shock (hypotension, tachycardia, collapse)
• Ceasing of uterine contractions
• ABNORMAL CTG
Management: EMERGENCY C-SECTION
If the CTG is showing signs of fetal distress, what can you do to determine whether the baby is hypoxic?
How is this done?
Take a fetal blood sample
Speculum is inserted and babies head is ‘scratched’ to obtain a blood sample ⇒ ONLY shows if baby is hypoxic
Name the muscles that form the pelvic floor:
Levator ani:
~ Puborectalis
~ Pubococcygeus
~ Iliococcygeus
Coccygeus (also known as ischiococcygeus)
If needing treatment, what is used to treat Bacterial Vaginosis?
What is the treatment of Candidiasis infection?
What is the treatment of Chlamydia infection? (In non pregnant/ breastfeeding people)
What is the treatment of Gonorrhoea infection?
What is the treatment of Trichomoniasis infection?
What is the treatment of Herpes infection?
Bacterial vaginosis: Metronidazole
Candidiasis: Antifungal cream/ pessary (clotrimazole)/ oral tablet
Chlamydia: doxycycline 100mg 2x daily for 7 days
Gonorrhoea: IM ceftriaxone (if sensitivities are known) / oral ciprofloxacin (if sensitivities aren’t known)
Trichomoniasis: Metronidazole
Herpes: Aciclovir
If a pregnant woman is HIV positive, is she able to have a normal vaginal delivery?
If a pregnant woman is HIV positive, is she able to breastfeed?
What prophylaxis treatment is given to all babies born to HIV+ women?
Vaginal delivery: ONLY if her viral load is undetectable (< 50 copies/ ml) - otherwise C-section recommended
Breastfeeding: NO. Even if viral load is undetectable, HIV can be transmitted to baby through the breast milk!
Prophylaxis:
• Viral load is undetectable (< 50 copies/ ml) = 1x antiviral for 4 weeks
• Viral load is detectable (> 50 copies/ ml) = 3x antiviral for 4 weeks
What is the commonest cause of post partum haemorrhage?
What are the other causes of PPH? (the 4 T’s)
Atony of the uterus (failure of the uterus to contract)
→ Tone (atony of the uterus)
→ Tissue (retained placenta)
→ Trauma
→ Thrombosis
A 44y woman attends the GP practice complaining of a 6y history of abdominal pain and menorrhagia. She describes the pain as being worse immediately before and during the first day of menstration. O/E the uterosacral ligament is thickened and the ovaries are enlarged. Laparscopic examination reveals chocolate cysts.
What is the likely diagnosis?
Endometriosis
Where is the commonest anatomical site to find an implanted ectopic pregnancy?
Ampulla
Between which weeks does labour & delivery usually occur?
37 - 42 weeks
What is the peri-menopause?
The period of time from when symptoms of the menopause start, until 12 months after the last menstrual period
When palpating the anterior & posterior fonatelles on vaginal examination during delivery, what shapes do they typically have?
- *Anterior fontanelle:** diamond
- *Posterior fontanelle:** triangle
What antibiotic is used to treat Bacterial Vaginosis?
Metronidazole
A 48y old woman presents with intense ithcing in the perineal area, associated with pain on micturation and dyspareunia.
O/E you notcie white polygonal papules on the labia majora, coalescing into a patch affecting the labia minora. There is one fissuring area, which bleeds on contact. The skin is white, thin & shiny. Mild scarring is noted. There is no vaginal discharge.
What is the likely diagnosis:
a) Lichen Planus
b) Lichen Sclerosus
What is the 1st line treatment for this condition?
LICHEN SCLEROSUS
3 month trial of topical steroids
List some adverse effects of an epidural: (5)
What 2 simple analgesics are commonly given in labour alongside the additional pain relief options?
~ which simple analgesic is avoided?
- Increased risk of instrumental delivery
- Prolonged 2nd stage of labour
- Hypotension
- Motor weakness in legs (cannot walk around after)
- Headache (after insertion - uncommon)
Paracetemol & codeine
~ NSAIDs are avoided!!
Is a ductal carcinoma in-situ (DCIS) an invasive/non-invasive form or breast cancer?
Non-invasive