Obstetrics and Gynaecology Flashcards
A nervous 42-year-old woman presents herself to your antenatal clinic very worried that she has missed the right time to have her combined test for Down’s syndrome screening. She is now 17 weeks pregnant, and is very concerned about her age. You counsel her about the appropriate alternative, the quadruple test and arrange to have this done. What assays make up the quadruple test?
a) AFP, PAPP-A, inhibin B, and beta hCG
b) Unconjugated oestradiol, hCG, AFP, and inhibin A
c) Beta hCG, PAPP-A, nuchal translucency, and inhibin A
d) AFP, inhibin B, beta hCG, and oestradiol
e) Unconjugated oestradiol, PAPP-A, beta hCG, and inhibin A
B
10-13 weeks:
Nuchal translucency
PAPP-A
beta-hCG
14-20 weeks: Unconjugated oestradiol Total hCG AFP Inhibin A
Integrated test uses the combined test and the quadruple test.
A 33-year-old nulliparous woman is 29 weeks pregnant. She was referred to the rapid access breast clinic for investigation of a solitary breast lump. Sadly, a biopsy of this lump revealed a carcinoma. After much counselling from the oncologists and her obstetricians a decision is reached on her further treatment. What option below may be available to her?
a) Tamoxifen
b) Computed tomography (CT) of the abdomen-pelvis
c) Radiography
d) Chemotherapy
e) Bone isotope scan to look for metastases in order to stage the disease
D
Chemotherapy is teratogenic in the first trimester but safer in the mid and third trimesters. Birth should be 2-3wks after most recent session to allow bone marrow regeneration.
Tamoxifen is teratogenic in pregnancy and breastfeeding.
Radiotherapy is contraindicated in pregnancy unless life-saving.
CT and bone isotope scans wouldn’t be clinically useful enough to warrant the dose of radiation.
A 38-year-old woman with type 2 diabetes attends the maternal medicine clinic. She has a body mass index (BMI) of 48 and is currently controlling her sugars with insulin. You have a long discussion about her weight. What should not be routinely offered to this woman?
a) Post-natal thromboprophylaxis
b) Vitamin C 10mg once a day
c) Regular screening for pre-eclampsia
d) Referral to an obstetric anaesthetist
e) An active third stage of labour as increased risk of postpartum haemorrhage
B
Obesity is a risk factor for maternal death, failed regional anaesthesia, and postpartum haemorrhage.
In pregnant women with a BMI >30kg/m^2:
Offer mechanical and pharmaceutical thromboprophylaxis
Offer screening for diabetes
Give Vitamin D 10mg once a day
Offer an antenatal anaesthetic review
Actively managed the third stage of labour with syntometrine and controlled cord traction.
A nulliparous woman is seen at the antenatal clinic 27 weeks into her first pregnancy. Routine screening with a 75g oral glucose tolerance test for gestational diabetes mellitus (GDM) is performed. Which of the following would confirm a diagnosis of GDM?
a) Fasting plasma venous glucose of greater than 5.0μmol/L.
b) 2-hour plasma venous glucose of greater than 7.8μmol/L.
c) Random plasma venous glucose of greater than 4.8μmol/L.
d) 2-hour plasma venous glucose of greater than 7.0μmol/L.
e) 2-hour plasma venous glucose of less than 7.8μmol/L.
B
2-5% pregnancies in the UK are complicated by diabetes, and 85% are GDM.
Risk factors include: High BMI Previous macrocosmic baby Previous GDM Family history of diabetes Ethnicity
A 75g OGTT is offered to at risk women, and a 2-hour plasma venous glucose of greater than 7.8μmol/L confirms GDM.
A 29-year-old woman is seen at her booking visit and has blood taken for screening. Which of these is the most appropriate set of booking tests?
a) Hepatitis C, HIV, syphilis, and toxoplasmosis
b) Rubella, hepatitis B, hepatitis C, and syphilis
c) Syphilis, rubella, hepatitis B, and HIV
d) HIV, CMV, rubella, and hepatitis B
e) HIV, syphilis, rubella, and group B Streptococcus
C
CMV, toxoplasmosis, and hepatitis C are not cost effective to screen for.
A 34-year-old woman attends antenatal clinic for a routine ultrasound scan. Abnormalities of placentation are detected and an MRI scan is organised by the foetal medicine consultant. The MRI report shows: ‘The placenta is in the lower anterior uterine wall with evidence of invasion to the posterior wall of the bladder’. What is the most likely diagnosis?
a) Placenta accreta
b) Placenta percreta
c) Placenta increta
d) Placenta praevia
e) Ectopic pregnancy
B
Placenta accreta is firm adhesion of the placenta to the uterine wall without extending through the full myometrium.
Placenta increta extends through the full myometrium.
Placenta percreta extends through and beyond the myometrium, e.g. into the bladder.
Risk factors of the above include uterine scar tissue, for example after uterine cavity surgery.
Placenta praevia attaches to the uterine wall close to the cervical opening.
A 30-year-old nulliparous woman is 29 weeks pregnant. She presented to hospital with a history of a minor, unprovoked painless vaginal bleed of about a teaspoonful. Her anomaly scan at 20 weeks showed a low-lying placenta. Her foetus is moving well and CTG is reassuring. What is the most appropriate management.
a) Allow home since the bleed is small
b) Admit and give steroids
c) Admit, IV access, observe bleed-free for 48h before discharge
d) Admit, IV access, Group and Save and administer steroids if bleeds more.
e) Group and Save, FBC, and allow home; review in clinic in a week
D
Antenatal bleeding is common. The most dangerous reasons are placental abruption and placenta praevia.
Abruptions tend to be painful, and this woman has placenta praevia.
Small bleeds can precede larger bleeds so she should be admitted. Steroids tend to be given only if haemodynamically unstable. There is no need to observe for 48h due to the risk of VTE and nosocomial infections.
A 28-year-old pregnant woman attends accident and emergency with a history of clear vaginal loss. She is 18 weeks pregnant and so far has had no problems. Her past medical history includes a large cone biopsy of the cervix and she is allergic to penicillin. She is worried because the fluid continues to come and there is now some blood. On examination it is apparent that her membranes have ruptured. What is the most appropriate initial management.
a) Discharge, USS the next day
b) Offer her a termination as it is not possible for this pregnancy to continue
c) Admit, infection markers, USS, and steroids
d) USS, infection markers, and observation
e) Discharge and explain that she will probably miscarry at home
D
Rupture of membranes this early almost always ends in miscarriage, and large cone biopsy of the cervix is a risk factor for second trimester miscarriage.
She should be admitted, observed, and investigated for infections. The biggest concern is risk of ascending infection, chorioamnionitis, and sepsis from PROM.
In the case of sepsis, induction is required, but as the gestation is under <24wks, steroids for foetal lung maturity are not indicated. She may spontaneously miscarry, or get to 24wks, when steroids and premature delivery may be considered.
PPROM management involves a 10d course of Abx prophylaxis against chorioamnionitis and steroids to aid lung maturation before the 34th week, delivering between 34 and 36 weeks.
A 37-year-old woman in her fourth ongoing pregnancy presents to the labour ward at 34 weeks’ gestation complaining of a sharp pain in her chest, worse on inspiration. An ABG shows: pH 7.51, PO2 8.0kPa, PCO2 4.61kPa, BE 0.9. What is the most appropriate investigation?
a) CTPA
b) MRI
c) D-dimer
d) V/Q scintigraphy
e) USS
D
She likely has a PE, so needs urgent definitive diagnosis. CTPA or V/Q scans will provide this. V/Q scans have a lower radiation dose so are preferred.
A 32-year-old woman in her second pregnancy presents at 36 weeks gestation with a history of a passing gush of blood stained fluid from the vagina an hour ago, followed by a constant trickle since. The admitting obstetrician reviews her history and weekly antenatal ultrasound scans have shown a placenta praevia. She has a firm, posterior cervix, and has not been experiencing any contractions. What is the most appropriate management?
a) Induction of labour with a synthetic oxytocin drip
b) Cervical ripening with prostaglandins followed by a synthetic oxytocin drip
c) Digital examination to assess the position of the foetus
d) Monitor for 24 hours and manage as for preterm pre-labour rupture of membranes
e) Caesarean delivery
E
This is PPROM with placenta praevia, so vaginal delivery is not an option. Digital examinations are contraindicated with antepartum haemorrhage.
Option D involves a 10d course of Abx prophylaxis against chorioamnionitis and steroids to aid lung maturation before the 34th week, delivering between 34 and 36 weeks. As this woman is 36 weeks pregnant, delivery must be expedited with a caesarean section.
Maternal physiology changes throughout the pregnancy to cope with the additional demands of carrying a foetus. Which of the following changes best represents a normal pregnancy?
a) Stroke volume increases by 10% by the start of the third trimester
b) Plasma volume increases disproportionately to the change in red cell mass creating a relative anaemia
c) Plasma levels of fibrinogen fall, reaching a trough in the mid-trimester
d) Systemic arterial pressure rises to 10mmHg above the baseline by term
e) Aortocaval compression reduces venous return to the heart, in turn increasing pulmonary and arterial pressure
B
Stroke volume increases from the first trimester to over 30% higher by the third trimester.
Plasma fibrinogen, and factors VII, X, and XII, increase throughout pregnancy.
Systemic and pulmonary arterial pressures do not alter.
Aortocaval compression does occur, but does not affect pulmonary circulation.
A 30-year-old woman attends the antenatal clinic asking to be sterilised at the time of her elective caesarean. She is 34 weeks into her second pregnancy having had her first child 2 years ago via an emergency caesarean section. She is not sure that she wants any more children. Further more, she does not wish to try for a vaginal birth. She has tried the contraceptive pill in the past but does not like the side effects. You talk to her about other options, including the sterilisation she is requesting. What is the best management option for this woman?
a) Mirena coil
b) Sterilisation at the time of her caesarean section
c) T380 coil
d) Implanon
e) Vasectomy
C
As she is ‘not sure that she wants any more children’, sterilisation is not the best option.
She doesn’t like the side effects of hormonal contraception, so Mirena coil and Implanon are not applicable.
Vasectomy requires her partner to make a decision, and is also not applicable in this situation.
A 41-year-old multipara attends the antenatal clinic at 36 weeks gestation complaining of lower abdominal cramps and fatigue when mobilising. Clinical examination is unremarkable save for a grade 1 pan systolic murmur, loudest over the fourth intercostal space in the midaxillary line. What is the most appropriate management?
a) Urgent outpatient echocardiogram and referral to a maternal-foetal medicine consultant
b) Reassurance and a 38-week antenatal clinic follow-up
c) Admission and work-up for cardiomyopathy
d) Post-natal referral to a cardiologist
e) Admission to the labour ward for induction of labour
B
The described murmur is mild tricuspid regurgitation, which is physiological in pregnancy.
Lower abdominal cramps and fatigue are also common symptoms in pregnancy.
A 32-year-old HIV positive woman who booked for antenatal care at 28 weeks gestation arrives on the delivery suite at 37 weeks with painful regular contractions and a cervix dilated to 4cm. Ultrasonography confirms a breech singleton pregnancy with a reactive foetal heart rate.
a) Await onset of labour, avoid operative delivery, wash the baby at delivery
b) Induce labour with synthetic prostaglandins
c) Await onset of labour, but have a low threshold for expediting vaginal delivery using forceps
d) Await onset of labour, avoid operative delivery, administer steroids to the infant immediately after birth
e) Caesarean delivery, wash the baby at delivery
E
As this lady is not in established labour, and has a breech singleton pregnancy, a caesarean delivery has the best foetal outcome.
In HIV positive women, washing of the baby after delivery can reduce risk of vertical transmission, but does not change the choice for caesarean section delivery.
A 41-year-old multiparous woman attends A&E at 32 weeks gestation complaining of sudden onset shortness of breath. A CTPA demonstrates a large saddle embolus. What is the most appropriate treatment regimen?
a) Load with warfarin to achieve a target INR of 3.0
b) Load with warfarin to achieve a target INR of 2.5
c) Load with warfarin to achieve a target INR of 20
d) 80mg enoxaparin twice daily
e) 7.5mg fondaparinux once daily
D
Warfarin is teratogenic in all trimesters but in different ways depending on gestational age.
Enoxaparin and fondaparinux are both indicated in PE treatment, but efficacy and safety of fondaparinux in pregnancy is not supported by evidence, whereas enoxaparin is.
A 21-year-old woman attends the labour ward with per vaginal bleeding of 100mL. She is 32 weeks pregnant and has had one normal delivery in the past. An important history to note is that of an antepartum haemorrhage in her last pregnancy, and she smokes 10 cigarettes a day. Her 20-week anomaly ultrasound revealed a posterior fundal placenta. She admits she and her partner had intercourse last night and is concerned by terrible abdominal pains. What is the most likely diagnosis?
a) Vasa praevia
b) Placenta praevia
c) Placenta accreta
d) Placental abruption
e) Cervical ectropion
D
Painful antenatal haemorrhage is a worrying symptom of placental abruption. Abruption is life threatening to mother and child.
Placenta accreta is firm adhesion of the placenta to the uterine wall without extending through the full myometrium. Placenta increta extends through the full myometrium. Placenta percreta extends through and beyond the myometrium. Risk is increased in intrauterine scarring.
Placenta praevia attaches to the uterine wall close to the cervical opening, and is characteristically a painless bleed.
Vasa praevia is a rare painless bleed on ROM, associated with sudden foetal compromise and often intrauterine death.
Cervical ectropion is a normal phenomonen and causes painless vaginal bleeding.
At a booking visit, a first time mother is told that she is rhesus negative. Which of these answers is the most appropriate advice for the mother?
a) It is important to have anti-D as it will make sure your baby does not develop antibodies
b) If you have any bleeding before 12 weeks be sure to get an injection of anti-D
c) Anti-D will stop your body creating antibodies to your baby’s blood that may help protect the health of your next child
d) If your partner is rhesus negative you do not need to have anti-D
e) You need one injection that will cover your pregnancy even if you have episodes of vaginal bleeding
C
Foeto-maternal transfer of blood in Rh- mothers of Rh+ babies causes maternal sensitisation with production of anti-D antibodies.
Subsequent Rh+ babies’ RBCs will be attacked by the maternal anti-D antibodies, causing haemolytic anaemia.
1500IU of anti-D is given at 28wks, with further doses in the case of sensitising events such as vaginal bleeding, abdominal trauma, or ECV.
Rh- fathers would indicate a Rh- baby, but as many 1 in 10 partners are not the real fathers, so it can’t be assumed.
A 42-year-old para 4 with a dichorionic-diamniotic twin pregnancy at 31 weeks gestation presents to hospital with a painful per vaginal bleed of 400mL. The bleeding seems to be slowing. She is cardiovascularly stable, although having abdominal pains every 10 minutes. There is still a small active bleed on speculum and the cervix appears closed. Both foetuses have reactive CTGs. She has had no problems antenatally, and her 28-week ultrasound revealed both placentas to be well away from the cervix. What is your preferred management plan?
a) Admit to antenatal ward, ABC, IV access, Group and Save, CTG, steroids, consider expediting delivery
b) Reassure and ask to come back to clinic next week if there are any problems
c) Admit for observation, IV access
d) Admit to labour ward, ABC, IV access, FBC, cross-match 4 units of blood, CTG, steroids, consider expediting delivery
e) As bleeding settled and placenta not low, offer admission but arrange follow-up if refused
D
Painful vaginal bleeding is in keeping with placental abruption, which is a very serious complication.
Admission, ABC, IV access, Group and Save, and CTG should be done to monitor and prepare. 4U of blood should be cross-matched as there is a high risk of blood transfusion required. Steroids should be given to aid foetal lung maturation, and admission should be to the labour ward in order to prepare for emergency delivery.
You are the FY1 covering the antenatal ward. A 27-year-old nulliparous woman who is 36 weeks and 5 days pregnant has been admitted to your ward with suspected pre-eclampsia. The emergency buzzer goes off in her room. You are the first to attend and find your patient flat on the bed having a generalised seizure - what do you do?
a) Call for help, ABC, nasopharyngeal airway, IV access, and wait for fit to stop
b) Call for help, ABC, protect her airway, prepare for grade 1 caesarean section
c) Call for help, ABC, left lateral tilt, wait for seizure to end, listen to foetus
d) Call for help, ABC, left lateral tilt, protect airway, prepare magnesium
e) Call for help, ABC, protect airway, prepare magnesium, check blood pressure
D
This is an eclamptic fit, which is a life-threatening situation.
The left lateral position should be assumed and her airway protected. Additional airway insertion and obtaining IV access is dangerous in an actively fitting woman. Magnesium sulphate is a cerebral membrane stabiliser and must be given ASAP.
The mother, and not the foetus, must be the primary concern, so checking foetal heart before stabilising and monitoring the mother is incorrect.
A 38-year old woman in her first pregnancy is 36 weeks pregnant. She presents to the labour ward feeling dizzy with a mild headache and flashing lights. Her past medical history includes SLE, renal stones, and malaria. Her BP is 158/99 mmHg with 2+ protein in her urine. Her platelets are 55X10^9/L, Hb 10.1 g/dL, bilirubin 62 62 μmol/L, ALT 359 IU/L, urea 2.3mmol/L and creatinine 64 μmol/L. What is the most likely diagnosis?
a) TTP
b) HELLP syndrome
c) ITP
d) SLE
e) HIV
B
TTP is microangiopathic haemolytic anaemia, thrombocytopenia, fever, neurological involvement, and renal impairment.
HELLP is pre-eclampsia with haemolysis, elevated LFTs, and low platelets.
ITP is a diagnosis of exclusion.
SLE and HIV can both cause thrombocytopenia, but are unlikely compared to HELLP.
A 19-year-old woman in her first pregnancy presents to the GUM clinic with an outbreak of primary herpes simplex infection on her labia. She is 33 weeks pregnant. What is the best advice regarding her herpes?
a) Aciclovir from 36 weeks until delivery
b) Caesarean section should be performed if she labours within the next 8 weeks
c) Reassure as the infection will pass and pose no further concern
d) If she labours within 6 weeks, a caesarean should be recommended
e) Aciclovir for 10 days and an elective caesarean at 39 weeks
D
Primary herpes during pregnancy may risk vertical transmission. If the infection is within 6 weeks of the due date, or labour is within 6 weeks, caesarean section is recommended. If refused, IV acyclovir during labour and close postnatal monitoring is used.
A 33-year old woman presents to hospital with a 2-day history of itching on the soles of her feet and the plasma of her hands. Her pregnancy has been straightforward and she has good foetal movements. LFTs reveal an ALT of 64 IU/L and bile acids of 30 μmol/L. You suspect that she might have developed obstetric cholestasis. Which of the following bits of advice is true.
a) She could have intermittent monitoring in labour
b) US and CTG surveillance help prevent stillbirth
c) Poor outcomes can be predicted by bile acid levels
d) UDCA helps prevent stillbirth
e) Meconium stained liquor is more common in labour
E
Obstetric cholestasis is pruritus and deranged LFTs. LFTs should thence be monitored weekly.
The main concern is stillbirth, which cannot be predicted. Preterm labour and meconium stained liquor is more likely. Continuous CTG should be done throughout labour.
UDCA is not licensed but helps itching with no apparent side effects, though it doesn’t help prevent stillbirth.
A 24-year-old woman who is 32 weeks pregnant presents to the labour ward with a terrible headache that has not improved despite analgesia. It started 2 days ago and came on suddenly. She has stayed in bed as it hurts to be in sunlight and she vomited twice this morning. Her past medical history includes a macroprolactinoma (which has been removed) and occasional migraines. She is haemodynamically stable with no focal neurology or papilloedema. You arrange for her to have an emergency head CT, which adds no further information to aid your diagnosis. There are red cells on lumbar puncture, but no organisms are isolated. What is the most likely diagnosis?
a) Migraine
b) Viral meningitis
c) Cerebral vein thrombosis
d) Subarachnoid haemorrhage
e) Idiopathic intracranial hypertension
A
Migraines are most common, particularly in pregnancy, and presents with these symptoms. All the other causes present with the above symptoms, too.
Viral meningitis would also give fever, and neck stiffness.
CVTs classically presents postpartum. 2/3 also have neural deficits.
SAH often has papilloedema, and focal neurology.
IIH is associated with papilloedema in young obese women. It is raised ICP with no hydrocephalus or SOLs.
A 19-year-old woman in her first pregnancy is admitted to the labour ward with a 4-hour history of lower abdominal pain - she is 22 weeks pregnant. She has not had any vaginal bleeding but describes a possible history of rupture of her membranes. Her past medical history includes and appendicectomy and a large cone biopsy of her cervix. On examination she has palpable lower abdominal tenderness, her cervix is 2cm dilated, she has an offensive vaginal discharge and her temperature is 38.9C. Her WCC is 19.0x10^9/L and her CRP is 188 mg/L. There are no signs of cardiovascular compromise. How would you manage this woman?
a) Insert a cervical suture
b) 12 mg betamethasone, atosiban for tocolysis and antibiotics
c) Head down, bed rest, antibiotics, and await events
d) Antibiotics and induce labour
e) Caesarean section
D
This woman is septic, with PROM, offensive vaginal discharge, abdominal pain, fever, and past history of cone biopsy.
She must be treated with antibiotics and, sadly, induction of labour.
Cervical sutures and tocolysis are contraindicated in infection.
The foetus is not viable, so steroids are not indicated.