Women's & Reproductive Health Flashcards
What are the diagnostic criteria for gestational diabetes?
Either:
- Fasting plasma glucose of 5.6 mmol/litre or above; or
- 2-hour plasma glucose of 7.8 mmol/litre or above
What are the recommended target plasma glucose levels for gestational diabetes?
- 5.3 mmol/litre for fasting
- 7.8 mmol/litre 1 hour after meals
- 6.4 mmol/litre for 2 hours after meals
Target HbA1C < 48 mmol/mol (6.5%), albeit in pregnancy it is not as useful in monitoring control.
What are the diagnostic criteria for hyperemesis gravidarum?
Diagnostic triad:
- 5% pre-pregnancy weight loss
- Dehydration
- Electrolyte imbalance
What is the differential diagnosis for vaginal discharge?
Infective
- Sexually transmitted: trichomonas, chlamydia, gonorrhea
- Non-sexually transmitted: candida, bacterial vaginosis
Physiological
- Pregnancy
- Ovulation
Cervical ectropion
What are the clinical and diagnostic features of bacterial vaginosis?
- 50% asymptomatic
- Thin, grey discharge with strong fishy odour
- Doesn’t usually cause soreness or itching
- Vaginal PH of > 4.5
- Clue cells on microscopy
How do you manage bacterial vaginosis?
Asymptomatic and not pregnant: treatment not required
Symptomatic or pregnant: oral metronidazole twice a day for 5 to 7 days
General advice:
- Avoid douching and other products targetting BV
- Avoid perfumed soaps, shower gels, and shampoo
Why should all pregnant women be treated for BV?
BV in pregnancy is associated with:
- Late miscarriage
- Preterm birth
- Premature rupture of membranes
- Postpartum endometriosis
What are the causes of postpartum haemorrhage?
The four Ts:
Tone
Tissue
Trauma - genital tract injury
Thrombin - coagulation abnormalities
Risk factors for postpartum haemorrhage?
Tone
- Polyhydramnios, multiple gestation, macrosomnia, fibroids, placenta praevia, uterine abnormalities, prolonged labour, prolonged rupture of membranes
Trauma - genital tract injury
- Operative delivery, previous uterine surgery, implementation (e.g forceps delivery).
Thrombin - coagulation abnormalities
- History of PPH, haemophilia A, Von Willebrand’s disease, idiopathic thrombocytopenic purpura, HELLP, gestational thrombocytopenia, DIC
How do you manage a major obstetric haemorrhage?
Call for help!
Resuscitation
- Airway
- Breathing - oxygen mask (15L)
- Circulation
- Bed head down
- x2 wide-bore IV cannulae
- FBC, coagulation, U&Es, LFTs, cross-match (4 units)
- IV fluids (Hartmann’s or saline)
- Consider blood transfusion (O RhD-negative or group-specific blood)
- Consider blood products (FFP, PLT, factor VII)
- Foley catheter (to empty bladder and monitor fluid output)
Medical treatment
- Bimanual compression
- Oxytocin 5 iu, slow IV
- Ergometrine o.5 mg, slow IV
- Oxytocin infusion (40 iu in 500 ml)
- Carboprost 0.25 mg IM every 15 min up to 8 times
- Misoprostol 800 micrograms subligually
- Consider tranexamic acid 1 g IV
Theatre
- Intrauterine balloon tamponade
- Brace suture
- Consider stepwise uterine devascularisation (requires interventional radiologist)
- Bilateral internal artery ligation
- Hysterectomy
What are the risks of being overweight or obese in pregnancy?
Risks to mother
- Miscarriage
- Gestational diabetes
- Gestational hypertension and pre-eclampsia
- Venous thromboembolism (DVT and PE)
- Macrosomia and shoulder dystocia
- Post-partum haemorrhage
- Instrumental delivery or emergency caesarean section
Risks to baby
- Prematurity
- Stillbirth
- Birth injury
- Congenital abnormality
Who is at risk of gestational diabetes?
Women who:
- are overweight or obese
- have had gestational diabetes before (80% recurrence rate)
- have had a very large baby in a previous pregnancy (4.5kg/10lb or over)
- have first degree relative with diabetes
- are from a South Asian, Black or African Caribbean or Middle Eastern background
Summarise the antenatal care for uncomplicated primiparous and multiparous women.
Booking appointment (ideally by 10 weeks)
16 weeks - review screening tests
18 - 20 weeks - anomoly scan
- 25 weeks - (nulliparous woman)
28 weeks - offer second screening for Hb and antibodies, gestational diabetes and anti-D if Rh neg
- 31 weeks (nulliparous woman)
34 weeks - offer a second dose of ani-D if Rh neg
36 weeks - check position of baby, offer ECV if breech
38 weeks
- 40 weeks (nulliparous woman)
41 weeks - membrane sweep, offer IOL
At each appointment, measure blood pressure, test urine for proteinuria, and measure and plot symphysis-fundal height.
When do we screen for Down’s syndrome?
What are the screening tests?
Ideally by the end of the first trimester (13 weeks 6 days)
The combined test
- Nuchal translucency
- Beta-human chorionic gonadotrophin
- Pregnancy-associated plasma protein-A
- Between 11 weeks and 13 weeks 6 days
The triple or quadruple test
- Beta-human chorionic gonadotrophin
- Alpha-fetoprotein
- Oestriol (E3)
- Inhibin A
- Between 14 weeks and 20 weeks
NB. The presence of an increased nuchal fold (6 mm or above) or two or more soft markers should prompt the offer of a referral to a fetal medicine specialist.
What two diagnostic tests are offered following a higher-chance result for Down’s syndrome?
- Amniocentesis
- Chorionic villus sampling
This will tell you for certain whether or not the baby has Down’s, Edwards’ or Patau’s syndrome.
What are the risk factors for pre-eclampsia?
- Age 40 years or older
- Nulliparity
- Pregnancy interval of more than 10 years
- Family history of pre-eclampsia
- Previous history of pre-eclampsia
- BMI 30 kg/m2 or above
- Pre-existing hypertension
- Pre-existing renal disease
- Multiple pregnancy
- Diabetes
What are the symptoms of pre-eclampsia?
- Severe headache
- Problems with vision, such as blurring or flashing before the eyes
- Severe pain just below the ribs
- Vomiting
- Sudden swelling of the face, hands or feet
What are the diagnostic criteria for pre-eclampsia?
- Blood pressure ≥ 140 mm Hg systolic or ≥ 90 mm Hg diastolic on two separate readings taken at least four to six hours apart after 20 weeks gestation
(In a woman with essential hypertension beginning before 20 weeks gestational age: an increase in systolic blood pressure of ≥30mmHg or an increase in diastolic blood pressure of ≥15mmHg)
- Proteinuria ≥ 300 mg or more of protein in a 24-hour urine sample or a SPOT urinary protein to creatinine ratio ≥ 0.3 or a urine dipstick reading of 1+ or greater
How can women prevent pre-eclampsia?
Take low-dose aspirin
How do you manage pre-eclampsia?
Definitive treatment is delivery
- Expectant management to expedited delivery by induction of labour or caesarian section
In severe hypertension, reduce blood pressure
- Labetolol, Methyldopa and Nifedipine
In severe pre-eclampsia, prevent eclampsia
- Magnesium sulphate
What is the screening pathway for placenta praevia?
Most low-lying placentas detected at the routine anomaly scan will have resolved by the time the baby is born.
Only a woman whose placenta extends over the internal cervical os should be offered another transabdominal scan at 32 weeks.
If the transabdominal scan is unclear, a transvaginal scan should be offered.
Which infections are routinely screened for in pregnancy?
- Hepatitis B virus
- HIV
- Rubella
- Syphilis
Which haemoglobinopathies are routinely screened for in pregnancy?
Sickle cell diseases
Thalassaemias
When is routine antenatal anti-D prophylaxis (RAADP) given?
One or two doses at 28 weeks +/- 34 weeks