Obs and Gynae Flashcards
(114 cards)
What dose folic acid should be taken during pregnancy and when should it be taken?
400 micrograms, 5 mg for those more at risk for neural tube defects (e.g., diabetics).
2 months prior to conception until 12 weeks post conception.
At what point do you investigate couples for infertility? What is the first line investigation?
After 12 months of regular, unprotected sex without successful conception.
Mid-luteal phase progesterone and semen analysis.
What is ovarian hyperstimulation syndrome?
Complication of IVF, exaggerated response to excessive hormones.
Ovaries swell and become painful causing abdo pain, you also get systemic symptoms such as nausea, vomiting, diarrhoea, and bloating.
How would you confirm a pregnancy <5 weeks? Can you get an USS?
Measure bHCG and then retest 48 hours later, it should double in this time.
Intrauterine pregnancies are visible from around 5 weeks onwards so may not be visible.
How doe you diagnose gestational diabetes?
Fasting plasma glucose >5.6mmol/L or 2 hour post OGTT >7.8mmol/L.
Best performed around 24-28 weeks.
How do you manage gestational diabetes?
If fasting glucose is <7mmol/L: metformin and lifestyle modifications.
If >7mmol/L: insulin injections OD in morning and lifestyle measures.
How do you define gestational hypertension?
30mmHg rise from booking bloods without evidence of proteinuria.
What is first line for gestational hypertension? What if they are asthmatic?
labetalol (nifedipine if asthmatic).
What is the commenst cause of hyperthyroidism in pregnancy? Mx?
Cause - Grave’s
Mx - PTU (propylthiouracil).
What is Placenta praevia? When is it seen/when does it present?
Placenta sitting in the lower region of the uterus.
Can be seen from around 16-20 weeks on USS but may present with PAILNESS bright red bleeding.
What are the stages of placenta praevia?
1: placenta does not reach internal os but is lying low.
2: placenta reaches margin of os but does not cover it.
3: placenta covers os when undilated but not when dilated.
4: Placenta completeely covers os.
How should a symptomatic placenta praevia >34 weeks be managed?
NOT SAFE TO DISCHARGE
Only definitive management is delivery - C-section.
What are the RFs for intrauterine growth restriction?
Smoking, alcohol use, low maternal BMI, infection, multip pregnancy, chromosomal defects. poly/oligohydramnios
How is hyperemesis gravidum defined?
loss of 5% of pre-pregnancy body weight despite anti-emetic treatment OR ketonuria.
How is hyperemesis gravidum managed?
Antihistamine anti-emetic (promethazine).
Monitoring/correction of electrolytes.
Rehydration.
When should rhesus -ve mums be given anti-D to prevent allo-immunisation?
One dose between 28 and 30 weeks or two doses at 28 and 34 weeks and after any foetal maternal haemorrhage.
What is the Kleihauer test?
Determines how many foetal cells are in maternal circulation after a foetal-maternal haemorrhage. This informs how much anti-D to give.
What are the potential complications of bacterial vaginosis in pregnancy? How is it managed?
Increases risk of low birthweight and premature birth.
Give PV metronidazole and monitor pt.
What are the stages/forms of placental/villous implantation?
1) Placenta accreta: placenta attaches to nitanuch layer but not the myometrium itself.
2) Placenta Increta: placenta invades myometrium
3) Placenta percreta: villous invasion all the way through the myometrium and can reach other structures such as the bladder.
How should abnormal placental implantation be managed?
Delivery via c-section and hysterectomy is the safest option but can try to preserve fertility with a less radical approach.
How does acute fatty liver of pregnancy usually present?
Nulliparous women in 3rd trimester with abdo pain, vomiting, nausea, anorexia, and jaundice.
What biochemistry results come back for a women with an acute fatty liver of pregnancy?
Coagulopathy: low platelets, prolonged PT.
Raised AST, ALT, bilirubin, ammonia, creatinine, lactate and serum uric acid.
How do you manage an acute fatty liver of pregnancy?
Delivery of foetus and post-partum support.
How does intrahepatic cholestasis of pregnancy present? What is seen on biochemistry?
Usually in the 3rd trimester: pruritis, excoriation marks, abdo pain, malaise/fatigue, jaundice, GI sx.
Raised bili on biochemistry.