Obstetric Medicine Flashcards
Congenital Heart Block
Due to neonatal lupus
5% risk with maternal Anti-Ro and Anti-La
Cross placenta and bind to conduction pathways
Renal changes in Pregnancy
Increase renal blood flow and GFR
Proteinuria
Glycosuria
Decreased plasma osmolality and haemodilution (due to RAAS activation)
Risk factors pre-eclampsia
- Condom use as contraception
- Anti-phospholipid syndrome
Chronic HTN
Obesity
Proteinuria (CKD stage 1)
Primip
FHx, personal Hx
Diabetes
Age > 35
Pre-eclampsia definition
HTN that develops beyond 20 weeks gestation and involves organ dysfunction without alternative diagnosis
Significant proteinuria in pre-eclampsia
PCR > 30
Thyroid function in pregnancy
TSH decreases -> rises in later pregnancy with decreased HcG
Increased thyroglobulin binding protein
Increased total T4
Decreased free T3/4
Predictor of neonatal hyperthyroidism in maternal graves disease
Higher TSH receptor stimulating Ab correlates with risk of neonatal hyperthyroidism
Anti-hypertensives in pregnancy
Methyl-dopa (risk of depression, nightmares)
Nifedipine
Labetolol
ACE and ANG2i contraindicated
Anti-epileptics contraindicated in pregnancy
Na Valproate - teratogenic
Topirimate - cleft palate and hypospadias
Oestrogen lowers Lamotrigine levels by 50% so women may need increased doses during pregnancy & may have toxic effects on sugar days of OCP
Most dangerous CVD risk in pregnancy
Pulmonary HTN - particularly rom Eisenmenger syndrome; R -> L shunt, Pulm HTN and Cyanosis
Treatment of pre-eclampsia
If emergency - for IV Magnesium Sulphate
Anti-HTN; Methyl Dopa, Labetolol, Nifedipine
Low dose Aspirin
Calcium supplementation to deplete patients
Delivery
Most common cause of hyperthyroidism in women of reproductive age
Graves disease
Risk of VTE in pregnancy - which trimester?
Post-partum
All other trimesters have equal risk
Disorder with highest risk of VTE in pregnancy
Homozygous Factor V deficiency
Hepatits B management in pregnancy
If HbsAg + (infected)
- High Viral load - treatment of mother from 32 weeks + HepB IG to baby at birth and then 3 doses/6 months
- Low viral load - HepB IG to baby at birth and then 3 doses vaccine/6 months
HbsAb - (non-immune)
- Vaccinate mother during pregnancy