MTB - Obstetrics Flashcards
(234 cards)
3 things that suggest pregnancy?
amenorrhea
enlargement of uterus
+ urine B-hcg
when can you see a gestational sac?
4-5 weeks by transvaginal USG
level of B-HCG when you can see a gestational sac
1500 mIU/ml
fetal heart movement first seen on USG
5-6 weeks
fetal heart tones first heard by doppler
8-10 weeks
CCS TIP - when you have a newly diagnosed pregnant patient, what should you always order?
pregnancy counselling
ORDER icon: “counsel patient, pregnancy”
finding of anemia - first tri labs
Hb < 10 g/dL
most reliable indicator in pregnancy = MCV
MCC of anemia in pregnancy
iron deficiency
pregnant pt with LOW Hb and LOW MCV
give iron
- if anemia does not improve, test for thalassemia
pregnant pt with LOW Hb, high MCV, high RDW
give folate
when should you give RhoGAM to pregnant pts?
to RH negative mothers:
- at 28 weeks after first rescreening
- after any procedure (CVS, amniocentesis)
- after delivery
Tx of asymptomatic bacteriuria in pregnancy
Nitrofurantoin - if before 30 weeks
Cephalosporins
Amoxicillin
a pregnant pt is rubella IgG ab negative - when should you vaccinate her?
after delivery
- do NOT give rubella vaccine during pregnancy
pregnant pt has positive HbsAg - what test should you order next?
HBeAg
- signifies highly infectious state
tx. of syphillis in pregnancy
IM penicillin
- if allergic, desensitize and then tx with penicillin
tx. pf Chlamydia/gonorrhea in pregnancy
PO azithromycin + IM ceftriaxone
alternative: PO amoxicillin
tx. of Bacterial Vaginitis in pregnancy
PO metronidazole or clindamycin PO
tx. of trichomonas vaginalis in pregnancy
PO metronidazole
MCC of abnormal serum MS-AFP
gestational dating error
first test to order if abnormal serum MS-AFP
USG
inhibin A
made by placenta during pregnancy, remains constant during 15-18th week
- elevated in DOWNs
what is the triple marker screen and when should you order it?
between 15-20 weeks gestation
MS-AFP
B-hcg
Estriol
causes of increased MS-AFP
neural tube defects ventral wall defects twin pregnancy placental bleeding renal disease saccrococcygeal teratoma
causes of decreased MS-AFP
trisomy 21
trisomy 18