Obstetrics Flashcards Preview

USMLE Step 3 > Obstetrics > Flashcards

Flashcards in Obstetrics Deck (19):
1

diagnosing pregnancy

- presence of gestational sac (4-5 wks by transvaginal US)
- fetal heart motion (5-6 wks)
- fetal heart sounds (8-10 wks)
- fetal movements (after 20 wks)

2

first trimester ROUTINE tests

- CBC
- type and screen
- direct and indirect Coombs
- cervical PAP smear
- UA/urine culture
- rubella Ab
- hepatitis B surface Ag
- VDRL or RPR
- HIV
- cervical culture (chlamydia and gonorrhea)

3

third trimester ROUTINE tests

- diabetes (OGTT at 24-28 wks)
- CBC
- indirect Coombs test
- GBS (vaginal and rectal culture at 35-37 wks)

4

- sudden onset vaginal bleeding
- SEVERE, constant pelvic PAIN
- h/o HTN or trauma

abruptio placenta

5

- sudden-onset painLESS bleeding
- occurs at REST or during activity w/o warning
- h/o trauma, coitus, or pelvic examination

placenta previa

6

placental implantation over a previous uterine scar possibly causing intractable BLEEDING

placenta accreta

7

- life-threatening for fetus
- fetal vessels crossing or running in close proximity to the inner os

vasa previa

8

1. rupture of membranes
2. painLESS vaginal bleeding
3. fetal bradycardia

classic triad for vasa previa

9

first step in management

ALWAYS EMERGENCY CESAREAN SECTION

10

- h/o uterine scar w/ SUDDEN-ONSET abdominal pain and vaginal bleeding
- associated w/ loss of electronic fetal HR, uterine contractions, and recession of fetal head

uterine rupture

11

ALWAYS r/o what in patients presenting w/ fetal demise?

coagulopathy by ordering:

- platelet count
- D-dimer
- fibrinogen
- PT/PTT

12

onset of regular UC

stage 1; latent phase effacement

13

prepares cervix for dilation

stage 1; active phase dilation

14

10cm cervical dilation

stage 2; descent

15

delivery of baby

stage 3; expulsion

16

- abrupt increases in FHR lasting less than 2 minutes
- unrelated to contractions
- ALWAYS REASSURING

accelerations

17

- GRADUAL decreases in FHR
- beginning and ending w/ contractions
- occur in response to FETAL HEAD compression

EARLY decelerations

18

- ABRUPT decreases in FHR
- UNRELATED to contractions
- related to UMBILICAL CORD compression
- nonreassuring

VARIABLE decelerations

19

- GRADUAL decreases in FHR and DELAYED in relation to contractions
- related to UTEROPLACENTAL INSUFFICIENCY
- nonreassuring

LATE decelerations