Obstetrics Flashcards Preview

USMLE Step 3 MTB > Obstetrics > Flashcards

Flashcards in Obstetrics Deck (19)
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1
Q

diagnosing pregnancy

A
  • 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
Q

first trimester ROUTINE tests

A
  • 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
Q

third trimester ROUTINE tests

A
  • diabetes (OGTT at 24-28 wks)
  • CBC
  • indirect Coombs test
  • GBS (vaginal and rectal culture at 35-37 wks)
4
Q
  • sudden onset vaginal bleeding
  • SEVERE, constant pelvic PAIN
  • h/o HTN or trauma
A

abruptio placenta

5
Q
  • sudden-onset painLESS bleeding
  • occurs at REST or during activity w/o warning
  • h/o trauma, coitus, or pelvic examination
A

placenta previa

6
Q

placental implantation over a previous uterine scar possibly causing intractable BLEEDING

A

placenta accreta

7
Q
  • life-threatening for fetus

- fetal vessels crossing or running in close proximity to the inner os

A

vasa previa

8
Q
  1. rupture of membranes
  2. painLESS vaginal bleeding
  3. fetal bradycardia
A

classic triad for vasa previa

9
Q

first step in management

A

ALWAYS EMERGENCY CESAREAN SECTION

10
Q
  • 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
A

uterine rupture

11
Q

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

A

coagulopathy by ordering:

  • platelet count
  • D-dimer
  • fibrinogen
  • PT/PTT
12
Q

onset of regular UC

A

stage 1; latent phase effacement

13
Q

prepares cervix for dilation

A

stage 1; active phase dilation

14
Q

10cm cervical dilation

A

stage 2; descent

15
Q

delivery of baby

A

stage 3; expulsion

16
Q
  • abrupt increases in FHR lasting less than 2 minutes
  • unrelated to contractions
  • ALWAYS REASSURING
A

accelerations

17
Q
  • GRADUAL decreases in FHR
  • beginning and ending w/ contractions
  • occur in response to FETAL HEAD compression
A

EARLY decelerations

18
Q
  • ABRUPT decreases in FHR
  • UNRELATED to contractions
  • related to UMBILICAL CORD compression
  • nonreassuring
A

VARIABLE decelerations

19
Q
  • GRADUAL decreases in FHR and DELAYED in relation to contractions
  • related to UTEROPLACENTAL INSUFFICIENCY
  • nonreassuring
A

LATE decelerations