Third trimester bleeding

Question 1

Definition of low-lying placenta

Answer 1

Placental edge <2cm from internal os

Question 2

Placenta previa risk factors

Answer 2

History of placenta previa 
Previous cesarean delivery
Multiple gestation 
Advancing maternal age 
Tobacco use

Question 3

Placenta previa delivery timing

Answer 3

36w0d - 37w6d

Question 4

Placental abruption risk factors

Answer 4

Abdominal trauma 
Shearing force in MVA - rapid acceleration/deceleration 
History of abruption 
Hypertension/preeclampsia 
Tobacco use 
Cocaine use 
Uterine anomalies (bicornuate, fibroids) 
Polyhydramnios (sometimes with SROM

Question 5

Placenta accreta spectrum incidence

Answer 5

1 in 272 (2016)

Question 6

Placenta accreta spectrum risk factors

Answer 6

History of cesarean section 
Placenta previa 
Advanced maternal age
Multiparity
Prior uterine surgeries
Asherman syndrome

Question 7

Risk of placenta accreta if placenta previa is present in 1st, 2nd, 3rd, 4th, 5th, >6th number of c-section

Answer 7

3%, 11%, 40%, 61%, 67%, 67%

Question 8

Placenta accreta spectrum delivery timing

Answer 8

planned C-hyst; 34w0d - 35w6d

Question 9

Volume of 1u of:
pRBC
platelets
FFP
cryo

Answer 9

300cc
50cc
250cc
40cc

Question 10

type 1 vasa previa

Answer 10

velamentous umbilical cord

Question 11

type 2 vasa previa

Answer 11

connects bilobed placenta or succenturiate lob of the placenta

Question 12

vasa previa prevalence

Answer 12

1 in 2500

Question 13

vasa previa risk factors

Answer 13

Bilobed, succenturiate, low-lying placenta
Multiple gestation
IVF

Question 14

vasa previa delivery

Answer 14

34w0d - 37w-0d