Antepartum hemorrhage Flashcards Preview

OBGYN Clerkship > Antepartum hemorrhage > Flashcards

Flashcards in Antepartum hemorrhage Deck (17)
Loading flashcards...
1
Q

placenta adheres to uterine wall

A

placenta accreta

2
Q

placenta invades into myometrium

A

increta

3
Q

placenta penetrates through to uterine serosa

A

percreta

4
Q

membranes form dense ring around placenta

A

circumvallate placenta

5
Q

fetal vessels develop over internal os

A

vasa previa

6
Q

fetal vessels insert between amnion and chorion

A

velamentous placenta

7
Q

extra lobe of placenta ± blood fetal vessels between two lobes

A

succenturiate placenta

8
Q

4 causes of third trimester hemorrhage

A

Obstetric causes: placenta previa (20%), abruptio placentae (30%), fetal vessel rupture, uterine rupture

Non-obstetric causes: cervical/vaginal lacerations, hemorrhoids, infx, neoplasms
**non-obstetric present as spotting, no ctx, no abd pain

9
Q

3 subtypes of previa

A

complete, partial, marginal

10
Q

previa painful or painless?

A

painless

11
Q

suspect placenta previa, next step?

labs to get?

A

transabd or vag US (if <34 wks, give tocolytics and beta)

H&H, Type and cross

12
Q

usually asx during pregnancy, presents as vaginal bleed + inability to separate placenta after delivery

A

accreata, increta, percreta

13
Q

3rd trimester vaginal bleeding + severe abd pain, strong ctx

A

placental abruption

14
Q

risk factors for abruption

A

HTN > trauma, previous abruption, smoking, cocaine

15
Q

vaginal bleeding + sinusoidal pattern on FHR [tachy → brady → sinusoidal

A

fetal vessel rupture

16
Q

how is fetal vessel rupture diagnosed

A

Apt test (examine blood for fetal/nucleated RBCs, pink indicates fetal blood)

17
Q

what are the 3 common causes of fetal vessel rupture

A

Vasa previa: fetal vessels develop over internal os

Velamentous placenta: fetal vessels insert between amnion and chorion

Succenturiate placenta: extra lobe of placenta ± blood fetal vessels between two lobes