OB Definitions - Labor/Arrest

Question 1

Failed IOL

Answer 1

failure to achieve active labor (6 cm) with pitocin (for at least 18 hours after AROM)

Question 2

Active phase arrest

Answer 2

6 cm with ROM and no cervical change on pitocin w/ 4 hours adequate contractions or
6 hours inadequate ctx

Question 3

Protracted active phase

Answer 3

<1 cm dilation in 2 hours

Question 4

Prolonged second stage arrest

Answer 4

Nulliparous > 3 hours pushing (without epidural)
Multiparous > 2 hours pushing (without epidural)

*can diagnose earlier if there is no fetal rotation/descent despite adequate contractions, pushing effort, time

Question 5

Presentations in which VD contraindicated:
(2)

Answer 5

Mentum posterior
transverse lie, back down –> needs classical CD

Question 6

What are mid forceps?

What type of forceps are done more often?

Answer 6

Station above + 2 cm
head engaged
not typically done anymore

Outlet forceps: + 2 station or below, head at pelvic floor (at or on perineum).