OBGYN LAST TEST Flashcards
Smallest Cranial Diameter for The head through the BC
Suboccipitobregmatic Diameter
When can LEOPOLDS Maneuvers be done
THIS DOES NOT REPOSTIONT THE BABY
~28 wks; typically ~35-36 wks
↓ fetal space to change position as delivery approaches
Confirms fetal:
- Lie
- Presentation (vertex, breech, shoulder)
- Estimated fetal weight (EFW)
What is “0 station”
Station (how far has infant descended into pelvis)
0 station is level of ischial spines
TRAINGLE=
Diamond+
Triangle: occiput
Diamond: face
Most common position for the occiput in the delivery
LOA
Left occiput anterior
What position should the mother be in to assess fetal head position
Lithotomy Position
What is the most favorable and most common fetal head position for delivery
Favorable: OA
MC: LOA (Diamond in the Left positior compartment)
What is the Adverse event associated with OP fetal head
Arrest of descent
What are the complications of breed presentation
↑ Maternal & perinatal morbidity
Many studies report improved perinatal outcomes w/ cesarean deliveries
What is the risk involved when doing an external cephalic version
Typically not performed before 36-37 wk
Risk of placental abruption, ROM, delivery
Can retry w/ epidural @39 wks, but if still not successful → C-section
What are the absolute C/I for external Cephalic Version
Anything that precludes vaginal delivery:
- placenta previa
- multifetal placenta
4 phases of labor
Quiescence
Activation
Stimulation (Stages)
Involution
When is the initial start for Phase 1 labor
36-38 weeks
What is cervical ripening
Collagen fibril diameter ↑ & spacing between fibrils ↑
Loss of tissue integrity & ↑ compliance
Inflammatory changes:
- Inflammatory cells invade extracellular matrix/stroma
- Prostaglandins → modify extracellular matrix
What are the 3 stages of active labor
Stage 1: Clinical onset of labor → cervical effacement & dilatation (w/ contractions)
Stage 2: Fetal descent
Stage 3: Delivery of placenta & membranes → placental separation & expulsion
When should the placenta be delivered
AKA Puerperium: ~1+ hrs after delivery
What defines TRUE labor
REGULAR uterine contractions w/ cervical change
Cervical dilation 3-4cm or greater in presence of uterine contractions (Active Labor)
1st stage (Latent) of phase 3
Latent Phase
Cervical dilation 0 to 3-5 cm
Typically will not admit to L&D in latent phase of labor until dilated at least ~3-4 cm
Exception: spontaneous rupture of membranes
1st stage (active) of phase 3 labor
Active Phase
-Cervical dilation 3-5 cm or more until completely dilated (10 cm)
What is 2nd stage of phase 3 labor
2nd Stage: fetal descent
From time of complete dilatation until delivery of infant
What is stage 3 of phase 3 labor
3rd Stage: delivery of placenta & membranes
From infant delivery until placental delivery ~<30 min
-If >60 mins → possible problem
What stage has the highest Risk of post-partum hemorrhage
stage 3 phase 3
6 hrs after delivery, mother at highest risk for developing post-partum hemorrhage
What is the rate of cervical dilation in labor
Primips → 1.2 cm/hr
Multips → 1.5 cm/hr
Do you admit pts in stage 1 labor?
Typically will not admit patient during Latent Phase of Labor unless membranes are ruptured