4Ps (part 2) Flashcards
What refers to the relationship of the presenting of a fetus to the level of the ischial spines?
Station
When the presenting part is at the level of ischial spines, it is at __ station
0
If the presenting part is at 0 station, it is
engaged
If the presenting part is at -4 station, it is
floating
If the presenting part is at +4 station, it is
at outlet
At a +3 or +4 station, the presenting part is at the perineum and can be seen if the vulva is separated
crowning
This is the relationship between the cephalocaudal axis of the fetal body and the cephalocaudal axis of a woman’s body
Fetal lie
Apporixmately ___ of fetuses assume a ___________ lie
99%; longitudinal
This is the most frequent type of presentation
Cephalic Presentation
What percent of fetuses are in cephalic presentation?
95%
This means that either the buttocks or the feet are the presenting parts
Breech Presentation
Breech presentations occur in approximately ___ of births and are affected by _______ __________
3%; fetal attitude
What are the 6 Mechanisms of Labor?
DEFIRE ERE
- Descent
- Engagement
- Flexion
- Internal rotation
- Extension
- External Rotation
What is a process that causes cervical dilation and then expulsion of the fetus?
Uterine contractions
What are the 3 phases of contraction?
a. Increment
b. Acme
c. Decrement
