3- Normal Labor, Delivery & Puerperium Flashcards
Labor is defined as uterine activity that results in what?
Progressive dilation and effacement of the cervix
What is defined as thinning of the cervix described as a % of a normal 4-5cm long cervix?
Effacement
What is defined as placement/ degree of descent of the presenting part of the fetus in the maternal pelvis in relation to the ischial spines?
Station, scale of -3 to +3
What is important when evaluating for rupture of membranes?
Sterile speculum exam
What test yields high false positives due to urine, blood, semem, BV, or trichomoniasis, and what is the expected result if ruptured membranes?
Nitrazine paper testing
Turns blue in presence of alkaline amniotic fluid
What test involves visualization of an air dried sample of amniotic fluid, and what is the expected result if ruptured membranes?
“Fern test”
Fern pattern → admitted to hospital
What test for ruptured membranes only requires a small sample, is very specific and includes a vaginal swab with (-) or (+) dipstick results?
Amniosure
How is the “lie” (transverse) described with respect to fetal position?
Long axis of fetus vs long axis of mother’s body
What stage of labor is defined as onset of regular uterine contractions through full cervical dilation?
1st, latent and active phases
What stage of labor is defined as complete cervical dilation through delivery of infant and differs by race and parity?
2nd
What signs are a/w the 2nd stage of labor and aid in the descent/ expulsion of the fetus?
Uterine contractions and maternal expulsive efforts
What stage of labor is defined as the interval between delivery of the fetus and detachment/ expulsion of the placenta?
3rd, ~ 30 min
What are defined as changes in the position of the fetal head in relationship to the fetal body as it nagivates the maternal pelvis?
Cardinal movements of labor
(should be thought of as a continuous motion of connected movements)
What are the 6 cardinal movement of labor?
Engagement
Flexion
Descent
Internal rotation
Extension
External rotation
What complications are a/w the 3rd stage of labor?
Hemorrhage
Retention of placenta
Uterine inversion
What signs indicate separation of the placenta? (4)
Uterus rises in abdomen
Globular configuration
Gush of blood
Lengthening of umbilical cord
What stage of labor is defined as the interval between delivery of the placenta and the subsequent 2 hours postpartum and what is it a/w?
4th
A/w major hemodynamic changes of maternal CV system
How is adequate labor defined?
3-5 contractions in 10 min averaged over 30 min
What factors affect maternal expulsive efforts?
Maternal strength
Consciousness/ sedation
Pain
Regional anesthesia
What does an external tocodynamometer measure with respect to uterine contractions?
Frequency and duration of contractions
NOT intensity
What does an internal tocodynamometer measure with respect to uterine contractions?
Frequency, duration, and intensity
(more precise)
What is considered a macrosomic infant?
> 4500 grams
How is the “passenger” position defined?
Relation of fetal presenting part to R or L side of maternal pelvis
What are the shapes of the posterior and anterior fontanel?
Posterior- triangle
Anterior- diamond
What is the most common presenting fetal position in labor?
Left occiput anterior (LOA)
What are the 4 basic female pelvic types?
Gynecoid, anthropoid, android, platypelloid