Normal Labor and Delivery and Post Partum Care -Castro Flashcards
What is true labor?
repetitive uterine contractions with progressive effacement and dilation of the cervix
What is false labor?
repetitive uterine contractions WITHOUT progressive dilation or effacement (Braxton Hicks contractions) of the cervix
What should be included in the initial assessment of labor?
- review prenatal records and labs
- confirm GA
- question about length/onset of contractions and bleeding or changes in fetal movement
- vital signs and fetal heart rate
- Leopold maneuvers to determine “lie” of the fetus
- palpate contractions
Should you perform a pelvic exam on a patient with vaginal bleeding? Why or why not?
NO! want to do an US first to r/o placenta previa
–> must be delivered by c-section*
What are the different levels of fetal station? At what point is the head considered to be “engaged”?
0 station: the biparietal diameter has entered the pelvic inlet (in vertex presentation) and the lowest presenting part is at the level of the ischial spines head is engaged
inches above the ischial spine is negative number
positive numbers to describe the station in inches below the ischial spine
What are the cardinal movements of labor?
- Engagement
- Flexion
- Descent and Internal Rotation
- Extension of the head
- External Rotation
- Expulsion
What labs should be done when a woman goes into labor?
Type and screen, CBC, possible VDRL, Hep B status and culture (possibly initiate PCN prophylaxis), urine protein (check for preeclampsia)
When should narcotics be avoided in labor?
if 8 cm or more dilated –> can cause neonatal respiratory depression (can reverse with naloxone)
What is the first stage of labor? What are the 2 phases?
first stage: onset of labor to complete cervical dilation
latent phase: slow effacement in dilation (up until 4 cm dilated)
active phase: more rapid cervical dilation (assumed at 6-7 cm dilated)
supposed to plot labor curve to determine what phase
What should be done in a prolonged latent phase?
consider sedation and rest if mother is tired or pitocin augmentation if mom is hypocontractile
What is active phase arrest? How should this be managed?
no change in cervical dilation in the active phase for > 2 hours
-evaluate the 3 Ps (passage, passenger, power (force)
–> if too big, might need a c-section
–> if not enough force, may need to add piton
(200 montevideo units is considered adequate)
–> if do not progress with adequate contractions–> c-section
What is considered an adequate contraction? How is this measured?
200 montevideo units
montevideo units=peak of contraction in mmHg TIMES # of contractions in 10 minutes
What is the second stage of labor? What should you be assessing for?
Interval from complete dilation to delivery of the fetus
assess for molding of the fetal head and for caput succedaneum (edema of the fetal scalp from pressure on the vertex)
When would operative vaginal delivery be attempted in the second stage of labor?
Operative vaginal delivery (vacuum or forceps) is usually only attempted if the head is low in the pelvis (below +3 AND the cervix is completely dilated)
if operative delivery is not possible, deliver by c-section
How long does the second stage normally last?
up to 3 hours in nulliparous (can be longer if descending and no bleeding or HR changes)
What is the third stage of labor? How long after stage 2 does this normally happen?
interval from fetus delivery to placental delivery
normally wait 30 minutes after delivery before intervening
When can you pull on the placental cord? If you pull too soon, what can happen?
after you see signs of separation (lengthening of the cord, sudden gush of blood, globular configuration of the uterus)
too soon can cause uterine inversion with maternal hemorrhage and shock –> emergency surgery
What is considered prolonged 3rd stage? What can this be due to?
if the placenta does not separate by 30 minutes after delivery
could be a sign of placenta accrete/increta/percreta
If a patient had a previous placenta previa and a c-section, can she have a vaginal delivery in subsequent births?
NO!
greatest chances of accrete
What is necessary after the delivery of the placenta? What can be done if this doesn’t happen naturally?
uterine contraction –> can be given piton and uterine massage to avoid hemorrhage
What vessels should be in the cord?
1 vein (mom–> fetus) and 2 arteries (fetus–> mom)
What is the 4th stage of labor? What should be inspected
After delivery of placenta–methodically inspect cervix, vagina, urethra, vulva and perineum for lacerations and repair with absorbable suture.
Examine the uterus (if cannot palpate the fundus–> consider inversion) and placenta (for retained tissue).
Frequently assess vital signs, uterine tone and bleeding.–> high risk for bleeding
What are the classifications of OB lacerations?
Classify Ob lacerations:
- first degree –vaginal mucosa or perineal skin
- second degree –involves subcutaneous tissue
- third degree –involves rectal sphincter
- fourth degree–involves rectal mucosa
What are the possible causes of coagulopathy leading to prolonged bleeding?
- obstetrical causes of DIC (abruption, preeclampsia, amniotic fluid embolus, sepsis, retained dead fetus)
- dilutional secondary to excessive IV fluids
- primary blood disorder (von Willebrand’s disease or ITP)
- amniotic fluid embolus –> acute onset of resp and CV collapse with DIC
