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Difficulty: MediumObstetric Complications

A 32-year-old woman, gravida 3, para 2, at 39 weeks gestation is admitted to the labor and delivery unit in spontaneous active labor. Her pregnancy is complicated by polyhydramnios. Her vital signs are within normal limits. Cervical examination reveals 5 cm dilation, 80% effacement, and the fetal presenting part at -2 station. Thirty minutes later, the patient experiences a spontaneous rupture of membranes with a large gush of clear fluid. The continuous electronic fetal heart rate monitor immediately shows a sudden, prolonged deceleration to 70/min that persists for 3 minutes. The nurse performs a sterile vaginal examination and palpates a pulsating, rope-like mass protruding through the cervical os ahead of the fetal presenting part. Which of the following is the most appropriate next step in the management of this patient?

  1. Manually elevate the fetal presenting partAnswer
  2. B
    Proceed directly to emergent cesarean delivery
  3. C
    Reposition the patient laterally and administer supplemental oxygen
  4. D
    Attempt manual replacement of the prolapsed mass into the uterine cavity
  5. E
    Perform an amnioinfusion with warmed normal saline

Answer

Manually elevate the fetal presenting part
The patient's presentation of a palpable, pulsating vaginal mass following membrane rupture, accompanied by a prolonged fetal heart rate deceleration, is diagnostic of an overt umbilical cord prolapse. This is an obstetric emergency. The prolapsed cord becomes compressed between the fetal presenting part and the maternal pelvis, completely obstructing fetal blood flow. The most critical initial step is to insert a hand into the vagina and manually elevate the fetal presenting part off the umbilical cord. This position must be maintained continuously by the provider while the patient is urgently transferred to the operating room for an emergent cesarean delivery.

Step-by-Step Solution

1
Identify the primary complication based on clinical findings.
The patient has a pulsating, rope-like mass in the vagina following rupture of membranes with an unengaged fetal head (station -2) and polyhydramnios.
These physical examination findings are diagnostic of an overt umbilical cord prolapse.
2
Determine the pathophysiological consequence of the complication.
The prolapsed cord is being compressed between the descending fetal head and the maternal pelvis, as evidenced by the severe, prolonged fetal heart rate deceleration.
Cord compression physically obstructs fetal blood flow, leading to rapid and severe fetal hypoxia.
3
Select the immediate next step in management.
The most appropriate initial step is to manually elevate the fetal presenting part off the prolapsed cord.
This physical maneuver immediately restores umbilical blood flow and must be maintained continuously while the patient is rapidly transported for an emergent cesarean delivery.

Key Concept

The initial management of umbilical cord prolapse requires immediate manual elevation of the fetal presenting part to relieve cord compression while preparing the patient for an emergent cesarean delivery.
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Topics

Obstetric Complications

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