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Difficulty: EasyObstetric Complications

A 29-year-old multiparous patient at 39 weeks gestation is admitted to the labor and delivery unit in active labor. Her cervix is 5 cm dilated and 100% effaced, with the fetal vertex at -2 station. Thirty minutes later, she experiences a spontaneous gush of clear vaginal fluid. Immediately following this event, the electronic fetal monitor demonstrates a sudden, prolonged drop in the fetal heart rate to 70/min lasting for over 3 minutes. A sterile vaginal examination reveals a palpable, pulsating rope-like mass in the vaginal canal ahead of the fetal presenting part. Which of the following is the most appropriate immediate step in management?

  1. Manually elevate the fetal vertex and prepare for an emergency cesarean deliveryAnswer
  2. B
    Transport the patient directly to the operating room without further vaginal manipulation
  3. C
    Infuse normal saline into the uterine cavity via a transcervical catheter
  4. D
    Attempt to manually replace the umbilical cord into the uterus
  5. E
    Administer intravenous terbutaline and continue continuous electronic monitoring

Answer

The most appropriate immediate step is to manually elevate the fetal vertex to relieve pressure on the cord and prepare for an emergency cesarean delivery.
The patient is experiencing an overt umbilical cord prolapse, an acute obstetrical emergency where the umbilical cord descends past the fetal presenting part following the rupture of membranes. The fetal head subsequently compresses the cord against the maternal pelvis, leading to an abrupt cessation of fetal blood flow, evident as a sudden and prolonged deceleration (bradycardia) on the fetal monitor. The immediate, life-saving intervention is to relieve this mechanical compression. This is achieved by a clinician inserting a gloved hand into the vagina and continuously pushing the fetal presenting part upward and away from the cord. This manual elevation must be maintained while the patient is urgently transferred to the operating room for an emergency cesarean delivery.

Step-by-Step Solution

1
Identify the clinical presentation and diagnosis based on the physical exam findings.
The presence of a pulsating rope-like mass in the vaginal canal following rupture of membranes, accompanied by sudden fetal bradycardia, is diagnostic of an overt umbilical cord prolapse.
Accurate identification of the obstetrical emergency dictates the urgency and type of intervention.
2
Understand the underlying pathophysiology causing the abnormal fetal heart rate.
The fetal presenting part is compressing the prolapsed umbilical cord against the maternal pelvis, severely obstructing fetal blood flow and causing rapid hypoxia.
Understanding the mechanical obstruction highlights why medical management alone (e.g., tocolytics) is insufficient.
3
Determine the most critical immediate intervention to save the fetus.
The provider must immediately insert a hand into the vagina to manually elevate the fetal presenting part off the cord, maintaining this position until a cesarean delivery is accomplished.
Manual elevation is the primary resuscitative maneuver to restore umbilical perfusion and prevent fetal demise while preparing for surgery.

Key Concept

Overt umbilical cord prolapse presents with sudden fetal bradycardia or severe variable decelerations following membrane rupture; immediate management requires manually elevating the fetal presenting part to relieve cord compression while expediting an emergency cesarean delivery.
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Topics

Obstetric Complications

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