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Difficulty: HardObstetric Complications

A 24-year-old primigravid woman at 39 weeks gestation is evaluated in the labor and delivery unit. She was admitted 22 hours ago in active labor, at which time spontaneous rupture of membranes occurred. Her current temperature is 39.2°C (102.6°F), blood pressure is 110/70 mmHg, and heart rate is 118/min. Physical examination reveals a diffusely tender uterine fundus. Pelvic examination shows the cervix is 6 cm dilated, 100% effaced, and the fetal vertex is at 0 station. Purulent fluid is noted in the vaginal vault. The fetal heart rate tracing demonstrates a baseline of 175/min with moderate variability and no decelerations. Maternal laboratory studies show a leukocyte count of 18,000/mm318,000/\text{mm}^3 and a hemoglobin of 10.4 g/dL10.4 \text{ g/dL}. Which of the following is the most appropriate next step in the management of this patient?

  1. Administer broad-spectrum intravenous antibiotics and allow labor to progressAnswer
  2. B
    Perform an emergent cesarean delivery
  3. C
    Administer an intravenous tocolytic agent
  4. D
    Perform an amnioinfusion
  5. E
    Transfuse one unit of packed red blood cells

Answer

The most appropriate next step is to administer broad-spectrum intravenous antibiotics and allow labor to progress.
The patient meets the clinical criteria for intraamniotic infection (chorioamnionitis), characterized by maternal fever, prolonged rupture of membranes, uterine tenderness, maternal leukocytosis, and fetal tachycardia. The standard of care is prompt administration of broad-spectrum intravenous antibiotics (typically ampicillin and gentamicin) and antipyretics to reduce maternal fever and improve fetal hemodynamics. Intraamniotic infection alone is not an indication for cesarean delivery; expectant management of labor or labor augmentation to achieve a vaginal delivery is the preferred approach, as it carries lower morbidity for the mother.

Step-by-Step Solution

1
Diagnose the maternal condition based on clinical findings.
The patient has intraamniotic infection (chorioamnionitis).
Diagnosis is confirmed by maternal fever (>39.0°C) along with prolonged rupture of membranes, uterine fundal tenderness, purulent vaginal fluid, maternal leukocytosis, and fetal tachycardia.
2
Evaluate the fetal heart rate tracing for signs of acidemia or distress.
The tracing shows baseline tachycardia (175/min) with moderate variability and no decelerations.
Moderate variability indicates the absence of fetal acidemia. The tachycardia is a physiologic fetal response to maternal fever and infection, making this a Category II (indeterminate but reassuring) tracing.
3
Determine the necessity of surgical versus medical intervention.
The patient requires medical management without immediate surgical delivery.
Intraamniotic infection is treated with broad-spectrum antibiotics (e.g., ampicillin and gentamicin) and antipyretics. It is not an automatic indication for cesarean delivery; vaginal delivery should be allowed to progress unless standard obstetric indications arise.

Key Concept

Diagnosis and management of intraamniotic infection (chorioamnionitis) during labor.
Estimated Time:1m 30s
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Topics

Obstetric Complications

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