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Difficulty: MediumLabor, Delivery, and Puerperium

Following a sudden gush of clear vaginal fluid 18 hours ago, a pregnant patient at 38 weeks gestation presents to the maternity ward. She is a nulliparous woman whose prenatal course was uncomplicated. She currently reports mild, irregular lower abdominal cramping. Her temperature is 38.7°C (101.7°F), blood pressure is 112/70 mmHg, and heart rate is 116/min. The fetal heart tracing shows a baseline of 175/min with moderate variability and an absence of decelerations. Uterine fundal palpation elicits moderate tenderness. A sterile speculum examination confirms pooling of fluid that turns nitrazine paper blue. Subsequent digital examination shows the cervix is 3 cm dilated and 80% effaced, with the fetal vertex at -1 station. Which of the following is the most appropriate next step in management?

  1. Intravenous broad-spectrum antibiotics and oxytocin administrationAnswer
  2. B
    Intravenous broad-spectrum antibiotics and immediate cesarean delivery
  3. C
    Intravenous fluids, acetaminophen, and expectant management of labor
  4. D
    Amnioinfusion and continuous fetal heart rate monitoring
  5. E
    Intravenous broad-spectrum antibiotics, tocolysis, and betamethasone administration

Answer

The most appropriate next step is to administer intravenous broad-spectrum antibiotics and augment labor with oxytocin.
The correct management for clinical intra-amniotic infection (chorioamnionitis) includes prompt administration of broad-spectrum intravenous antibiotics (e.g., ampicillin and gentamicin) and expedition of delivery. Because this patient is at term and the fetal heart rate tracing is reassuring (demonstrating moderate variability without decelerations, despite the baseline tachycardia), a vaginal delivery is safe and appropriate. Given that she is in the latent phase of labor with irregular contractions, oxytocin administration is the best step to augment labor and expedite delivery.

Step-by-Step Solution

1
Identify the clinical diagnosis based on the patient's presentation.
The patient has intra-amniotic infection (chorioamnionitis).
She presents with prolonged rupture of membranes (>18 hours), maternal fever (38.7°C), maternal tachycardia, fetal tachycardia, and uterine fundal tenderness.
2
Determine the medical management for the infection.
Intravenous broad-spectrum antibiotics (e.g., ampicillin and gentamicin) should be administered immediately.
Prompt antibiotic therapy reduces the risk of maternal sepsis and neonatal morbidity.
3
Determine the optimal obstetric management and mode of delivery.
Augmentation of labor with oxytocin to expedite vaginal delivery.
The patient is at term with a reassuring fetal heart rate tracing (moderate variability, no decelerations). Cesarean delivery is not indicated solely for this infection, and her irregular contractions require augmentation.

Key Concept

Management of Intra-amniotic Infection (Chorioamnionitis)
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Topics

Labor, Delivery, and Puerperium

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