Treatment of Clinical Chorioamnionitis When Maternal Fever Is Present with Two or More Clinical Signs at 23 Weeks Gestation
This protocol covers the management of clinical chorioamnionitis in pregnancies at gestational age 23 0/7 – 23 6/7 weeks, where the diagnosis is established by maternal fever together with two or more additional clinical indicators of infection.
Clinical Scenario
Clinical chorioamnionitis is diagnosed by the presence of maternal fever (temperature ≥37.8°C or ≥38.0°C) combined with two or more of the following signs:
- Maternal tachycardia (heart rate >100 beats/min)
- Fetal tachycardia (heart rate >160 beats/min)
- Uterine tenderness
- Purulent or foul-smelling amniotic fluid or vaginal discharge
- Maternal leukocytosis (white blood cell count >15,000/mm³)
At 23 0/7 – 23 6/7 weeks, this presentation requires prompt attention to both maternal treatment and gestational-age-specific fetal considerations.
Treatment Approach
Management centres on intravenous antibiotic therapy combined with antipyretics; at this gestational age, antenatal corticosteroids and fetal neuroprotective measures are also part of the structured clinical approach.
The full antibiotic regimen, penicillin-allergy alternatives, dosing guidance, delivery timing, and complete clinical algorithm are available in the structured protocol below.
Clinical Goals
Resolution of clinical chorioamnionitis within 16 hours of treatment, with reduction of maternal temperature and resolution of fetal tachycardia following antipyretic administration.
References
- Clinical chorioamnionitis has been traditionally diagnosed by the presence of maternal fever (temperature ≥37.8°C or ≥38.0°C) plus two or more of the five following clinical signs: maternal tachycardia (heart rate >100 beats/min), fetal tachycardia (heart rate >160 beats/min), uterine tenderness, purulent or foul-smelling amniotic fluid or vaginal discharge, and maternal leukocytosis (white blood cell count >15,000/mm³).
- In summary, although there is insufficient data to demonstrate the most appropriate antimicrobial regimen for the treatment of this obstetric condition, current available evidence indicates that women with clinical chorioamnionitis, mainly those with a gestational age ≥34 weeks and in labor, can be treated with ampicillin 2 g IV every 6 hours combined with gentamicin 5 mg/kg every 24 hours or 1.5 mg/kg every 8 hours, or ampicillin/sulbactam 3 g IV every 6 hours.
- Thus, it appears reasonable to administer ACS to women with clinical chorioamnionitis between 24 0/7 and 33 6/7 weeks of gestation and to consider its administration to those with a gestational age between 23 0/7 and 23 6/7 weeks.
- Recently, it was reported that two patients with intrapartum fever and fetal tachycardia had a reduction of maternal temperature and resolution of fetal tachycardia 20 minutes after administration of acetaminophen 1 g IV.
DOI: 10.1016/j.ajog.2020.09.044
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