Amniotic fluid analysis. Its role in maternal neonatal infection

Area of Science:

• Obstetrics and Gynecology
• Neonatal Medicine
• Infectious Disease

Background:

• Subclinical amnionitis (inflammation of the amniotic sac without maternal symptoms) is suspected to cause neonatal morbidity.
• Current diagnostic methods for amnionitis are lacking, making its incidence unknown.
• Maternal fever is an unreliable indicator of early infection.

Purpose of the Study:

• To investigate the utility of quantitative amniotic fluid analysis in diagnosing subclinical amnionitis.
• To correlate amniotic fluid findings with maternal and neonatal outcomes.

Main Methods:

• Amniotic fluid was analyzed for bacteria, white blood cells, and lactic dehydrogenase levels during labor in 28 high-risk patients.
• Patients were monitored for maternal infection, premature delivery, and neonatal sepsis.

Main Results:

• Thirteen of 16 patients with bacterial counts >10(3)/ml experienced adverse outcomes (maternal infection, premature delivery, neonatal sepsis, or combination).
• Maternal fever was often absent in premature deliveries linked to microbiologic evidence of amnionitis.
• Amniotic fluid analysis revealed significant bacterial presence in patients with poor outcomes.

Conclusions:

• Quantitative amniotic fluid analysis may aid in diagnosing unrecognized amnionitis.
• This diagnostic approach is valuable for patients with premature delivery or those undergoing nonelective cesarean section.
• Early identification of subclinical amnionitis can potentially improve neonatal outcomes.