Using Middle Cerebral Artery Doppler Ultrasound to Predict Clinical Chorioamnionitis After Preterm Prelabor Rupture...

Area of Science:

• Perinatal medicine
• Fetal medicine
• Neonatal neurology

Background:

• Chorioamnionitis impacts neonatal brain blood flow, measured by middle cerebral artery (MCA) peak systolic velocity (PSV).
• Preterm prelabor rupture of membranes (PPROM) increases the risk of chorioamnionitis.

Purpose of the Study:

• To investigate if fetal MCA blood flow measures, including PSV, are altered before clinical chorioamnionitis develops after PPROM.
• To identify potential early markers for chorioamnionitis in PPROM pregnancies.

Main Methods:

• Prospective observational study of 50 patients diagnosed with PPROM.
• Weekly fetal MCA PSV measurements, with the value closest to delivery used for analysis.
• Primary outcome: clinical chorioamnionitis; exposure: MCA PSV; secondary outcomes: histological chorioamnionitis, neonatal health metrics.

Main Results:

• No significant association was found between MCA PSV and the development of clinical chorioamnionitis.
• An elevated MCA pulsatility index (PI), indicating increased flow resistance, was associated with a higher likelihood of developing clinical chorioamnionitis.

Conclusions:

• MCA PSV does not appear to be a reliable indicator of impending chorioamnionitis in PPROM.
• Elevated MCA PI may serve as a potential predictive marker for chorioamnionitis in PPROM.
• Larger studies are required to validate these findings.