CPAP in Preeclampsia

Study design: Single blinded randomised control trial Planned sample size: 30 (women randomized 2:1 to receive either CPAP or no CPAP) Objectives: Primary objective: Assess the effects of nasal CPAP on sleep physiology, 24 blood pressures and fetal movements in pregnant women (24-37 weeks gestation) with preeclampsia. Secondary objective: Assess baseline sleep physiology, blood pressure control and fetal well-being in pregnant women (24-37 weeks gestation) with preeclampsia by completing sleep studies, 24 hour blood pressure monitors, CO2 monitors, and nocturnal fetal movement and HR monitors. Study Procedure: Participants will be recruited from the antenatal ward or high-risk antenatal clinic. Following informed consent participants will be randomly assigned to receive either CPAP or no CPAP for one night, following an initial baseline overnight sleep study. Baseline- Night 1 1. Sleep study with fetal movement and HR monitor 2. 24 hour BP monitor 3. CO2 monitor Intervention- Night 2 (Nasal CPAP device or no CPAP) 1. Sleep study with fetal movement and HR monitor 2. 24 hour BP monitor 3. CO2 monitor Post-partum questionnaire A brief questionnaire to be completed within the first 6 weeks post-partum related to the participant\'s personal health, their child\'s birth details and health.