Evaluation of the supine pressor test

Area of Science:

• Obstetrics and Gynecology
• Cardiovascular Physiology in Pregnancy

Background:

• Pregnancy-induced hypertension (PIH) is a significant complication affecting maternal and fetal health.
• Early detection of PIH is crucial for timely intervention and management.
• The roll-over test (ROT) has been proposed as a screening tool for PIH.

Purpose of the Study:

• To investigate the efficacy of the roll-over test (ROT) for the early detection of pregnancy-induced hypertension (PIH).
• To assess the relationship between a positive supine pressor test and the subsequent development of PIH.
• To identify factors influencing blood pressure changes during positional testing in pregnancy.

Main Methods:

• Investigated 115 normotensive healthy primigravidae between 28-32 weeks of gestation.
• Performed the roll-over test (ROT) as described by Gant et al.
• Calculated the hydrostatic effect in a subset of 15 women.

Main Results:

• No statistically significant correlation was found between a positive supine pressor test and the development of PIH.
• The hydrostatic effect was identified as a potential confounding factor influencing ROT results.
• Other factors affecting blood pressure with positional changes were also noted.

Conclusions:

• The roll-over test (ROT) may not be a reliable predictor for pregnancy-induced hypertension (PIH).
• Hydrostatic effects and other positional influences warrant consideration when interpreting ROT results.
• Further research is needed to refine early detection methods for PIH.