supine hypotensive syndrome
Drop in blood pressure that occurs when a pregnant woman lies on her back, caused by compression of the vena cava by the enlarged uterus.
Full Definition
Supine hypotensive syndrome, also called aortocaval compression syndrome, is a condition that affects pregnant women typically after 20 weeks of gestation when lying in the supine position. The enlarged uterus compresses the inferior vena cava and sometimes the aorta, reducing venous return to the heart and subsequently decreasing cardiac output and blood pressure. Symptoms may include dizziness, nausea, shortness of breath, and pallor. The syndrome can also reduce placental blood flow, potentially affecting fetal well-being. The condition is easily prevented and treated by positioning the patient in left lateral position or placing a wedge under the right hip to displace the uterus. This syndrome is an important consideration during medical procedures and labor management.
Usage
Usage note: Emphasize positioning recommendations in patient education and procedure planning.
In Context
- "The patient developed supine hypotensive syndrome during the ultrasound, requiring left lateral positioning." — Procedure note
- "All third-trimester procedures should include precautions to prevent supine hypotensive syndrome." — Clinical protocol