1. Introduction
SUPINE HYPOTENSION SYNDROME, UTERUS
Intraspinal anesthesia has always been the first choice for cesarean section. However, after the full-term parturient is anesthetized in spinal canal, the foil effect of abdominal muscles on the uterus is eliminated. In supine position, the enlarged uterus oppresses the inferior vena cava and abdominal aorta. At the same time, anesthesia can dilate the blood vessels in the plane, resulting in supine hypotension syndrome [