The woman must be transferred in lateral tilt position.
Pregnant women's inferior vena cava compression is consistently relieved by a 30° left-lateral tilt, while in certain cases, a 30° right-lateral tilt posture results in the best inferior vena cava volume.
Although it is conventional wisdom that women having spinal anesthesia for a cesarean delivery should be positioned with a 15° left-lateral tilt, the patients in many of the early trials were actually in a right-lateral tilt position. Unknown is the superiority of right posture over left positioning for ideal inferior vena cava volume. We compared the effects of right-lateral and left-lateral tilt positions on the abdominal aortic and inferior vena cava volumes in pregnant women using magnetic resonance imaging.
The gravid uterus's compression of the inferior vena cava was consistently lessened by a 30° left-lateral tilt.
