During resuscitation, Left Uterine Displacement must be provided when the fundus is at or above the umbilicus and maintained until what event?

• A. Infant is delivered
• B. ROSC
• C. CPR is stopped
• D. Maternal pulse returns

Answer: (A)

The key idea is that an enlarged uterus in late pregnancy can compress the inferior vena cava when a patient is treated in a supine position, which reduces venous return and makes CPR less effective. Leaving the uterus displaced to the left helps restore venous return and improves maternal perfusion during resuscitation.

This left uterine displacement should be maintained until the infant is delivered because delivery removes the source of compression. After the fetus is delivered and the uterus gradually reduces in size, the obstruction to venous return is relieved, so the need for sustained left lateral displacement ends. Keeping LUD until delivery optimizes hemodynamics during the critical resuscitation period, then standard ACLS measures continue appropriate to the now-postpartum physiology.