Knee-chest or genupectoral—used tor gynecological and obstetrical conditions such as impacted fetal head or transverse presentation. (F) Trendelenburg—used in abdominal surgery. Modified Trendelenburg (torso flat and feet elevated) preferred in shock. (G) Lithotomy or dorsosacral—used in genital tract operations and vaginal hysterectomy. (H) Right lateral recumbent—side-lying, relieves pressure on sacrum and heels.