sims' position sims' position the sims position, or left lateral sims position, named after the gynaecologist j. marion sims, is usually used for rectal examination, treatments, enemas, and examining women for vaginal wall prolapse. right lateral sims position. (the more usual left lateral sims position, suitable for a right-handed practitioner, has the patient lying on their left side.) posterior view of sims' position anterior view of sims' position the sims position is described as in the person lying on the left side, left hip and lower extremity straight, and right hip and knee bent. it is also called lateral recumbent position. sims' position is also described as the person lying on the left side with both legs bent. detailed description the position is described as follows: patient lies on their left side. patient's left lower extremity is straightened. patient's right lower extremity is flexed at the hip, and the leg is flexed at the knee. the bent knee, resting against bed surface or a pillow, provides stability. arms should be comfortably placed beside the patient, not underneath. common uses: administering enemas postpartum perineal examination per-rectal examination osteopathic manipulative treatment techniques