The lateral kidney position allows approach to the retroperitoneal area of the flank.To render the kidney region readily accessible,the _______________ is raised,and the bed flexed so that the area between the twelfth rib and the iliac crest is elevated.Compression of the ____________ can occur when the flank is raised too high.

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Raising the kidney bridge depends on the cardiovascular response of the body to increased pressure transmitted from this area.It should be raised slowly,and the anesthesia provider should monitor blood pressure frequently.The OR bed is flexed to lower the patient's head and legs.The patient's affected side thus presents a straight horizontal line from shoulder to hip.In this position,the gravitational force on the head and torso opposes that on the extended limb to facilitate operative exposure.Increased intra-abdominal pressure evoked by the kidney bridge and by flexion of the lower limbs toward the abdomen limits diaphragmatic movement.The acute angulations of the body in the lateral kidney posture and the effect of gravity also may decrease blood return to the right side of the heart.

The Lateral Kidney Position Allows Approach to the Retroperitoneal Area