Final answer:
When moving an anesthetized patient from lithotomy to supine position, legs must be lowered slowly to avoid hypotension caused by blood pooling in the legs, which could lead to a sudden drop in blood pressure.
Step-by-step explanation:
When an anesthetized patient's position is changed from lithotomy to supine, the patient's legs should be lowered slowly to prevent hypotension. This is because of the potential for blood pooling in the veins of the lower extremities due to the effects of anesthesia and the position, which can lead to a sudden drop in blood pressure when the legs are lowered. Rapidly changing positions may disrupt the blood flow returning to the heart, leading to a decrease in cardiac output and resulting in hypotension. Laryngospasm, respiratory distress, and peroneal nerve damage are not directly related to the change in position from lithotomy to supine.