In the lateral chest position, why is padding placed under the chest at the axillary level?

Padding placed under the chest at the axillary level serves a critical function in preventing pressure on the lower arm. In the lateral chest position, the weight of the torso can exert significant pressure on the dependent arm. This positioning could lead to potential nerve damage or circulation issues in the arm if not managed properly. By placing padding at the axillary level, the lower arm is kept elevated and protected, reducing the risk of injury during the surgical procedure.

In this context, while enhancing lung ventilation, providing comfort, and stabilizing the patient are important considerations, the primary reason for using padding in this specific anatomical area is to ensure the safety and integrity of the lower arm throughout the surgery.