In cardiothoracic surgery, what action helps prevent intraoperative injury to the brachial plexus when the patient is in the Sims position?

When positioning a patient in the Sims position for cardiothoracic surgery, placing rolled towel padding beneath the abducted down-side arm is crucial for preventing intraoperative injury to the brachial plexus. The brachial plexus is a network of nerves that passes near the shoulder and is particularly vulnerable during surgical procedures where the patient’s arms are positioned.

In the Sims position, one arm is typically abducted while the other arm is positioned alongside the body. If the arm that is down-side is not adequately cushioned, it can lead to excessive pressure on the nerves, resulting in compression injuries. The use of rolled towel padding helps to elevate and support the arm, distributing pressure more evenly and protecting the brachial plexus from trauma.

This action is vital during surgery, as it not only helps to maintain proper circulation and nerve function but also prevents long-term complications that may arise from nerve damage. Other factors, such as securing the legs or monitoring vital signs, while important for patient safety and stability, do not directly address the specific concern of brachial plexus injury in this particular positioning scenario.