Manubriotomy is a surgical procedure that involves the partial resection or cutting of the manubrium, which is the upper section of the sternum (breastbone). This technique is often performed to access structures within the chest, such as the heart or major blood vessels, particularly during surgeries for conditions like aortic aneurysms or cardiac procedures. By providing better access to the thoracic cavity, manubriotomy can facilitate complex surgeries while minimizing trauma to surrounding tissues.