Could a heart ointment help heal leg wounds after surgery?

This early study tests whether applying nitroglycerin ointment (a medicine that widens blood vessels) to surgical wounds during high-risk leg surgeries can improve blood flow and reduce complications like infection or wound separation. Fifteen adults undergoing specific ankle, heel, or shinbone surgeries will receive the ointment, and blood flow will be measured with a special imaging system. The goal is to see if this simple approach is worth testing in larger trials.