Which of the following is an antemortem change caused by surgery or trauma?

• A. Subcutaneous emphysema
• B. Gangrene
• C. Bacterial translocation
• D. Agonal edema

Answer: (A)

An air leak into the soft tissues from injury or surgical procedures is a classic ante-mortem change. When the lungs or airways are damaged or deliberately opened during surgery, air can escape into the subcutaneous tissues. This manifests as subcutaneous emphysema, which often feels crackly under the skin and may be visible on imaging. The presence of this air indicates the event occurred while the person was alive (ante-mortem) because it reflects ongoing air leakage from living tissues rather than a postmortem artifact.

Gangrene is tissue death from loss of blood supply or infection and isn’t a specific sign tied to a recent trauma or surgery. Bacterial translocation refers to bacteria crossing the gut barrier, a process more about sepsis risk than a direct antemortem change from a surgical injury. Agonal edema occurs in the dying process and is not specifically caused by surgery or trauma.