cross-clamp time
The duration during cardiac surgery when the aorta is clamped, stopping blood flow to the coronary arteries.
Full Definition
Cross-clamp time, also called aortic cross-clamp time, refers to the period during cardiac surgery when a clamp is placed across the ascending aorta to isolate the heart from systemic circulation. This allows the surgeon to operate on a bloodless, motionless heart while the patient is supported by cardiopulmonary bypass. During this time, the myocardium receives no blood flow except what is provided by cardioplegia solutions for myocardial protection. Cross-clamp time is a critical factor in surgical outcomes, as prolonged ischemic times increase the risk of myocardial injury and postoperative complications. Typical cross-clamp times vary by procedure complexity but are generally kept as short as possible while ensuring surgical precision.
Usage
Usage note: Always express as a specific time duration; hyphenate the compound modifier.
In Context
- "The cross-clamp time was 68 minutes for the mitral valve replacement." — operative report
- "Efforts were made to minimize cross-clamp time to reduce myocardial ischemic injury." — surgical summary