Intermediate
Technical
IVT
aortic clamping time
The duration during which the aorta is cross-clamped to create a bloodless operative field.
Full Definition
Aortic clamping time, also known as aortic cross-clamp time, measures the period during cardiac surgery when the ascending aorta is occluded with a cross-clamp to stop antegrade flow and create optimal surgical conditions. This interval is critical as prolonged clamping increases the risk of myocardial ischemia, neurological complications, and multi-organ dysfunction. Modern surgical techniques and myocardial protection strategies aim to minimize clamping time while ensuring adequate surgical repair.
Usage
Usage note: Always specify in minutes; distinguish from total bypass time which includes periods without aortic clamping.
In Context
- "The aortic clamping time was 47 minutes for the valve-sparing root replacement." — operative report
- "Efforts to reduce aortic clamping time included meticulous surgical planning and efficient valve repair techniques." — surgical case discussion
Also known as
cross-clamp time
aortic occlusion time
Contrasted with
perfusion time
Don't confuse with
cardiopulmonary bypass time
circulatory arrest time