ACT
Pronunciation: ay-see-tee
Also written as: ACT — Activated Clotting Time
Activated clotting time; a point-of-care test measuring blood coagulation during anticoagulated procedures.
Full Definition
Activated clotting time (ACT) is a rapid bedside coagulation test used to monitor the degree of anticoagulation during vascular surgical procedures. The test measures the time required for blood to clot in the presence of an activating agent, providing real-time feedback on heparin effectiveness. ACT values are essential for ensuring adequate anticoagulation during vascular procedures while avoiding excessive bleeding. Target ACT levels typically range from 250-300 seconds for most vascular interventions.
Usage
Usage note: Always capitalized when referring to the coagulation test.
In Context
- "ACT was maintained between 250-300 seconds throughout the procedure." — operative report
- "Serial ACT measurements confirmed adequate heparinization before vascular clamping." — anesthesia record