Intermediate
Technical
IVT
circulatory arrest time
Duration of complete cessation of blood circulation during cardiac surgery, typically measured from aortic cross-clamp to resumption of circulation.
Full Definition
Circulatory arrest time refers to the period during which all blood circulation is stopped to allow surgical repair of complex aortic pathology, particularly arch procedures. This technique, often combined with hypothermia, provides a bloodless surgical field but carries risks of neurological injury and organ dysfunction. Safe arrest times are generally considered <30 minutes at moderate hypothermia, though this varies with temperature and patient factors.
Usage
Usage note: Specify temperature and cerebral protection method when documenting arrest times.
In Context
- "The circulatory arrest time of 28 minutes was within acceptable limits for the arch repair." — Operative report
- "Prolonged circulatory arrest time increases the risk of postoperative neurological complications." — Risk assessment
Also known as
arrest time
circulation stop time
Contrasted with
perfusion time
Don't confuse with
cross-clamp time
bypass time