Risk factors of delayed awakening after aortic arch surgery under deep hypothermic circulatory arrest with selective antegrade cerebral perfusion.

Background:

To determine the risk factors of delayed awakening following aortic arch surgery under deep hypothermic circulatory arrest (DHCA) in combination with selective antegrade cerebral perfusion (SACP).

Methods:

We retrospectively analyzed the clinical data of all patients who underwent aortic arch surgery under DHCA + SACP between September 2015 and September 2017 in our hospital. Delayed awakening was defined as recovery of consciousness later than 24 hours after the surgery. Risk factors of delayed awakening were evaluated using multivariate logistic regression analysis.

Results:

A total of 168 subjects were included. In-hospital mortality of the overall sample was 19.05% (n=32). Delayed awakening occurred in 76 (45.23%) subjects. Subjects with delayed awakening had older age, hypertension, higher rate of emergency surgery and blood transfusion, and longer cardiopulmonary bypass (CPB) time and myocardial blocking time. Multivariate regression analysis showed emergency surgery (P=0.005) and CPB time >240 min (P<0.001) as risk factors for delayed awakening, even after adjusting potential confounders, including age, hypertension, aortic cross-clamp time and blood transfusion.

Conclusions:

In patients undergoing aortic arch surgery under DHCA + SACP, emergency surgery and CPB time >240 min are risk factors for delayed awakening.