A retrospective multicenter study of operating room extubation and extubation timing after cardiac surgery

Abstract

Background

In an effort to enhance recovery after cardiac surgery, intraoperative extubation has been targeted as possibly beneficial. This multicenter cohort study aimed to assess this by evaluating the outcomes of operating room (OR) extubation versus extubation within 6 hours of intensive care unit (ICU) arrival (early ICU extubation). Furthermore, we assessed time to ICU extubation and mortality and morbidity.

Methods

Patients undergoing on-pump cardiac surgery across 79 hospitals between 2011 and 2020 were included to (1) compare outcomes among OR extubation and early ICU extubation patients and (2) assess time to overall ICU extubation and outcomes.

Results

The overall study cohort comprised 163,982 patients, including 95,982 patients (OR extubation: n = 2529 [2.6%] and early ICU extubation: n = 93,453 [97.4%]) who underwent comparison of OR with early ICU extubation. After overlap weighting, patients with OR extubation had longer OR times (5.6 vs 5.1 hours, P < . 0001) and greater rates of reintubation (5.2% vs 2.9%, P = .003), prolonged ventilation (3% vs 2%, P = .021), reoperation for bleeding (1.5% vs 0.7%, P < .01), pneumonia (1.9% vs 1.1%, P < .006), and greater in-hospital mortality on multivariable regression (odds ratio, 1.34, P < .001). Patients with OR extubation at centers with low OR extubation rates (<10%, n = 60) had greater mortality (odds ratio, 1.6, P = .001). Beyond 22 hours of postoperative ICU ventilation, the risk of morbidity and mortality increased significantly.

Conclusions

Few patients who undergo cardiac surgery are extubated in the OR, which is associated with no clinical benefit and with increased morbidity. Cardiac surgery programs should reconsider OR extubation after cardiopulmonary bypass. In addition, increased intubation time, in particular >22 hours, is associated with an increase in adverse outcomes.