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Ann Thorac Surg 2007;83:2103-2110
© 2007 The Society of Thoracic Surgeons
a University of Florida College of Medicine Jacksonville, Jacksonville, Florida
b Duke Clinical Research Institute, Durham, North Carolina
c The Cleveland Clinic Florida, Weston, Florida
d Eastern Carolina Cardiovascular Institute, Greenville, North Carolina
Accepted for publication January 23, 2007.
* Address correspondence to Dr Haan, University of Florida College of Medicine, 653-1 W 8th St, FC-12, Jacksonville, FL 32209 (Email: connie.haan{at}jax.ufl.edu).
Background: A price of training residents in cardiothoracic surgery is often perceived to be a loss in intraoperative efficiencies, leading to prolonged cardiopulmonary bypass and perfusion time. Because these indicators are also thought to adversely affect operative outcome, we investigated the association between residency training status, perfusion times, and outcomes.
Methods: Using the Society of Thoracic Surgeons (STS) National Cardiac Database, we studied 369,906 CABG patients undergoing isolated coronary artery bypass graft (CABG) procedures during January 2002 through June 2005. Participating institutions were stratified by residency versus nonresidency status and by perfusion time categories and analyzed for association with clinical outcomes.
Results: Overall, 57 (10%) of 594 STS participants had a residency training program. Residency programs had longer mean cross-clamp and perfusion times than nonresidency programs, 73.10 versus 67.44 minutes and 104.75 versus 98.00 minutes, respectively (p < 0.0001 for both. Longer perfusion time was significantly associated with higher operative mortality at the patient level. Unadjusted mortality rates were, however, similar for patients at residency and nonresidency programs (2.30% versus 2.27%), with an adjusted odds ratio of 0.96 (95% confidence interval, 0.84 to 1.09). Although perfusion times have not changed significantly over time between residency and nonresidency programs, mortality rates have significantly improved over time at each.
Conclusions: Residency programs have longer CABG perfusion times than nonresidency cardiothoracic surgery programs, but these differences are minor. Adjusted procedural outcomes at residency training programs are similar to those at nonresidency centers; thus, patients do not appear to be adversely impacted by the time costs of surgical training.
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