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Risk of major nonemergent inpatient general surgical procedures in patients on long-term dialysis.

Gajdos C, Hawn MT, Kile D, Robinson TN, Henderson WG. Risk of major nonemergent inpatient general surgical procedures in patients on long-term dialysis. JAMA surgery. 2013 Feb 1; 148(2):137-43.

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HYPOTHESIS: Patients on long-term dialysis undergoing major nonemergent general surgical procedures are thought to have high rates of postoperative complications and death. DESIGN: Retrospective cohort study. SETTING: Academic and private hospitals. PATIENTS: The American College of Surgeons National Surgical Quality Improvement Program database was used to select dialysis and nondialysis patients who had undergone nonemergent major general surgical procedures between 2005 and 2008. Multivariable logistic regression analysis was used to examine the effect of dialysis on 30-day surgical outcomes adjusted for age, race, sex, work relative value units, American Society of Anesthesiologists class, and recent operations (within the past 30 days). MAIN OUTCOME MEASURES: Patient morbidity, mortality, and failure-to-rescue rates. RESULTS: Dialysis patients undergoing major nonemergent general surgical procedures were significantly more likely to develop pneumonia, unplanned intubation, ventilator dependence, and need for a reoperation within 30 days from the index procedure. Dialysis patients also had a higher risk of vascular complications and postoperative death. Older dialysis patients (aged 65 years) had a significantly higher postoperative mortality rate compared with their younger counterparts. Dialysis patients were significantly more likely to die after any complication occurred, and mortality rates were especially high following stroke, myocardial infarction, and reintubation. Abnormalities in potentially modifiable preoperative variables (blood urea nitrogen level, albumin level, and hematocrit) did not increase the risk of postoperative complications or death in dialysis patients compared with nondialysis patients. CONCLUSIONS: Dialysis patients undergoing nonemergent general surgery have significantly elevated risks of postoperative complications and death, particularly if they are aged 65 years or older.

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