Enhanced Recovery Programs for Colorectal Surgery and Postoperative Acute Kidney Injury: Results From a Systematic Review and Meta-Analysis of Observational Studies.

BACKGROUND: Enhanced recovery programs (ERPs) for colorectal surgery bundle evidence-based measures to reduce complications, accelerate postoperative recovery, and improve the value of perioperative health care. Despite these successes, several recent studies have identified an association between ERPs and postoperative acute kidney injury (AKI). We conducted a systematic review and meta-analysis to determine the association between ERPs for colorectal surgery and postoperative AKI. METHODOLOGY: After conducting a search of major databases (PubMed, Embase, Scopus, Google Scholar, and ScienceDirect), we conducted a meta-analysis of observational studies that reported on the association between ERPs and postoperative AKI. RESULTS: Six observational studies (n = 4765 patients) comparing ERP (n = 2140) to conventional care (n = 2625) were included. Overall, ERP patients had a significantly greater odds of developing postoperative AKI (odds ratio [OR] = 1.98, 95% confidence interval [CI] 1.31-3.00, P = .001) than those who received conventional care. There was no evidence of publication bias (Begg's test P = 1.0, Egger's P value = .95). CONCLUSIONS: Based upon pooled results from observational studies, ERPs are associated with increased odds of developing postoperative AKI compared to conventional perioperative care. The mechanism for this effect is likely multifactorial. Additional research targeting high risk patient populations should evaluate the role of restrictive fluid administration, hemodynamic goals, and scheduled nephrotoxic agents in ERP protocols.