Population-Based Assessment of Selective Drain Placement During Pancreatoduodenectomy Using the Modified Fistula Risk Score.

Abstract

Recent studies on postoperative pancreatic fistula (POPF) prevention suggest that omission of perioperative drains is safe for negligible- or low-risk patients undergoing pancreatoduodenectomy (PD). However, this proposed pathway has not been validated in a nationwide cohort. The ACS-NSQIP-targeted pancreatectomy database from 2014 to 2016 was queried to identify patients who underwent PD. Using a previously validated modified Fistula Risk Score (mFRS), patients were stratified as negligible/low- or intermediate/high-risk. Multivariate regression models were used to analyze the effect of intraoperative drain placement on relevant perioperative outcomes in both high- and low-risk patients. Among 6,730 patients undergoing PD, 3,375 (50%) were high-risk; 3,355 (50%) were low-risk. Among high-risk patients, drain placement (n = 3,093, 92%) was associated with a higher rate of POPF (26% vs 16%, p = 0.0003), clinically relevant (CR) POPF (20% vs 12%, p = 0.0015), and extended hospital length of stay (LOS, 9 vs 7 days, p < 0.0001), but decreased serious morbidity (29% vs 35%, p = 0.0330). Similarly, drain placement in low-risk patients (n = 2,785, 83%) was associated with a higher rate of POPF (11% vs 6%, p = 0.0006) and extended LOS (8 vs 7 days, p < 0.0001), yet lower serious morbidity (18% vs 23%, p = 0.0037). On multivariate logistic regression, drain placement was associated with significantly increased odds of CR-POPF and a significantly reduced incidence of serious morbidity among both high-risk (odds ratio [OR] 0.72, 95% CI 0.55 to 0.94, p = 0.0155) and low-risk patients (OR 0.71, 95% CI 0.57 to 0.89, p = 0.0027). In this population-based cohort, the mFRS was unable to stratify patients relative to the need for selective drain placement during PD. For both high- and low-risk patients, perioperative drain placement was associated with increased rates of POPF, CR-POPF, and extended LOS, but decreased incidence of serious morbidity.