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[Impact of the 2016 new definition and classification system of pancreatic fistula on the evaluation of pancreatic fistula after pancreatic surgery].

Objective: To discuss the impact of updated definition and classification system of pancreatic fistula published in 2016 on the postoperative classification of pancreatic fistula. Methods: Retrospective analysis was made on patients who underwent pancreatic surgery at ward 1 in Department of General Surgery, Peking Union Medical College Hospital from January 2015 to December 2016.A total of 408 patients were included in this retrospective study, male/female was 184/224, aged from 9 to 81 years with mean age of 51.6 years.One hundred and fifty-two cases were performed pancreaticoduodenectomy, 125 cases for distal pancreatectomy, 43 cases for spleen preservation distal pancreatectomy, 61 cases for partital pancreatectomy or enucleation, 8 cases for middle pancreatectomy, 6 cases for pancreaticojejunostomy and 13 cases for other procedures.Clinical data including postoperative drainage fluid volume, amylase concentration, duration of hospitalization and drainage were obtained, revaluated and re-analyzed, classified grounded on 2005 edition and 2016 edition, respectively.t-test was adopted for data analysis. Results: According to the previous standards, the incident rate of pancreatic fistula was 57.4%, and the incident rate of B-level plus C-level pancreatic fistula was 35.8%, which decreased to 13.7% based on 2016 edition.Nine patients who received percutaneous puncture or endoscopic drainage was regraded from C-level to B-level. The average duration of postoperative hospitalization of patients without pancreatic fistula was (12.5±6.0)days, demonstrating no significant difference compared to (14.1±7.7)days, duration of postoperative hospitalization of A-level(under 2005 edition of criteria) pancreatic fistula group(t=1.66, P=0.09) and (12.4±6.1)days, duration of postoperative hospitalization of biochemical leakage group(t=0.14, P=0.89). Nevertheless, there was statistical significant difference between the average postoperative duration of hospitalization(30.7±16.9) days of B-level(under 2016 criteria) pancreatic fistula patients and pancreatic fistula-free patients as well as the biochemical leakage group patients (t=7.10, 7.13; both P<0.01). Conclusions: Based on the new diagnostic criteria, the incidence of postoperative pancreatic fistula decreased dramatically.New classification system downgraded part of cases graded C-level pancreatic fistula to B-level and some B-level to biochemical fistula.The new diagnostic classification and criteria facilitated clinical practice, accomplished better conformity to clinical reality and potentially enacted clinical outcome.

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