The Analysis of Using Modified Clavien Classification of Surgical Complications in Postoperative Complications of Mini-Percutaneous Nephrolithotomy

［Abstract］Objective To discuss risk factors for postoperative complications after Mini-percutaneous nephrolithotomy（mPNL）using modified Clavien classification of surgical complications. Methods　From September 1999 to December 2010，4533 patients having complications after mPNL were analyzed with five related clinical factors using the modified Clavien classification of surgical complications in the Second Affiliated Hospital of Kunming Medical University. Results　Among 88 cases having complications（1.94%），69 had hemorrhage （0.24%），5 had colon injury（0.11%）， 3 had septic shock（0.06%），5 had liquid absorption syndrome （0.11%），6 had pleural effusion（0.13%）. According to the modified Clavien classification，11 cases were clustered into Class I （0.24%），71 cases into Class II（1.56%），6 cases into Class Ⅲa （0.13%）and no cases was classified in Class Ⅲb，Ⅳa， Ⅳb and V. For patients having complications of Class II and III， the average hospital stay was significantly longer than those having either Class I or no complications. Multiple logistic regression analysis showed that five factors were associated with postoperative complications，including operation time（OR=1.46）， ASA score（O =2.49），having cardiovascular disease or diabetes at the same time（OR=1.67）， stone load （OR=1.34）and positive urine culture（OR=0.97）. Conclusion　Using modified Clavien classification of surgical complications in the analysis of mPNL was standard， objective， applicable and recommended.