Is routine abdominal drainage necessary for patients undergoing elective hepatectomy? A protocol for systematic review and meta-analysis

To evaluate comparative outcomes of routine abdominal drainage (RAD) and non-routine abdominal drainage (NRAD) during elective hepatic resection for hepatic neoplasms.We systematically searched MEDLINE, EMBASE, The Cochrane Library, Web of Science. The searching phrases included "liver resection," "hepatic resection," "hepatectomy," "abdominal drainage," "surgical drainage," "prophylactic drainage," "intraperitoneal drainage," "drainage tube,"...