<unk>  can be caused by factors that affect the preoperative period, intraoperative period and postoperative period. High risk factors such as cardiovascular diseases and pulmonary diseases affect the outcome of the surgery. During the intraoperative period, hemorrhage and perforation can increase the<unk> . The postoperative factors which increase the<unk>  are infections, DVT and cerebrovascular accidents.  Antimicrobial therapy is the mainstay of therapy for infections that arise in the postoperative period.
Perioperative mortality
Hernia epidemiology and demographics
List of surgical procedures
Epistaxis cost-effectiveness of therapy
List of cancer clusters
Sudden cardiac death definitions and diagnosis
Sudden cardiac death classification
Clinical trials terminology