RecruitingDiagnostic testA Safety and Effectiveness Prospective Blinded Clinical Study to Validate xBar System as Monitoring Tool for Anastomotic Leaks DetectionPurpose: To validate the safety and effectiveness of xBar monitoring tool for detection of post-operative anastomotic leaks in subjects undergoing rectal/sigmoid resections with anastomosis. The clinical team is blinded to the leak detection of the xBar system.