• Ravi P Kiran, Koby Herman, Dilara Khoshknabi, Athanasios Angistriotis, and James M Church.
• Colorectal Surgery, Columbia University Medical Center/New York Presbyterian Hospital, New York, NY.
• Ann. Surg. 2022 Sep 1; 276 (3): 562-569.

BackgroundCurrent clinical dogma favors universal inpatient admission after colorectal resection particularly in the presence of an anastomosis.ObjectiveWe evaluate the feasibility and safety of ambulatory surgery in carefully selected patients undergoing colorectal resection/anastomosis.MethodsBetween October 2020 and October 2021, all patients undergoing colorectal resection/anastomosis meeting specific criteria {no major comorbidity [American Society of Anesthesiologist (ASA) <4], not on therapeutic anticoagulation, compliant patient/family} were counseled preoperatively for ambulatory surgery (discharge <24 h postsurgery). Complicated surgery (ileoanal pouch, enterocutaneous fistula repair, reoperative pelvic surgery, multiple resections) and/or ostomy creation (loop/end ileostomy, Hartmann's, abdominoperineal resection) were exclusions. Discharge was at 6 to 8 hours postoperatively if all predetermined factors (no ostomy teaching needed, ambulating comfortably, tolerating diet, stable vitals, and blood-work) were met and patients were willing, or was postponed to the next day at patient request. All discharged patients received phone checks the next day with the option also given for voluntary readmission if inpatient care was preferred by patient. Patients discharged <24 hours postop (AmbC) were compared to those staying on as inpatients admitted (InpC) and also to a comparable historical (October 2019-October 2020) group when ambulatory surgery was not offered (HistC).ResultsOf 184 abdominal colorectal surgery patients, 97 had complicated colorectal resection and/or ostomy. Of the remaining 87, 29 (33.3%) were discharged <24 hours postoperatively [7 (24%) patients at 8 h]. Of these 29 AmbC patients, 4 were readmitted <30 days (ileus: 1, rectal bleeding: 2, nausea/vomiting: 1), 1 readmission was on first postdischarge day, none were voluntary post phone-check. AmbC and InpC (n=58) had similar age, sex, race, body mass index, and comorbidity. InpC had greater estimated blood loss (109 vs 34 mL, P <0.001) while length of stay was expectedly significantly longer (109 vs 17 hours, P <0.001). There was no mortality in either group. AmbC and InpC had similar readmission, reoperation, anastomotic leak, ileus, and surgical site infection. Mean length of stay for HistC was 83 hours. AmbC and HistC had similar age, sex, race, body mass index, and ASA class. Complications including readmission, reoperation, anastomotic leak, ileus, and surgical site infection were also similar for AmbC and HistC.ConclusionsWith careful patient selection, preoperative education, perioperative management, and postoperative follow-up, ambulatory surgery is feasible in up to a third of patients undergoing colorectal resection/anastomosis and can be performed with comparable safety to the time-honored practice of routine inpatient hospitalization. Refinements in inclusion/exclusion criteria and postoperative outpatient follow-up will allow a paradigm shift in how such patients are managed, which has huge implications for patient experience, care-giver workload and health care finances.Copyright © 2022 Wolters Kluwer Health, Inc. All rights reserved.

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