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This study compared the costs of an inpatient elective surgical admission process with an outpatient based same day admission programme in patients undergoing laparoscopic cholecystectomy. The effect of this process change on annual surgical volume and case flow (number of procedures performed per surgical bed) in the year before the initiation of same-day method (1989/90) and subsequent to the widespread use of the process (1992/93), was also assessed. Costs incurred by 53 patients who underwent preoperative anaesthetic and surgical assessment as outpatients and were admitted as an outpatient on the day of surgery (SD Group) were compared with those incurred by 11 patients who entered hospital on the day before surgery and underwent anaesthetic and other assessments as inpatients (IP Group). Nursing, radiology, laboratory, operating room, rehabilitation and clinic costs were obtained for each patient. The remaining costs were not amenable to individual attribution and were assigned to each group as a percentage of the allocated costs. The cost per case in the SD Group was $360 less than in the IP Group, reflecting decreased nursing costs incurred by the SD Group. Between the period 1989/90 and 1992/93, the number of surgical beds declined 15.7%; however, surgical volume decreased by only 5.4%. Total case flow improved by 12.2%, that for elective and non-elective surgery increasing by 14.1% and 9.5%, respectively. Elective surgery, where same day admission was used, showed the greatest improvement in case flow. We conclude that a same day admission process reduces cost and serves to enhance hospital productivity.

Changing the admission process for elective surgery: an economic analysis