Abstract
The preoperative evaluation of the ambulatory anorectal surgery patient determines his or her relative risk for the proposed procedure. Since its beginnings at the University of California, Los Angeles, in 1962,1 ambulatory surgery has evolved to include increasingly complex and invasive procedures. In addition, advances in the medical therapy of a variety of disorders have allowed patients with multiple medical problems to undergo surgical procedures safely. Improvements in preoperative evaluation and postoperative management have been the cornerstone permitting many patients with complex medical problems to have surgery in the outpatient setting. Although fewer patients are excluded from undergoing ambulatory surgery, it is imperative that high-risk patients are carefully screened with a thorough and appropriate evaluation.
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