“…These conclusions agree with the findings of the Chicago group that at least 60% of tests performed routinely preoperatively are useless as regards the need for gathering relevant information prior to an operation. 5,6 Another investigation, published in 1991, evaluated the ability of preoperative laboratory testing to predict postoperative complications. 8 Data collected from 520 patients undergoing elective surgery included American Society of Anesthesiologists (ASA) risk classification, body mass index, electrolyte values (including glucose), BUN/Cr values, blood counts, coagulation studies, total protein/albumin/lymphocyte count, EKG, chest x-ray, urinalysis, pulmonary function tests, type of anesthesia, and operation.…”