Oral dietary supplements in pre- and postoperative surgical patients: A prospective and randomized clinical trial

It has been suggested that the routine provision of oral dietary supplement s (ODS) in postoperative surgical patients is of benefit in terms of morbid ity and length of hospital stay. The aim of this study was to evaluate the effects of both pre- and postoperative ODS in patients undergoing an electi ve laparotomy. Patients requiring elective major gastrointestinal surgery w ere prospectively randomized into one of four groups: Group I received ODS in addition to normal diet both pre- and postoperatively, Group II were giv en ODS in the preoperative period only, Group IU received ODS only in the p ostoperative period, and Group IV did not receive any supplements. Assessme nts of nutritional status, voluntary food intake, weight loss, serum albumi n, morbidity and mortality, anxiety and depression, and postoperative activ ity levels were performed, and comparisons made between the groups. One hun dred patients were included in the study. The mean daily energy intake from preoperative ODS was 507 +/- 140 kcal, significantly more than the 252 +/- 195 kcal in the postoperative period (P < 0.001). The postoperative volunt ary food intake in patients receiving ODS was not significantly different f rom that in patients receiving normal diet alone (1090 versus 1268 kcal, 46 .2 versus 49.1 g protein, P > 0.05). All groups demonstrated an overall wei ght loss, with no significant differences between the groups, and there was no demonstrable effect on clinical outcome. At 6 mo postoperatively there were no differences between the study groups in terms of levels of activity . These results suggest that the routine use of perioperative ODS in well-n ourished patients undergoing major gastrointestinal surgery confers no clin ical or functional benefit. (C) Elsevier Science Inc. 2000.