Effect of parenteral nutrition on nutrition status after bariatric surgery for morbid obesity.

Background: To evaluate the influence of nutrition support (parenteral nutrition [PN] vs no parenteral nutrition [nPN]) on nutrition outcome, complications, and hospital stay after bariatric surgery (BS).

Methods: Sixty-seven consecutive BS patients (17 gastric bypass and 50 biliopancreatic diversion). The first 38 received PN and the next 29 did not (nPN) during the fasting postoperative (PO) period.