Effects of gastric bypass procedures on bone mineral density, calcium, parathyroid hormone, and vitamin D.

Weight loss after gastric bypass procedures has been well studied, but the long-term metabolic sequelae are not known. Data on bone mineral density (BMD), calcium, parathyroid hormone, and vitamin D were collected preoperatively and at yearly intervals after gastric bypass procedures. A total of 230 patients underwent preoperative BMD scans.

Long-term data indicate a progressive loss in efficacy of adjustable silicone gastric banding for the surgical treatment of morbid obesity.

Background: Many short-term follow-up reports on the efficacy of the adjustable silicone gastric band (ASGB) and its modification for laparoscopic insertion (Lap-Band) for the surgical treatment of morbid obesity have been reported in the surgical literature. However, long-term studies are lacking.

Methods: Between March 17, 1992, and January 7, 1997, 45 females and 17 males consecutively entered this prospective study.