Abstract
Thirty-two cases after gastrectomy and 15 cases after cola-rectal resection were studied before and year after surgery to determine the changes in bone mineral density (BMD, g/cm2) by dual energy X-ray absorptiometry. BMD in 1 year after gastrectomy was significantly lower than oreoperative RMD (0.93 ± 0.17 vs. 0.89 ± 0.15 in males, 0.68 ± 0 A3 vs. 0.65 ± 0.13 in females) (p<0.01) and BMD in males after color-rectal resection was lower than preoperative BMD (0.97 ± 0.20 vs. 0.88 ± 0.16) (p<0.05). The rates of bone loss, expressed as the percent change in preoperative BMD was no difference between males and females, -4.1 ± 6.7 vs.-5.7 ± 5.3 after gastrectomy, and-2.3 ± 2.9 vs.-0.3 ± 4.0 after colo-rectal resection. The rates of bone loss in patients with after total gastrectomy, Billroth I, Billroth and color-rectal resection were-9.5 ± 5.7, -1.8 ± 5.5, -4.5 ± 4.8 and-1.7 ± 3.3, respectively. Only the rate of bone loss in patients with after total gastrectomy was greater than that in patients with other three operation methods (p<0.05). We suggest that bone mineral disorders occur in a year after gastro-intestinal surgery, especially after total gastrectomy and it is necessary to evaluate BMD longitudinally.
