应用单光子吸收法检测94例50～81岁绝经后妇女因骨质疏松并发自发性椎体压缩性骨折患者的右前臂桡、尺骨中下1/3处的骨矿物质含量(BMD),并与女性正常值的峰值BMD比较,桡骨降低了2.7s,下降率为29.8％;尺骨降低了2.5s,下降率为23.5％。即当桡骨的BMD降低至0.435±0.064,尺骨的BMD降低至0.495±0.067时容易发生椎体的压缩性骨折,也即是椎体自发性骨折的阈值。 One-photon absorption assay was used to detect the bone mineral content (BMD) in the middle and lower 1/3 of the right forearm radial and ulnar of 94 patients aged 50-81 years with osteoporosis complicated with spontaneous vertebral compression fracture Compared with the peak BMD of normal women, the radius decreased by 2.7s, the rate of decline was 29.8%; the ulnar decreased by 2.5s, the rate of decline was 23.5%. That is to say, when the BMD of the radius decreases to 0.435 ± 0.064 and the BMD of the ulna decreases to 0.495 ± 0.067, it is easy to occur the vertebral compression fracture, which is the threshold of the vertebral body spontaneous fracture.