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目的 :了解高海拔地区武警全训部队下肢应力性骨折 (StressFracture ,SF)的发生情况。方法 :采用普遍性检诊及回顾性填表相结合的方法 ,分别对驻扎在海拔 2 3 70m、280 0m及 3 10 0m的武警全训部队 2 0 60名战士训练后下肢SF发生率 ,SF发生时间、发生部位、恢复情况 ,以及不同海拔高度下肢SF发生率 ,训练科目与下肢SF的关系等进行了流行病学研究。结果 :证实 3个不同地区训练后下肢SF的总发生率为 2 9.7% ,海拔 3 10 0m地区下肢SF发生率较高 ,达 3 3 .8% ,与 2 3 70m及 2 80 0m地区间差异显著 (P <0 .0 5 ) ,高海拔地区SF发生时间出现较早 ,主要集中在训练后 2周～ 8周 ,以 3周～ 4周为高峰 ,且SF的恢复也较慢 ;SF出现的部位及易产生SF的训练科目与平原地区相同。结论 :由于受到低氧、低压环境的影响高海拔地区训练后下肢SF的发生率明显增高 ,SF发生时间较早 ,而恢复却较慢。
Objective: To understand the occurrence of Stress Fracture (SF) in lower limbs of armed police training units in high altitude areas. Methods: The prevalence of post-mortem examination and retrospective filling were used to assess the prevalence of lower extremities SF, SF, and SF after training 260 trained full-fledged military units stationed at 2370m, 2800m and 3100m above sea level Occurrence time, location, recovery, and the incidence of lower extremity SF at different altitudes, the relationship between training subjects and lower extremity SF. Results: The total incidence of SF in lower extremities after training in 3 different areas was confirmed to be 2. 9.7%. The incidence of SF in lower limbs at a height of 3 10 0m was higher (33.8%), significantly lower than that of 2 3 70m and 2 80 0m (P <0.05). The occurrence time of SF in high altitude appeared earlier, mainly in the period of 2 weeks to 8 weeks after training, peaked in 3 weeks to 4 weeks, and the recovery of SF was also slower. SF appeared Of the parts and easy to produce SF training subjects and the same plain area. CONCLUSIONS: The incidence of SF in lower extremities was significantly higher after training in high altitude areas due to the effects of hypoxic and low-pressure environment. SF occurred earlier and recovered more slowly.