根据负重能促进骨的生长和修复的理论，观察了桡骨缺损的家兔在任其自由活动情况下其同侧尺骨的反应，以及自拟益气活血汤对尺骨这种应力反应的影响。结果发现，对照组损伤侧尺骨骨髓腔较健侧明显变细，用药组则更细，明显小于对照组。用药组血液流变学较对照组有明显改善，体重增长也高于对照组。因此推论，整体机能的提高可能是促进尺骨应力反应的原因。 According to the theory that weight-bearing can promote the growth and repair of bone, the rabbit’s ipsilateral ulna reaction under free movement was observed, and the influence of Yiqi Huoxue Decoction on stress response of ulna was observed. The results showed that the ulnar bone marrow cavity in the injured side of the control group was significantly thinner than the healthy side, and the medication group was thinner and significantly smaller than the control group. The hemorheology of the medication group was significantly better than that of the control group, and the weight gain was also higher than that of the control group. Therefore, it is inferred that the improvement of the overall function may be the reason for promoting the ulnar stress response.