Conclusions:Partly partial pressure of oxygen in the side of pain is lower than that in uninjured side,so one of the reasons of pain is part hypoxia.

• 结果:疼痛局部氧分压明显低于健侧。结论:疼痛局部氧分压明显低于健侧,可见局部缺氧是引起疼痛的原因之一。