Although most musculoskeletal injuries are not life - threatening , open fractures or fractures accompanied by severe blood loss and fractures that damage vital organs are medical emergencies requiring immediate attention 直接由骨折引起的并发症包括与骨连接、无血管性坏死和骨感染相关的问题。间接并发症则与血管和神经损伤有关，会导致出现间室综合征、静脉血栓、脂肪栓塞、外伤性或低血容量性休克等。
Regard this as the starting point , this paper deduces the random error formula of the filling and opening fractured rock mass by using the transmission law of the error and calculates the error combined with the actual project 以此为出发点，利用误差的传递定律推导出了充填裂隙岩体和张开裂隙岩体的随机误差计算公式，并结合实际工程问题分别对充填裂隙和张开裂隙两种情况下利用随机误差公式进行了的误差分析。
