问题
单项选择题
急性血源性骨髓炎大块死骨形成的原因主要是
A．身体抵抗力差
B．骨的滋养血管栓塞
C．骨膜血管断裂
D．病理骨折
E．脓肿直接破坏骨组织
答案
参考答案：B
解析：[解题思路] 骨髓炎的脓液沿骨髓腔蔓延，破坏了骨髓组织、松质骨和内层2／3密质骨的血液供血，严重病例密质骨的内、外面都浸泡在脓液中，血管栓塞失去血供，这样便会形成大片的死骨。
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急性血源性骨髓炎大块死骨形成的原因主要是
A．身体抵抗力差
B．骨的滋养血管栓塞
C．骨膜血管断裂
D．病理骨折
E．脓肿直接破坏骨组织
参考答案：B
解析：[解题思路] 骨髓炎的脓液沿骨髓腔蔓延，破坏了骨髓组织、松质骨和内层2／3密质骨的血液供血，严重病例密质骨的内、外面都浸泡在脓液中，血管栓塞失去血供，这样便会形成大片的死骨。
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