A physician reported the dura mater was damaged when using a codman perforator (id 261221) despite stopper was activated.The born pad was not formed which leads to damaging the dura matter.The bleeding was stopped, and the patient condition is well.The procedure was completed with the same perforator.The manufacturer used with the perforator is bien-air/yufu.According to information provided, it is unknown if the drill was electric or pneumatic.It is also unknown if the perforator clicked in place in the drill, and if the recommended spring tests were being performed between each burr hole.
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