A facility reported: "the perforator did not self-blocked and broke the dura entering the brain".Surgery was delayed for about 5 minutes.Details about injury: cerebral contusion and dural/cerebral laceration.The patient's underlying medical condition is: "coma".The drill used with the perforator is an electric medtronic.The perforator clicked in place in the drill, the recommended spring tests were performed between each burr hole.The angle of approach was perpendicular (as instructions for use states).A perpendicular approach was maintained through the drilling process and there was a constant downward pressure.
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