A physician reported disengagement failure of a disposable perforator (id 261221) during surgery and dural damage was observed.It occurred at making the first burr hole at the tent.Hemostasis and dural suturing were performed.The drill used was anspach.According to information provided, it is unknown if the drill was electric or pneumatic, or if the angle of approach perpendicular as the ifu (instructions for use).It is also unknown if the perpendicular approach maintained through the drilling process or was there any rocking motion included or if there was a constant downward pressure.
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Perforator (id 261221) has not been returned for evaluation - device history record (dhr)- there is no indication that the production process may have contributed to this complaint.All test results passed procedural specifications.Failure analysis - visual inspection utilizing unaided eye and was heavily soiled with organic material, but no other anomalies were observed.Spring test attempted, unit had a frozen inner / outer drill that was cleaned and had organic material removed.Once cleaned, the unit passed the spring test as designed.Unit successfully drilled 5 holes with no issues therefore, the complaint condition could not be verified.The root cause is undetermined and was unable to be confirmed in the complaint evaluation.Product was received for analysis and the investigation could not confirm the complaint.Possible root cause: ¿user misuse¿ or ¿drill allows to be set incorrectly¿.
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