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We have completed our investigation of customer complaint #(b)(4).Problem description: it has been reported that during withdrawal of the puncture needle the guidewire was still attached to the needle.Investigation results: the device has been returned for an investigation.A visual check could confirm the described issue.A kink at the j-tip end of the guidewire was visible.This kind of damage has been intensively investigated in the past by the r&d department and could be traced back to a withdrawal of the guidewire against the cannula.Therefore, the root cause is seen in user error in operational context.A kinked guidewire is not likely to result in death or serious injury.Additionally, design changes of the guidewire (like stainless steel instead of nitinol and welding of tip instead of gluing) have been discussed to decrease the risk of breaking, uncoiling and kinking.But overall, no reasonable design change of the guidewire could be identified.All discussed changes would introduce new risks or increase existing risk, which would not be outweighed by the benefits.Overall, investigations did indicate that the device failed to meet its specification when the event occurred.A relationship between the device and the complaint is therefore considered as likely.Upon the complaint occurrence the device was involved and used on a patient for advanced hemodynamic monitoring.There is no indication for a systematic root cause as a deficiency of design, production or material considering the very low complaint rate (< 0,01 %, considering root cause).Based on the information stated above, no additional actions will be taken.The complaint will be closed.
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