(b)(4).Investigation: x-initiated manufacturer's investigation, no sample returned, review dhr, x-inspect returned samples, inspect stock product.Analysis and findings: the event was confirmed in the visual evaluation of the returned sample, see the attached image.Definitive root cause of the reported event is indeterminable; however, several factors may be identified as being related to the evidenced result.The first is that the device may have been used outside its recommended operating power range, another may be the device was used in dense or diseased tissue and another size may have been more appropriate for the procedure being performed and yet another, may be that the generator that was used may have been in need of servicing.Previous engineering testing at csi failed in trying to duplicate reported failures when the device was used according to ifu instruction for use.Corrective actions: correction and/or corrective action: corrective action is not applicable at this time as the root cause is indeterminable.This type of event will continue to be monitored for evaluation and feasibility of any action taken in the future.Corrective action level 3, train personnel, x-none.Reason: per bsr-qar-026, this complaint will be monitored for trending in that no injury was reported to end user or patient.Was the complaint confirmed? yes.Review and closure capa required? x-recommended continuous improvement program (cip) complaint closure letter required? ncmr issued? other regulatory action needed: preventative action activity reviewed.Trend and monitor to cip.
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