The reported device was not returned for evaluation.Without the return of the reported device, an exact root cause cannot be determined with confidence.The evidence provided suggests that the most plausible root cause for the event was the user not adhering to the ifu.The reported procedure details provided by customer, indicate the device was implanted and suture tensioned prior to depressing the suture lock button, without performing the bone lock.Per ifu instructions, the suture is implanted, bone lock deployed, suture tensioned and then depress function switch.Without performing the bone lock, the device mechanism will not function as intended.
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