The reported ultrabutton device, intended for use in treatment, was not returned for evaluation.A relationship between the product and reported incident cannot be established as the product was not returned.Without the reported product a visual evaluation cannot be performed and customers complaint cannot be confirmed.From the information provided, flipping thread got cut off and there was laceration to the graft.An exact root cause cannot be determined without evaluation of the device; however, factors that could have contributed to the reported event include: (1) sharp edges.Sharp edges on the button can result in damage to the flipping thread and laceration to the graft.There were no indications that would suggest that the device did not meet product specifications upon release into distribution.
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