(b)(4).The device was not returned to edwards for evaluation.The clinical observation was unable to be confirmed.Ring dehiscence may occur early or late.When it occurs in the early post-operative period, it is typically a result of an inadequate valve repair in combination with friable myocardial tissue.Late dehiscence can occur as a result of successive dilatation of cardiac structures that result from progression of disease or from endocarditis.A definitive root cause cannot be determined.No further corrective or preventative actions are required at this time.Edwards will continue to review and monitor all events through the use of edwards quality systems.Trends are monitored on a monthly basis and if action is required, appropriate investigation will be performed.
|