Integra has completed their internal investigation on 22mar2016.The investigation included: methods: review of device history records.Review of complaint history.Results: no product/manufacturing issues were identified that would have caused or contributed to the event.A review of the complaint files found two complaints for an mcp implant being replaced for pain or stiffness.According to sales data, there have been (b)(4) procedures for the mcp system.This equates to an occurrence rate of (b)(4).Conclusion: a definitive root cause cannot be established, as the implant was not returned.Possible root causes may include incorrect sizing during the initial surgery, or injury to or other physiological impairment of the patient.
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