On (b)(6) 2020, the physician selected a 31mm masters valve to implant.For an unknown reason, the 31mm masters valve was implanted then explanted and exchanged for a 27mm mechanical valve (sn (b)(4)).The 27mm valve dropped due to poor coordination.Another 27mm valve (sn (b)(4)) was used to complete the procedure.No patient consequences was reported.Additional information was requested.
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Additional information for: g4, g7, h2, h6, and h10 an event of implanting and then explanting a 31mm masters valve for an unknown reason was reported.A smaller 27mm valve was successfully implanted.The results of the investigation are inconclusive since the device was not returned for analysis.The device history record was reviewed to ensure that each manufacturing and inspection operation was performed and the product met all specifications.Based on the information received, the cause of the reported incident could not be conclusively determined.
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