Expiration date - unknown due to unknown product code/ lot number.Udi - unknown due to unknown product code/ lot number.Implanted date: device was not implanted.Explanted date: device was not explanted.Device manufacture date - unknown due to unknown product code/ lot number.Health professional: unknown.Occupation: unknown.The actual device was not returned; therefore, an evaluation of the actual device was unable to be conducted.The production product code/ lot number was not provided by the user facility, which prevented a meaningful review of the device history record.With no return of the actual device, the exact cause of the reported event cannot be definitively determined based on the available information.(b)(4).
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