(b)(4).A visual, functional and dimensional inspection of the product involved in the complaint could not be conducted since the product was not returned.No photo available.The device history record of batch number (b)(4) that belong to catalog number 1770 has been reviewed and no issues or discrepancies were found which could potentially be related to this complaint.No non- conformance reports were originated for the lot in question that can be associated to the complaint reported.Dhr shows that the product was assembled & inspected according to our specifications.A corrective action cannot be applied since it is not possible to identify the defect reported and to investigate its root cause, in order to perform a proper investigation it is necessary to evaluate the sample involved in this complaint.The customer complaint cannot be confirmed.If the device sample becomes available at a later date this complaint will be re-opened.
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