Device evaluation: product was not returned.After reviewing the complaint files attached to (b)(4) it was determined that the device 66-1991 that the customer described is the ported elbow with the slits in the blue port.The slits reported by the customer are supposed to be where they are.This was confirmed via email on the complaint attachment file (b)(4) customer response and follow up.Per this file, it was suggested to the customer to order 66-1995 if the slotted port was not needed.No fault found, the 66-1991 is the ported elbow with the slits in the blue port.Unable to complete a dhr review without the benefit of the lot number.The cause of the reported problem could not be determined.
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