(b)(4).A complaint sample was not provided for evaluation.Consequently, the quality of the product could not be evaluated in regards to the reported failure mode.Since returned sample lot number was not provided, dhr review was not performed.(b)(4).Without the missing components, it cannot be fully determined what caused the failure in the field.It is hypothesized there was either misuse with the lockable access tip (part of the lockable drainage line), a molding error in the valve top or assembly error.Since no probable root cause was identified for this failure mode, the investigation was not able to identify a corrective or preventive action for the reported failure.This defect will be entered into the complaint system and will be tracked/trended for future occurrences.
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