(b)(4).Additional information: the device was received for evaluation.A visual inspection was performed and identified no issues.Functional testing of the device included leak testing, clear passage testing and pressure testing; functional testing identified no issues were identified that could have caused or contributed to the reported problem.A batch review was conducted and there were no deviations found related to this condition during the manufacture of this lot.The reported issue was not verified, and the cause could not be determined.Should additional relevant information become available, a supplemental report will be submitted.
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