Qn#(b)(4).The customer reported that the nebulizer did not produce mist prior to use.The customer returned one sealed kit (representative sample) of catalog number 1886 micro mist nebulizer w/elong for analysis, lot 74b1800628.Returned components included a jet, jar, cap, mask, tubing and ifu.During the visual inspection, brown colored particulates were observed sitting inside of the cap and on the inside well of the cap.5cc of water was added to the returned nebulizer unit, the tubing was connected to an air flowmeter and the pressure was increased to 8 lpm.During the functional inspection, the nebulizer produced mist.The device history record of batch number 74b1800628 was reviewed and no issues or discrepancies were found which could potentially relate to this complaint.No non-conformance reports were originated for the lot in question that can be associated to the complaint reported.The dhr shows that the product was assembled and inspected according to specifications.The reported complaint that the nebulizer did not produce mist was not confirmed through the functional inspection.During the functional testing, the nebulizer produced mist from the chamber of the nebulizer.However, because the actual sample was not returned, the root cause of this investigation is undetermined.
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