Other, other text: additional event information received indicating that it is unknown if a patient was involved (updated b5, h6).Manufacturing device history record review was not performed because the results of the complaint investigation do not indicate a problem with the manufacture of the device.No causes or potential causes of the customer's reported problem were found during the review of service and repair records.A product sample was received for evaluation.Visual and functional testing were performed.Visual inspection found the pump was noisy.Functional testing cannot duplicate the customer complaint.The device was run for several hours and the numbers on the display stayed the same after the temperature stabilized.Device passed all functional testing, unable to replicate the reported issue.No problem found.The root cause of the issue could not be determined.This issue will be monitored for any increase in occurrence.If the occurrence of this issue increases significantly, additional investigative action will be taken.
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