(b)(4).Product usage when the alleged issue was encountered is unknown.A visual, functional and dimensional inspection of the product involved in the complaint could not be conducted since the product was not returned.A device history record review did not show issues related to the complaint.A document assessment (fmea) was conducted and no changes required.Corrective actions cannot be established since it is necessary to receive the physical sample to perform a proper investigation and confirm the alleged defect.At this time since the device sample is not available, it is not possible to determine the source of the defect reported.Customer complaint cannot be confirmed since the device sample is not available to perform a proper investigation and determine the root cause.If the device sample becomes available at a later date, this complaint will be updated accordingly.
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(b)(4).The sample was returned for evaluation.A visual exam was performed and there were no defects observed.Functional testing was performed and the unit was connected to 110vac.The unit passed the initial power connect test and navigated through the power-on self-test (p.O.S.T.) with no issues.During the temperature display accuracy test the unit displayed the correct temperatures and properly alarmed in the high temperature scenario.The unit was prepared for the functional bench test where water, an adult breathing circuit (880-36kit), 10 lpm of air pressure, and a low compliance column is connected to the unit for a real time operational scenario.The unit temperature was set at 37 degrees c.The unit reached set temperature and maintained that temperature for one hour with no interruptions.Based on the investigation performed, the reported complaint could not be confirmed.Functional testing did not reveal any operational anomalies.
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