(b)(4).Method: the complaint pt101 airvo humidifier was returned to fisher & paykel healthcare (f&p) in new zealand for evaluation.The device was visually inspected and electrically tested.Results: visual inspection revealed no damage to the device.During testing it was found that the device was working properly.No fault was found with the device.Conclusion: we were unable to determine the cause of the reported issue, as the complaint pt101 airvo humidifier was found to be operating correctly.The airvo user manual states that the "airvo is for the treatment of spontaneously breathing patients who would benefit from receiving high-flow, warmed and humidified respiratory gases" and that "the unit is not intended for life support." the user manual warns the user: prior to each patient use, ensure that the auditory alarm signal is audible by conducting the alarm system functionality check described in the alarms section the alarm system functionality check instructs the user on how to check the alarm function and states that "if either alarm signal is absent, do not use the unit.Contact your fisher & paykel healthcare representative.".
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