The manufacturer was contacted in reference to the voluntary field safety notice / recall notification related to the sound abatement foam in certain cpap, bipap, and mechanical ventilator devices.The manufacturer previously received information alleging a lung cancer.The medical intervention was not specified.The device was returned to the manufacturer's product investigation laboratory for further investigation.During the investigation, the manufacturer observed a high-pitched whine sound coming from the device determined to be from the blower.There were 0 blower hours and 0 therapy hours were logged, suggesting the device data was reset prior to manufacturer receipt.No errors were logged.Dust/dirt contamination was observed throughout device enclosure, and airpath, suggesting a source external to the device.Slight black contamination at the blower seal of the blower box is consistent with the keratin contamination.The manufacturer concludes there was no evidence of sound abatement foam degradation and confirmed dust and dirt contamination throughout device enclosure, and airpath, suggesting a source external to the device.Sections d8, d9, h2, h3, and h6 were updated.
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