The manufacturer previously reported an issue related to continuous positive airway pressure (cpap) device's sound abatement foam.There was no report of patient harm or injury.The patient also alleged particles in the device and a grey ring.The patient has respiratory issues, sore throat and sinus infection.The device was returned to the manufacturer's quality product investigation laboratory for investigation.The manufacturer visually inspected the device.Evidence of water ingress on the blower and blower box was found.Pca screw hole on the blower box cracked and came loose while disassembling.Dust/dirt contamination inconsistent with degraded sound abatement foam was observed throughout the device enclosure and air path suggesting a source external to the device.The device's event logs were downloaded and reviewed by manufacturer.The manufacturer found no error codes.The manufacturer applied power to the device and verified airflow.The manufacturer concludes there was no evidence of sound abatement foam degradation in the base unit but presence of contamination in the air path was confirmed.Dust/dirt contamination inconsistent with degraded sound abatement foam was observed throughout the device enclosure and air path.Section d5 (operator of device) was missed in the initial report, which was correctly updated in this follow up report.Section h6 was updated in this report.
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