The astral device was returned to resmed for an investigation.Review of the device data logs revealed on the date of the reported event, ventilation was disrupted and disconnection alarm was activated, as expected, to alert the carer/user.All alarms performed to specification.Based on all available evidence, the investigation determined that the reported complaint was due circuit disconnection.The investigation also identified contamination of the pneumatic block and indications of a degrading battery.The failure modes are not related to the reported event, and did not affect the ability of the device to deliver therapy.Based on all available evidence and complaint investigations of a similar nature, the investigation determined that the failure to complete its internal self-test was due to contamination and degraded battery was due to an isolated component failure within the device battery assembly.Resmed¿s risk analysis for this failure mode concludes that the risk is acceptable.Resmed reference#: (b)(4).
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