The patient has alleged that the inogen one g4 portable oxygen concentrator was charging on the table attached to the power supply plugged in directly to the wall when the patient awoke to the rug and a piece of paper on fire.The patient has not reported that death or serious injury has occurred within the complaint file.Inogen's engineering team completed the failure investigation report which indicates that there were external burn marks to the device and the external power supply but not any evidence of internal heat damage or burn marks within the device.Additionally, there is not any evidence that a device malfunction occurred.
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