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Prior to use on a patient, the device alarm speaker failed to annunciate on power up and the device falsely detected a sensor cable disconnect and reconnect during setup. The monitor detection of a false sensor cable disconnect and reconnect may cause the monitor to discontinue monitoring and transition into the calibration screen without an audible alarm.
Philips has identified a specific lot of non-conforming material manufactured by one of its suppliers. A Philips supplier incorrectly used polyester-based polyurethane (PE-PUR) sound abatement foam, a non-conforming material in the devices and repair kits. PE-PUR foam may degrade into particles which may enter the device s air pathway and be ingested or inhaled by the user. The foam degradation may be exacerbated by use of unapproved cleaning methods such as unapproved ozone cleaners, and the PE-PUR foam may off-gas certain chemicals during initial use of the device.