Philips received a complaint on the intellivue mp5sc spotcheck monitor indicating while it was paired to an intellivue mx40 device, the patient spo2 measurements dropped below the alarm desaturation limit, but the device did not produce an audible alarm.The spo2 level dropped to around 20% and the patient was treated by being placed on 100% oxygen.The patient made a full recovery.The following functional tests were performed: a philips field service engineer (fse) went to the customer site.The fse obtained the event logs.Review of the event logs concluded the intellivue mp5sc spotcheck monitor alarm volume was set to zero at the time of the event which is why no audible alarm was produced.The results of functional testing indicate that the device functioned according to specification.Based on the information available and the testing conducted, the cause of the reported problem was use error due to the customer setting the alarm volume to zero.The device was confirmed to be operating per specifications and no failure was identified.The investigation concludes that no further action is required.The device remains at the customer site.
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