IntelliVue MX40 Patient Monitor, Model Nos. 865350, 865351, 865352, 867146 - Product Usage: Indicated for use by health care professionals whenever there is a need for monitoring the physiological parameters of patients. Intended for monitoring and recording of, and to generate alarms for, multiple physiological parameters of adults and pediatrics in hospital environments and during transport inside hospitals.

Reason: A problem has been detected in the Philips IntelliVue MX4O that, if it were to occur, could affect the performance of the equipment. The volume of the MX4O speaker in these devices may be diminished or not audible above 4,500 feet when operating in Monitor Mode. These devices may intermittently exhibit Speaker Malfunct INOP messages after the Power On Self-Test. The issue is only apparent when the device is being used in Monitor Mode at an altitude of greater than 4,500 feet.

Code information: All devices manufactured or repaired from 21-FEB-2017 to 22-AUG -2018. (Serial numbers included as an attachment; too many to list.)

Distribution pattern: US Nationwide distribution.