The Trilogy Evo Ventilator Service Required alarm indicates a possible internal problem with the ventilator requiring service. This is a high-priority alarm and should not be disregarded.

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On hearing this alarm, it is essential
to verify if the patient is being provided optimal support for respiration. If
not, it is important to switch to another backup ventilator or resuscitation
bag.
You should not attempt to turn on or
fix the ventilation machine yourself, which may have internal defects involving
electrical or mechanical parts.
Finally, reach out to technical
support or the manufacturer regarding your unit. Give them information about
your alarm and unit number so they can advise you accordingly.
While awaiting the initiation of care, the clinician would need to supervise the patient very closely while observing the circuits, connections, and filters for any issues as well as ensure that the Philips ventilator has been properly connected to a power source.

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The Service Required alarm is, in
essence, an alarm that warns in order to avoid device failure. Fast action is
required when this alarm is triggered in order to respond to this alarm.