Medical Equipment

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Obstruction leading to constant high airway pressure (>PEEP +15 cmH2O) during: > 2 breaths or 5 seconds, whichever is greater; 15 ±1.5 s if less than 2 breaths are triggered).

Possible Causes

  • Airway pressure exceeds the preset upper-pressure limitKinked or blocked tubingMucus or secretion plug in the endotracheal tube or airwaysPatient coughing or fighting ventilatorInspiratory flow rate too highImproper alarm settingBlocked expiratory filter

The patient circuit is the plastic tubing that connects the patient to the ventilator and delivers gas to and from the patient. Check to make sure there are no kinks in the hose or that there are no obstructions within the tubing.

Check the ventilator settings to ensure that the airway pressure is set to the intended value and that the high-pressure alarm is not due to a change in settings.

Check the ventilator alarm settings to ensure that the limits for which the alarm activates are not within the operating pressure of the ventilator.

Battery voltage too low. Cannot guarantee continued ventilator system operation.

Plug the ventilator into the mains power of the building to restore power to the onboard batteries.

If this alarm message arises you must replace the batteries.

Battery Replacement Guide

Less than 10 minutes left of battery operating time.

Measured O2 concentration is below the set value by more than 5 vol.% or concentration is below 18 vol.% which is independent of settings; gas delivered in the O2 supply line is not O2; O2 sensor faulty or exhausted; O2 cell uncalibrated; gas module for O2 faulty.

If this alarm message arises you must replace the O2 supply.

O2 Supply Replacement Guide

To adjust the O2 cell:

  • Tap CALIBRATION & TESTS in the extended menuTap O2 CELL ADJUSTMENT once, then againTap Yes to perform the O2 cell adjustmentTap OK

The pre-use check includes tests and measurements of:

  • internal technical functionalitybarometric pressuregas supplyinternal leakagepressure transducerssafety valveO2 cell/O2 sensorflow transducersbattery switchpatient circuit leakage, compliance, and resistancealarm statealarm output connection (option)

Leakage too high. The mask/prongs may not be adjusted properly for the patient or maybe the wrong size.

The patient circuit is the plastic tubing that connects the patient to the ventilator and delivers gas to and from the patient. Check to make sure there are cracks or holes in the tubing, and that the tubing is securely sealed to the ventilator and mask.

The endotracheal tube is a thin plastic tube that is placed inside the mouth of the patient to deliver oxygen. Check the tubing to ensure that there are no obstructions, cracks, or leaks.

Check the patient interface (breathing mask) to ensure that it forms an airtight seal around the patient’s mouth and that it is delivering oxygen to the patient.

Technical problem with the expiratory cassette.

If this alarm message arises you must replace the expiratory cassette.

Expiratory Cassette Replacement Guide