Alarms
9650-002360-01 Rev. A
ZOLL Z Vent Ventilator Operator’s Guide
5-25
2072
High Tidal Volume
Alarm triggers during pressure targeted ventilation when the delivered tidal
volume exceeds the user defined limit for 2 consecutive breaths. This can be
caused by a leak in the patient connection or breathing circuit. When the
ventilator is not able to reach the pressure target flow increases to compensate
which leads to a high delivered tidal volume. It is critical to set this alarm with
infant and pediatric patients given that the high resistance airways used with
these patients can provide a false airway pressure even when the patient has
extubated or decannulated. The user should check for leaks/disconnects in the
breathing circuit, patient airway or a failure of the exhalation valve. Users should
also assess if the patient is anxious and breathing deeply or if the high tidal
volume limit is set too low. If a replacement is available the user should replace
the breathing circuit.
Mitigation/Info: Check Patient Connection, Check Circuit For Loose
Hose/Tube, Check Exhalation Valve, Check Tube Placement/Cuff,
Check High Limit Setting, ** Monitor Patient**
2073
Low Tidal Volume
Alarm triggers during pressure targeted ventilation when the delivered tidal
volume does not reach the user defined limit for 2 consecutive breaths. When
this occurs flow decelerates to maintain the airway pressure at airway pressure
limit for the duration of the breath (inspiratory time). If the PIP setting is set
properly the breath should be greater than the low limit, provided it is set
correctly. The user should check for kinks or blockage of the breathing circuit or
patient airway. In some instances the cause can be an accumulation of
secretions in the airway which will require suctioning to clear. The user should
also assess if the patient is fighting the ventilator, asynchrony, or if the PIP target
is set too low.
Mitigation/Info: Check Circuit For Kinked Hose/Tube, Check For Airway
Obstruction, Suction Airway If Necessary, Check Low Limit Setting, **
Manually Ventilate Patient**
2074
High Breath Rate
Alarm triggers when the actual breathing rate (set rate plus spontaneous patient
rate) exceeds the high alarm limit. This can be caused by the patient breathing
too fast due to anxiety or pending respiratory failure. It can also be caused by
autotriggering due to a leak or the when the spontaneous/assisted breath trigger
is set too close to the baseline pressure, PEEP. The user should check for leaks/
disconnects in the breathing circuit, patient airway or a failure of the exhalation
valve. The user should also assess if the patient is anxious and breathing deeply
or if the high tidal volume limit is set too low. If a replacement is available the
user should replace the breathing circuit.
Mitigation/Info: Check For Loose Circuit Connection, Check Trigger
Setting, Check High Alarm Limit Setting, ** Consult Physician**
Service Code
Alarm Name/Mitigation/Resolution
