Page 191 - 2026 SMOG

ZOLL 731 VENTILATOR:
PRE-MISSION CHECKS AND TROUBLESHOOTING
Procedure
1. With the breathing circuit connected, turn the POWER switch to ON to allow the ventilator to
complete Self Check and begin operation with its default values.
2. The PATIENT DISCONNECT alarm should be active. (The audible alarm will be muted during
the 2minute initial mute.)
3. Press the MANUAL BREATH button; gas should flow out of the patient connection each time
the button is pressed. Note: The minimum period between manual breaths is limited by the tidal
volume and the time required to complete a full exhalation based on the I:E ratio.)
4. Close the patient port with a clean hand or a gloved hand. During the inspiratory phase, the
HIGH AIRWAY PRESSURE LIMIT alarm should activate after 2 breaths that reach the PIP
High Limit.
5. If the HIGH AIRWAY PRESSURE LIMIT alarm fails to activate, ensure that all of the tubing
connections are secure, the exhalation valve is closing during inhalation, and that the High
Airway Pressure Limit is set to 35cm H O or less.
2
6. After a breath or two, release the patient port while allowing the ventilator to operate. The
PATIENT DISCONNECT alarm should activate.
7. Partially close the patient port to reset the PATIENT DISCONNECT alarm. With no other
alarms occurring, remove external power from the ventilator. The EXTERNAL POWER
LOW/DISCONNECT alarms should activate. Reconnect external power to reset alarms.
**If either the HIGH AIRWAY PRESSURE, PATIENT DISCONNECT, or EXTERNAL POWER
LOW/DISCONNECT alarms fail to activate, continue to manually ventilate the patient, replace
the ventilator, and send the unit in for service.**

2026 Standard Medical Operating Guidelines (SMOG) • 183