906-0731-01-05 Rev. C ZOLL Ventilator Operator’s Guide D-5
I) Set the ventilator to the following:
Mode: AC (v)
BPM: 6, with low BPM limit set to 2
Tidal Volume: 100 ml
High Pressure Limit: 100 cm H
2
O
PEEP: 0
II) Occlude the Y-connection at the patient end of the circuit with a gloved hand and
initiate a mechanical breath with the circuit connected to the ventilator.
III) Record the volume (ml) and PIP (cm H
2
O).
IV) Divide the volume (100 ml) by the PIP to obtain the tubing compliance:
C
T
= 100 ml/PIP (Typical C
T
= 1.6 ml/cm H2O at 25 degrees C.)
Determine the compressible volume for a given breath (V
C
).
V
C = CT x (PIP - PEEP)
Add the compressible volume to the set tidal volume to compensate for the gas
volume loss in the tubing.
Note: ZOLL Medical Corporation recommends that, on a daily basis, you examine the
patient circuit for damage or wear, such as cracking, discoloration, or disfigurement. If
there is any sign of physical degradation or if the unit is indicating breathing problems,
replace the patient circuit.
Troubleshooting -- Pediatric/Adult Patient Circuits
If there are circuit-related alarms during trigger set up or initial use, such as Disconnect, PEEP
Leak, Low Airway Pressure, or Incomplete Exhalation, check all circuit connections and the
exhalation valve.
Figure D-2 Pediatric/Adult Patient Circuit Connections
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