Vyaire VELA, Service Manual

Page: 62 / 111

Chapter 7: Operational Verification Procedure
7-3
33373-001 Version A
4. Tee in a calibrated flow/volume analyzer into the patient circuit and verify Vti is displayed on the
analyzer.
7.2.1 Delivered Volume Test
1.
Press the “MAIN” icon on the top center screen; select the “Extended Functions” button; select
the “Vent Setup” button.
2. S
elect the “Altitude” button (far right of window) and set current locations proper altitude before
continuing.
NOTE
There are many different and varied types of Pressure/Volume measurement devices used in
calibration and functional testing. It is not the intention of Vyaire to suggest the use of any one
particular device over another. Whatever device is used should have the capabilities to measure
pressures and volumes accurately and should be calibrated as per the device manufacturer
recommendations
3. With the ventilator in normal operating mode with parameters set as listed above.
4. Measure the delivered volume from ventilator with Peak Flow of 20 lpm. Results must be within
10% of volume setting, i.e. 500 ml ± 50 ml on both the calibrated flow/volume analyzer and the
Vti Monitored values window on the ventilator.
5. Measure the delivered volume from ventilator with Peak Flow of 60 lpm. Results must be the
same as mentioned above on both the calibrated flow/volume analyzer and the Vti Monitored
values window on the ventilator.
6. Measure the delivered volume from ventilator with Peak Flow of 80 lpm. Results must be the
same as mentioned above on both the calibrated flow/volume analyzer and the Vti Monitored
values window on the ventilator.
NOTE
If this test does not pass, do not continue with performance test. Turn to Chapter 9
“Troubleshooting” section under
“Delivered Volume Test”
and follow the troubleshooting guide
for the failed test.
7.2.2 Monitored Volume Test
NOTE
Perform this test only after the
“Delivered Volume Test”
has been completed and the results are
acceptable with tolerances provided.
Set Ventilator parameters as follows:
Mode: Volume Assist Control
Volume: 500 ml
Peak Flow 60 lpm
Breath Rate 12 bpm
PEEP 5 cmH2O