How to calibrate Vela ventilator

Operational Verification and Calibration

Prior to using the Vela ventilator on a new patient the following checks should be carried out to ensure optimum performance. Verification testing should always be performed “off patient”.

Note: If any portion of the following performance check fails, and you are unable to correct the problem, contact your VIASYS Healthcare Certified Service Technician.

First perform the User Verification Tests (UVTs). To access the UVTs, do the following’
1. After disconnecting the patient, turn the ventilator OFF (i.e., STANDBY).
2. Press and hold the Accept button.
3. While holding the Accept button, turn the ventilator ON. Continue to hold the button until the ventilator completes the Power On Self Tests (POST).
4. Release the Accept button when the UVT menu appears in the screen. The Audible Alarm sounds. Press Alarm Reset button to clear.

5. Press the Patient Removed touch screen icon, the UVT test selection screen displays.

6. Press the appropriate touch screen icon to begin a test.

Lamp Test
Run this test to check the front lamps to make sure they are functioning properly.
1. Press the LampTest touch screen icon to start the test. The ventilator illuminates all front panel LEDs.
2. Press the LampTest touch screen icon again to turn the LEDs off and exit the test.
Switch Test

Run this test to check the front panel membrane switches to make sure they are working properly.
1. Press the SWITCH TEST icon.
2. Press each membrane switch control in turn. Watch for the name of the control to appear in the message bar at the bottom left of the touch screen as follows:

3. Press the SWITCH TEST icon again to exit the test.

Alarm Test
Run this test to check the audible alarm.
1. Press the Alarm Test touch screen icon to start the test. The audible alarm sounds.
2. Press the Alarm Test touch screen icon again to silence the audible alarm and exit the test.
Filter Test
Run this test to check the differential pressure across the turbine inlet filter. A high differential pressure may indicate a dirty or occluded filter.
1. Press the Filter Test touch screen icon. The turbine accelerates flow to 140 lpm and checks the differential pressure to make sure it is within range. At the end of the test, the ventilator displays a pass or fail message. If the test passes, the following message appears:

x.x Passed

where x.x is the average turbine differential pressure and P indicates the test passed. If the test fails, the following message appears:

x.x Failed

where x.x is the average turbine differential pressure and F indicates the test failed:

2. If the test fails, check the rotation of the turbine inlet filter to make sure that the seam is horizontally oriented and run the test again. If the test fails again, contact a Bird Certified Service Technician.

Leak Test

Note:This test should be performed with all circuit accessories installed (e.g., humidifier, water traps, and so on.) Make sure al connections are secure and all openings occluded before beginning the test.

Run this test to make sure the patient breathing circuit is not leaking.
1. Attach a one-liter test lung (P/N 33754) at the patient breathing circuit wye.
2. Press the Leak Test touch screen icon to run the test. The test begins by increasing the pressure in the patient breathing circuit to 60 cmH2O. The ventilator then displays the following messages in sequence:

Leak test requested
Leak test in progress

3. The ventilator then waits 10 seconds and measures the circuit pressure again. If the difference between the starting and ending measurements is less than or equal to 6 cmH2O, the test passes and the ventilator displays the following message:

xx.x Passed

where xx.x is the ending measurement.
4. Otherwise, if the difference is more than 6 cmH2O, the test fails and the ventilator displays the following message:
xx.x Failed

5. If the test fails, check all connections to make sure there are no leaks and repeat the test.
Exit
To exit the UVTs press the EXIT touch screen icon.