Why Is the Pre-Use Test Failing?

There are several reasons the VOCSN Pre-Use Test may be failing. Follow the steps below to troubleshoot.

First, let’s ensure the circuit type control setting matches the type of circuit you have connected to VOCSN. It will be one of these options:

• Active
• Active with O2
• Passive
• Passive with O2
• Valveless
• Mouthpiece

To check which type of circuit VOCSN is configured to use:

1. Press the THERAPY tab.
2. Press the V icon for VENTILATION.
3. Press SETTINGS AND ALARMS.
4. Ensure you are in the tab that is NOW ACTIVE.
5. Scroll down and find CIRCUIT TYPE under the SETTINGS banner.
6. Confirm the circuit type control setting matches the circuit you have connected to VOCSN. 
7. If it matches, move on to the next troubleshooting step. If it does not match, correct it by following these steps. Note these steps will require you to disconnect the patient and stop Ventilation therapy, so please start by providing your patient with alternative ventilation.
   1. Touch a preset not labeled NOW ACTIVE to highlight, and then START.
   2. Press the THERAPY tab.
   3. Press the V for VENTILATION icon.
   4. The Circuit Type control cannot be changed in an active preset. Because of this, you will need to activate a different preset before updating the control setting for the preset you intend to use with the patient. 
      1. If you have more than one preset on your VENTILATION screen, touch a preset that is not labeled NOW ACTIVE to highlight it, and then press START beneath it.
      2. If you only have one preset on your ventilation screen:
         1. Press SETTINGS AND ALARMS
         2. Select a preset tab that is not labeled NOW ACTIVE.
         3. Press EDIT.
         4. Press Enabled.
         5. Press ACCEPT.
         6. Press EXIT.
         7. On the main Ventilation screen, touch the preset that is not labeled NOW ACTIVE to highlight, and then press START beneath it.
   5. Press SETTINGS AND ALARMS again.
   6. Select the tab for the (inactive) preset that has your patient’s settings programmed. 
   7. Scroll to CIRCUIT TYPE, touch to highlight it, and then press EDIT.
   8. Choose the correct circuit type.
   9. Press ACCEPT.
   10. Press EXIT.
   11. On the main Ventilation screen, touch to highlight the preset that has your patent’s settings and the new circuit type programmed, and then press START.
   12. A pop-up will appear. Press OK to go to pre-use test screen.
   13. Run pre-use test and confirm that it passes.
   14. Return to VENTILATION screen and disable the additional preset if desired.

If your circuit type is correct, let’s ensure the humidification control setting matches the humidification type being used.

1. Check which type of humidification is in use with the patient: a humidifier, or an HME.
2. Next, let's make sure the humidification setting on VOCSN matches:
1. Open the THERAPY tab.
2. Press the V icon for VENTILATION.
3. Press SETTINGS AND ALARMS.
4. Ensure you are in the tab that is NOW ACTIVE
5. Scroll down and find HUMIDIFICATION under the SETTINGS banner.
6. Confirm the humidification type control setting matches the humidification you have connected to VOCSN.
7. If it does not match, correct it by touching HUMIDIFICATION to highlight it. Then press EDIT, select Humidifier or HME, and press ACCEPT.
8. Run a pre-use test again.

If the Pre-Use Test is still failing, make sure the exhalation valve is not covered during the test, and that the filters are not damaged or contaminated. Here are a few more tips and reminders:

• When instructed to block the patient circuit during the Pre-Use Test, only the end of the circuit should be covered with a clean, gloved hand.
• Check your external bacterial filter. If it’s wet, soiled, or damaged, it should be replaced.
• Check your internal bacterial filter. It’s located on the side of VOCSN, behind the external bacteria filter (which is normally only replaced every 10,000 hours (PM), unless damaged). If it’s wet, soiled, or damaged, it should be replaced. Please fill out this form. One of our clinical specialists will contact you.
• If the Pre-Use Test continues failing despite all these troubleshooting steps, replace the patient circuit and try again. See the Clinical Quick Start Guide for illustrations that demonstrate correct circuit set up.