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The "Absence of Breath, Please Check Cannula" message on the Inogen One G2 (POC2000) portable oxygen concentrator indicates that the device has not detected any breath for a set period of time. This could be caused by several issues, such as problems with the cannula, breathing patterns, or the concentrator itself. Here's how to troubleshoot and fix the issue:
1. Check the Nasal Cannula
Ensure Proper Connection: Make sure the nasal cannula is securely connected to the oxygen outlet on the concentrator. Disconnect and reconnect it to ensure a tight fit.
Inspect for Kinks or Blockages: Check the cannula tubing for any kinks, twists, or blockages that might restrict oxygen flow.
Replace the Cannula: If the cannula is damaged or worn, replace it with a new one. Sometimes, the tubing or prongs may degrade over time, reducing the effectiveness of oxygen delivery.
2. Ensure Proper Placement of the Cannula
Fit in Nostrils: Make sure the prongs of the cannula are inserted correctly into your nostrils. The curved side of the prongs should face downward.
Comfortable Fit: Adjust the tubing so that it is not too loose or too tight. Make sure it’s resting comfortably behind your ears and under your chin.
3. Verify Breathing Pattern
Breathe Normally: The Inogen One G2 is designed to detect inhalation and deliver oxygen in response. Ensure you are breathing through your nose, as the device may not detect breath if you are mouth breathing.
Deep Breaths: Try taking slow, deep breaths through your nose to ensure the device can detect your breathing pattern.
4. Check the Device
Power Cycle the Unit: Turn the concentrator off, wait for 30 seconds, and then turn it back on. This can reset any temporary errors.
Check Flow Settings: Ensure the flow setting on the concentrator is set to your prescribed level. If the setting is too low, the device may not detect your breathing.
5. Check for Obstructions
Ensure Unblocked Air Intake/Exhaust: Check the air intake and exhaust vents on the device for any blockages. If these are obstructed, it may affect the concentrator’s performance.
6. Battery or Power Supply Issues
Low Battery: If the device is running on battery power, check the battery level. A low or depleted battery can affect oxygen delivery. Recharge or replace the battery if needed.
Use AC Power: If the battery is low or malfunctioning, try plugging the unit into an AC power outlet to see if the message persists.
7. Check Alarms
Device Alarm: If the device continues to alarm and displays the "Absence of Breath" message despite troubleshooting, this could indicate a system issue. In this case, consult the user manual for any additional troubleshooting steps.
8. Contact Technical Support
If the problem persists after checking the cannula, tubing, and device, contact Inogen customer support or the supplier where you purchased the device. There may be an internal issue with the breath detection system that requires professional assistance.
By following these steps, you should be able to address the "Absence of Breath" error. However, if it remains unresolved, it’s essential to consult a healthcare provider or technical support to ensure safe and continuous oxygen therapy.

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