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Use nasal oxygen cannula with best instruction
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If you experience a disruption in the flow of oxygen coming from your Nasal Oxygen Cannula
Remove your cannula and place the nasal prongs in a glass of water, or disconnect the mask and place the tubing in a glass of water. If you see bubbles, oxygen is flowing.
heck that the tubing is connected to the mask or Nasal Oxygen Cannula.
Check that the liter flow is turned up to the prescribed amount.
Check the oxygen tubing for an obstruction, replace if needed.
Check that the lid on the humidifier bottle is on correctly.