Patient Preparation for FeNO Breath Testing with the NObreath
This is a suggested protocol, other protocols may be available.
24 hours prior to test
It is recommended to avoid alcohol consumption for 24 hours before the test¹
12 hours prior to test
It is recommended to avoid smoking for 12 hours before the test¹
It is recommended to avoid eating foods high in nitrates, this includes but is not limited to²:
- Rocket
- Spinach
- Lettuce
- Radish
- Beetroot
- Chinese cabbage
- Turnips
- Cabbage
- Green beans
- Leek
- Spring onion
- Cucumber
- Carrot
- Potato
- Garlic
- Sweet pepper
- Green pepper
Day of the test
On the day of the test, it is recommended to avoid any of the following 1 hour before the test²:
- Eating
- Drinking
- Smoking
- Exercise
Note: It is recommended to perform a FeNO test before spirometry¹
Tips
Do not inhale through the nose before exhaling through the mouthpieces. Be seated and relaxed when taking the test.
References
- ATS/ERS Recommendations for Standardized Procedures for the online and offline measurement of exhaled lower respiratory nitric oxide and nasal nitric oxide, 2205. American journal of respiratory and critical care medicine. 2005;171(8):912-930.
- Lidder S, Webb A, Vascular effects of dietary nitrate (as found in green leafy vegetables and beetroot) viat the nitrate-nitrate-nitric oxide pathway. British Journal of Clinical Pharmacology. 2013;75(3):677-696
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