feNO testing for asthma diagnosis and monitoring

feNO testing is the gold standard test for diagnosis of asthma.

What Is FeNO?

FeNO stands for fractional exhaled nitric oxide. A feNO test measures this nitric oxide. When your airways are inflammed as is the case with asthma, higher levels of nitric oxide are released and measured in exhaled air.

How Is FeNO Testing Done?

A FeNO test is a quick and simple test using a hand held device. The patient, a child or adult can use the device very easily and the device indicates if you are blowing too hard or too little so the perfect sample is recorded.

What Does Checking FeNO Levels Do?

If you have already been diagnosed with asthma, tracking your FeNO levels:

• Helps determine if you are taking the correct medication at the required level.
• It can also track your airway inflammation over time

If you have not been diagnosed with asthma, a FeNO test:

• Can significantly help confirm or refute a diagnosis of asthma.
• Helps determine how well you may respond to corticosteroids

Should I Get a FeNO Test?

Talk to your doctor about having a FeNO test if:

• You or your child have respiratory symptoms that won’t go away and you are uncertain if you have asthma
• You have asthma but your current treatment is not adequately controlling your symptoms.