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Pulmonary function tests: Fractional exhaled nitric oxide (FeNO) test

You have had the nitric oxide content in your exhaled air measured.

Nitric oxide is a gas that occurs in very small amounts in the air and the body. In the body it is produced in the airways, for instance. Certain illnesses affect how much nitric oxide is produced in the airways. When you breathe out, the nitric oxide gets from the airways into the exhaled air. So the exhaled air can be measured to see how much nitric oxide has been produced in the airways.

Additional indicator

If necessary, additional letters are appended to OPS codes to indicate which side of the body is affected.

  • L: Left
  • R: Right
  • B: Both sides

Further information

Note

Your doctor will assist you with any health-related questions and explain the OPS code to you in a direct consultation if necessary.

Source

Provided by the non-profit organization “Was hab’ ich?” gemeinnützige GmbH on behalf of the Federal Ministry of Health (BMG).