That is the correct spelling of "spirometry" (breathing measurement).

Spirometry is a diagnostic method for measuring gases and respiratory function. Incentive spirometry may be ordered to help patients practice and improve controlled breathing.

The suffix "-metry" in the term spirometry means "measurement." In spirometry, it refers to the process of measuring the volume of air that moves in and out of the lungs during breathing.

Spirometry is covered in medical sciences. Spirometry is a test of the lungs. It's done by putting a plug on the nose, directing all the air to go to the mouth. It measures lung function.

Yes. It is noninvasive.