NIOSH's photostream  

In this photo a NIOSH employee uses a Spirometry machine to get an accurate reading. Spirometry is the most common pulmonary function test (PFT) and a plays a central role in occupational respiratory disease surveillance programs. Accurate spirometry testing, interpretation, and follow-up are critical to effective screening and surveillance of subjects exposed to respiratory hazards and to the management of patients by clinicians.

Kimberly C Thomas