A test where a patient breathes in and blows out as hard and long as possible into a machine that measures lung function is called

A test where a patient breathes in and blows out as hard and long as possible into a machine that measures lung function is called

• A. X-ray
• B. Pulmonary Function Test
• C. Spirometry
• D. MRI

Answer: (B)

This describes a broad evaluation of how well the lungs work by measuring air flow and volumes with a breathing device, which is best labeled as a Pulmonary Function Test. A PFT is a group of tests that assess lung function, including spirometry, lung volumes, and diffusion capacity. The scenario—breathing in and then exhaling forcefully into a machine to gauge lung performance—fits the overall testing category, not just a single measurement.

Spirometry is a specific test within a PFT that focuses on the forced exhalation and gives values like FEV1 and FVC. The imaging options (X-ray and MRI) look at structure, not functional airflow, so they don’t match the description of measuring lung function via a mouthpiece and instrument.