Firstly, the lungs expand with care,
Drawing in oxygen from the air.
Then, forced vital capacity flows,
The full exhalation that life bestows.
Meanwhile, FEV₁ marks the speed,
A first-second measure, a vital need.
Next, the ratio unveils the line,
Between obstructive and restrictive design.
Moreover, PEF sets the pace,
Peak flow tracing each breath’s race.
Similarly, lung volumes extend,
Revealing capacities on which we depend.
Total lung capacity stands supreme,
An inhaled vision, a respiratory dream.
However, residual volume stays behind,
Anchoring breaths, a tether confined.
In addition, diffusion holds the key,
As gas exchange measures efficiency.
Thus, DLCO guides our gaze,
Through alveolar sacs and diffusion’s maze.
Airway resistance, next in line,
Shows how freely airways align.
Meanwhile, compliance softly bends,
Elasticity’s song, where the lung contends.
Finally, MVV tests the might,
A breath’s endurance, day or night.
Consequently, PFTs become the art,
Of measuring life’s most vital part.
Altogether, these values unfold,
Stories of lungs, in whispers bold.
Therefore, with each test, the truth we find,
Of breaths sustained, of health defined.
