New Tests to Assess Lung Function

Abstract
FOWLER, who described the single-breath nitrogen test in 1949, proposed it as a useful test for abnormal intrapulmonary gas mixing and uneven ventilation.1 Since then, it has been used quite extensively both clinically and in several large epidemiologic studies. Recently, there has been renewed interest in the procedure because it offers promise of being able to detect airways obstruction at a potentially reversible stage and because it has become useful in clinical and epidemiologic research. The test as currently used2 is a modification of Fowler's technic and extends the scope of the original test considerably so that total lung capacity, . . .

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