Breathing patterns in people with exercise ‐induced laryngeal obstruction

We described the relationships between minute ventilation () versus tidal volume (VT) and versus carbon dioxide output (), using respectively quadratic and linear equations, and applied adjusted regression models to compare ergospirometry data and curve parameters. Compared to the no-EILO group, the group with EILO had prolonged inspiratory time (Tin), lower breathing frequency (Bf), lower , and lower inspiratory flow rate () at peak exercise. Mathematical modeling of the breathing pattern relationships was feasible in both groups, with similar coefficients of variation. For versusVT, the mathematical curve parameters were similar. For versus , the slope was similar but the intercept was lower in the EILO group. EILO was associated with prolongedTin, lowerBf, , and . The relationship between versusVT was similar, whereas for versus , the slope was almost parallel but shifted downward for the EILO group. Most ergospirometry data overlapped, except which discriminated between EILO and no-EILO in a promising way.

Source: Physiological Reports - November 25, 2021 Category: Physiology Authors: Astrid Haugen Lie, Ingvild Gr ønnevik, Bente Frisk, Ola Drange Røksund, Ida Hammer, Maria Vollsæter, Thomas Halvorsen, Hege H. Clemm Tags: ORIGINAL ARTICLE Source Type: research