Respiratory heat loss is not the sole stimulus for bronchoconstriction induced by isocapnic hyperpnea with dry air.

It is uncertain if respiratory heat loss or respiratory water loss is the stimulus for bronchoconstriction induced by isocapnic hyperpnea or exercise with dry air in subjects with asthma. We partially separated these 2 stimuli by having 18 subjects with asthma breathe dry air (0 mg/L water content) at increasing ventilations by isocapnic hyperpnea while we… CONTINUE READING