A study in 84 patients with dust-induced bronchitis receiving combined drug treatment, hyperbaric oxygenation, hypobarotherapy and artificial speleotherapy indicates that the first place by its efficacy is occupied by artificial speleotherapy resulting in an improvement of the functional indices of the cardiopulmonary system. The second place is occupied by hypobaric regimen. Hyperbaric oxygenation was of low efficacy.

Tolmach, Bondarenko, Aleksanova, Demidov, Denisenko, Taushan, Soboleva, , (1990). [The results of the combined treatment of patients with dust-induced bronchitis]. Vrachebnoe delo, 1990 Jun;(6):42-4. https://www.ncbi.nlm.nih.gov/pubmed/2399718