title: [Specific clinical course of occupational toxic dust bronchitis in workers exposed to wolfram and cobalt].
abstract: Chronic toxic dust bronchitis in workers exposed to wolfram and cobalt has been progressing in the course of many-year exposure to hazardous occupational factors. Its prevalence among the main-occupation workers is 2.2-fold higher versus workers of the control group who have never contacted the metal aerosols. The disease onset is slow and gradual in an overwhelming majority of cases and has the below clinical-and-functional peculiarities: 1) predominance of dyspnea over cough in the early bronchitis stage; 2) an early and often development of the concurrent asthmatic component; 3) subjective symptoms are far ahead of objective examination findings in the early disease stage; 4) obstructive changes in the distal sections of the air-conducting system (maximum-air-velocity volume75), if detected in latent bronchitis, can be a basis for an early disease diagnosis; 5) as well as lower key hemodynamic parameters and development of the hypokinetic blood circulation type, whereas, compensatory hyperfunctioning of the myocardium and the hyperkinetic blood circulation type are found in patients with occupational dust bronchitis working in other productions.
authors.forename: N A
authors.initials: NA
authors.lastname: Roslaia
mesh_terms: D001991:Bronchitis / Q000175:diagnosis / Q000209:etiology / Q000503:physiopathology; D003035:Cobalt / Q000009:adverse effects*; D003937:Diagnosis, Differential; D004391:Dust; D006801:Humans; D007221:Industry; D009784:Occupational Diseases / Q000175:diagnosis*; D014414:Tungsten / Q000009:adverse effects*
chemical_list: D004391:Dust; D003035:Cobalt; D014414:Tungsten