Amines: possible causative agents in the development of bronchial hyperreactivity in workers manufacturing polyurethanes from isocyanates.

Evaluation of the Effect of Onosma Bracteatum Wall (Boraginaceae) On Bronchial Hyperreactivity in Sensitized Guinea Pigs

Asthma is a chronic inflammatory disorder of the airways. The available treatment options have major limitations owing to low efficacy, associated adverse events and compliance issues. Therefore, the health burden of bronchial asthma is increasing globally at an alarming rate, providing a strong impetus for the development of new therapeutics. Onosma bracteatum ( O. bracteatum ) is know...

Persistence of toluene diisocyanate-induced asthma despite negligible workplace exposures.

Six polyurethane foam workers were shown to have TDI-induced asthma by specific inhalation challenge testing. All remained in the workplace in jobs with minimal TDI exposures. Mean and time-weighted average exposure concentration for the asthmatic group was 0.64 +/- 0.46 ppb, less than 5 percent of the permissible exposure limit and significantly less (p less than 0.01) than the mean TWA exposu...

Clinical and immunological evaluation of isocyanate-exposed workers.

Isocyanates are the most significant cause of occupational asthma in our country. To evaluate the prevalence of work-related respiratory symptoms and immunologic sensitization to it, we performed a questionnaire survey, allergy skin test, radioallergosorbent test (RAST) to toluene diisocyanate (TDI)-human serum albumin (HSA) conjugate and methacholine bronchial challenge test on 23 isocyanate-e...

Do amines induce occupational asthma in workers manufacturing polyurethane foams?

Impairment in workers with isocyanate-induced occupational asthma and removed from exposure in the province of Québec between 1985 and 2002.

OBJECTIVE The objective of this project was to assess both the outcome for patients diagnosed with proven isocyanate-induced occupational asthma (IIOA) by specific inhalation challenge (SIC) and the functional impairment, 2 years after cessation of exposure to isocyanates, using the compensation insurance scale proposed in the province of Quebec. METHODS We used a retrospective cohort of 233 ...