Exams are conducted prior to respirator use and periodically thereafter to determine if there have been any changes in health or physical condition . The exam should also address any history of respiratory disease work history that may include possible exposure to substances causing respiratory disease and other medical information such as symptoms of claustrophobia , physical deformities or abnormalities affecting respirator use , use of medication , and tolerance of heat stress . While good physical health is important to the safety of the...











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