Acute and chronic effects of fire fighting on pulmonary function

Area of Science:

• Occupational Health
• Pulmonary Medicine
• Environmental Health

Background:

• Firefighters face significant occupational exposures.
• Pulmonary function impairment is a concern for firefighters.
• Smoking exacerbates respiratory risks in this population.

Purpose of the Study:

• To investigate the acute and chronic effects of firefighting on pulmonary function.
• To assess the role of smoking in airway obstruction among firefighters.
• To evaluate the impact of acute and chronic exposures on lung health.

Main Methods:

• Pulmonary function tests, including maximum expiratory flow-volume curves (breathing air and helium-oxygen mixture), were conducted.
• Study included 54 firefighters (32 smokers, 22 nonsmokers).
• Evaluated changes after mild acute exposure and assessed long-term effects in chronic exposure groups.

Main Results:

• Small airway obstruction was found in 35% of smokers and 13% of nonsmokers.
• Nonsmokers with obstruction had over 25 years of service and no respiratory complaints.
• Mild acute exposure showed no significant pulmonary function changes, but one severe acute exposure resulted in persistent obstructive defect.

Conclusions:

• Cigarette smoking is a major contributor to airway obstruction in firefighters.
• Chronic exposure may lead to small airway disease, particularly in long-serving firefighters.
• Severe acute exposure can cause irreversible pulmonary injury, warranting further long-term investigation.