Spirometric surveillance in hazardous materials firefighters: does hazardous materials duty affect lung function?

Area of Science:

• Occupational Health
• Pulmonary Medicine
• Environmental Health

Background:

• Firefighters, particularly hazardous materials (HazMat) technicians, may be exposed to respiratory irritants.
• Assessing the long-term impact of this exposure on pulmonary function is crucial for occupational health surveillance.

Purpose of the Study:

• To compare the longitudinal changes in pulmonary function between HazMat technicians and support staff.
• To determine if HazMat technicians experience a more rapid decline in lung function compared to a less exposed control group.

Main Methods:

• Analysis of spirometry data (forced vital capacity and forced expiratory volume in 1 second) from 351 male firefighters (276 technicians, 75 support) from 1996-1999.
• Cross-sectional and longitudinal comparisons of pulmonary function metrics between technicians and support members.
• Support members, with limited HazMat exposure, served as referents.

Main Results:

• Cross-sectional analysis showed technicians' lung function was not significantly different from or was better than support members.
• Longitudinally, forced vital capacity showed no statistically significant differences between groups.
• A 3% decrease in mean percent predicted forced expiratory volume in 1 second was observed in technicians, but this was not significantly different from the decline in support controls.

Conclusions:

• Hazardous materials technicians do not exhibit an accelerated rate of pulmonary function loss compared to support firefighters.
• Findings suggest that current medical surveillance protocols are adequate in monitoring lung health in HazMat personnel.
• Further research could explore specific exposure levels and their correlation with subtle pulmonary function changes.