Lung function measurements over 21 days shiftwork in steelworkers from a strandcasting department

Area of Science:

• Occupational Health
• Pulmonary Medicine
• Environmental Health

Background:

• Short-term lung function changes may predict long-term decline.
• Steelworkers in strandcasting departments face significant dust exposure (mean 11.8 mg/m3).

Purpose of the Study:

• To investigate the evolution of lung function indices in steelworkers exposed to dust compared to a control group.
• To assess the impact of different work shifts (morning, afternoon, night) on lung function over a 21-day period.

Main Methods:

• Longitudinal study of 25 exposed steelworkers and 11 controls over 21 days.
• Measurement of spirometric indices (VC, FEV1, FEV3, FEF25-75, PEFR) and single breath tests (delta N2, CV).
• Examinations conducted at the beginning, middle, and end of morning, afternoon, and night shifts.

Main Results:

• Exposed workers showed significant decreases in FEF25-75 and FEV3 over 21 days, not significantly greater than controls.
• Significant spirometric declines occurred in the exposed group during afternoon shifts, unlike controls.
• Pronounced decreases in FEV1 and FEF25-75 were observed during night shifts in the exposed group compared to controls, suggesting slight airway obstruction.

Conclusions:

• Occupational dust exposure in steelworkers may lead to reversible airway obstruction, particularly evident during night shifts.
• The findings suggest that night shift work exacerbates the negative effects of dust exposure on lung function.
• Further research is needed to confirm the long-term implications and to develop targeted interventions for protecting worker respiratory health.