Hematologic Abnormalities from Fire Extinguisher Gas Exposure
Author Information
Author(s): Lo Shih-Hsiang, Chan Chang-Chuan, Chen Wei-Chin, Wang Jung-Der
Primary Institution: National Taiwan University
Hypothesis
What are the hematologic effects of exposure to mixed fire extinguishants containing bromotrifluoromethane, bromochlorodifluoromethane, and dichlorodifluoromethane?
Conclusion
The study found that residents exposed to fire extinguisher gas experienced a significant reduction in red blood cells and hemoglobin, which improved over nine months.
Supporting Evidence
- 91 of the exposed residents returned for follow-up examinations nine months later.
- Significant improvements in red blood cell counts and hemoglobin levels were observed.
- The study ruled out other potential causes of anemia such as iron-deficiency anemia and thalassemia.
Takeaway
Some people got sick after breathing in gas from fire extinguishers, but they got better after a while.
Methodology
The study involved physical examinations and blood tests of 117 exposed residents and matched controls, with follow-up examinations nine months later.
Potential Biases
Potential selection bias due to the response rate of 66% for the questionnaire.
Limitations
The study did not determine if the anemia was hemolytic or caused by marrow injury at the time of first occurrence.
Participant Demographics
Residents from Taipei, Taiwan, aged 15 years and older.
Statistical Information
P-Value
p<0.001
Statistical Significance
p<0.001
Digital Object Identifier (DOI)
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