Abstract
Nine volunteer subjects underwent psychomotor testing when wearing an integral crash helmet in a variety of conditions which lead to rebreathing. There was a wide individual variation in the extent of rebreathing. In the worst conditions the minimum inspired carbon dioxide tension (PICO2) increased to 2.6 kPa. The psychomotor test was a tracking test based on a microcomputer. There was a significant deterioration in the ability to perform the test when the helmet was worn with the visor down and restricted airflow into the helmet (P = less than 0.05). In those tests when the minimum PICO2 exceeded 0.5 kPa the decrease in performance was more highly statistically significant (p = less than 0.005). Rebreathing wearing integral crash helmets results in a variable impairment in the subjects' ability to perform a tracking test. We recommend that the maximum level of CO2 retention inside integral crash helmets should not exceed 0.5 kPa minimum PICO2.
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Selected References
These references are in PubMed. This may not be the complete list of references from this article.
- Greenbaum R., Malins A. F., Davies R., Baskett P. J. Rebreathing in a subject wearing an integral crash helmet. Br Med J (Clin Res Ed) 1982 Mar 13;284(6318):774–775. doi: 10.1136/bmj.284.6318.774. [DOI] [PMC free article] [PubMed] [Google Scholar]