Nitrous oxide neurotoxicity studies in man and rat

Peter J Dyck, L. A. Grina, E. H. Lambert, C. S. Calder, K. Oviatt, K. Rehder, B. A. Lund, K. A. Skau

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Abstract

To assess the effects of chronic exposure to low levels of nitrous oxide on neural function of man, the authors evaluated the neurologic condition, motor and sensory nerve conduction, and computerized tests of sensation of approximately half of the dentists in Rochester, Minnesota. Results of scored tests of neural function were not significantly different for dentists who used nitrous oxide extensively in their practices and dentists who did not. To assess the effects of chronic exposure to high levels of nitrous oxide on neural function and structure of experimental animals, groups of rats were exposed to 70 per cent N 2O in 30 percent oxygen for four hours, fives days a week, for six months. Rats exposed to N 2O and control rats showed no difference in well-being, in caudal nerve conduction, in axonal content and transport of acetylcholinesterase and dopamine-β-hydroxylase, or in number and size distribution and pathologic abnormality of teased myelinated fibers. Although these results indicate a lack of peripheral nerve neurotoxicity of N 2O in the rat, one cannot assume a similar lack of neurotoxicity in man with heavy exposures.

Original languageEnglish (US)
Pages (from-to)205-209
Number of pages5
JournalAnesthesiology
Volume53
Issue number3
StatePublished - 1980

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ASJC Scopus subject areas

  • Anesthesiology and Pain Medicine

Cite this

Dyck, P. J., Grina, L. A., Lambert, E. H., Calder, C. S., Oviatt, K., Rehder, K., Lund, B. A., & Skau, K. A. (1980). Nitrous oxide neurotoxicity studies in man and rat. Anesthesiology, 53(3), 205-209.