TITLE

Occupational exposure of midwives to nitrous oxide on delivery suites

AUTHOR(S)
Henderson, K. A.; Matthews, I. P.; Adisesh, A.; Hutchings, A. D.
PUB. DATE
December 2003
SOURCE
Occupational & Environmental Medicine;Dec2003, Vol. 60 Issue 12, p958
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Aims: To compare environmental and biological monitoring of midwives for nitrous oxide in a delivery suite environment. Methods: Environmental samples were taken over a period of four hours using passive diffusion tubes. Urine measurements were taken at the start of the shift and after four hours. Results: Environmental levels exceeded the legal occupational exposure standards for nitrous oxide (100 ppm over an 8 hour time weighted average) in 35 of 46 midwife shifts monitored. There was a high correlation between personal environmental concentrations and biological uptake of nitrous oxide for those midwives with no body burden of nitrous oxide at the start of a shift, but not for others. Conclusions: Greater engineering control measures are needed to reduce daily exposure to midwives to below the occupational exposure standard. Further investigation of the toxicokinetics of nitrous oxide is needed.
ACCESSION #
12181185

 

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