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Staff working in medical environments can be at risk of long term exposure to nitrous oxide (N2O). It is therefore essential that the maximum acceptable exposure level across an eight-hour period (time weighted average) is adhered to.
Piped gases (a mixture of nitrous oxide and oxygen) are frequently used as a sedative in medical facilities, as well as acting as an aid for breathing. The gases used must be of a high quality with no contamination.