Recent institution of the use of nitrous oxide (no) for laboring mothers was followed by badge testing to measure the amounts of no in 2 areas on the patient room and the exposure to the nurse attending to the patient.An independent report was received indicating that 7 of 18 readings exceeded national institute for occupational safety and health (niosh) recommendations of 25ppm of no over the duration of the exposure.The program was suspended the following day.It is not currently known if the equipment used contributed to these exposures.
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