|Document ID (ISN)||104950|
|ISSN - Serial title
||1545-9624 - Journal of Occupational and Environmental Hygiene
|Convention or series no.
||Chessor E., Verhoeven M., Hon C.Y., Teschke K.
||Evaluation of a modified scavenging system to reduce occupational exposure to nitrous oxide in labor and delivery rooms
||June 2005, Vol.2, No.6, p.314-322. Illus. 22 ref.
||A new scavenging mask was developed for the administration of nitrous oxide to mothers-to-be during labour in order to minimize leakage of the patient's exhaled breath into the room and staff exposure. The scavenging system was designed with an inner mask for gas delivery, an outer mask to capture exhaled breath and a continuous exhaust airflow based on breathing flow rates. It was tested by measuring exposures of 30 nurses and 33 room air concentrations, while patients self-administered nitrous oxide either through the conventional or modified scavenging system. The new scavenging system significantly reduced exposures in the room and to nurses (concentrations of 39.7ppm and 40.2ppm, respectively, compared with 82.2ppm and 69.3ppm, respectively, for the conventional system). Additional modifications to the scavenging system may further reduce nitrous oxide concentrations and improve comfort and usability.
||nitrous oxide; determination in air; hospitals; limitation of exposure
||description of equipment; exposure evaluation; personal sampling
||D - Periodical articles
|Country / State or Province||Canada; Netherlands|
||Toxic and dangerous substances
|Broad subject area(s)
||Health care services