Traduction en anglais : Occupational exposure of operating theatre personnel to nitrous oxide.
Epidemiological studies have shown that trace concentrations of inhalation anaesthetics polluting the air of operation theatre could have adverse effects on the personnel's health.
There is a lack of data concerning measurements of trace concentrations under defined conditions.
The aim of this study was to quantify levels of N2O in an operating theatre (OT) under modern working environment conditions.
Trace concentrations of N2O were determined in the OT at three personnel-related and three potential leakage related points and TWA's were calculated.
Trace concentrations of N2O were measured directly by means of a highly sensitive photoacoustic infrared spectrometry analyser.
The lower detection limit was 0.03 ppm.
Values were below 100ppm TWA at personnel-related locations.
NIOSH 25ppm threshold limit value was exceeded several times.
Significant differences between location surgeon and anaesthetist and auxiliary nurse were detected (p<0.05, Wilcoxon test).
Exposure to N2O in a climatised OT is determined by several factors : 1. Efficacy of the air-conditioning with 20 changes per hour without recirculation, 2. OT size, 3. low leakage anaesthesia machine, and 4. avoidance of intermittent nitrous oxide supply during induction.
Mots-clés Pascal : Azote protoxyde, Anesthésique général, Gaz, Exposition professionnelle, Homme, Personnel sanitaire, Bloc opératoire, Milieu hospitalier, Concentration maximale admissible, Contrôle, Lieu travail, Teneur air ambiant, Analyse quantitative, Médecine travail
Mots-clés Pascal anglais : Nitrogen protoxide, General anesthetic, Gases, Occupational exposure, Human, Health staff, Operating room, Hospital environment, Maximum permissible concentration, Check, Work place, Ambient air concentration, Quantitative analysis, Occupational medicine
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 95-0362111
Code Inist : 002B02U10. Création : 01/03/1996.