Low flow anaesthesia reduces occupational exposure to inhalation anaesthetics : environmental and biological measurements in operating room personnel.
In the present study we evaluated the occupational exposure to N2O and isoflurane during open circult (OC) (fresh gas flow = minute volume) and low flow (LF) (fresh gas flow=1.5 l/min) anaesthesia.
The effects of active scavenging and of a charcoal filter positioned on the exhausting branch of the ventilator on environmental and urinary concentrations of inhalation anaesthetics were also investigated.
The study was carried out in the same operating room provided with non-recirculating air changes (10 per hour).
It involved anaesthetists and nurses during routine activity.
N2O and isoflurane concentrations (time-weighted averagers were measured after 3-hour continuous exposure : 1) in the environment at the level of the personnel's breathing zone (Ci) ; 2) in the environment at the ventilator zone (C) ; 3) in urine (Cu).
Our data show that LF anaesthesia reduces the exposure of the operating room personnel to inhalation anaesthetics.
A charcoal filter positioned on the exhausting branch of the ventilator in substitution of the active scavenging is very effective in reducing isoflurane pollution.
The evaluation of the urinary concentration of inhalation anaesthetics is a simple and reliable method of monitoring occupationally exposed personnel.
Mots-clés Pascal : Anesthésique général, Composé volatil, Exposition professionnelle, Azote protoxyde, Isoflurane, Personnel sanitaire, Circuit ouvert, Circuit anesthésie, Toxicité
Mots-clés Pascal anglais : General anesthetic, Volatile compound, Occupational exposure, Nitrogen protoxide, Health staff, Open circuit, Anesthetic circuit, Toxicity
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 95-0361930
Code Inist : 002B02U10. Création : 01/03/1996.