title: [Low flow anesthesia and environmental pollution].
abstract: OBJECTIVE
  The aim of the present study is to evaluate operating room pollution and isoflurane and N2O consumption in open system and low flow anesthesia.
  
  
  METHODS
  Environmental concentration of N2O and isoflurane were measured in an operating room of 150 m3 with 10 air changes by an infrared gas analyser (Brüel & Kjaer) in open system and in low flow anesthesia. Accurate measurement of ihalatory anaesthetic and N2O consumption was made.
  
  
  RESULTS
  Concentrations of N2O and isoflurane in operating room were 4.83 ppm and 0.4 ppm respectively, lower compared with open systems: 301 ppm and 11.1 ppm respectively. Isoforane consumption was 25 cc in five hours during low flow anaesthesia, lower compared with open system: 125 ppm, N2O consumption was 4 l/m in open system, 1 l/m in low flow anaesthesia.
authors.affiliation: Unità Operativa di Medicina del Lavoro, Università degli Studi di Catania.
authors.forename: L
authors.initials: L
authors.lastname: Proietti
mesh_terms: D000393:Air Pollutants / Q000032:analysis*; D018685:Anesthetics, Inhalation / Q000032:analysis*; D006801:Humans; D007530:Isoflurane / Q000032:analysis*; D009609:Nitrous Oxide / Q000032:analysis*; D009873:Operating Rooms
chemical_list: D000393:Air Pollutants; D018685:Anesthetics, Inhalation; D007530:Isoflurane; D009609:Nitrous Oxide