title: Pollution of the medical air at a university hospital in the metropolitan Tokyo area.
abstract: OBJECTIVE
  To investigate the quality of medical air in a hospital in the metropolitan area.
  
  
  METHODS
  Prospective study.
  
  
  METHODS
  University hospital in the metropolitan Tokyo area.
  
  
  METHODS
  Medical air introduced into a bio-clean operating room was sampled.
  
  
  METHODS
  The concentrations of nitric monoxide (NO), nitrogen dioxide (NO(2)), sulfur dioxide (SO(2)), and carbon monoxide (CO) in the medical air were measured every 30 minutes for 15 days.
  
  
  RESULTS
  The concentrations (mean +/- SD) of NO, NO(2), SO(2), and CO were 34.4 +/- 35.0 ppb (range 0-200 ppb), 7.7 +/- 5.5 ppb (0-29 ppb), 33.8 +/- 2.9 ppb (21-46 ppb), and 1.65 +/- 0.87 ppm (0.5-7.5 ppm), respectively. The concentrations of these gases peaked at rush hours within a day.
  
  
  CONCLUSIONS
  In the metropolitan area, we occasionally provide our patients with medical air of poor quality.
authors.affiliation: Department of Anesthesia, Teikyo University School of Medicine Ichihara Hospital, Chiba, Japan. ynakata@med.teikyo-u.ac.jp
authors.forename: Yoshinori
authors.initials: Y
authors.lastname: Nakata
authors.forename: Yukari
authors.initials: Y
authors.lastname: Kawasaki
authors.forename: Koichi
authors.initials: K
authors.lastname: Matsukawa
authors.forename: Takahisa
authors.initials: T
authors.lastname: Goto
authors.forename: Yoshinari
authors.initials: Y
authors.lastname: Niimi
authors.forename: Shigeho
authors.initials: S
authors.lastname: Morita
mesh_terms: D016902:Air Pollution, Indoor / Q000032:analysis*; D002248:Carbon Monoxide / Q000032:analysis; D006785:Hospitals, University; D006801:Humans; D009569:Nitric Oxide / Q000032:analysis; D009585:Nitrogen Dioxide / Q000032:analysis; D009873:Operating Rooms; D011446:Prospective Studies; D013458:Sulfur Dioxide / Q000032:analysis; D013997:Time Factors; D014041:Tokyo; D014691:Ventilation
chemical_list: D013458:Sulfur Dioxide; D009569:Nitric Oxide; D002248:Carbon Monoxide; D009585:Nitrogen Dioxide