title: Formaldehyde exposure in some educational hospitals of Tehran.
abstract: This research was conducted to determine formaldehyde exposure of staffs in pathology laboratories, surgery rooms and endoscopy wards in eight large hospitals of Tehran University of Medical Sciences located at Tehran, Iran. Air sampling have been made by both long and short-term methods. Total numbers of samples were 160 for both methods. Nineteen samples of 160 samples were collected as blank in other non-exposed environments such as administrative sections. The mean (SD) levels of formaldehyde in long-term methods were 0.96 (0.74), 0.25 (0.21) and 0.13 (0.18) ppm, at pathology laboratories, surgery rooms and endoscopy wards, respectively. The results of measurements showed that mean (SD) concentration of formaldehyde in one hour sampling at short intervals were 0.83 (0.29), 0.23 (0.16) and 0.75 (0.25) ppm at pathology labs, surgery rooms and endoscopy wards, respectively. There were significant differences in the mean levels of formaldehyde (long-term) at surgery rooms (p < 0.02) and endoscopy wards (p < 0.005) in eight hospitals of this study. It is concluded that the concentration levels of formaldehyde at pathology laboratories exceeded recommended limit which established by the American Conference of Governmental and Industrial Hygienists ACGIH (TLV-C = 0.3 ppm). It is recommended that local exhaust ventilation should be installed to minimize the contact to formaldehyde in the staffs.
authors.affiliation: Occupational Health Department, School of Public Health and Institute of Public Health Research, Tehran University of Medical Sciences, P.O.Box: 14155-6145 Tehran, I.R. Iran.
authors.forename: Mehdi
authors.initials: M
authors.lastname: Ghasemkhani
authors.forename: Farahnaz
authors.initials: F
authors.lastname: Jahanpeyma
authors.forename: Kamal
authors.initials: K
authors.lastname: Azam
mesh_terms: D000395:Air Pollutants, Occupational / Q000032:analysis*; D003430:Cross-Sectional Studies; D004724:Endoscopy / Q000706:statistics & numerical data; D004784:Environmental Monitoring; D005557:Formaldehyde / Q000032:analysis*; D006785:Hospitals, University / Q000706:statistics & numerical data*; D006801:Humans; D007492:Iran; D007755:Laboratories, Hospital / Q000706:statistics & numerical data; D008452:Maximum Allowable Concentration; D016273:Occupational Exposure / Q000032:analysis* / Q000706:statistics & numerical data; D009873:Operating Rooms / Q000706:statistics & numerical data; D010337:Pathology Department, Hospital / Q000706:statistics & numerical data; D012307:Risk Factors; D013997:Time Factors
chemical_list: D000395:Air Pollutants, Occupational; D005557:Formaldehyde