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  • Title: Faulty anesthesia circuits: a source of environmental pollution in the operating room.
    Author: Cottrell JE, Chalon J, Turndorf H.
    Journal: Anesth Analg; 1977; 56(3):359-62. PubMed ID: 559434.
    Abstract:
    Commonly used disposable anesthesia circuits were studied for leak and gas spillage. Trace anesthetic gas concentrations produced by these circuits in the anesthesiologist's breathing zone were analyzed by a Hewlett-Packard Gas Chromatograph. These measurements demonstrated ambient halothane (3.29 +/- 0.1 ppm) and N2O (333.5 +/- 2.31 ppm) concentrations well above target levels, when swivel-type disposable anesthesia circuits were used, despite the presence of standard gas-scavenging devices and appropriate operating room fresh air exchange rates. Lower ambient concentration levels (0.38 +/- 0.03 ppm halothane and 31.3 +/- 1.49 ppm N2O) were measured when Y-type disposable anesthesia circuits were used.
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