Thompson J M, Sithamparanadarajah R, Hutton P, Robinson J S, Stephen W I
Br J Anaesth. 1981 Mar;53(3):235-40. doi: 10.1093/bja/53.3.235.
Contamination of the air with halothane in a poorly ventilated ENT theatre was found to be very great (median concentration 449 micrograms litre-1, 177 samples), but was reduced significantly (P less than 0.005) by the use of an active scavenger of patients' expired gases (median concentration 159 micrograms litre-1, 168 samples). For about 18% of the time when the theatre was in use, the halothane concentration in the air was greater than 1000 micrograms litre-1, whether or not the patients' expired gases were being scavenged. Although not measured quantitatively, this appeared to correspond approximately to the period of time in theatre when patients were not connected to the anaesthetic circuit.
在通风不良的耳鼻喉科手术室中，发现空气被氟烷污染的程度非常严重（中位数浓度为449微克/升，共177个样本），但通过使用患者呼出气体的主动清除装置，污染程度显著降低（P<0.005）（中位数浓度为159微克/升，共168个样本）。在手术室使用期间，约18%的时间里，无论患者呼出气体是否被清除，空气中氟烷浓度都大于1000微克/升。虽然未进行定量测量，但这似乎大致对应于患者未连接麻醉回路的手术室时间。
