笑気から生成するNOxによる手術室内空気汚染の可能性 : その2,NOx生成への電気メスの影響

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We studied the extent of NOx generation by high energy radiation from surgical electric knife. The concentrations of NOx varied from 0.2 to 7.2ppm depending upon the output power at a sampling spot very close to the knife pole contacted with piece of beef under an atmosphere of constant has flow comprised of 41/min of N_2O and 21/min of O_2 from the outlet close to the knife pole.When the pole was contacted directly to the grounding plate resulting in a very violet sparking. the highest NOx levels were 13.9 and 20.0ppm, in the atmosphere free from an mixed with nitrous oxide, respectively.In several dogs under general anesthesia with 41/min of N_2O and 21/min of O_2,supplemented with muscle relaxants, NOx concentrations were measured by applying the knife on subcutaneous tissues, abdominal muscles, muscles in lower extremity, intraabdominal fat tissues and small intestines. By the levels of NOx measured, we can classify them into two groups, one with higher than 2.4ppm and the other with lower than 0.4ppm. The former group includes muscular tissues and small intestines, and the latter does subcutaneous and intraabdominal fat tissues. These results reflect a tendency of nitrous oxide released from organs, and its degree obvioulsy depends on the extent of blood supply to them.The NOx levels described abve are of so close to knife pole that, considering dilution, the ambient air the operating room personnel breathe is not of health concern. But further studies on these phenomena seems to be mandatory.
日本医療機器学会の論文
1981-10-01

笑気から生成するNOxによる手術室内空気汚染の可能性 : その2,NOx生成への電気メスの影響

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