Erhardt W, Ring C, Kraft H, Schmid A, Weinmann H M, Ebert R, Schläger B, Schindele M, Heinze R, Lomholt N
Dtsch Tierarztl Wochenschr. 1989 Mar;96(3):92-9.
For investigations of CO2-stunning of feeder- and slaughter-pigs parameters of behaviour, blood-gas-analyses and electroencephalograms were chosen. The following results were obtained: 1. Blood-gas-analyses proved that the CO2-stunning does not produce unconsciousness due to a lack of oxygen. 2. The criterias of general anaesthesia: unconsciousness, muscle-relaxation and analgesia with total reversibility could be confirmed. 3. The violent convulsive symptoms were evaluated as reactions identical with the stage II of GUEDEL's scheme of anaesthesia. 4. Muscular agitation, which sometimes appeared a few seconds before the stage of excitation, was judged to belong either to the start of the excitation phase or to the end of Guedel's stage of analgesia, during which the sensitivity is decreased. Neither study of behavior nor objective measurements showed, during the first 10 to 20 seconds of exposure to the CO2, any sign of pain or suffering related to the Act for Prevention of Cruelty to Animals, and accordingly such suffering should not be ascribed to the CO2 stunning method.
为了研究育肥猪和屠宰猪的二氧化碳致晕情况，选取了行为参数、血气分析和脑电图等指标。得到了以下结果：1. 血气分析证明，二氧化碳致晕并非因缺氧导致意识丧失。2. 全身麻醉的标准：意识丧失、肌肉松弛和具有完全可逆性的镇痛作用均得到了证实。3. 剧烈的惊厥症状被评估为与古德尔麻醉分期方案第二阶段相同的反应。4. 有时在兴奋期前几秒出现的肌肉躁动，被判定要么属于兴奋期的开始，要么属于古德尔镇痛期的结束，在此期间敏感性降低。在暴露于二氧化碳的最初10至20秒内，行为研究和客观测量均未显示出与《防止虐待动物法》相关的任何疼痛或痛苦迹象，因此，不应将此类痛苦归咎于二氧化碳致晕方法。
