Université Clermont Auvergne, INRAE, VetAgro Sup, UMR Herbivores, F-63122 Saint-Genès-Champanelle, France.
Université Clermont Auvergne, INRAE, VetAgro Sup, UMR Herbivores, F-63122 Saint-Genès-Champanelle, France.
Meat Sci. 2021 May;175:108452. doi: 10.1016/j.meatsci.2021.108452. Epub 2021 Jan 29.
The present study used thirty-one pigs to investigate induction of unconsciousness and behavioural reactions in different gas mixtures: 80% CO/air, 90 s; 40% CO/30% O/air, 180 s; 70% NO/30% CO, 90 s. All pigs lost consciousness. All presented respiratory difficulties and most pigs involuntary muscle contractions, often before loss of standing posture. Between mixtures, average latencies of certain behaviours and delays between behaviours differed. Following immersion, blood pH was lower than normal. The low pH induced by the CO/O/air mixture was physiologically associated with hyperoxemia. Relationships between blood gases, different behavioural and heart rate responses are discussed. In conclusion, all mixtures caused discomfort due to respiratory difficulties and the addition of O or NO to the CO mixture did not present an advantage.
本研究使用 31 头猪来研究不同气体混合物诱导的无意识和行为反应：80% CO/空气，90 秒；40% CO/30% O/空气，180 秒；70% NO/30% CO，90 秒。所有猪都失去了知觉。所有猪都出现呼吸困难，大多数猪出现不随意肌肉收缩，通常在失去站立姿势之前。在混合气体之间，某些行为的平均潜伏期和行为之间的延迟不同。浸泡后，血液 pH 值低于正常水平。CO/O/空气混合物引起的低 pH 值与高氧血症生理相关。讨论了血液气体、不同行为和心率反应之间的关系。总之，由于呼吸困难，所有混合物都引起不适，而在 CO 混合物中添加 O 或 NO 并没有带来优势。
