Centre for Animal Welfare and Ethics, School of Veterinary Sciences, University of Queensland, Gatton, Queensland 4343, Australia.
Meat and Livestock Australia, Brisbane, Queensland, Australia.
Meat Sci. 2014 Mar;96(3):1201-9. doi: 10.1016/j.meatsci.2013.10.030. Epub 2013 Oct 29.
We present results from the development of a new system of reversible electrical stunning of cattle. A single-pulse ultra-high current (SPUC) was generated from a capacitance discharge current spike of at least 5000 V at 70 A, for approximately 50 ms. Ninety-seven cattle were stunned in three experimental protocols. With improvements made to the design of the stun box and charge delivered, 38 cattle were either stunned and immediately jugulated or monitored for signs of reappearance of brain stem reflexes at which point a concussion stun was administered. This use of the SPUC charge, provided as a biphasic-pulse waveform, resulted in a high level of stunning efficacy, with unconsciousness lasting for up to 4 min. These results were supported by EEG data taken from a subsequent cohort of stunned cattle. The SPUC stun also apparently eliminated post-stun grand mal seizures that can occur following short-acting conventional electrical stun, with its associated negative consequences on operator safety and meat quality.
我们介绍了一种新的牛可逆电致昏系统的开发结果。单脉冲超高压电流（SPUC）由至少 5000V 的电容放电电流尖峰产生，电流为 70A，持续约 50ms。97 头牛在三个实验方案中被电昏。通过改进电箱和充电设计，38 头牛被电昏并立即放血，或监测脑干反射是否恢复，如果出现这种情况，则给予脑震荡电昏。这种使用 SPUC 电荷的方法，采用双相脉冲波形，可达到很高的电昏效果，使动物失去意识长达 4 分钟。这些结果得到了随后一组被电昏的牛的 EEG 数据的支持。SPUC 电昏似乎还消除了短时间作用的常规电击后可能发生的电昏后全身性强直阵挛发作，这对操作人员的安全和肉品质量有负面影响。
