Dinnis A S, Stafford K J, Mellor D J, Bruce R A, Ward R N
Department of Physiology and Anatomy, Massey University, Palmerston North, New Zealand.
Aust Vet J. 1997 Jul;75(7):494-6. doi: 10.1111/j.1751-0813.1997.tb14380.x.
To measure the plasma cortisol response in lambs castrated and docked by three different methods (ring castration and tail docking, ring and clamp castration and tail docking; ring and clamp castration and ring tail docking) for 4 h after treatment.
A physiological study with controls.
A rubber ring was applied to the scrotum. Then the castration clamp was placed, distal to the ring, on each spermatic cord such that there was no overlap of the crush lines.
There were no differences in the cortisol secretion of the lambs castrated and tail docked by the ring only and by the ring plus castration clamp methods. Using the castration clamp in addition to the ring on the tail had no effect on cortisol secretion.
Using the castration clamp did not appear to reduce the cortisol response to ring castration and docking, as demonstrated elsewhere, because the areas of uncrushed tissue between the two castration clamp crush lines allowed nociception from ischemic scrotal tissue to be transmitted cranially via undamaged nerve fibers.
测量采用三种不同方法（环形去势与断尾；环形与钳夹式去势及断尾；环形与钳夹式去势及环形断尾）对羔羊进行去势和断尾处理后4小时血浆皮质醇的反应。
一项设有对照组的生理学研究。
在阴囊上套上一个橡胶环。然后将去势钳置于环的远端，分别夹在每条精索上，使挤压线不重叠。
仅用环形法以及环形加钳夹式法对羔羊进行去势和断尾处理后，其皮质醇分泌没有差异。在尾部除使用环外还使用去势钳对皮质醇分泌没有影响。
如在其他地方所证明的，使用去势钳似乎并未降低对环形去势和断尾的皮质醇反应，因为两条去势钳挤压线之间未受挤压的组织区域使来自缺血阴囊组织的伤害性刺激能够通过未受损的神经纤维向头端传导。
