Robertson I S, Kent J E, Molony V
Department of Veterinary Clinical Studies, Royal (Dick) School of Veterinary Studies, University of Edinburgh, Summerhall.
Res Vet Sci. 1994 Jan;56(1):8-17. doi: 10.1016/0034-5288(94)90189-9.
Calves of six, 21 and 42 days were either handled (controls) or castrated by Burdizzo, by surgical or by rubber ring techniques and their behaviour and plasma cortisol monitored for three hours after treatment. The rubber ring caused significant increases in active behaviour and abnormal postures for two hours compared with handled or castrated by Burdizzo and surgical techniques, and surgical techniques resulted in a significant increase in abnormal standing, particularly in the first 30 minutes. Abnormal behaviour and posture were recorded less frequently in six-day-old calves. The mean cortisol peaks for six-, 21- and 42-day-old calves were, respectively, 36, 31 and 23 nmol litre-1 in the handled groups; 60, 43 and 48 nmol litre-1 in the rubber ring groups; 77, 50 and 62 nmol litre-1 in the Burdizzo groups; and 106, 63 and 107 nmol litre-1 in the surgical groups. The greatest cortisol response occurred in 42-day-old surgically treated calves and the shortest response after Burdizzo castration. These responses suggest that irrespective of age, all methods of castration studied caused acute pain. Burdizzo castration appeared to produce the least pain, particularly in younger calves.
对6日龄、21日龄和42日龄的犊牛分别进行处理（作为对照），或采用巴迪佐去势法、手术去势法或橡皮圈去势法，并在处理后3小时监测它们的行为和血浆皮质醇水平。与采用巴迪佐去势法和手术去势法处理的犊牛以及对照组相比，橡皮圈去势法导致犊牛在两小时内的活跃行为和异常姿势显著增加，而手术去势法则导致异常站立显著增加，尤其是在最初30分钟内。6日龄犊牛的异常行为和姿势记录较少。在对照组中，6日龄、21日龄和42日龄犊牛的平均皮质醇峰值分别为36、31和23纳摩尔/升；在橡皮圈去势组中分别为60、43和48纳摩尔/升；在巴迪佐去势组中分别为77、50和62纳摩尔/升；在手术去势组中分别为106、63和107纳摩尔/升。皮质醇反应最大的是42日龄接受手术治疗的犊牛，巴迪佐去势后反应最短。这些反应表明，无论年龄大小，所研究的所有去势方法都会引起急性疼痛。巴迪佐去势法似乎产生的疼痛最少，尤其是在较年幼的犊牛中。
