Van der Saag Dominique, Lomax Sabrina, Windsor Peter Andrew, Hall Evelyn, White Peter John
Sydney School of Veterinary Science, Faculty of Science, The University of Sydney, Sydney, NSW 2006, Australia.
School of Life and Environmental Sciences, Faculty of Science, The University of Sydney, Sydney, NSW 2006, Australia.
Animals (Basel). 2019 Mar 28;9(4):126. doi: 10.3390/ani9040126.
This study assessed the efficacy of pre-operative injected lignocaine and peri-operative topical vapocoolant spray, administered as most practical for incorporation into routine calf castration procedures. Calves were randomly allocated to: (1) sham castration (SHAM); (2) surgical castration (CAST); (3) surgical castration with lignocaine (LIG); and (4) surgical castration with vapocoolant spray (VAPO). Calf behavioural responses were scored at different stages of the sham castration or castration procedure. Maximum ocular temperatures were measured at three time-points relative to restraint and treatment. There were significant effects of treatment ( < 0.001) and stage of procedure ( < 0.001) on calf behavioural response. SHAM calves were more likely to display less severe responses compared to all other calves and LIG calves were more likely to display less severe responses compared to VAPO calves. Calves were more likely to display more severe responses to extrusion of the first spermatic cord compared to all other stages of castration, and to extrusion of the second spermatic cord compared to severing of the second spermatic cord. There was a significant effect of time ( < 0.001) on ocular temperature, with ocular temperature being greater following sham castration or castration. In this study, there was no evidence of pain reduction during castration of calves by either lignocaine or vapocoolant spray.
本研究评估了术前注射利多卡因和围手术期局部应用挥发性冷却剂喷雾的效果，这两种方法在纳入常规犊牛去势手术中最为实用。犊牛被随机分为：(1)假去势组(SHAM)；(2)手术去势组(CAST)；(3)利多卡因手术去势组(LIG)；(4)挥发性冷却剂喷雾手术去势组(VAPO)。在假去势或去势手术的不同阶段对犊牛的行为反应进行评分。在与约束和治疗相关的三个时间点测量最高眼温。治疗(P<0.001)和手术阶段(P<0.001)对犊牛行为反应有显著影响。与所有其他犊牛相比，SHAM组犊牛表现出较轻反应的可能性更大；与VAPO组犊牛相比，LIG组犊牛表现出较轻反应的可能性更大。与去势的所有其他阶段相比，犊牛对第一条精索挤出的反应更强烈；与第二条精索切断相比，对第二条精索挤出的反应更强烈。时间对眼温有显著影响(P<0.001)，假去势或去势后眼温更高。在本研究中，没有证据表明利多卡因或挥发性冷却剂喷雾在犊牛去势过程中能减轻疼痛。
