Tuyển tập các báo cáo nghiên cứu về bệnh học thý y được đăng trên tạp chí Acta Veterinaria Scandinavica cung cấp cho các bạn kiến thức về bệnh thú yđề tài: Effect of local anaesthesia and/or analgesia on pain responses induced by piglet castration. | Hansson et al. Acta Veterinaria Scandinavica 2011 53 34 http content 53 1 34 AVS ACTAVETERINARIA SCANDINAVICA RESEARCH Open Access Effect of local anaesthesia and or analgesia on pain responses induced by piglet castration Monica Hansson1 Nils Lundeheim1 Gorel Nyman2 and Gunnar Johansson3 Abstract Background Surgical castration in male piglets is painful and methods that reduce this pain are requested. This study evaluated the effect of local anaesthesia and analgesia on vocal physiological and behavioural responses during and after castration. A second purpose was to evaluate if herdsmen can effectively administer anaesthesia. Methods Four male piglets in each of 141 litters in five herds were randomly assigned to one of four treatments castration without local anaesthesia or analgesia C controls analgesia M meloxicam local anaesthesia L lidocaine or both local anaesthesia and analgesia LM . Lidocaine L LM was injected at least three minutes before castration and meloxicam M LM was injected after castration. During castration vocalisation was measured and resistance movements judged. Behaviour observations were carried out on the castration day and the following day. The day after castration castration wounds were ranked ear and skin temperature was measured and blood samples were collected for analysis of acute phase protein Serum Amyloid A concentration SAA . Piglets were weighed on the castration day and at three weeks of age. Sickness treatments and mortality were recorded until three weeks of age. Results Piglets castrated with lidocaine produced calls with lower intensity p and less resistance movements p during castration. Piglets that were given meloxicam displayed less pain-related behaviour huddled up spasms rump-scratching stiffness and prostrated on both the castration day p . and the following day p . Controls had less swollen wounds compared to piglets assigned to treatments M L and LM p . The .
