Portela Diego A, Otero Pablo E, Tarragona Lisa, Briganti Angela, Breghi Gloria, Melanie Pierre
Department of Veterinary Clinics, University of Pisa, San Piero a Grado, Pisa, Italy.
Vet Anaesth Analg. 2010 Nov;37(6):531-41. doi: 10.1111/j.1467-2995.2010.00572.x.
To evaluate the effectiveness of paravertebral lumbar plexus block combined with parasacral sciatic block to anesthetize one hind limb in awake dogs.
Randomized, controlled, blinded experimental study.
Eight healthy mongrel dogs weighing 12.4 ± 4.5 kg and aged 7 ± 2.33 years.
After sedation with medetomidine, dogs received B1: bupivacaine 0.25%, 0.2 mL kg(-1), B2: bupivacaine 0.5%, 0.2 mL kg(-1) , B3: bupivacaine 0.25% 0.4 mL kg(-1), P1: NaCl 0.2 mL kg(-1), P2: NaCl 0.4 mL kg(-1) . The lumbosacral plexus was blocked through a paravertebral block of the fourth, fifth and sixth lumbar nerves combined with a parasacral block. The relevant nerves were located using a nerve stimulator and injections of each treatment were administered. Degree and durations of sensory blockade were determined through the response to a Halsted clamp pressure on the skin innervated by the saphenous/femoral and lateral cutaneous femoral nerves (lumbar dermatomes) and by the peroneal and tibial nerves. The degree and duration of motor blockade was assessed evaluating the ability to walk normally and proprioception.
P1 and P2 treatments did not show any grade of sensory or motor blockade. The B2 treatment produced a higher degree of sensory blockade compared to B1 and B3 for both lumbar and sciatic dermatomes. There was no significant difference in the degree of sensory blockade comparing B1 to B3. The B2 treatment had greater motor blockade compared to B1 and B3. The duration of sensory and motor blockade was longer in B2 compared to B1 and B3.
When the nerve stimulator is used to perform the lumbosacral plexus block, the concentration of the bupivacaine has a more important role than the volume to produce a more solid and longer block.
评估腰旁腰丛阻滞联合骶旁坐骨神经阻滞对清醒犬一侧后肢进行麻醉的效果。
随机、对照、盲法实验研究。
8只健康杂种犬，体重12.4±4.5千克，年龄7±2.33岁。
用美托咪定镇静后，犬接受以下处理：B1：0.25%布比卡因，0.2毫升/千克；B2：0.5%布比卡因，0.2毫升/千克；B3：0.25%布比卡因，0.4毫升/千克；P1：0.9%氯化钠溶液，0.2毫升/千克；P2：0.9%氯化钠溶液，0.4毫升/千克。通过第四、五、六腰神经的腰旁阻滞联合骶旁阻滞对腰骶丛进行阻滞。使用神经刺激器定位相关神经并给予每种处理注射。通过对由隐神经/股神经和股外侧皮神经（腰皮节）以及腓总神经和胫神经支配的皮肤施加哈氏钳压力的反应来确定感觉阻滞的程度和持续时间。通过评估正常行走能力和本体感觉来评估运动阻滞的程度和持续时间。
P1和P2处理未显示任何程度的感觉或运动阻滞。与B1和B3相比，B2处理对腰和坐骨皮节产生的感觉阻滞程度更高。B1与B3相比，感觉阻滞程度无显著差异。与B1和B3相比，B2处理的运动阻滞更大。与B1和B3相比，B2的感觉和运动阻滞持续时间更长。
当使用神经刺激器进行腰骶丛阻滞时，布比卡因的浓度在产生更可靠和更长时间的阻滞方面比容量起更重要的作用。
