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Abstract：
This study aimed to describe the prominent landmarks for an in-plane ultrasound-guided lateral approach to an axillary RUMM block in cats and document the anatomical distribution of injected solution in cadavers.
Eleven mixed breed, frozen-thawed cat cadavers were used. The ultrasound probe was placed on the lateral aspect of the forelimb. A spinal needle was used to inject either methylene blue 5 mg/ml or permanent tissue dye 1:10 within the focal clustering point of the radial (R), ulna (U), median (M) and musculocutaneous (Mc) nerves. The block was approached from either a cranial or caudal direction. Specimens were immediately dissected. A successful block was defined as ⩾20 mm of continuous stain on all nerves (R, U, M and Mc), a partial block as one or more nerves stained ⩾20 mm continuously and a negative block failed to stain any nerve ⩾20 mm.
The cranial approach stained the R 8/9, U 6/9, M 6/9 and Mc 8/9 nerves successfully, while the caudal approach stained the R 7/9, U 8/9, M 7/9 and Mc 5/9 nerves successfully. There were no statistical differences on staining rates between approaches or limbs used.
The lateral approach to an axillary RUMM block is feasible in cats and may be a useful alternative to current approaches used for brachial and antebrachial desensitisation. Both cranial and caudal approaches produced similar results; however, further research in live animals will determine the clinical applicability.
Eleven mixed breed, frozen-thawed cat cadavers were used. The ultrasound probe was placed on the lateral aspect of the forelimb. A spinal needle was used to inject either methylene blue 5 mg/ml or permanent tissue dye 1:10 within the focal clustering point of the radial (R), ulna (U), median (M) and musculocutaneous (Mc) nerves. The block was approached from either a cranial or caudal direction. Specimens were immediately dissected. A successful block was defined as ⩾20 mm of continuous stain on all nerves (R, U, M and Mc), a partial block as one or more nerves stained ⩾20 mm continuously and a negative block failed to stain any nerve ⩾20 mm.
The cranial approach stained the R 8/9, U 6/9, M 6/9 and Mc 8/9 nerves successfully, while the caudal approach stained the R 7/9, U 8/9, M 7/9 and Mc 5/9 nerves successfully. There were no statistical differences on staining rates between approaches or limbs used.
The lateral approach to an axillary RUMM block is feasible in cats and may be a useful alternative to current approaches used for brachial and antebrachial desensitisation. Both cranial and caudal approaches produced similar results; however, further research in live animals will determine the clinical applicability.
摘要：
这项研究旨在描述平面内超声引导的侧向方法对猫的腋窝RUMM阻滞的突出标志，并记录尸体中注入溶液的解剖分布。
11个混合品种，使用冻融的猫尸体。超声探头放置在前肢的外侧。使用脊柱针在radial（R）的焦点聚集点内注射5mg/ml的亚甲蓝或1：10的永久性组织染料，尺骨(U),正中（M）和肌皮（Mc）神经。从头颅或尾方向接近该块。立即解剖标本。一个成功的块被定义为所有神经上的20毫米连续染色(R，U,M和Mc)，一个或多个神经连续染色20毫米的部分块和一个阴性块未能染色任何神经20毫米。
头颅入路成功染色了R8/9、U6/9、M6/9和Mc8/9神经，尾入路成功染色了R7/9、U8/9、M7/9和Mc5/9神经。使用的方法或肢体之间的染色率没有统计学差异。
腋窝RUMM阻滞的外侧方法在猫中是可行的，并且可能是当前用于肱和前臂脱敏的方法的有用替代方法。头颅和尾入路都产生了相似的结果；然而，活体动物的进一步研究将确定临床适用性。
11个混合品种，使用冻融的猫尸体。超声探头放置在前肢的外侧。使用脊柱针在radial（R）的焦点聚集点内注射5mg/ml的亚甲蓝或1：10的永久性组织染料，尺骨(U),正中（M）和肌皮（Mc）神经。从头颅或尾方向接近该块。立即解剖标本。一个成功的块被定义为所有神经上的20毫米连续染色(R，U,M和Mc)，一个或多个神经连续染色20毫米的部分块和一个阴性块未能染色任何神经20毫米。
头颅入路成功染色了R8/9、U6/9、M6/9和Mc8/9神经，尾入路成功染色了R7/9、U8/9、M7/9和Mc5/9神经。使用的方法或肢体之间的染色率没有统计学差异。
腋窝RUMM阻滞的外侧方法在猫中是可行的，并且可能是当前用于肱和前臂脱敏的方法的有用替代方法。头颅和尾入路都产生了相似的结果；然而，活体动物的进一步研究将确定临床适用性。
