Ford D J, Pither C, Raj P P
Anesth Analg. 1984 Oct;63(10):925-8.
This study was designed to compare the use of insulated and uninsulated needles with a peripheral nerve stimulator for locating a peripheral nerve in an anesthetized cat. The needles were mounted on a one-dimensional manipulator and both the saphenous and sciatic nerves were located. The tip of the insulated needle was consistently placed on the sciatic nerve. The tip of the uninsulated needle was placed 0.1-0.9 cm past the sciatic nerve. Injecting saline to assess the position of the tip of the needle relative to the sciatic nerve did not detect the needle being past the nerve. With the saphenous nerve preparation, both the needle and nerve were visible through the tissue. Using an insulated needle, the minimum current required to stimulate the nerve occurred when the tip of the needle touched the saphenous nerve. Using an uninsulated needle, the minimum current occurred when the tip was 0.1-0.8 cm past the nerve. The conclusion is that insulated needles more precisely locate the peripheral nerve than uninsulated needles.
本研究旨在比较使用绝缘针和非绝缘针与外周神经刺激器在麻醉猫身上定位外周神经的情况。将针安装在一维操纵器上，定位了隐神经和坐骨神经。绝缘针的尖端始终置于坐骨神经上。非绝缘针的尖端置于坐骨神经后方0.1 - 0.9厘米处。通过注射生理盐水来评估针尖端相对于坐骨神经的位置，未检测到针越过神经。在制备隐神经时，针和神经在组织中均可见。使用绝缘针时，当针尖端接触到隐神经时，刺激神经所需的最小电流出现。使用非绝缘针时，当尖端在神经后方0.1 - 0.8厘米时出现最小电流。结论是，与非绝缘针相比，绝缘针能更精确地定位外周神经。
