PROBLEM TO BE SOLVED: To provide nerve stimulation electrodes with which stimulation electrodes for applying electrical stimulation to a nerve within a vessel can be positioned in a wider range.SOLUTION: Provided are nerve stimulation electrodes 1 for applying electrical stimulation to a nerve P5, comprising: a fixing part 10 made from a resilient material and biasing a predetermined vessel P1 when resiliently deformed for reduction of the diameter thereof to be indwelt in the vessel stimulation electrodes mounted on the fixing part, namely, a first stimulation anode 26, a first stimulation cathode 27, a second stimulation anode 28, and a second stimulation cathode 29 and a lead part the tip of which is connected to the fixing part. The lead part includes anode wires connected to the first stimulation anode and the second stimulation anode, and cathode wires connected to the first stimulation cathode and the second stimulation cathode. When the electrodes are indwelt in a vessel with the diameter of the fixing part reduced, the distance L2 between the first stimulation anode and the second stimulation cathode is longer than the distance L1 between the first stimulation anode and the first stimulation cathode, and the distance L4 between the second stimulation anode and the first stimulation cathode is longer than the distance L3 between the second stimulation anode and the second stimulation cathode.SELECTED DRAWING: Figure 9COPYRIGHT: (C)2017,JPO&INPIT【課題】脈管内において神経に電気刺激を印加可能となる刺激電極の配置範囲が広い神経刺激電極を提供する。【解決手段】神経P5に電気刺激を行う神経刺激電極1であって、弾性を有する材料で形成され、縮径するように弾性的に変形された状態で所定の脈管P1内に留置されることで脈管を付勢する固定部10と、固定部に設けられた刺激電極である第一刺激陽極26、第一刺激陰極27、第二刺激陽極28及び第二刺激陰極29と、先端部が固定部に接続されたリード部とを備え、リード部は、第一刺激陽極及び第二刺激陽極に接続された陽極配線と、第一刺激陰極及び第二刺激陰極に接続された陰極配線とを有し、脈管内に留置されることで固定部が縮径したときに、第一刺激陽極と第一刺激陰極との距離L1よりも第一刺激陽極と第二刺激陰極との距離L2の方が長く、第二刺激陽極と第二刺激陰極との距離L3よりも第二刺激陽極と第一刺激陰極との距離L4の方が長い。【選択図】図9
