PROBLEM TO BE SOLVED: To solve a problem in an actual clinical surgery that it is difficult to coagulate living tissue by microwave without giving an excessive damage to the living tissue and to certainly cut the living tissue.SOLUTION: A medical treatment instrument coagulates the living tissue by the microwave without giving the excessive damage to the living tissue and seals a vascular structure, so that the living tissue can be cut certainly. On a cutting blade part of the medical treatment instrument, the medical treatment instrument has a movable first electrode 1 connected to an outer conductor, a fixed second electrode 2 connected to a center electrode, and an blade 17 composed of an insulator. The medical treatment instrument operates such that the living tissue is held between the movable first electrode and the blade composed of the insulator, the living body is coagulated by supplying the microwave to the fixed second electrode, and the living body is cut by turning the movable first electrode. In this case, the blade composed of the insulator is fixed to the fixed second electrode and positioned between the movable first electrode and the fixed second electrode.COPYRIGHT: (C)2011,JPO&INPIT【課題】実際の臨床における手術において、生体組織に過剰な損傷を与えることなくマイクロ波により生体組織を凝固させ、確実に生体組織を切断することは困難であった。【解決手段】生体組織に過剰な損傷を与えることなくマイクロ波により生体組織を凝固させ、脈管構造をシーリングし確実に切断可能とする医療用処置具に関する。本発明は以下からなる;医療用処置具の切断用刃の部分に、外部導体と結合された可動第1電極、中心電極と結合された固定第2電極、および、絶縁体からなる刃を有し、可動第1電極と絶縁体からなる刃との間で生体組織を把持し、固定第2電極にマイクロ波を供給して生体組織を凝固させ、可動第1電極の回動により生体組織を切断する作用を持つ医療用処置具であって、絶縁体からなる刃が固定第2電極に固定され、可動第1電極と固定第2電極の間に位置する医療用処置具。【選択図】図2
