PROBLEM TO BE SOLVED: To provide a surgical instrument which has a shape similar to that of a generally used surgical scalpel, can unfailingly seal a vascular system of a biological tissue when the tissue is incised or separated, causes no or little bleeding, and hardly causes damage of proximal tissues.SOLUTION: The microwave surgical instrument includes: a coaxial microwave transmitting section having a central conductor, an insulator and an external conductor and a blade shaped flat on the front end of thereof. The blade includes a surgical blade having a wide central conductor directly connected to the central conductor, an insulator for covering the surgical blade except for its cutting edge, and an external conductor for covering the insulator. The cutting edge protrudes from the external conductor and the insulator, has a curved edge line, and is positioned on the center of ends of the external conductors on both the sides, and a distance between the edge line and the end of the external conductor is &le2 mm. This surgical instrument is excellent in operability and incision function, and causes no or little bleeding.COPYRIGHT: (C)2012,JPO&INPIT【課題】一般的に使用されている手術用メスに近い形をし、組織を切開又は切離する際に確実に生体組織の血管系もシーリングし、出血しないまたは少量の出血ですみ、近接組織を損傷しにくい手術器を提供する。【解決手段】中心導体、絶縁体、及び外部導体からなる同軸状のマイクロ波伝送部とその先端に平らに成形された刃部を含む医療用手術器であって、その刃部は、該中心導体に直接接続されている幅広の中心導体からなる手術刃、その手術刃を刃先端部を除いて覆う絶縁体、その絶縁体を覆う外部導体を備え、該刃先端部は外部導体および絶縁体から突出し、刃線は曲線でありその両脇の外部導体の端部の中央に位置し、刃線と外部導体端部の距離が2mm以下であるマイクロ波手術器。本発明の手術器は、操作性、切開機能に優れ、出血しない又は殆ど出血しない手術器である。【選択図】図1
