ELECTROSURGICAL SEALER AND DIVIDER

To provide an electrosurgical instrument that reliably cuts and seals tissue.SOLUTION: The electrosurgical instrument includes: a movable tissue cutting mechanism; and a pair of opposing jaws that are shaped and configured to move between a closed position for clamping and sealing tissue held therebetween and an open position. The first jaw comprises an exposed tissue sealing surface which has a primary sealing surface and at least one protrusion extending from the primary sealing surface for concentrating a sealing current through the at least one protrusion. The second jaw comprises an exposed tissue sealing surface which has a primary sealing surface and at least one recess in the primary sealing surface for concentrating a sealing current through the at least one recess. The protrusion and the recess oppose each other when the pair of opposing jaws are in the closed position. Each one of the pair of opposing jaws comprises an elongated slot for receiving a portion of the cutting mechanism. A related method is also disclosed.SELECTED DRAWING: Figure 6 【課題】組織を確実に切断して封止する電気外科手術用器具の提供。【解決手段】電気外科手術用器具が可動組織切断機構と、一対の対向する顎部であって、その間に挟持された組織を締め付けて封止する閉位置と開位置との間を移動するように成形され構成される顎部とを備える。第１の顎部が、主封止面と、少なくとも１つの突起であって、少なくとも１つの突起を通して封止電流を集中させるために主封止面から延びる突起とを有する露出組織封止面を備える。第２の顎部が、主封止面と、少なくとも１つの凹部であって、少なくとも１つの凹部を通して封止電流を集中させるために主封止面に設けられる凹部とを有する露出組織封止面を備える。突起と凹部とは、顎部が閉位置にあるときに、互いに対向する。顎部のそれぞれは、切断機構の一部を受容する細長いスロットを有する。このほか、関連する方法が開示される。【選択図】図６