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公开(公告)号：US06193715B1
公开(公告)日：2001-02-27
申请号：US09272272
申请日：1999-03-19
IPC分类号： A61B1818
CPC分类号： A61B18/1402 , A61B17/32 , A61B18/148 , A61B18/1482 , A61B18/16 , A61B2017/00296
摘要： An adapter unit for a mechanical tissue cutting implement such as a shaver, morcellator or the like includes a mounting block from which an electrically insulating sheath extends. The sheath fits over the cannula or shaft of the cutting implement, and is secured in alignment and attached so that the cutting tip, for example, the tool and its window in the cannula tip, are exposed through the sheath. A conductor, which may be a conductive layer, extends along the length of the sheath and is exposed to form a distal electrode at the tip in close proximity to the opening, constituting one electrode of a bipolar electrode arrangement at the exposed tool. The other electrode is provided by electrical connection to the implement itself, so that a high current density path is formed through tissue in the cutting region. Preferably both output connections of an electrosurgical generator are coupled through a matching transformer to the mounting block by a plug, socket, cable or fixed cord arrangement, and the mounting block may, for example, be formed of plastic, preferably having an alignment feature such as a notch to fasten to the implement so that the sheath opening aligns with the cutter. Electrical connection to the implement may be effected via a conductive bushing, fastening bolt or the like which contacts one of the supply leads through a wire, spring or other conductive path. The adapter may also provide a sheath opening and distal electrode about a non-apertured region of the cannula, for example on the rear surface of the cannula opposed to the cutting tool aperture, to form a hemostasis element that may be rotated into position to coagulate bleeding. In this case the bipolar electrode geometry may be configured for high energy density delivery that does not vary with tool rotation. The adapter may also convert a monopolar device to bipolar operation, providing a single additional electrode positioned by the sheath at the cutting aperture.
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公开(公告)号：US06174309B1
公开(公告)日：2001-01-16
申请号：US09248484
申请日：1999-02-11
IPC分类号： A61B1818
CPC分类号： A61B18/1445 , A61B17/32 , A61B18/1442 , A61B2017/2945 , A61B2018/00601 , A61B2018/0063 , A61B2018/00809 , A61B2018/1286 , A61B2018/1412 , A61B2018/1432
摘要： An electrosurgical instrument has a handle and a body which position and close a jaw about a tissue site for simultaneously cutting and sealing relatively large tissue structures. The jaw includes an electrosurgical cutting member, which may be a blade or wire, against which tissue is biased along a cut line, and a clamping assembly that clamps a region adjacent to or surrounding the cut line. The clamping assembly includes sealing electrodes for heating the region and welding tissue along the side of the cut as the cutter parts the tissue. The clamping assembly preferably has first and second clamping jaws extending in parallel to grip the tissue as tension is released by the cut, allowing dependable and complete sealing of the cut ends over an extended time while the tissue is immobilized. Sealing electrodes formed of thermally conductive material may be covered by a thinner coating or thermally non-impeding or heat transfer cover, which preferably includes a material to assure biocompatibility and prevent sticking. The handle, body and jaw may be configured in the shape of a hemostat to allow simple positioning, or may be configured with an elongated body and a mechanism that operates the jaw through a stationary or telescoping handle for endosurgical use through a small incision. The blade may extend entirely to the tip, or the clamp assembly may extend forward of the blade. An energy ratio input element may attach to an energy source to apportion electrosurgical energy between the cutting member and the sealing electrodes. The element may include a pair of transformers, or a transformer with a split secondary or a tapped secondary winding, with the primary configured for connection to the output of an RF scalpel drive console. The windings of the transformer match impedances and power requirements of the different cutting and sealing electrodes to coordinate effective tissue sealing and welding with the cutting operation.
摘要翻译： 电外科器具具有手柄和身体，该手柄和身体围绕组织部位定位和闭合钳口，用于同时切割和密封相对较大的组织结构。 钳口包括电外科切割构件，其可以是沿着切割线偏压组织的刀片或线，以及夹紧与切割线相邻或围绕切割线的区域的夹紧组件。 夹紧组件包括密封电极，用于当切割器对组织进行分配时，沿切割侧面加热区域和焊接组织。 夹紧组件优选地具有平行延伸的第一和第二夹爪，以便当切割释放张力时夹持组织，从而允许在组织被固定时在延长的时间内可靠和完全地密封切割端。 由导热材料形成的密封电极可以被较薄的涂层或热不阻碍或传热盖覆盖，其优选地包括确保生物相容性并防止粘附的材料。 手柄，身体和颚部可以被配置为止血器的形状，以允许简单的定位，或者可以配置有细长的主体和机构，其通过固定或伸缩手柄操作钳口，以通过小切口进行外科手术。 叶片可以完全延伸到尖端，或者夹具组件可以延伸到叶片的前方。 能量比输入元件可以附接到能量源以分配切割构件和密封电极之间的电外科能量。 该元件可以包括一对变压器，或者具有分离辅助绕组或抽头次级绕组的变压器，主变压器被配置为连接到RF手术刀驱动器控制台的输出端。 变压器的绕组匹配不同切割和密封电极的阻抗和功率要求，以协调切割操作的有效组织密封和焊接。
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公开(公告)号：US5925040A
公开(公告)日：1999-07-20
申请号：US878389
申请日：1997-06-18
CPC分类号： A61B18/1485 , A61B2018/00517 , A61B2018/1253 , A61B2018/1472 , A61B2018/1497 , A61B2018/1861
摘要： An electrosurgical instrument includes a roller electrode segmented into conductive and non-conductive portions. When the electrode is rolled over a treatment site, the region of the electrode that contacts the site receives current from an energy source and the non-contacting region of the electrode is isolated from the energy source. The electrode is well suited for use in an isotonic fluid environment, without resulting in significant current dissipation since the non-contacting portion is isolated from the energy source. The roller electrode has a substantially cylindrical shape and is rotatable about a longitudinal axis along which a bore extends. A conductor carrying current from the energy source is disposed through the bore such that, when the electrode is urged against a treatment site, the conductor delivers current to the contacting region of the roller electrode and is isolated from the non-contacting region. Various designs of the segmented roller electrode, as well as both monopolar and bipolar embodiments, are described.
摘要翻译： 电外科器械包括分为导电部分和非导电部分的辊电极。 当电极在处理部位上滚动时，接触该部位的电极的区域接收来自能量源的电流，并且电极的非接触区域与能量源隔离。 该电极非常适用于等渗流体环境，而不会导致显着的电流耗散，因为非接触部分与能量源隔离。 辊电极具有基本上圆柱形的形状，并且可围绕孔延伸的纵向轴线旋转。 承载来自能量源的电流的导体通过孔布置，使得当电极被推向处理部位时，导体将电流传递到辊电极的接触区域并与非接触区域隔离。 描述了分段辊电极的各种设计，以及单极和双极实施例。
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