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    • 22. 发明授权
    • Expandable shielded vessel support
    • 可扩展屏蔽容器支架
    • US6010529A
    • 2000-01-04
    • US759877
    • 1996-12-03
    • Steve A. HerweckPeter GingrasPaul MartakosTheodore Karwoski
    • Steve A. HerweckPeter GingrasPaul MartakosTheodore Karwoski
    • A61F2/00A61F2/06A61F2/10A61F2/24A61F2/88A61L31/04A61L31/10A61F2/04
    • A61F2/07A61F2/06A61F2/88A61L31/04A61L31/10A61F2/105A61F2002/072A61F2240/001Y10S623/901
    • A radially expandable support body is enveloped within a cocoon. In a preferred construction, the support is a stent, and a tube of polymeric material, e.g. polytetrafluoroethylene (PTFE), passes through the interior of the stent body and is turned back upon itself over the stent to form a cuff. The assembly is then heated and the outer layer contacts and coalesces with the inner layer, closely surrounding the stent body within a folded envelope having a continuous and seamless end. In one embodiment, an end portion of the tube is expanded before folding back over the stent. The end portion, which becomes an exterior surface of the finished product, thus acquires a greater degree of porosity. Each end of the central tube may be so expanded, and folded back to seal all surfaces and both ends. The stent body itself may be a ring, or a short series of spaced-apart rings, or a wire or web, or a sheet possessing a number of apertures extending entirely through the sheet. The spaces or apertures are covered over or bridged by both the inner and outer polymer layers. The apertures, which may comprise under five to over eighty percent of the surface area of the stent, constitute regions or a grid of points through which the material is coalesced and continuously bonded, and around which strain is distributed by the support. These points or regions remain tacked together so expansion of the assembly does not delaminate the polymer or create flaps and pockets. In another embodiment, a two tube construction is cuffed and assembled into a similarly unitized and seamless stent. One tube is cuffed back, and the other tube covers the cuffed stent. In this embodiment both the tube thicknesses and porosities may differ substantially. For example the inner porosity may be selected to enhance blood flow or intimal regeneration, and the outer surface may have a porosity to encourage anchoring to external muscle tissue.
    • 径向可扩展的支撑体被包围在茧内。 在优选的结构中,支撑件是支架,以及聚合物材料管,例如。 聚四氟乙烯(PTFE)穿过支架主体的内部并在支架上自身转回以形成袖带。 然后将组件加热并且外层与内层接触并聚结,在具有连续和无缝端部的折叠外壳内紧密地围绕支架主体。 在一个实施例中,管的端部在折回到支架之前膨胀。 成为成品的外表面的端部因此获得更大程度的孔隙率。 中心管的每个端部可以如此膨胀,并且被折回以密封所有表面和两端。 支架主体本身可以是一个环,或一系列间隔开的环,或者线或腹板,或者具有完全贯穿片材的多个孔的片。 空间或孔被内聚合物层和外聚合物层覆盖或桥接。 可以包括支架表面积的五到八十成以上的孔构成区域或网格,通过该点或网格将材料聚结并连续地结合,并且通过支撑分布在哪个应变附近。 这些点或区域保持粘合在一起,因此组件的膨胀不会分解聚合物或产生襟翼和口袋。 在另一个实施例中,将双管结构压合并组装成相似的单元化且无缝的支架。 一根管子被套在后面,另一根管子覆盖着袖口支架。 在该实施例中,管的厚度和孔隙度可能基本上不同。 例如,可以选择内部孔隙率以增强血流或内膜再生,并且外表面可以具有孔隙度以促进锚定到外部肌肉组织。
    • 24. 发明授权
    • In-line fluid recovery system
    • 在线流体回收系统
    • US5380314A
    • 1995-01-10
    • US755032
    • 1991-09-04
    • Steve A. HerweckTheodore Karwoski
    • Steve A. HerweckTheodore Karwoski
    • A61M1/00
    • A61M1/0001A61M1/0015A61M1/0056
    • Apparatus for blood collection includes a collection bag with a suction inlet, a fluid inlet, and an outlet, and an internal stent that resiliently biases the bag into a fixed shape while moving to modulate abrupt variations in suction level. A gross filter about the outlet is located out of the suction path, eliminating blood damage from drying or cell trauma. Different graduation scales show the true volume of collected fluid under suction conditions during collection and with no suction during reinfusion. Two quick-connects allow in-line connection with a chest drain to provide suction, and mate with each other to close the inlets when the filtered bag is removed for gravity reinfusion. When multiple units are piggy-backed, they fill sequentially and may be removed for reinfusion quickly, with only a single tube reconnection required during surgery.
    • 用于采集血液的装置包括具有抽吸入口,流体入口和出口的收集袋,以及内部支架,其在移动时弹性地将袋偏压以调节吸入水平的突然变化。 关于出口的总过滤器位于吸入路径之外,消除了由于干燥或细胞损伤引起的血液损伤。 不同的刻度表示收集过程中抽吸条件下收集的液体的真实体积,并且在再灌注期间没有吸力。 两个快速连接允许与胸部排水管线连接以提供抽吸,并且当过滤的袋子被移除以重力输入时,彼此配合以关闭入口。 当多个单位捎带时,它们依次填充,并且可以快速地移除以进行再灌注,在手术期间仅需要单个管重新连接。
    • 25. 发明授权
    • Improved fluid recovery system
    • 改进流体回收系统
    • US4988342A
    • 1991-01-29
    • US255764
    • 1988-10-11
    • Steve A. HerweckTheodore Karwoski
    • Steve A. HerweckTheodore Karwoski
    • A61M1/00
    • A61M1/0013A61M1/0031A61M1/0056A61M2205/3348A61M2205/59
    • A thoracic cavity drainage device includes a first vessel having a plurality of chambers one of which is a regulated drainage chamber, and a separate transfer vessel which receives fluid collected in the drainage chamber of the first vessel. The chambers of both vessels are interconnected in a series by fluid passageways which cooperate to maintain a uniform range of suction in the drainage chamber while preventing passage of water into the drainage chamber and permitting a different level of suction in the transfer vessel. This operation is effective despite relatively large pressure and vacuum impulses caused by stripping of drainage lines, patient coughing, and the like, and despite discrete changes in the physical configuration of the system caused by disconnection of the transfer vessel, connection of the transfer vessel to an infusion line or the opening or closing of fluid lines and ports. A novel transfer vessel empties the drainage device and provides gravity reinfusion of the collected fluids. A mechanism within the transfer vessel provides an effective suction without vacuum connections or pressure regulating adjustments.
    • 胸腔引流装置包括具有多个腔室的第一容器,其中一个腔室是受调节的排液室,以及接收收集在第一容器的排液室中的流体的单独转运容器。 两个容器的腔室通过流体通道串联连接,这些通道协作以在排水室中保持均匀的吸力范围,同时防止水进入排水室并允许转移容器中的不同吸力水平。 尽管相当大的压力和排水管线的排出引起的真空冲击,患者咳嗽等,尽管由转移容器的断开引起的系统的物理结构发生离散的变化,但是转移容器连接到 输液管线或流体管线和端口的打开或关闭。 一个新的转移容器排空排水装置,并提供收集的流体的重力回输。 转移容器内的机构提供无需真空连接或压力调节调节的有效吸力。
    • 26. 发明授权
    • Elasticization of microporous woven tubes
    • 微孔编织管的弹性
    • US4652263A
    • 1987-03-24
    • US747035
    • 1985-06-20
    • Steve A. HerweckTheodore Karwoski
    • Steve A. HerweckTheodore Karwoski
    • A61F2/06
    • A61F2/06A61F2002/065
    • Disclosed are the product and method for making a macroscopically smooth, microporous, flexible, elastic tubular prosthetic device from a substantially non-elastic woven fabric tube. The method involves axially compressing the substantially non-elastic tube on a tight fitting cylindrical mandrel so that the individual axially oriented threads of the fabric form loops projecting radially outwardly between circumferential threads. The threads are set to return to this loop configuration upon release of tension applied axially to the tube. The exterior of the tube presents an easily deformed, macroscopically smooth surface having a multiplicity of interstices among the threads and among the fibers of the threads into which cells can grow after implantation.
    • 公开了用于从基本上非弹性的机织织物管制造宏观平滑,微孔,柔性,弹性的管状假体装置的产品和方法。 该方法包括在紧密配合的圆柱形心轴上轴向压缩基本上非弹性的管,使得织物的各个轴向定向的线形成在圆周螺纹之间径向向外突出的环。 当释放沿轴向施加到管上的张力时,螺纹被设置为返回到该回路结构。 管的外部呈现容易变形的宏观光滑表面,其在螺纹之间以及在植入后细胞能够生长的螺纹的纤维之间具有多个间隙。