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    • 61. 发明授权
    • Systems and methods of promoting endothelialization of a hybrid hemodialysis access graft or a hybrid femoral artery bypass graft in a mammal
    • 在哺乳动物中促进混合血液透析进入移植物或混合股动脉旁路移植物的内皮化的系统和方法
    • US08039246B2
    • 2011-10-18
    • US12019533
    • 2008-01-24
    • Michael Dancu
    • Michael Dancu
    • A01N1/00A01N1/02C12M1/00C12M3/00
    • G09B23/28G09B23/30Y10S623/915Y10S623/916Y10S623/921
    • Hybrid synthetic grafts and embodiments of systems and methods for producing hybrid vascular grafts that can yield implantable grafts that combine synthetic grafts with living cells. Embodiments of systems can include a pressure/flow loop subsystem having an external flow loop system coupled to a specimen holder, where the pressure/flow loop subsystem is capable of adjusting at least two dynamic conditions in the specimen holder or a diameter of a specimen in the specimen holder. Embodiments of methods can promote endothelialization of a hybrid hemodialysis access graft or a hybrid femoral artery bypass graft by placing the hybrid hemodialysis access graft or the hybrid femoral artery bypass graft in a system embodiment according to the invention under conditions effective to promote endothelial cells to form a confluent monolayer on the surface of the hybrid graft.
    • 混合合成移植物和用于产生混合血管移植物的系统和方法的实施方案,其可产生将合成移植物与活细胞组合的可植入移植物。 系统的实施例可以包括压力/流动回路子系统,其具有耦合到样本保持器的外部流动回路系统,其中压力/流动回路子系统能够调节样本保持器中的至少两个动态条件或样本的直径 样品架。 方法的实施方案可以通过在有效促进内皮细胞形成的条件下将根据本发明的系统实施方案中放置混合血液透析入口移植物或混合股动脉旁路移植物来促进混合血液透析进入移植物或混合股动脉旁路移植物的内皮化 在混合移植物的表面上的汇合单层。
    • 62. 发明授权
    • Seeding implantable medical devices with cells
    • 种植植入式医疗器械与细胞
    • US07759120B2
    • 2010-07-20
    • US11515344
    • 2006-09-01
    • Michael F. WolfLaurie A. YunkerPaul V. Trescony
    • Michael F. WolfLaurie A. YunkerPaul V. Trescony
    • C12N11/08
    • A61F2/062A61L27/16A61L27/3616A61L27/38A61L27/3808A61L27/507Y10S623/915Y10S623/916C08L27/18
    • Apparatus and methods for seeding an implantable medical device, such as a vascular prosthesis, with cells, such as endothelial cells, are described. The invention supports techniques for seeding a luminal surface of the device with axial centrifugation. Cells are introduced in suspension into the lumen of the device. The introduction of the cells may occur after a blood centrifugation product, such as platelet-poor plasma, is applied to the luminal surface. After the cells are introduced, the device is then subjected to centrifugation around a longitudinal axis defined by the lumen. Axial centrifugation causes the cells to concentrate toward and adhere to the luminal surface. Shortly after axial centrifugation, the seeded device can be presented for implantation in a patient. The implantable medical device may be inserted into a protective sleeve prior to seeding the device with cells, and the sleeve may or may not be removed prior to implantation.
    • 描述了可植入医疗装置(例如血管假体)与细胞例如内皮细胞接种的装置和方法。 本发明支持用轴向离心法将装置的腔表面接种的技术。 将细胞悬浮液引入装置的内腔。 在血液离心产物(如贫血小板血浆)应用于管腔表面后,细胞的引入可能发生。 导入细胞后,将该装置围绕由内腔限定的纵向轴进行离心。 轴向离心导致细胞浓缩并附着在管腔表面。 在轴向离心后不久,可以将接种的装置用于植入患者体内。 可植入的医疗装置可以在将装置与细胞接种之前插入保护套管中,并且在植入之前套筒可以被移除也可以不被移除。
    • 69. 发明授权
    • Blood contact surfaces using extracellular matrix synthesized in vitro
    • 血液接触面使用​​体外合成的细胞外基质
    • US5908449A
    • 1999-06-01
    • US627640
    • 1996-04-04
    • William Carl BruchmanPaul Christopher Begovac
    • William Carl BruchmanPaul Christopher Begovac
    • A61L27/00A61F2/06A61L27/50A61L33/00
    • A61L27/507Y10S623/916
    • This invention is directed to improved blood contact devices such as vascular prostheses rendered substantially nonthrombogenic through addition of a preserved layer of extracellular subendothelial matrix. The preserved subendothelial matrix layer, which serves as the blood interface of the device, is analogous to the subendothelial matrix layer beneath the endothelium of native vascular surfaces. The device consists of a permanent synthetic base material, preferably porous expanded polytetrafluoroethylene, on which this biologic layer of subendothelial matrix is grown in situ. The biologic layer is produced using in vitro tissue culture methods whereby living cells synthesize and deposit extracellular matrix components, after which the cells are killed and/or removed and the subendothelial matrix layer preserved before implantation. A key aspect of this invention is that no living cells are present in the final configuration, so that the likelihood of recipient immunological response is minimized. This invention results in vascular prostheses that are particularly useful for arterial bypass requiring a diameter of 6 mm or less.
    • 本发明涉及通过添加细胞外内皮下基质的保留层而改进的血液接触装置,例如基本上不引起血管假体的血液假体。 用作装置血液界面的保留的内皮下基质层类似于天然血管表面内皮下面的内皮下基质层。 该装置由永久性合成基础材料,优选多孔膨胀聚四氟乙烯组成,该生物层内皮下基质在其上原位生长。 使用体外组织培养方法产生生物层,其中活细胞合成并沉积细胞外基质组分,之后细胞被杀死和/或去除,并且内皮下基质层在植入前保留。 本发明的关键方面是在最终配置中不存在活细胞,使得受体免疫应答的可能性最小化。 本发明导致对于需要直径为6mm或更小的动脉旁路特别有用的血管假体。