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    • 74. 发明公开
    • CHITOSAN AND POLYETHYLENE GLYCOL COPOLYMERS AND METHODS AND DEVICES FOR USING SAME FOR SEALING A VASCULAR PUNCTURE
    • 壳聚糖和POLYETHYLENGLYKOLCOPOLYMERE以及其用于密封血管穿刺方法和装置
    • EP3148602A1
    • 2017-04-05
    • EP15728994.3
    • 2015-05-28
    • Access Closure, Inc.
    • MYLONAKIS, AndreasLIM, Florencia
    • A61L31/04A61L31/06A61L31/14
    • A61B17/0057A61B2017/00623A61B2017/0065A61L24/0031A61L24/08A61L31/042A61L31/06A61L31/145A61L31/148A61L2400/04C08L5/08C08L71/02
    • A sealant is provided for sealing a puncture through tissue that comprises an elongate first section including a proximal end, a distal end, and a cross-section sized for delivery into a puncture through tissue, and a second section extending from the distal end of the first section. The first section may be formed from a freeze-dried hydrogel that expands when exposed to physiological fluid within a puncture. The first section comprises chitosan and at least one additional polymer. The second section may be formed from a solid mass of non-freeze-dried, non-cross-linked hydrogel precursors. The precursors are in an unreactive state until exposed to an aqueous physiological environment, whereupon the precursors undergo in-situ crosslinking with one another to provide an adhesive layer bonded to the first section. The second section may further comprise chitosan. Apparatus and methods for delivering the sealant into a puncture through tissue are also provided.
    • 密封剂提供了一种用于通过组织密封的穿刺做细长的第一部分,其包括近端,远端,和一个横截面尺寸适于递送到穿过组织的穿刺,和第二部分从所述远端延伸的包括 首节。 所述第一部分可以由冷冻干燥的水凝胶可以形成没有展开时的穿刺内暴露于生理流体。 所述第一区段包括脱乙酰壳多糖和至少一种另外的聚合物。 第二部分可以由非冷冻干燥的,非交联的水凝胶前体的固体物质而形成。 该前体是在非反应性状态,直到在wässrige生理环境,其中在所述前体中原位经历与彼此交联,以提供与粘合剂结合到所述第一部分层暴露于。 所述第二部分可以包含另外的脱乙酰壳多糖。 因此,提供装置和用于通过组织递送密封剂到穿刺方法。