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    • 94. 发明申请
    • SURGICAL SUTURE MATERIALS WITH POROUS SHEATHS FOR DRUG DELIVERY
    • 用于药物递送的多孔手术用外科缝合材料
    • WO2017147431A1
    • 2017-08-31
    • PCT/US2017/019365
    • 2017-02-24
    • GEORGIA TECH RESEARCH CORPORATIONWASHINGTON UNIVERSITY
    • XIA, YounanLI, JianhuaTHOMOPOULOS, StavrosLINDERMAN, StephenZHU, Chunlei
    • A61L17/00A61L17/04A61L17/10A61L17/14
    • A61L17/14A61L17/005A61L17/04A61L17/10
    • Disclosed herein are surgical suture materials that facilitate the sustained delivery of releasable components. The suture materials are processed by the disclosed methods to create a layer of pores extending inward from the outer surface of the suture. Particularly, the surgical suture materials are swollen in a calcium-ion containing solution, then freeze-dried to create pores which can be filled with a releasable component for ultimate delivery to the tissue. In one particular embodiment, the suture has an outer sheath that defines a lumen. Elongated filaments extend through the lumen. This suture embodiment is processed by the disclosed methods to yield a surgical suture material with a porous outer sheath. The pores enable efficient loading of a releasable component into the lumen, facilitating sustained delivery of the releasable component from the suture. The suture maintains its mechanical integrity despite the introduction of pores due to coordination bonds formed between the calcium ions of the swelling solution and carbonyl oxygen atoms of the polymer chains of the surgical suture material.
    • 本文公开了促进可释放组分的持续递送的外科缝合材料。 通过所公开的方法处理缝合材料以产生从缝合线的外表面向内延伸的孔隙层。 特别地,外科缝合材料在含有钙离子的溶液中溶胀,然后冷冻干燥以产生可用可释放组分填充以最终递送至组织的孔隙。 在一个特定实施例中,缝线具有限定内腔的外部护套。 细长的细丝通过内腔延伸。 通过所公开的方法处理该缝合线实施例以产生具有多孔外护套的手术缝合线材料。 孔使得能够将可释放组分有效地装载到内腔中,有利于可释放组分从缝合线的持续递送。 尽管由于在溶胀溶液的钙离子与手术缝合材料的聚合物链的羰基氧原子之间形成的配位键而引入孔,缝合线仍保持其机械完整性。