Trocar with improved universal seal
    1.
    发明授权
    Trocar with improved universal seal 失效
    套管针改良通用密封

    公开(公告)号:US5628732A

    公开(公告)日:1997-05-13

    申请号:US588850

    申请日:1996-01-19

    IPC分类号: A61B17/34 A61M25/00 A61M5/178

    CPC分类号: A61B17/3462 A61B2017/3464

    摘要: A trocar containing a universal seal for sealing against surgical instruments of varying diameter to maintain insufflation in the body cavity is disclosed. The universal seal has an elastomeric sealing component with a centrally located interior region containing an aperture, and a concentrically located sealing region. The sealing region is composed of an integral laminate having an overlaying layer co-molded with an underlying layer. The overlaying layer has a hardness between about 40 Shore A Durometer Scale and about 80 Shore D Durometer Scale. The underlying layer has a hardness between about 5 Shore A Durometer Scale and about 40 Shore A Durometer Scale. The co-molded laminate balances the properties of tear resistance and elasticity which are necessary for a working universal seal, and does so without the need for resilient legs or protectors to facilitate the opening of the aperture of the seal or to prevent tearing when instruments are inserted.

    摘要翻译: 公开了一种套管针,其包含用于密封不同直径的外科器械的通用密封件,以维持体腔内的吹气。 通用密封件具有弹性体密封部件,其具有位于中心的内部区域,该内部区域包含孔和同心位置的密封区域。 密封区域由具有与下层共同模制的覆盖层的整体层压体组成。 覆盖层具有在约40肖氏硬度计量度和约80肖氏硬度计量度之间的硬度。 下层具有在约5肖氏硬度计量度和约40肖氏硬度计量度之间的硬度。 共同成型的层压板平衡了工作通用密封件所必需的抗撕裂性和弹性的性质,并且不需要弹性腿或保护件来促进密封件的孔的打开,或者当仪器是 插入。