Hemostasis valve, catheter sheath, and method for sealing interventional instrument

Abstract

A hemostasis valve, a catheter sheath, and a method for sealing an interventional instrument (9), the hemostasis valve comprising a housing (1,100) and a sealing film (2,130) which is installed within the housing (1,100) and which is a tubular structure; an inner cavity (21) of the tubular structure serves as an instrument channel (11,131) and penetrates the housing (1,100); driving chambers (12,150) which are located on the periphery of the sealing film (2,130) and which are used for being filled with a fluid are provided within the housing (1,100); the hemostasis valve further comprises an energy storage mechanism (3) that can link with the fluid; the energy storage mechanism (3) correspondingly stores or releases energy when the state of the sealing film (2,130) changes; and the sealing film (2,130) is driven to seal the instrument channel (11,131) during energy release. By means of the design of the energy storage mechanism (3), deformation energy of the sealing film (2,130) is stored, thereby achieving good compatibility and a good sealing effect when different instruments pass through; in addition, by means of the configuration of parameters of the sealing film (2,130), the configuration of parameters of an energy storage structure, and the cooperation between the two, the advantages of good drawing operation feeling and small operating force changes of an instrument are achieved, and a structural basis is provided for other functions.

Dependencies are inferred from the claim text.