Device for treating a blood circulation canal and process for preparing this device

摘要

This device includes a hollow support delimiting, in the vicinity of a distal end, a transverse retention opening. It further includes an endoprosthesis which can be deployed between a state retracted against the support and an expanded state. The device further includes a filamentary connection forming a clamping ring surrounding the endoprosthesis and forming a loop engaged in the support through the retention opening. A retention rod mounted to be movable in the support, and the retention rod has a hook for retaining the loop. The displacement of the retention rod from a release position to a retention position brings about the tightening of the clamping ring.

主权项

1. A device for treating a blood circulation canal, comprising:
a hollow support having a distal end and a proximal end, and having a transverse distal retention opening at said distal end; an endoprosthesis configured to be deployed in both a retracted state, wherein said endoprosthesis is retracted against a lateral surface of said support, and an expanded state, wherein said endoprosthesis is released from said support; a filamentary connection having:
a clamping ring portion surrounding an entirety of a circumference of an outer surface of said endoprosthesis, said clamping ring portion located outside of said hollow support and having a first end and a second end extending into said hollow support through said retention opening; anda constricting loop portion having a first end and a second end connected to said first end and said second end, respectively, of said clamping ring portion such that said constricting loop portion is located entirely within said hollow support without protruding from said hollow support, said clamping ring portion being interchangeable between a retracted configuration for constricting and maintaining said endoprosthesis in the retracted state, and an expanded configuration for deploying said endoprosthesis; and a retention rod mounted so to be movable within said support between a retain position for retaining and pulling said constricting loop portion and a release position for releasing said constricting loop portion, said retention rod comprising a hook for engaging and retaining said constricting loop portion of said filamentary connection; wherein said endoprosthesis, said filamentary connection, and said retention rod are arranged and interconnected such that movement of said retention rod from the release position to the retain position causes tightening of said clamping ring portion of said filamentary connection by changing a configuration of said clamping ring portion from the expanded configuration for deploying said endoprosthesis to the refracted configuration for constricting and maintaining said endoprosthesis in the retracted state; and wherein said endoprosthesis, said filamentary connection, and said retention rod are arranged and interconnected such that movement of said retention rod from the release position to the retain position causes an increase in size of said constricting loop portion and a corresponding reduction in size of said clamping ring portion.