System for deploying a device to a distal location across a diseased vessel

摘要

Configurations are described for assisting execution of a percutaneous procedure while protecting the vascular pathway to the operational theater. One embodiment is directed to a system for deploying a device to a distal location across a diseased vessel, comprising a sheath comprising an expandable distal portion comprising a porous wall defining a lumen therethrough, the distal portion having a collapsed configuration, wherein the sheath has a first cross sectional outer diameter and a first lumen inner diameter, and an expanded configuration, wherein the sheath has a second cross sectional outer diameter and a second lumen inner diameter; wherein in the collapsed configuration, the sheath is configured to be advanced across at least a portion of the diseased vessel to a position adjacent the distal location without substantial size interference between the first cross sectional outer diameter of the sheath and an inner diameter profile of a lumen of the vessel.

主权项

1. A system for deploying a device to a distal location across a diseased vessel comprising:
a sheath comprising an expandable distal portion comprising a porous wall defining a lumen therethrough, the distal portion having a collapsed configuration, wherein the sheath has a first cross sectional outer diameter and a first lumen inner diameter, and an expanded configuration, wherein the sheath has a second cross sectional outer diameter and a second lumen inner diameter; a removable expansion retention member configured to retain the expandable sheath in the collapsed configuration; and said expansion retention member comprises a corset and tensile member assembly wherein the tensile member may be tensioned proximally to release the corset and allow expansion to the expanded configuration; wherein in the collapsed configuration, the sheath is configured to be advanced across at least a portion of the diseased vessel to a position adjacent the distal location without substantial size interference between the first cross sectional outer diameter of the sheath and an inner diameter profile of a lumen of the diseased vessel; wherein upon positioning the collapsed configuration to the desired position adjacent to the distal location, the sheath may be expanded to the expanded configuration to facilitate passage of one or more relatively large diameter structures through the lumen that are larger in diameter than the first cross sectional outer diameter, the expanded configuration diverting at least a portion of the flow of blood through the diseased vessel across the porous wall of the sheath; wherein the expandable sheath is self-expanding from the collapsed configuration to the expanded configuration; and wherein upon completion of passage of the one or more relatively large diameter structures, the sheath may be collapsed back to the collapsed configuration.