Apparatus and methods for providing embolic protection during a transcatheter operation
AssigneeOxford University Innovation Limited
InventorsGiovanni Luigi DE MARIA, Yunlan ZHANG, Mohammad ALKHALIL, Zhong YOU, Yunfang YANG
Life of this patent
Estimating the term…
Abstract
In one arrangement, an apparatus comprises an elongate sheath insertable through the vascular system to a target site. A filter arrangement extends from a distal end of the sheath and comprises a porous membrane switchable between a radially contracted state and a radially expanded state. The radially expanded state is such as to span a cross-section of a blood vessel to block debris from travelling past the porous membrane. A filter actuation system hydraulically switches the porous membrane between the radially contracted state and the radially expanded state.
Claims26
An apparatus for providing embolic protection during a transcatheter operation, the apparatus comprising:
- an elongate sheath insertable through the vascular system of a subject to bring a distal end of the sheath to a target site in the vascular system;
- and
- a filter arrangement configured to extend from the distal end of the sheath, wherein:
- the filter arrangement comprises a porous membrane switchable between a radially contracted state and a radially expanded state, wherein the radially expanded state is such as to span a cross-section of a blood vessel at the target site to block debris generated upstream from travelling past the porous membrane through the porous membrane while allowing blood to flow past the porous membrane through the porous membrane;
- and
- a filter actuation system configured to hydraulically switch the porous membrane between the radially contracted state and the radially expanded state.
A method of providing embolic protection during a transcatheter operation, comprising:
- inserting an elongate sheath through the vascular system of a subject to bring a distal end of the sheath to a target site in the vascular system, wherein a porous membrane in a radially contracted state extends from the distal end of the sheath during the insertion;
- and
- switching the porous membrane into a radially expanded state such that the porous membrane spans a cross-section of a blood vessel at the target site to block debris generated upstream from travelling past the porous membrane through the porous membrane while allowing blood to flow past the porous membrane through the porous membrane, wherein:
- the switching of the porous membrane from the radially contracted state to the radially expanded state is performed hydraulically.
Dependencies are inferred from the claim text.