# US 11,298,218 B2 · Embolic filter system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,298,218 B2 - Document ID: US11298218B2 - Status: Granted - Kind: B2 - Application number: 16/478,712 - Filed: 2018-01-19 - Published: 2019-12-12 - Granted: 2022-04-12 - Earliest claimed: 2017-01-20 - Assignees: W. L. Gore & Associates, Inc. - Applicants: W. L. Gore & Associates, Inc. - Inventors: William D. Montgomery; Edward E. Shaw - Web page: https://patentgrep.com/patent/US11298218B2 ## CPC - A61F 2/013: {Distal protection devices, i.e. devices placed distally in combination with another endovascular procedure, e.g. angioplasty or stenting} - A61F 2/0105: {Open ended, i.e. legs gathered only at one side} - A61B 2017/2215: {having an open distal end} - A61B 2217/005: with suction drainage system - A61F 2/011: {Instruments for their placement or removal} - A61F 2/014: {Retrograde blood flow filters, i.e. device inserted against the blood flow direction} - A61F 2002/016: {made from wire-like elements} - A61F 2002/018: {made from tubes or sheets of material, e.g. by etching or laser-cutting} - A61F 2230/0067: conical - A61F 2230/0069: cylindrical - A61F 2250/0023: differing in porosity - A61F 2250/0024: made from both porous and non-porous parts, e.g. adjacent parts - A61F 2250/0039: differing in diameter - A61F: FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS (dental prosthetics A61C) - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) ## Abstract Various aspects of the present disclosure are directed toward an embolic filter system. The embolic filter system generally includes a filter and an elongated element. In some examples, the elongate element extends to a position distal to a proximal end of the filter and operates to protect against medical devices entangling with the filter. In some examples, the elongate element is soft and compliant and operates with a hemostatic seal to provide for a hemostatic seal within a lumen of the elongate element while maintaining the lumen as a working lumen through which medical devices can be passed. ## Claims ### Claim 1 An embolic filter comprising: an elongate element having a proximal end and a distal end, the elongate element including a first structural element and a first covering material, the elongate element having sufficient structural integrity to support being advanced within a delivery sheath; and a filter portion positioned such that the distal end of the elongate element extends beyond the filter portion, the filter portion including a second structural element and a second covering material, wherein a portion of the second covering material includes a plurality of perforations configured to filter embolic debris from blood flowing into the filter portion; wherein a distally directed force applied to the proximal end of the elongate element is operable to cause a distal translation of the elongate element and the filter portion to the delivery sheath. ### Claim 2 (depends on 1) The embolic filter of claim 1, wherein the first structure element is a self-expanding wire braid. ### Claim 3 (depends on 1) The embolic filter of claim 1, wherein the elongate element has sufficient structural integrity to support being advanced within the delivery sheath without requiring an introducer. ### Claim 4 (depends on 1) The embolic filter of claim 1, wherein the filter portion is blood permeable and wherein the plurality of perforations have an average size of one hundred microns. ### Claim 5 (depends on 1) The embolic filter of claim 1, wherein the second covering material of the filter portion is blood impermeable, and wherein plurality of perforations are formed in the second covering material such that blood is operable to flow through the second covering material of the filter portion. ### Claim 6 (depends on 1) The embolic filter of claim 1, wherein the elongate element is blood impermeable. ### Claim 7 (depends on 1) The embolic filter of claim 1, wherein the elongate element is configured to be advanced through a valve that operates to control a flow of blood through a lumen of the elongate element during a clinical procedure. ### Claim 8 (depends on 1) The embolic filter of claim 1, wherein one of the first and second covering materials include ePTFE. ### Claim 9 An endoprosthesis delivery device comprising: an expandable filter element mounted on a catheter shaft, having a capture area within the expandable filter element when the expandable filter element is deployed; an elongated conduit configured such that a leading end of the elongated conduit extends through and beyond the expandable filter element when the expandable filter element is deployed at a treatment site, the elongated conduit configured to allow for delivery of an endoprosthesis beyond the expandable filter element; and wherein the elongated conduit includes at least one aperture through a side wall providing fluid communication between the capture area and an interior of the elongated conduit; wherein the elongated conduit and the catheter shaft form a single monolithic unit. ### Claim 10 (depends on 9) The device of claim 9, wherein the elongated conduit extends from the catheter shaft. ### Claim 11 (depends on 9) The device of claim 9, wherein the at least one aperture is configured to facilitate a transfer of embolic debris captured within the filter to the elongated conduit.