# US 2017/0303944 A1 · Vascular and bodily duct treatment devices and methods > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2017/0303944 A1 - Document ID: US20170303944A1 - Status: Published application - Kind: A1 - Application number: 15/645,752 - Filed: 2017-07-10 - Published: 2017-10-26 - Earliest claimed: 2009-07-08 - Assignees: Concentric Medical, Inc. - Applicants: Concentric Medical, Inc. - Inventors: Ryan M. Grandfield; Scott D. Wilson; Elliot H. Sanders - Web page: https://patentgrep.com/patent/US20170303944A1 ## CPC - A61B 17/221: Gripping devices in the form of loops or baskets {for gripping calculi or similar types of obstructions (surgical snare instruments A61B17/32056)} - A61B 17/3207: Atherectomy devices {working by cutting or abrading; Similar devices specially adapted for non-vascular obstructions (A61B17/32037 takes precedence; endoscopic cutting instruments A61B17/320016)} - A61B 17/320725: {with radially expandable cutting or abrading elements (A61B17/32075 takes precedence)} - A61B 17/32075: {Pullback cutting; combined forward and pullback cutting, e.g. with cutters at both sides of the plaque} - A61B 2017/00778: {Operations on blood vessels (A61B2017/22097, A61B2017/320741 take precedence)} - A61B 2017/22045: {fixed to the catheter; guiding tip} - A61B 2017/2215: {having an open distal end} - A61F 2/915: with bands having a meander structure, adjacent bands being connected to each other - 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 2002/825: {having longitudinal struts} - A61F 2230/0006: circular - A61F 2230/0069: cylindrical - A61F 2230/0097: Harpoon-shaped - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) - 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) ## Abstract Devices including, but not limited to, a self-expandable member having a proximal end portion and a main body portion. The self-expandable member is movable from a first delivery position to a second placement position, in the first delivery position the expandable member being in an unexpanded position and having a nominal first diameter and in the second position the expandable member being in a radially expanded position and having a second nominal diameter greater than the first nominal diameter for deployment within a vessel or duct of a patient. The expandable member includes a plurality of cell structures with the cell structures in the main body portion extending circumferentially around a longitudinal axis of the expandable member and the cell structures in the proximal end portion extending less than circumferentially around the longitudinal axis of the expandable member. ## Claims ### Claim at position 1 1-20. (canceled) ### Claim 21 An embolic obstruction retrieval device comprising: an elongate self-expandable member having a radially expanded configuration and a radially constrained configuration, the expandable member being biased in the expanded configuration and comprising a plurality of generally longitudinal undulating elements with adjacent undulating elements of the plurality being interconnected in a manner to form a plurality of diagonally disposed cells defining a cell pattern, the expandable member having a proximal portion, an elongate central body portion, and a distal portion, wherein the cell structures in the central body portion are circumferentially disposed about a longitudinal axis of the expandable member, and wherein a longitudinal slit free of undulating elements extends lengthwise along the central body portion of the expandable member. ### Claim 22 (depends on 21) The embolic obstruction retrieval device of claim 21, wherein the slit extends along an entire length of the expandable member. ### Claim 23 (depends on 21) The embolic obstruction retrieval device of claim 21, wherein the slit extends diagonally, the slit defining a spiral free of undulating elements around the longitudinal axis of the central body portion. ### Claim 24 (depends on 23) The embolic obstruction retrieval device of claim 23, wherein the slit extends diagonally along an entire length of the expandable member. ### Claim 25 (depends on 21) The embolic obstruction retrieval device of claim 21, wherein a first undulating element in the proximal portion comprises a first substantially linear rail, and a second undulating element in the proximal portion forms a second substantially linear rail, each of the first and second substantially linear rails forming acute angles with the longitudinal axis of the expandable member, and wherein the slit originates at one of the first and second substantially linear rails. ### Claim 26 (depends on 21) The embolic obstruction retrieval device of claim 21, wherein the plurality of adjacent undulating elements are disposed and interconnected in a manner so as to cause each cell of the plurality to be diagonally disposed relative to another cell of the plurality. ### Claim 27 (depends on 21) The embolic obstruction retrieval device of claim 21, further comprising a proximally extending elongate wire coupled to a proximal-most end of the proximal portion of the expandable member. ### Claim 28 (depends on 21) The embolic obstruction retrieval device of claim 21, further comprising a distally extending wire segment coupled to a distal-most end of the distal portion of the expandable member. ### Claim 29 (depends on 21) The embolic obstruction retrieval device of claim 21, wherein the cells in the central body portion of the expandable member are symmetrically aligned with one another along a length of the central body portion. ### Claim 30 (depends on 21) The embolic obstruction retrieval device of claim 21, wherein the cells in the central body portion of the expandable member are symmetrically unaligned with one another along a length of the central body portion. ### Claim 31 (depends on 21) The embolic obstruction retrieval device of claim 21, wherein at least a portion of the expandable member is coated with a radiopaque material or otherwise comprises radiopaque markers. ### Claim 32 An embolic obstruction retrieval device comprising: an elongate self-expandable member having a radially expanded configuration and a radially constrained configuration, the expandable member being biased in the expanded configuration and comprising a plurality of generally longitudinal undulating elements with adjacent undulating elements of the plurality being interconnected in a manner to form a plurality of diagonally disposed cells defining a cell pattern, the expandable member having a proximal portion, an elongate central body portion, and a distal portion, wherein the cell structures in the central body portion are circumferentially disposed about a longitudinal axis of the expandable member, wherein a longitudinal slit free of undulating elements extends lengthwise and diagonally along the expandable member, the slit defining a spiral free of undulating elements around the longitudinal axis, and wherein a first undulating element in the proximal portion comprises a first substantially linear rail, and a second undulating element in the proximal portion forms a second substantially linear rail, each of the first and second substantially linear rails forming acute angles with the longitudinal axis of the expandable member, and wherein the slit originates at one of the first and second substantially linear rails. ### Claim 33 (depends on 32) The embolic obstruction retrieval device of claim 32, wherein the slit extends along an entire length of the expandable member. ### Claim 34 (depends on 32) The embolic obstruction retrieval device of claim 32, wherein the plurality of adjacent undulating elements are disposed and interconnected in a manner so as to cause each cell of the plurality to be diagonally disposed relative to another cell of the plurality. ### Claim 35 (depends on 32) The embolic obstruction retrieval device of claim 32, wherein at least a portion of the expandable member is coated with a radiopaque material or otherwise comprises radiopaque markers.