# US 5,911,717 A · Catheter deliverable thrombogenic apparatus and method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,911,717 A - Document ID: US5911717A - Status: Granted - Kind: A - Application number: 08/819,611 - Filed: 1997-03-17 - Granted: 1999-06-15 - Earliest claimed: 1997-03-17 - Assignees: Precision Vascular Systems, Inc. - Inventors: Stephen C. Jacobsen; Clark C. Davis; John A. Lippert - Web page: https://patentgrep.com/patent/US5911717A ## CPC - A61B 17/1215: {comprising additional materials, e.g. thrombogenic, having filaments, having fibers, being coated} - A61B 17/12022: {Occluding by internal devices, e.g. balloons or releasable wires (plugging an opening in the wall of an organ A61B17/0057; occluders for the cervical canal A61F6/146; vas deferens occluders A61F6/20)} - A61B 17/12109: {in a blood vessel} - A61B 17/12163: {having a string of elements connected to each other} - A61B 17/12172: {having a pre-set deployed three-dimensional shape (methods of manufacturing A61B2017/00526)} - A61B 17/12177: {comprising additional materials, e.g. thrombogenic, having filaments, having fibers or being coated} - A61F 2002/016: {made from wire-like elements} - A61F 2230/0006: circular - A61F 2230/0091: helically-coiled or spirally-coiled, i.e. having a 2-D spiral cross-section - 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 A catheter deliverable thrombogenic device includes a catheter for threading into a body vasculature passageway to a target location, and a resilient wire element coiled and shaped to occupy a certain volume when unconstrained, and to straighten when inserted lengthwise into and constrained by the catheter, for ultimate discharge therefrom to expand and occupy the target location. The wire element includes a plurality of cuts on the exterior surface thereof at selected locations to increase the flexibility of the wire element. ## Claims ### Claim 1 Thrombogenic apparatus comprising a catheter for threading into a body vasculature passageway to a target location, and a resilient wire means shaped to occupy a certain volume when unconstrained, and to straighten when inserted lengthwise into and constrained by the catheter, for ultimate discharge therefrom to expand and occupy the target location, said wire means formed into a coil and including a plurality of cuts on the exterior surface thereof at selected locations, to increase the flexibility of the wire means. ### Claim 2 (depends on 1) An apparatus as in claim 1 wherein said coil has a diameter which becomes gradually smaller toward a distal end. ### Claim 3 (depends on 2) An apparatus as in claim 2 wherein the smaller diameter coils near and at the distal end are tightly wound to inhibit flow of blood therepast, when inserted into a blood vessel. ### Claim 4 (depends on 2) An apparatus as in claim 2 wherein the coil diameter at a proximal end is from about 3 to 12 millimeters, and wherein the coil diameter at the distal end is from about 1 to 3 millimeters. ### Claim 5 (depends on 1) An apparatus as in claim 1 wherein said wire includes more cuts per unit length near the distal end than at other locations, such that the distal end is more flexible. ### Claim 6 (depends on 1) An apparatus as in claim 1 further comprising lengths of fiber disposed in the cuts to extend outwardly of the wire to assist in thrombosis. ### Claim 7 (depends on 6) An apparatus as in claim 6 wherein the fibers are made of material selected from the group consisting of dacron and silk. ### Claim 8 (depends on 1) An apparatus as in claim 1 wherein said wire is solid. ### Claim 9 (depends on 1) An apparatus as in claim 1 wherein said wire means is made of an alloy of nickel and titanium. ### Claim 10 (depends on 9) An apparatus as in claim 9 wherein said wire means has a diameter of from about 0.008 to 0.060 inches. ### Claim 11 A thrombogenic apparatus comprising a catheter for threading into a body vasculature passageway to a target location, and a resilient, tubular wire having sidewalls surrounding a central hollow shaped to occupy a certain volume when unconstrained, and to straighten when inserted lengthwise into and constrained by the catheter, for ultimate discharge therefrom to expand and occupy the target location, said resilient, tubular wire including a plurality of cuts on the exterior surface thereof at selected locations, to increase the flexibility of said wire. ### Claim 12 (depends on 11) An apparatus as in claim 11 wherein at least some of said cuts extend through the sidewalls to the central hollow. ### Claim 13 (depends on 12) An apparatus as in claim 12 further including medication disposed in the central hollow for leaking therefrom through the cuts which extend through the sidewalls, when the apparatus is placed at the target location. ### Claim 14 (depends on 11) An apparatus as in claim 11 further including fiber disposed in the hollow of the wire to assist in thrombosis. ### Claim 15 Thrombogenic apparatus comprising a catheter for threading into a body vasculature passageway to a target location, and a resilient wire coiled and shaped to occupy a certain volume when unconstrained, and to straighten when inserted lengthwise into and constrained by the catheter, for discharge therefrom to expand and occupy the target location, said wire formed to have a coil diameter which becomes gradually smaller toward a distal end and having a plurality of cuts on an exterior surface thereof. ### Claim 16 (depends on 15) Apparatus as in claim 15 wherein the smaller diameter coils near and at the distal end are tightly wound to inhibit flow of blood therepast when inserted into a blood vessel. ### Claim 17 (depends on 15) Apparatus as in claim 15 wherein said wire is solid. ### Claim 18 (depends on 15) Apparatus as in claim 15 wherein said wire is tubular having sidewalls surrounding a central hollow. ### Claim 19 (depends on 18) Apparatus as in claim 18 wherein at least some of said plurality of cuts extend through the sidewalls to the central hollow. ### Claim 20 (depends on 19) Apparatus as in claim 19 further including medication disposed in the central hollow for leaking therefrom through the cuts which extend through the sidewalls, when the apparatus is placed at the target location.