# US 8,784,362 B2 · Catheter with formed guide wire ramp > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,784,362 B2 - Document ID: US8784362B2 - Status: Granted - Kind: B2 - Application number: 13/782,281 - Filed: 2013-03-01 - Published: 2013-06-20 - Granted: 2014-07-22 - Earliest claimed: 2002-10-08 - Assignees: Boston Scientific Scimed, Inc. - Applicants: Boston Scientifi Scimed, Inc. - Inventors: Michael P. Boutilette; James E. Windheuser; Oscar R. Carrillo, Jr. - Web page: https://patentgrep.com/patent/US8784362B2 ## CPC - A61M 25/0172: {Exchanging a guidewire while keeping the catheter in place} - A61M 25/0029: {characterized by features relating to least one lumen located at the middle part of the catheter, e.g. slots, flaps, valves, cuffs, apertures, notches, grooves or rapid exchange ports (catheter shaft surface irregularities A61M2025/006)} - A61M 25/0108: {using radio-opaque or ultrasound markers} - B26D 7/00: Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting (cutters B26D1/00; arrangements for guiding hand cutting tools B26B29/06; punching tools or dies, cutting-out knives or dies B26F) - A61M 2025/0008: {having visible markings on its surface, i.e. visible to the naked eye, for any purpose, e.g. insertion depth markers, rotational markers or identification of type} - A61M 2025/004: {characterized by lumina being arranged circumferentially} - A61M 2025/0177: {having external means for receiving guide wires, wires or stiffening members, e.g. loops, clamps or lateral tubes} - A61M 2025/0183: {Rapid exchange or monorail catheters} - A61M 2025/0188: {having slitted or breakaway lumens} - A61M 2025/107: {having a longitudinal slit in the balloon} - Y10T 83/0405: With preparatory or simultaneous ancillary treatment of work - A61M: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY (introducing media into or onto the bodies of animals A61D7/00; means for inserting tampons A61F13/26; devices for administering food or medicines orally A61J; containers for collecting, storing or administering blood or medical fluids A61J1/05); DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY (surgery A61B; chemical aspects of surgical articles A61L); DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR {(Electrotherapy, e.g. producing anaesthesia by the use of alternating or intermittent currents A61N1/36021)} - B26D: CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING (for growing crops or plants A01D, A01G; for fodder or straw A01F; for bulk butter A01J; for dough A21C; slaughtering A22B; for tobacco, cigars or cigarettes A24; marking-out, perforating or making buttonholes A41H25/00; manufacturing footwear A43D; brushmaking A46D; surgery A61B; disintegrating, mincing or shredding in general B02C; cutting wire, making pins or nails B21F, B21G; of the kind used formetal B23; cutting by abrasive fluid jets B24C5/02; hand-held cutting tools B26B; perforating, cutting-out, stamping-out or punching, or severing by means other than cutting B26F; for wood B27; for stone B28D; working of plastics or substances in a plastic state B29; making boxes, cartons, envelopes or bags, of paper or similarly worked materials, e.g. metal foil, B31B; article or web delivery apparatus incorporating cutting or line-perforating devices B65H35/00; for leather or upholstery B68, C14B; for glass C03B; making matches C06F; for peat C10F; for sugar C13B45/00; for textile materials D06H; civil engineering, building, mining, see Section E; for light guides G02B6/25; cutting processed photographic material G03D15/04) - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A rapid exchange catheter comprises a guide wire lumen including a substantially sealed portion in which a lumen wall extends around an entire periphery thereof and a channel portion including a channel opening the lumen to an exterior of the catheter, wherein a width of the channel is less than a maximum width of the channel portion. A guide wire ramp extends into the channel portion, with the ramp extending further into the lumen of the channel portion as a distal end of the ramp is approached. ## Claims ### Claim 1 A catheter, comprising: a catheter shaft having a guidewire lumen extending therein, the catheter shaft having an outer surface; a first opening in the outer surface, the first opening being disposed proximally of a distal end of the catheter shaft; a second opening in the outer surface, the second opening being disposed proximally of the first opening; a channel extending through the outer surface extending between the first opening and the second opening, the channel defined by a first wall and a second wall; wherein an angled cut is formed in a portion of the first wall of the channel, the angled cut defining a ramp member formed from a portion of the first wall; and wherein the ramp member extends into the guidewire lumen. ### Claim 2 (depends on 1) The catheter of claim 1, wherein the angled cut extends from the channel proximally at an acute angle. ### Claim 3 (depends on 1) The catheter of claim 1, wherein an ancillary lumen is defined in the catheter shaft. ### Claim 4 (depends on 1) The catheter of claim 1, wherein a distal portion of the catheter shaft includes one or more visual marker members. ### Claim 5 (depends on 1) The catheter of claim 1, wherein a distal portion of the catheter shaft includes a radiopaque marker. ### Claim 6 (depends on 1) The catheter of claim 1, wherein the channel includes a C-shaped channel. ### Claim 7 (depends on 1) The catheter of claim 1, wherein the guidewire lumen has a diameter, wherein the channel has a channel width, and wherein the channel width is smaller than the diameter of the guidewire lumen. ### Claim 8 (depends on 1) The catheter of claim 1, wherein the channel includes a U-shaped channel. ### Claim 9 (depends on 1) The catheter of claim 1, wherein the guidewire lumen has a diameter, wherein the channel has a channel width, and wherein the channel width is substantially the same size as the diameter of the guidewire lumen. ### Claim 10 A method for manufacturing a catheter, the method comprising: providing a catheter shaft having a guidewire lumen; forming an elongated channel in the catheter shaft, the elongated channel defined by a first wall and a second wall, wherein a width of the elongated channel is less than a diameter of the guidewire lumen; cutting an angled slit in the first wall to form a partially detached portion of a wall of the catheter shaft; and shifting the partially detached portion of the first wall radially into the guidewire lumen to form a guidewire ramp. ### Claim 11 (depends on 10) The method of claim 10, wherein the guidewire ramp includes a first side corresponding to the first wall of the elongated channel in which the angled slit is cut and a second side corresponding to the angled slit. ### Claim 12 (depends on 10) The method of claim 10, wherein cutting an angled slit in the first wall to form a partially detached portion of the first wall of the catheter shaft includes cutting the angled slit with a heated mandrel. ### Claim 13 (depends on 10) The method of claim 10, wherein cutting an angled slit in the first wall to form a partially detached portion of the first wall of the catheter shaft includes cutting the angled slit in the first wall of the catheter shaft proximally. ### Claim 14 (depends on 13) The method of claim 13, wherein cutting the angled slit in the first wall of the catheter shaft proximally includes cutting the angled slit in the first wall of the catheter shaft proximally at an acute angle. ### Claim 15 (depends on 10) The method of claim 10, wherein the elongated channel has a channel width and wherein the channel width is smaller than the diameter of the guidewire lumen. ### Claim 16 (depends on 10) The method of claim 10, wherein the elongated channel has a channel width, and wherein the channel width is substantially the same size as the diameter of the guidewire lumen. ### Claim 17 A method for forming a rapid exchange catheter, the method comprising: forming a channel in a catheter having a guidewire lumen, wherein the channel opens a channel portion of the guidewire lumen to an outside of the catheter; cutting a slit extending from the channel proximally at an angle to form a partially detached portion of a wall of the catheter; and moving a distal end of the partially detached portion radially of the wall of the catheter into the guidewire lumen to form a ramp, wherein the channel portion includes a pair of walls that are separated from each other along a length of the channel portion and the slit is cut into one of the pair of walls. ### Claim 18 (depends on 17) The method of claim 17, wherein cutting a slit extending from the channel proximally at an angle to form a partially detached portion of a wall of the catheter includes cutting the slit proximally at an acute angle. ### Claim 19 (depends on 17) The method of claim 17, wherein the guidewire lumen has a diameter, wherein the channel has a channel width, and wherein the channel width is smaller than the diameter of the guidewire lumen. ### Claim 20 (depends on 17) The method of claim 17, wherein the guidewire lumen has a diameter, wherein the channel has a channel width, and wherein the channel width is substantially the same size as the diameter of the guidewire lumen.