# US 2013/0158653 A1 · Medical device delivery systems > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0158653 A1 - Document ID: US20130158653A1 - Status: Published application - Kind: A1 - Application number: 13/714,860 - Filed: 2012-12-14 - Published: 2013-06-20 - Earliest claimed: 2011-12-20 - Assignees: Boston Scientific Scimed, Inc. - Inventors: Randy Gamarra; David Tung; David J. Paul - Web page: https://patentgrep.com/patent/US20130158653A1 ## CPC - A61F 2/2436: {Deployment by retracting a sheath} - A61F 2/2418: {Scaffolds therefor, e.g. support stents} - A61F 2/9517: {handle assemblies therefor} - A61F 2210/0057: stretchable - A61M 25/0012: {with embedded structures, e.g. coils, braids, meshes, strands or radiopaque coils} - A61M 25/0074: {Dynamic characteristics of the catheter tip, e.g. openable, closable, expandable or deformable} - A61M 25/0108: {using radio-opaque or ultrasound markers} - A61M 2025/0004: {having two or more concentrically arranged tubes for forming a concentric catheter system} - A61M 2025/0175: {having telescopic features, interengaging nestable members movable in relations to one another} - A61M 2025/0681: {Systems with catheter and outer tubing, e.g. sheath, sleeve or guide tube} - F04C 2270/0421: Controlled or regulated - 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) - 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)} - F04C: ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS (engines F03C); ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS ## Abstract Medical device delivery systems and methods for making and using medical device delivery systems are disclosed. An example medical device delivery system may include an outer sheath. An inner catheter may be disposed within the outer sheath. The inner catheter may have a distal end. A tube extension may be coupled to the distal end of the inner catheter and may extend distally therefrom. The tube extension may be configured to shift between a first elongated configuration and a second shortened configuration. ## Claims ### Claim 1 A medical device delivery system, comprising: an outer sheath; an inner catheter disposed within the outer sheath, the inner catheter having a distal end; a tube extension coupled to the distal end of the inner catheter and extending distally therefrom; and wherein the tube extension is configured to shift between a first elongated configuration and a second shortened configuration. ### Claim 2 (depends on 1) The system of claim 1, wherein the tube extension includes a coil. ### Claim 3 (depends on 2) The system of claim 2, wherein the coil has an open pitch when the tube extension is in the elongated configuration and the coil has a closed pitch when the tube extension is in the shortened configuration. ### Claim 4 (depends on 1) The system of claim 1, wherein the tube extension includes a resilient polymer. ### Claim 5 (depends on 4) The system of claim 4, wherein the resilient polymer has a first thickness when the tube extension is in the elongated configuration and the coil has a second thickness greater than the first thickness when the tube extension is in the shortened configuration. ### Claim 6 (depends on 1) The system of claim 1, wherein the tube extension includes a tubular member having a plurality of slots formed therein. ### Claim 7 (depends on 7) The system of claim 7, wherein at least some of the slots are open when the tube extension is in the elongated configuration and wherein at least some of the slots are closed when the tube extension is in the shortened configuration. ### Claim 8 (depends on 1) The system of claim 1, wherein the tube extension has a nose cone attached thereto. ### Claim 9 (depends on 1) The system of claim 1, wherein the tube extension has a distal end that is free of a nose cone. ### Claim 10 (depends on 1) The system of claim 1, further comprising a valve implant releasably coupled to the inner catheter. ### Claim 11 (depends on 10) The system of claim 10, wherein the valve implant includes a replacement aortic valve. ### Claim 12 (depends on 1) The system of claim 1, wherein the outer sheath is configured to shift the nose cone extension between the elongated configuration and the shortened configuration. ### Claim 13 A medical device delivery system, comprising: an outer sheath; an inner catheter disposed within the outer sheath, the inner catheter having a distal portion; a valve implant releasably coupled to the distal portion of the inner catheter; a tube extension coupled to the distal portion of the inner catheter and extending distally therefrom; and wherein the tube extension has a distal end that is free of a nose cone. ### Claim 14 (depends on 13) The system of claim 13, wherein the tube extension has a constant outer diameter. ### Claim 15 (depends on 13) The system of claim 13, wherein the outer sheath is configured to shift between a sheathed configuration where the implant is sheathed within the outer sheath and a retracted configuration where the outer sheath is proximally refracted such that the implant is no longer sheathed within the outer sheath. ### Claim 16 (depends on 15) The system of claim 15, wherein the distal end of the tube extension extends to a position proximal of a distal end of the outer sheath when the outer sheath is in the sheathed configuration. ### Claim 17 (depends on 15) The system of claim 15, wherein the distal end of the tube extension extends to a position proximal of a distal end of the outer sheath when the outer sheath is in the retracted configuration. ### Claim 18 A medical device delivery system, comprising: an outer sheath having a distal portion; wherein the distal portion is configured to shift between a tapered configuration where the distal portion is deflected radially inward and an open configuration; an inner catheter disposed within the outer sheath, the inner catheter having a distal end; and a valve implant releasably coupled to the distal end of the inner catheter. ### Claim 19 (depends on 18) The system of claim 18, wherein the inner catheter is free of a tubular extension coupled to the distal end of the inner catheter and extending distally therefrom. ### Claim 20 (depends on 18) The system of claim 18, wherein the outer sheath shifts from the tapered configuration to the open configuration when the outer sheath is proximally retracted relative to the inner catheter.