# US 11,998,465 B2 · Radial expansion and contraction features of medical devices > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,998,465 B2 - Document ID: US11998465B2 - Status: Granted - Kind: B2 - Application number: 17/345,959 - Filed: 2021-06-11 - Published: 2021-09-30 - Granted: 2024-06-04 - Earliest claimed: 2015-05-20 - Assignees: Elemental Portfolio, LLC - Applicants: Elemental Portfolio, LLC - Inventors: Paul Sherburne - Web page: https://patentgrep.com/patent/US11998465B2 ## CPC - A61F 2/92: Stents in the form of a rolled-up sheet expanding after insertion into the vessel {, e.g. with a spiral shape in cross-section} - A61F 2/9517: {handle assemblies therefor} - A61B 17/00: Surgical instruments, devices or methods (A61B18/00 takes precedence; dental tools A61C3/00; eye surgery A61F9/007; ear surgery A61F11/20) - A61F 2/94: Stents retaining their form, i.e. not being deformable, after placement in the predetermined place - A61F 2/95: Instruments specially adapted for placement or removal of stents or stent-grafts - A61F 2/958: Inflatable balloons for placing stents or stent-grafts - A61M 29/00: Dilators with or without means for introducing media, e.g. remedies - A61B 17/12036: {partial occlusion} - A61B 2017/00398: {using powered actuators, e.g. stepper motors, solenoids} - A61B 2017/00402: {Piezo electric actuators} - A61F 2/848: having means for fixation to the vessel wall, e.g. barbs - A61F 2250/001: for adjusting a 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) - 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)} ## Abstract This disclosure concerns medical devices, such as catheters and implantable devices, having radially adjustable features. More particularly, the catheters and implantable devices can radially expand and contract to perform various functions within the body. Expansion and contraction can be performed by a radially adjustable structure mounted on the medical device. For example, a medical device can include an body configured for in vivo introduction, a strip attached to the body and rolled into a ring such that layers of the strip radially overlap each other, and at least one motor actuatable by electrical energy to move the radially overlapping layers of the strip relative to one another and change a diameter of the ring and the body. ## Claims ### Claim 1 A medical assembly comprising: an implant delivery device comprising a handle, and a catheter extending from the handle, the catheter having a distal end section comprising one or more motors configured to be inserted into a vessel of a patient; and an implantable medical device coupled to the distal end section of the catheter, wherein the one or more motors are configured to produce radial expansion of the implantable medical device from a radially compressed state to a radially expanded state inside the patient; wherein the distal end section of the catheter comprises one or more radially adjustable structures and the one or more motors are configured to radially expand the one or more radially adjustable structures to radially expand the implantable medical device from the radially compressed state to the radially expanded state inside the patient; wherein the catheter comprises an elongated catheter body and the one or more radially adjustable structures are disposed on the catheter body; and wherein the one or more radially adjustable structures are located within one or more trenches formed on an outer surface of the catheter body. ### Claim 2 (depends on 1) The medical assembly of claim 1, wherein the catheter further comprises a compliant layer covering the one or more radially adjustable structures. ### Claim 3 (depends on 1) The medical assembly of claim 1, wherein the one or more motors are configured to radially expand the one or more radially adjustable structures in an expansion phase and radially compress the one or more radially adjustable structures in a contraction phase. ### Claim 4 (depends on 1) The medical assembly of claim 1, wherein the one or more motors comprise piezoelectric motors. ### Claim 5 A medical assembly comprising: an implant delivery device comprising a handle comprising a controller including a user input, a catheter extending from the handle, the catheter having a distal end section configured to be inserted into a vessel of a patient, the distal end section comprising a plurality of motors and a plurality of radially adjustable structures, and one or more electrical conductors extending through the catheter, wherein the one or more electrical conductors electrically connect the motors to the controller; wherein the controller is configured to generate control signals that actuate the motors based on input received by the user input; and an implantable medical device coupled to the distal end section of the catheter; wherein the controller is configured to actuate the motors, which cause the radially adjustable structures to expand and cause the implantable medical device to radially expand from a radially compressed state to a radially expanded state inside the patient; wherein the plurality of radially adjustable structures comprises a first radially adjustable structure and a second radially adjustable structure, wherein the first radially adjustable structure is radially expandable from a first diameter to a second diameter, wherein the second radially adjustable structure is radially expandable from a third diameter to a fourth diameter, wherein the first and third diameters are the same, and wherein the second and fourth diameters are different; and wherein the motors are independently controllable with respect to each other by the controller such that the plurality of motors can radially expand the first and second radially adjustable structures different amounts to the second and fourth diameters, respectively, such that the implantable medical device expands from the radially compressed state to the radially expanded state in which the implantable medical device varies in diameter along its length. ### Claim 6 (depends on 5) The medical assembly of claim 5, wherein the motors of the plurality of motors are axially spaced from each other along the distal end section of the catheter. ### Claim 7 (depends on 5) The medical assembly of claim 5, wherein the plurality of radially adjustable structures comprises expandable rings. ### Claim 8 (depends on 5) The medical assembly of claim 5, wherein the plurality of radially adjustable structures comprises coiled strips. ### Claim 9 (depends on 5) The medical assembly of claim 5, wherein the catheter comprises a lumen and the handle comprises a port, wherein the lumen and the port define a passageway for receiving a guidewire. ### Claim 10 (depends on 5) The medical assembly of claim 5, wherein the implantable medical device comprises a valve. ### Claim 11 (depends on 5) The medical assembly of claim 5, wherein the implantable medical device is mounted in the radially compressed state around the distal end section of the catheter, the plurality of motors, and the plurality of radially adjustable structures.