# US 11,305,103 B2 · Blood pump with in-situ attaching motor stators > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,305,103 B2 - Document ID: US11305103B2 - Status: Granted - Kind: B2 - Application number: 16/733,386 - Filed: 2020-01-03 - Published: 2020-05-07 - Granted: 2022-04-19 - Earliest claimed: 2016-10-24 - Assignees: HeartWare, Inc. - Applicants: HeartWare, Inc. - Inventors: Jeffrey A. Larose; Gill B. Bearnson; Stanley P. Mack; Charles R. Shambaugh - Web page: https://patentgrep.com/patent/US11305103B2 ## CPC - A61M 60/419: the force acting on the blood contacting member being permanent magnetic, e.g. from a rotating magnetic coupling between driving and driven magnets - A61M 60/13: by means of a catheter allowing explantation, e.g. catheter pumps temporarily introduced via the vascular system - A61M 60/135: inside a blood vessel, e.g. using grafting - A61M 60/237: the blood flow through the rotating member having mainly axial components, e.g. axial flow pumps - A61M 60/422: the force acting on the blood contacting member being electromagnetic, e.g. using canned motor pumps - A61M 60/824: Hydrodynamic or fluid film bearings - A61M 60/865: Devices for guiding or inserting pumps or pumping devices into the patient's body - 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 A housing having an interior and an exterior. A pump rotor is configured to be received within the interior of the housing, the pump rotor includes a magnet. A stator having a delivery configuration and an operative configuration is included, the stator in the delivery configuration has a delivery diameter, the stator in the operative configuration being configured to be disposed around the exterior of the housing and to form an assembled pump having a diameter greater than the delivery diameter. ## Claims ### Claim 1 A blood pump, comprising: a housing having an interior and an exterior, the housing defining a housing axis and an axial direction along the housing axis; a pump rotor configured to be received within the interior of the housing, the pump rotor including a magnet; and a stator having a plurality of stator units, each stator unit having a coil and a delivery configuration and an operative configuration, the plurality of stator units in the delivery configuration having a delivery diameter, the plurality of stators units in the operative configuration being configured to: be disposed around the exterior of the housing; and form an assembled pump having a diameter greater than the delivery diameter. ### Claim 2 (depends on 1) The blood pump of claim 1, wherein the housing defines a housing axis and axial directions along the housing axis, each coil within each unit of the plurality of stator units including a coil axis and an electrical conductor arranged in one or more turns surrounding the coil axis, the stator in the operative configuration having the units disposed around the housing axis with the coil axes of the units transverse to the housing axis. ### Claim 3 (depends on 2) The blood pump of claim 2, wherein in the delivery configuration: the stator has a delivery axis; the coil axes are transverse to the delivery axis; and at least one of the units is offset from another one of the units in a direction along the delivery axis. ### Claim 4 (depends on 3) The blood pump of claim 3, wherein in the delivery configuration the units of the stator are disposed in a row along the delivery axis, with each of the units being offset from an adjacent one of the units in a direction along the delivery axis. ### Claim 5 (depends on 3) The blood pump of claim 3, wherein the housing has an exterior surface including one or more arcuate surfaces coaxial with the housing axis, and wherein each of the units has an interior surface in the form of a partial surface of revolution around a unit axis transverse to the coil axis of that unit, the interior surfaces of each units confronting the arcuate surfaces of the housing when the stator is in the operative configuration. ### Claim 6 (depends on 1) The blood pump of claim 1, wherein the stator includes a flexible member including one or more coils, the flexible member extending around the housing when the stator is in the operative condition. ### Claim 7 (depends on 6) The blood pump of claim 6, wherein when the stator is in the operative configuration, the flexible member forms a tube and the pump housing is disposed within the tube, and wherein the flexible member is folded when the stator is in the delivery configuration. ### Claim 8 A blood pump implantation assembly, comprising: a delivery device; a pump mounted to the delivery device proximate a distal end thereof, the pump including a pump housing, a rotor configured to be disposed within the pump housing and a stator having stator units, the pump in the operative configuration having the stator units disposed around the housing axis with the coil axes of the stator units transverse to the housing axis; the pump in a delivery condition having the stator units offset from the pump housing and having the stator define a first diameter, the delivery device being configured to transition the pump from the delivery condition to an operative condition in which the stator is in an operative configuration disposed around the pump housing and defines a second diameter larger than the first diameter. ### Claim 9 (depends on 8) The assembly of claim 8, wherein the housing has a housing axis extending proximally and distally when the pump is in the delivery condition, each stator unit including a coil having a coil axis and an electrical conductor arranged in one or more turns surrounding the coil axis. ### Claim 10 (depends on 9) The assembly of claim 9, wherein in the delivery configuration the coil axes are transverse to a major longitudinal axis of the delivery device and at least one of the units is offset from another one of the units along the major longitudinal axis. ### Claim 11 (depends on 10) The assembly of claim 10, wherein in the delivery configuration the units of the stator are arranged successively along the major longitudinal axis. ### Claim 12 (depends on 11) The assembly of claim 11, wherein the delivery device is configured to advance the units along the major longitudinal axis toward the pump housing to bring the pump from the delivery condition to the operative condition. ### Claim 13 (depends on 8) The assembly of claim 8, wherein the stator includes a flexible member including one or more coils, the flexible member extending around the housing when the pump is in the operative condition. ### Claim 14 (depends on 13) The assembly of claim 13, wherein the flexible member is a tube having a wall, the wall defining a bore and the housing being disposed within the bore when the pump is in the operative condition, the flexible member being folded along one or more fold axes when the pump is in the delivery configuration. ### Claim 15 (depends on 8) The assembly of claim 8, wherein the pump is releasably mounted to the delivery device. ### Claim 16 A method of implanting a blood pump in the body of a living subject, comprising: advancing the pump into the body of the subject to a target location, the pump being in a delivery condition in which a stator of the pump has stator units separate from a pump housing and the pump has a delivery diameter, each stator unit having a coil; and transitioning the stator units to an operative condition in which the stator is disposed around the pump housing and the pump has an operative diameter greater than the delivery diameter when in the operative condition. ### Claim 17 (depends on 16) The method of claim 16, further comprising applying electrical power to the stator to provide a rotating magnetic field within the housing while the pump is in the operative condition a rotor within the housing is rotated and the rotor impels blood through the housing. ### Claim 18 (depends on 17) The method of claim 17, wherein advancing the pump into the body of the subject to a target location step includes advancing the pump through vasculature of the subject. ### Claim 19 (depends on 16) The method of claim 16, wherein transitioning the pump to an operative condition includes at least one from the group consisting of retracting and advancing a portion of a delivery device, the delivery device including the stator in the delivery condition. ### Claim 20 (depends on 16) The method of claim 16, further including sliding the stator units along a respective shaft.