# US 2019/0170153 A1 · Functional element, in particular fluid pump, having a housing and a conveying element > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0170153 A1 - Document ID: US20190170153A1 - Status: Published application - Kind: A1 - Application number: 16/139,385 - Filed: 2018-09-24 - Published: 2019-06-06 - Earliest claimed: 2009-09-22 - Assignees: Ecp Entwicklungsgesellschaft Mbh - Applicants: Ecp Entwicklungsgesellschaft Mbh - Inventors: Mario Scheckel - Web page: https://patentgrep.com/patent/US20190170153A1 ## CPC - A61M 60/148: in line with a blood vessel using resection or like techniques, e.g. permanent endovascular heart assist devices - A61M 60/13: by means of a catheter allowing explantation, e.g. catheter pumps temporarily introduced via the vascular system - A61M 60/17: inside a ventricle, e.g. intraventricular balloon pumps - A61M 60/237: the blood flow through the rotating member having mainly axial components, e.g. axial flow pumps - A61M 60/268: the displacement member being flexible, e.g. membranes, diaphragms or bladders - A61M 60/295: Balloon pumps for circulatory assistance - A61M 60/422: the force acting on the blood contacting member being electromagnetic, e.g. using canned motor pumps - A61M 60/808: specially adapted for deformable impellers, e.g. expandable impellers - A61M 60/81: Pump housings - A61M 60/833: Occluders for preventing backflow - A61M 60/857: Implantable blood tubes - A61M 60/861: Connections or anchorings for connecting or anchoring pumps or pumping devices to parts of the patient's body - F04D 29/181: {Axial flow rotors (F04D29/185 take precedence)} - A61M 60/414: transmitted by a rotating cable, e.g. for blood pumps mounted on a catheter - A61M 60/896: having flexible or resilient parts, e.g. flap valves - A61M 2205/0266: Shape memory materials - Y10T 137/85978: With pump - 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)} - F04D: NON-POSITIVE-DISPLACEMENT PUMPS (engine fuel-injection pumps F02M; ion pumps H01J41/12; electrodynamic pumps H02K44/02) - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract The invention relates to a fluid pump (1) having a housing (5) delimiting a fluid chamber (13) and having a conveying element (8) for the fluid disposed in the fluid chamber, the housing (5), with respect to the shape and/or size thereof, being able to be changed between at least a first, expanded state and a second, compressed state. The object, to stabilise adequately a corresponding housing, is achieved according to the invention by the housing having at least one stabilisation chamber (19, 20, 25, 26, 31) which can be supplied with a fluid pressure and is different from the fluid chamber, the first state of the housing being assigned to a first fluid pressure in the stabilisation chamber and the second state of the housing being assigned to a second fluid pressure. ## Claims ### Claim at position 1 1-21. (canceled) ### Claim 22 A fluid pump comprising: a catheter; a rotor; an expandable housing defining an inner chamber configured to receive the rotor, the housing configured to transition between a compressed state and an expanded state within a blood vessel, the housing having an outflow opening connected to the catheter and an inflow opening positioned distal of the outflow opening, wherein an outer diameter of the housing is smaller than an inner diameter of the blood vessel when the housing is in the expanded state, wherein the housing comprises an inner wall and an outer wall, wherein the rotor is disposed within the inner chamber and configured to be radially compressed by the inner wall when the housing is in the compressed state; and a one-way inflow valve positioned distal to the rotor. ### Claim 23 (depends on 22) The fluid pump according to claim 22, wherein the fluid pump further comprises an one-way outflow valve positioned proximal of the inflow valve. ### Claim 24 (depends on 23) The fluid pump according to claim 23, configured such that, during operation of the pump, fluid is suctioned in through the inflow opening and out through the outflow opening. ### Claim 25 (depends on 23) The fluid pump according to claim 23, wherein the outflow valve comprises outflow valve flaps configured to prevent fluid flow from the catheter to the inner chamber. ### Claim 26 (depends on 22) The fluid pump according to claim 22, wherein the inflow valve comprises inflow valve flaps configured to prevent fluid flow from exiting the inner chamber in a direction distal to the inflow valve. ### Claim 27 (depends on 22) The fluid pump according to claim 22, wherein the housing comprises the inflow valve. ### Claim 28 (depends on 22) The fluid pump according to claim 22, further comprising an elongate hose comprising a proximal end and a distal end, the proximal end of the elongate hose connected to the inflow opening of the housing and the distal end of the elongate hose configured to extend distally into a ventricle of the patient. ### Claim 29 (depends on 28) The fluid pump according to claim 28, wherein the elongate hose comprises the inflow valve. ### Claim 30 (depends on 28) The fluid pump according to claim 28, wherein the housing is configured to be positioned within an aorta and a distal end of the elongate hose is configured to extend distally across the aortic valve. ### Claim 31 (depends on 22) The fluid pump according to claim 22, wherein at least one of the inner and outer wall is configured to contract elastically from the expanded state into the compressed state, ### Claim 32 (depends on 22) The fluid pump according to claim 22, the fluid pump further comprising at least one expandable stabilization chamber, wherein a change in inflation pressure of at least one of the inner chamber or the at least one expandable stabilization chamber corresponds to a transition between the compressed state and the expanded state. ### Claim 33 (depends on 32) The fluid pump according to claim 32, wherein the at least one expandable stabilization chamber is disposed between the inner wall and the outer wall. ### Claim 34 (depends on 32) The fluid pump according to claim 32, wherein the at least one expandable stabilization chamber is configured to be supplied with a fluid pressure, wherein the compressed state of the housing corresponds to a first fluid pressure in the expandable stabilization chamber and the expanded state of the housing corresponding to a second fluid pressure in the expandable stabilization chamber, wherein the second fluid pressure is higher than the first fluid pressure. ### Claim 35 (depends on 32) The fluid pump according to claim 32, wherein the at least one expandable stabilization chamber comprises an expandable region, the expandable region having a distal end and a proximal end, and wherein a distal end of the rotor is positioned proximal to the distal end of the expandable region when the housing is in the compressed state. ### Claim 36 (depends on 22) The fluid pump according to claim 22, wherein the rotor comprises at least one blade, the blade being flexible elastically radially towards the rotor axis. ### Claim 37 (depends on 36) The fluid pump according to claim 36, wherein the rotor consists at least partially of a volume-compressible material. ### Claim 38 (depends on 32) The fluid pump according to claim 32, wherein the rotor is designed to be hub-free. ### Claim 39 A fluid pump comprising: a catheter; a rotor; an expandable housing defining an inner chamber configured to receive the rotor, the housing configured to transition between a compressed state and an expanded state within a blood vessel, the housing having an outflow opening connected to the catheter and an inflow opening positioned distal of the outflow opening, wherein an outer diameter of the housing is smaller than an inner diameter of the blood vessel when the housing is in the expanded state, wherein the housing comprises an inner wall and an outer wall, wherein the rotor is disposed within the inner chamber and configured to be radially compressed by the inner wall when the housing is in the compressed state; and a one-way outflow valve positioned proximal to the rotor. ### Claim 40 (depends on 39) The fluid pump according to claim 39, wherein the outflow valve comprises outflow valve flaps configured to prevent fluid flow from the catheter to the inner chamber. ### Claim 41 (depends on 39) The fluid pump according to claim 39, wherein the housing comprises the outflow valve. ### Claim 42 (depends on 39) The fluid pump according to claim 39, further comprising an elongate hose comprising a proximal end and a distal end, the proximal end of the elongate hose connected to the inflow opening of the housing and the distal end of the elongate hose configured to extend distally into a ventricle of the patient.