# US 12,005,208 B2 · Intravascular blood pump with balloon > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,005,208 B2 - Document ID: US12005208B2 - Status: Granted - Kind: B2 - Application number: 17/979,015 - Filed: 2022-11-02 - Published: 2023-05-04 - Granted: 2024-06-11 - Earliest claimed: 2017-05-04 - Assignees: Abiomed Europe GmbH - Applicants: Abiomed Europe GMBH - Inventors: Thorsten Siess; Christoph Nix; Walid Aboulhosn - Web page: https://patentgrep.com/patent/US12005208B2 ## CPC - A61M 25/1002: {characterised by balloon shape (A61M25/1006, A61M25/1009 take precedence)} - 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 60/833: Occluders for preventing backflow - A61M 60/861: Connections or anchorings for connecting or anchoring pumps or pumping devices to parts of the patient's body - A61M 60/896: having flexible or resilient parts, e.g. flap valves - A61M 2025/1052: {for temporarily occluding a vessel for isolating a sector} - A61M 2025/1061: {having separate inflations tubes, e.g. coaxial tubes or tubes otherwise arranged apart from the catheter tube} - A61M 2025/1084: {having features for increasing the shape stability, the reproducibility or for limiting expansion, e.g. containments, wrapped around fibres, yarns or strands} - A61M 2205/0266: Shape memory materials - 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 An intravascular blood pump (1) comprises a ring seal (10) that is configured to assume a collapsed configuration and an expanded configuration and configured to contact and seal against an inner wall of the patient's blood vessel when inserted therein in the expanded configuration. A support member (12; 13) is disposed inside the ring seal (10) in order to support the ring seal (10) from the inside, wherein the support member (12; 13) is configured to collapse at least partially when a predetermined pressure difference between a proximal area and a distal area of the blood vessel acting on the ring seal (10) is exceeded. ## Claims ### Claim 1 An intravascular blood pump for percutaneous insertion into a patient's blood vessel, comprising: a catheter, a pumping device attached to the catheter, the pumping device having a blood flow inlet, a blood flow outlet and a rotor so as to cause blood to flow from the blood flow inlet to the blood flow outlet, a ring seal disposed on the pumping device between the blood flow inlet and the blood flow outlet, the ring seal configured to assume a collapsed configuration and an expanded configuration and configured to contact and seal against an inner wall of the patient's blood vessel when inserted therein in the expanded configuration so as to separate a proximal area of the patient's blood vessel from a distal area of the patient's blood vessel, and a support member disposed inside the ring seal in order to support the ring seal from inside the ring seal, wherein the support member is configured to collapse at least partially when a predetermined pressure difference during operation of the intravascular blood pump between the proximal area of the patient's blood vessel and the distal area of the patient's blood vessel acts on the ring seal, wherein the support member withstands a pressure difference during operation of the intravascular blood pump between the proximal area of the patient's blood vessel and the distal area of the patient's blood vessel of up to 100 mmHg before it collapses, and wherein the support member comprises at least one elastic wire. ### Claim 2 (depends on 1) The intravascular blood pump of claim 1, wherein the ring seal comprises a flexible membrane. ### Claim 3 (depends on 2) The intravascular blood pump of claim 2, wherein the ring seal assumes the expanded configuration when the at least one elastic wire acts on the flexible membrane from interior of the ring seal to expand the ring seal. ### Claim 4 (depends on 2) The intravascular blood pump of claim 2, wherein the ring seal assumes the collapsed configuration when the at least one elastic wire is retracted from the ring seal. ### Claim 5 (depends on 4) The intravascular blood pump of claim 4, wherein the at least one elastic wire is retracted from the ring seal when the predetermined pressure difference during operation of the intravascular blood pump between the proximal area of the patient's blood vessel and the distal area of the patient's blood vessel acts on the ring seal. ### Claim 6 (depends on 1) The intravascular blood pump of claim 1, wherein the at least one elastic wire is made of a shape memory material. ### Claim 7 (depends on 6) The intravascular blood pump of claim 6, wherein the shape memory material is Nitinol. ### Claim 8 (depends on 1) The intravascular blood pump of claim 1, wherein the ring seal assumes the expanded configuration when the at least one elastic wire is advanced inside the ring seal from a lumen that extends along the catheter into the pumping device. ### Claim 9 (depends on 8) The intravascular blood pump of claim 8, wherein the at least one elastic wire is configured to be straightened by the lumen when the at least one elastic wire is advanced inside the ring seal from the lumen. ### Claim 10 (depends on 9) The intravascular blood pump of claim 9, wherein the at least one elastic wire assumes a predetermined curved shape once advanced into the ring seal. ### Claim 11 (depends on 10) The intravascular blood pump of claim 10, wherein the predetermined curved shape is a helical shape. ### Claim 12 (depends on 1) The intravascular blood pump of claim 1, wherein the support member is at least partially compressible. ### Claim 13 (depends on 1) The intravascular blood pump of claim 1, wherein the support member is biased to the expanded configuration. ### Claim 14 (depends on 1) The intravascular blood pump of claim 1, wherein an outer diameter of the ring seal in the expanded configuration is from about 1 cm to about 2.5 cm. ### Claim 15 (depends on 1) The intravascular blood pump of claim 1, configured to be inserted into a pulmonary artery. ### Claim 16 (depends on 1) The intravascular blood pump of claim 1, wherein the support member is configured to withstand a pressure difference during operation of the intravascular blood pump between the proximal area of the patient's blood vessel and the distal area of the patient's blood vessel of up to 20 mmHg before it collapses. ### Claim 17 (depends on 1) The intravascular blood pump of claim 1, wherein the support member is configured to withstand a pressure difference during operation of the intravascular blood pump between the proximal area of the patient's blood vessel and the distal area of the patient's blood vessel from about 5 mmHg to about 35 mmHg. ### Claim 18 (depends on 1) The intravascular blood pump of claim 1, wherein the support member is configured to withstand a pressure difference during operation of the intravascular blood pump between the proximal area of the patient's blood vessel and the distal area of the patient's blood vessel from about 7 mmHg to about 30 mmHg.