# US 11,298,525 B2 · Systems and methods for reducing leaks from a catheter > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,298,525 B2 - Document ID: US11298525B2 - Status: Granted - Kind: B2 - Application number: 16/515,480 - Filed: 2019-07-18 - Published: 2020-01-23 - Granted: 2022-04-12 - Earliest claimed: 2018-07-19 - Assignees: ABIOMED, Inc. - Applicants: Abiomed, Inc. - Inventors: Emilia Jahangir - Web page: https://patentgrep.com/patent/US11298525B2 ## 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 60/205: Non-positive displacement blood pumps - A61M 60/216: including a rotating member acting on the blood, e.g. impeller - A61M 60/422: the force acting on the blood contacting member being electromagnetic, e.g. using canned motor pumps - A61M 60/50: Details relating to control - A61M 60/531: using blood pressure data, e.g. from blood pressure sensors - A61M 60/829: having a purge fluid supply - A61M 60/135: inside a blood vessel, e.g. using grafting - A61M 60/857: Implantable blood tubes - 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 Systems and methods are described herein relating to an intracardiac blood pump system comprising a pump, an elongate multi-lumen catheter, a compartment connected to the catheter, a first lumen, a conduit and a filter disposed within the conduit. At least one electronic element is located within the compartment. The conduit extends through an interface between the compartment and the catheter. The conduit is configured to allow gas to penetrate from a first end of the conduit through the first opening of the compartment to a second end of the conduit. The second end of the conduit is in fluid communication with a central lumen of the elongate multi-lumen catheter. The filter is configured to prevent egress of liquid from the multi-lumen catheter into the compartment after allowing flow of gas from the first end of the conduit through the second end of the conduit and into the multi-lumen catheter. ## Claims ### Claim 1 An intracardiac blood pump system comprising: a pump comprising a housing and a rotor disposed within the housing; an elongate multi-lumen catheter having a proximal end, a distal end and a central lumen, wherein the distal end is adjacent the housing; a compartment comprising a first opening and one or more side ports, the first opening of the compartment connected to the proximal end of the elongate multi-lumen catheter, the one or more side ports of the compartment located proximal of the first opening of the compartment; at least one electronic element within the compartment; a first lumen of the elongate multi-lumen catheter configured to carry liquid from an external source through the one or more side ports of the compartment and through the first opening of the compartment to the distal end of the elongate multi-lumen catheter; a conduit extending through an interface between the compartment and the elongate multi-lumen catheter, the conduit comprising a first end located proximal of the first opening and a second end located distal of the first opening, the conduit configured to carry gas from the first end of the conduit through the first opening of the compartment to the second end of the conduit, the second end of the conduit being in fluid communication with the central lumen of the elongate multi-lumen catheter; and a filter disposed within the conduit, wherein the filter is configured to prevent egress of the liquid from the elongate multi-lumen catheter into the compartment. ### Claim 2 (depends on 1) The intracardiac blood pump system of claim 1, wherein the filter is configured to allow flow of the gas from the first end of the conduit through the second end of the conduit and into the elongate multi-lumen catheter, while preventing egress of the liquid from the elongate multi-lumen catheter into the compartment. ### Claim 3 (depends on 2) The intracardiac blood pump system of claim 2, wherein the first lumen passes through the compartment and wherein the filter is configured to prevent a leak of liquid from the central lumen passing through the conduit and reaching the compartment. ### Claim 4 (depends on 3) The intracardiac blood pump system of claim 3, wherein the filter is located proximal of the first opening of the compartment. ### Claim 5 (depends on 3) The intracardiac blood pump system of claim 3, wherein the filter is located distal of the first opening of the compartment. ### Claim 6 (depends on 3) The intracardiac blood pump system of claim 3, wherein the filter extends across the first opening of the compartment. ### Claim 7 (depends on 6) The intracardiac blood pump system of claim 6, wherein a portion of the filter extends within the compartment. ### Claim 8 (depends on 7) The intracardiac blood pump system of claim 7, wherein the liquid comprises purge fluid and the purge fluid flows through the first lumen to the rotor to provide a barrier against blood ingress into the housing. ### Claim 9 (depends on 1) The intracardiac blood pump system of claim 1, wherein the liquid comprises at least one of: blood, saline, purge fluid, heparin and glucose. ### Claim 10 (depends on 1) The intracardiac blood pump system of claim 1, wherein the filter self-seals when exposed to liquid. ### Claim 11 (depends on 10) The intracardiac blood pump system of claim 10, wherein the filter is gas-permeable prior to liquid exposure. ### Claim 12 (depends on 11) The intracardiac blood pump system of claim 11, wherein the filter comprises a hydrogel adhered to pore walls of a porous substrate. ### Claim 13 (depends on 12) The intracardiac blood pump system of claim 12, wherein the porous substrate comprises at least one of: fibers, granules, or powder. ### Claim 14 (depends on 1) The intracardiac blood pump system of claim 1, wherein the at least one electronic element comprises at least one of: a circuit board, a wire, a soldered or surface mounted electrical connection, a resistor, a capacitor, an inductor, copper electrical connections, a memory, a pressure transducer, and a pressure sensor. ### Claim 15 (depends on 1) The intracardiac blood pump system of claim 1, wherein the gas carried by the conduit is sterilization gas. ### Claim 16 (depends on 1) The intracardiac blood pump system of claim 1, further comprising a connector at the first opening between the compartment and the elongate multi-lumen catheter, wherein the first lumen and the filter pass through the connector. ### Claim 17 (depends on 16) The intracardiac blood pump system of claim 16, wherein the connector has an inner volume and the filter fills at least 50 percent of the inner volume of the connector. ### Claim 18 (depends on 1) The intracardiac blood pump system of claim 1, wherein the filter is sized and shaped to fit within the conduit. ### Claim 19 (depends on 18) The intracardiac blood pump system of claim 18, wherein the filter is shaped as a frustum or a narrow cylinder. ### Claim 20 (depends on 1) The intracardiac blood pump system of claim 1, wherein the first lumen is within the central lumen.