# US 2025/0205451 A1 · Cochlear implantable catheter and cell delivery device thereof > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2025/0205451 A1 - Document ID: US20250205451A1 - Status: Published application - Kind: A1 - Application number: 18/950,273 - Filed: 2024-11-18 - Published: 2025-06-26 - Earliest claimed: 2023-12-20 - Assignees: National Defense Medical Center - Applicants: National Defense Medical Center - Inventors: Chih-Hung Wang - Web page: https://patentgrep.com/patent/US20250205451A1 ## CPC - A61F 11/00: Methods or devices for treatment of the ears or hearing sense (implantable prostheses that substitute or replace internal ear parts, e.g. ear-drums, A61F2/18; methods or devices to cause a change in the state of auditory consciousness A61M21/00; electrotherapy applying electrical stimulation of the auditory system, or circuits therefor A61N1/36; radiotherapy using optical stimulation of the auditory system A61N5/06; electro-acoustic hearing aids H04R25/00); Non-electric hearing aids; Methods or devices for enabling ear patients to achieve auditory perception through physiological senses other than hearing sense; Protective devices for the ears, carried on the body or in the hand (headwear, e.g. caps or helmets, with means for protecting the ears A42B1/0188, A42B3/16) - A61M 25/0067: {characterised by the distal end, e.g. tips (A61M25/0054, A61M25/04 take precedence; balloon catheters A61M25/10)} - A61P 27/16: Otologicals - 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) - 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)} - A61P: SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS ## Abstract A cochlear implantable catheter and a cell delivery device thereof are provided. The cochlear implantable catheter includes an implantable catheter body, and a proximal end and a leading tip are defined at two opposite ends of the implantable catheter body. A central lumen is formed at a center of the implantable catheter body. An outer surface of the implantable catheter body has at least one guide groove that extends in a longitudinal direction of the implantable catheter body and a plurality of lateral through holes that penetrate from the outer surface of the implantable catheter body to the central lumen. The implantable catheter body is configured to penetrate into a cochlea of an inner ear of a patient, and is bendable along cochlear turns of the patient, such that cells or medications can enter the cochlea of the patient through the central lumen and the lateral through holes. ## Claims ### Claim 1 A cochlear implantable catheter, which is configured to deliver cells or medications to a cochlea of a patient, comprising: an implantable catheter body, wherein the implantable catheter body is flexible, and a proximal end and a leading tip are defined at two opposite ends of the implantable catheter body in a longitudinal direction; wherein a portion of the implantable catheter body that is implanted into the cochlea of the patient is defined as an implant section, the implantable catheter body has a connection end that is disposed at one side of the implant section toward the proximal end, a central lumen that penetrates from a center of the proximal end to the leading tip is formed inside the implantable catheter body, and the implant section has at least one guide groove formed on an outer surface thereof and a plurality of lateral through holes that penetrate from the outer surface of the implant section to the central lumen; wherein the implantable catheter body is configured to penetrate into the cochlea of the patient by orienting the leading tip toward the cochlea of the patient, and is capable of bending and moving forward along a spiral structure of the cochlea of the patient, so as to enter between a basal turn and an apical turn of the cochlea of the patient; wherein the cells or the medications are capable of being guided into the central lumen from the proximal end and entering the cochlea through the central lumen and the plurality of lateral through holes; wherein the at least one guide groove is a spiral groove formed on the outer surface of the implant section of the implantable catheter body along a spiral path that extends in the longitudinal direction of the implantable catheter body, or is a groove formed along a central axial path of the implantable catheter body and extending in the longitudinal direction of the implantable catheter body, such that the implantable catheter body is bendable when penetrating into the cochlea of the patient, and a flow-guiding effect is generated to reduce lymphatic extravasation of the cochlea. ### Claim 2 (depends on 1) The cochlear implantable catheter according to claim 1, wherein a length of the implant section of the implantable catheter body is configured to range between 8 mm and 30 mm, and a diameter of the implant section ranges between 0.3 mm and 1.0 mm. ### Claim 3 (depends on 2) The cochlear implantable catheter according to claim 2, wherein a diameter of the central lumen is configured to range between 300 μm and 500 μm, and a diameter of the plurality of lateral through holes is configured to range between 50 μm and 300 μm. ### Claim 4 (depends on 2) The cochlear implantable catheter according to claim 2, wherein a diameter of the central lumen is configured to range between 100 μm and 200 μm, and a diameter of the plurality of lateral through holes is configured to range between 10 μm and 50 μm. ### Claim 5 (depends on 2) The cochlear implantable catheter according to claim 2, wherein a protruding ring is disposed at a junction of the connection end and the implant section of the implantable catheter body, and a diameter of the protruding ring is greater than the diameter of the implant section of the implantable catheter body and a diameter of the connection end of the implantable catheter body. ### Claim 6 (depends on 1) The cochlear implantable catheter according to claim 1, wherein the at least one guide groove is limited to being the spiral groove, and a helix angle of the at least one guide groove is configured to range between 15 degrees and 60 degrees. ### Claim 7 (depends on 1) The cochlear implantable catheter according to claim 1, wherein the at least one guide groove is limited to being a linear groove; wherein, when a quantity of the at least one guide groove is plural, the guide grooves are arranged to be equiangularly spaced apart on an outer side of the implantable catheter body. ### Claim 8 (depends on 1) The cochlear implantable catheter according to claim 1, wherein a groove depth of the at least one guide groove is configured to range between 10 μm and 200 μm. ### Claim 9 A cell delivery device, which is configured to deliver cells or medications to a cochlea of a patient, comprising: a cochlear implantable catheter, wherein the cochlear implantable catheter includes an implantable catheter body, the implantable catheter body is flexible, and a proximal end and a leading tip are defined at two opposite ends of the implantable catheter body in a longitudinal direction; wherein a portion of the implantable catheter body that is implanted into the cochlea of the patient is defined as an implant section, the implantable catheter body has a connection end that is disposed at one side of the implant section toward the proximal end, a central lumen that penetrates from a center of the proximal end to the leading tip is formed inside the implantable catheter body, and the implant section has at least one guide groove formed on an outer surface thereof and a plurality of lateral through holes that penetrate from the outer surface of the implant section to the central lumen; wherein the implantable catheter body is configured to penetrate into the cochlea of the patient by orienting the leading tip toward the cochlea of the patient, and is capable of bending and moving forward along a spiral structure of the cochlea of the patient, so as to enter between a basal turn and an apical turn of the cochlea of the patient; wherein the cells or the medications are capable of being guided into the central lumen from the proximal end and entering the cochlea through the central lumen and the plurality of lateral through holes; wherein the at least one guide groove is a spiral groove formed on the outer surface of the implant section of the implantable catheter body along a spiral path that extends in the longitudinal direction of the implantable catheter body, or is a groove formed along a central axial path of the implantable catheter body and extending in the longitudinal direction of the implantable catheter body, such that the implantable catheter body is bendable when penetrating into the cochlea of the patient, and a flow-guiding effect is generated to reduce lymphatic extravasation of the cochlea; and a delivery module connected to the cochlear implantable catheter, wherein the delivery module includes a pressure generator and a connection tube connected to an outlet of the pressure generator; wherein a fluid that contains the cells or the medications is stored in the pressure generator, and the pressure generator drives and outputs the fluid that contains the cells or the medications from the outlet to the connection tube; wherein one end of the connection tube that is away from the pressure generator is connected to the proximal end of the implantable catheter body, such that the cells or the medications are capable of entering the central lumen of the implantable catheter body and entering the cochlea of the patient through the central lumen and the plurality of lateral through holes. ### Claim 10 (depends on 9) The cell delivery device according to claim 9, wherein the delivery module is configured to be capable of delivering the fluid having a delivery viscosity of between 2 Pa·s and 5 Pa·s through the cochlear implantable catheter at a flow rate of between 0.1 sccm and 0.5 sccm, and a pressure of the fluid ranges between 1,000 MPa and 1,500 MPa. ### Claim 11 (depends on 9) The cell delivery device according to claim 9, wherein a length of the implant section of the implantable catheter body is configured to range between 8 mm and 30 mm, and a diameter of the implant section ranges between 0.3 mm and 1.0 mm. ### Claim 12 (depends on 11) The cell delivery device according to claim 11, wherein a diameter of the central lumen is configured to range between 300 μm and 500 μm, and a diameter of the plurality of lateral through holes is configured to range between 50 μm and 300 μm. ### Claim 13 (depends on 11) The cell delivery device according to claim 11, wherein a diameter of the central lumen is configured to range between 100 μm and 200 μm, and a diameter of the plurality of lateral through holes is configured to range between 10 μm and 50 μm. ### Claim 14 (depends on 11) The cell delivery device according to claim 11, wherein a protruding ring is disposed at a junction of the connection end and the implant section of the implantable catheter body, and a diameter of the protruding ring is greater than the diameter of the implant section of the implantable catheter body and a diameter of the connection end of the implantable catheter body. ### Claim 15 (depends on 9) The cell delivery device according to claim 9, wherein the at least one guide groove is limited to being the spiral groove, and a helix angle of the at least one guide groove is configured to range between 15 degrees and 60 degrees. ### Claim 16 (depends on 9) The cell delivery device according to claim 9, wherein the at least one guide groove is limited to being a linear groove; wherein, when a quantity of the at least one guide groove is plural, the guide grooves are arranged to be equiangularly spaced apart on an outer side of the implantable catheter body. ### Claim 17 (depends on 9) The cell delivery device according to claim 9, wherein a groove depth of the at least one guide groove is configured to range between 10 μm and 200 μm.