# US 10,307,525 B2 · Contrast agent removing device and contrast agent removing method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,307,525 B2 - Document ID: US10307525B2 - Status: Granted - Kind: B2 - Application number: 15/134,194 - Filed: 2016-04-20 - Published: 2016-10-27 - Granted: 2019-06-04 - Earliest claimed: 2015-04-22 - Assignees: Terumo Kabushiki Kaisha - Applicants: Terumo Kabushiki Kaisha - Inventors: Katsuhiko Shimizu; Keiko Yamashita; Hiroki Hosono; Yasukazu Sakamoto - Web page: https://patentgrep.com/patent/US10307525B2 ## CPC - A61M 1/3615: {Cleaning blood contaminated by local chemotherapy of a body part temporarily isolated from the blood circuit} - A61M 25/00: Catheters; Hollow probes (dilators A61M29/00; {peritoneal catheters A61M1/285; tracheal tubes A61M16/04; for drainage A61M27/00; for uterus, vagina or rectum A61M31/00} ; for measuring or testing A61B; {materials for catheters A61L29/00}) - A61M 1/84: {Drainage tubes; Aspiration tips (for negative pressure wound therapy A61M1/90; for surgical cutting instruments A61B17/32)} - A61M 2202/0468: non-physiological - 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 contrast agent removing device configured to remove a contrast agent from blood vessels includes: an elongated outer tube 40; an inner tube 20 arranged in an interior of the outer tube 40; an expandable portion 30 interlocked with a distal portion of the inner tube 20 and configured to be capable of being stored within the outer tube 40 and to expand radially outward in a funnel shape opening in a distal direction by projecting from the outer tube in the distal direction; and a fixing portion 80 provided at the rim of the expandable portion 30 and configured to be capable of being fixed to a contact object. ## Claims ### Claim 1 A contrast agent removing device for removing a contrast agent from a blood vessel, comprising: an elongated outer tube; an inner shaft arranged in an interior of the outer tube; an expandable portion interlocked with a distal portion of the inner shaft and configured to be capable of being stored in the interior of the outer tube and to expand radially outward into a funnel shape opening in a distal direction by projecting in the distal direction from the outer tube, wherein the inner shaft includes a storage portion, which corresponds to a space extending from the distal portion surrounded by the expandable portion in a proximal direction; an adsorbent arranged within the storage portion and configured to be capable of adsorbing the contrast agent; and a fixing portion provided at a rim of the expandable portion and configured to be capable of being fixed to a contact object. ### Claim 2 (depends on 1) The contrast agent removing device according to claim 1, wherein the fixing portion includes an adsorption portion opening in the distal direction and configured to apply a negative pressure to a portion of the contact object within the rim of the expandable portion. ### Claim 3 (depends on 2) The contrast agent removing device according to claim 2, wherein the fixing portion includes a projecting portion projecting in the distal direction. ### Claim 4 (depends on 3) The contrast agent removing device according to claim 3, wherein the inner shaft includes a draining lumen extending from the distal portion surrounded by the expandable portion to a proximal portion, and a through hole formed on a proximal side with respect to the expandable portion and penetrating from the draining lumen to an outer surface. ### Claim 5 (depends on 2) The contrast agent removing device according to claim 2, wherein the inner shaft includes a draining lumen extending from the distal portion surrounded by the expandable portion to a proximal portion, and a through hole formed on a proximal side with respect to the expandable portion and penetrating from the draining lumen to an outer surface. ### Claim 6 (depends on 2) The contrast agent removing device according to claim 2, wherein the inner shaft includes a through hole formed on the proximal side with respect to the expandable portion and penetrating from the expandable portion to an outer surface. ### Claim 7 (depends on 1) The contrast agent removing device according to claim 1, wherein the fixing portion includes a projecting portion projecting in the distal direction. ### Claim 8 (depends on 1) The contrast agent removing device according to claim 1, wherein the inner shaft includes a draining lumen extending from the distal portion surrounded by the expandable portion to a proximal portion, and a through hole formed on a proximal side with respect to the expandable portion and penetrating from the draining lumen to an outer surface. ### Claim 9 (depends on 1) The contrast agent removing device according to claim 1, wherein the inner shaft includes a through hole formed on the proximal side with respect to the expandable portion and penetrating from the expandable portion to an outer surface. ### Claim 10 A contrast agent removing device for removing a contrast agent from a blood vessel, comprising: an elongated outer tube; an inner shaft arranged in an interior of the outer tube; an expandable portion interlocked with a distal portion of the inner shaft and configured to be capable of being stored in the interior of the outer tube and to expand radially outward into a funnel shape opening in a distal direction by projecting in the distal direction from the outer tube, wherein the expandable portion includes an adsorbent which allows circulation of liquid from a distal surface side to a proximal surface side in an expanded state of the expandable portion, and wherein the adsorbent is capable of adsorbing the contrast agent; and a fixing portion provided at a rim of the expandable portion and configured to be capable of being fixed to a contact object. ### Claim 11 (depends on 10) The contrast agent removing device according to claim 10, wherein the expandable portion includes a filter which allows circulation of liquid therethrough. ### Claim 12 (depends on 11) The contrast agent removing device according to claim 11, wherein the adsorbent is arranged in an interior of the filter. ### Claim 13 (depends on 12) The contrast agent removing device according to claim 12, wherein the fixing portion includes a projecting portion projecting in the distal direction.