# US 9,038,639 B2 · Rod-shaped body > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,038,639 B2 - Document ID: US9038639B2 - Status: Granted - Kind: B2 - Application number: 11/993,658 - Filed: 2006-06-26 - Published: 2010-03-11 - Granted: 2015-05-26 - Earliest claimed: 2005-06-28 - Assignees: Marvis Medical GmbH - Applicants: Joachim Georg Pfeffer; Rolf W. Günther; Thomas Schmitz-Rode - Inventors: Joachim Georg Pfeffer; Rolf W. Günther; Thomas Schmitz-Rode - Web page: https://patentgrep.com/patent/US9038639B2 ## CPC - A61M 25/09: Guide wires - A61L 29/126: {having a macromolecular matrix} - A61L 29/18: Materials at least partially X-ray or laser opaque - A61L 31/026: {Ceramic or ceramic-like structures, e.g. glasses} - A61L 31/048: {obtained by reactions only involving carbon-to-carbon unsaturated bonds (A61L31/041 takes precedence)} - A61L 31/125: {having a macromolecular matrix} - A61L 31/18: Materials at least partially X-ray or laser opaque - A61M 2025/09133: {having specific material compositions or coatings; Materials with specific mechanical behaviours, e.g. stiffness, strength to transmit torque} - 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)} - A61L: METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES (preservation of bodies or disinfecting characterised by the agents employed A01N; preserving, e.g. sterilising, food or foodstuffs A23; preparations for medical, dental or toiletry purposes A61K) ## Abstract The invention relates to a rod-shaped body (1) comprised of one or more filaments (2) and of a non-ferromagnetic matrix material (3). The matrix material (3) surrounds the filament(s) (1) and/or adheres them to one another. The rod-shaped body is also comprised of a dopant consisting of particles that generate magnetic resonance tomographic artifacts that is introduced into the matrix material (3). Rod-shaped bodies of this type can be used to construct guide wires, catheters and other instruments to be used in minimally invasive surgical interventions. ## Claims ### Claim 1 A cylindrical composite body comprising a multiplicity of rod-shaped bodies used for manufacturing a magnetic resonance tomography (MRT)-compatible medical instrument, wherein each of the rod-shaped bodies is comprised of one or more non-metallic filaments, a non-ferromagnetic matrix material, wherein the non-ferromagnetic matrix material encloses and/or agglutinates the one or more filaments and maintains the diameter of the rod-shaped bodies before and after placement in a subject and during removal, and doping particles included in the non-ferromagnetic matrix material, wherein the doping particles generate magnetic resonance tomography (MRT) artefacts thereby forming a doped matrix material and wherein each of the doping particles has a mass in the range of micrograms to nanograms, wherein the multiplicity of rod-shaped bodies have the same diameters or different diameters or a first rod-shaped body of the multiplicity of rod-shaped bodies is surrounded by several secondary rod-shaped bodies of smaller diameters, and wherein the multiplicity of rod-shaped bodies is surrounded by a non-doped matrix material. ### Claim 2 (depends on 1) The cylindrical composite body according to claim 1, wherein the one or more filaments consist of plastic and/or glass fibre. ### Claim 3 (depends on 1) The cylindrical composite body according to claim 1, wherein the non-ferromagnetic matrix material consists of epoxy resin. ### Claim 4 (depends on 1) The cylindrical composite body according to claim 1 wherein each of the rod-shaped bodies is continuously doped with the doping particles along its longitudinal axis, wherein the doping particles generate magnetic resonance tomography artefacts. ### Claim 5 (depends on 1) The cylindrical composite body according to claim 1, wherein each of the rod-shaped bodies is discontinuously doped with the doping particles along its longitudinal axis, wherein the doping particles generate magnetic resonance tomography artefacts. ### Claim 6 (depends on 1) The cylindrical composite body according to claim 1, wherein the one or more filaments are arranged in parallel. ### Claim 7 (depends on 1) The cylindrical composite body according to claim 1 wherein the filaments are arranged braided with each other, woven, cross-linked, twisted or coiled. ### Claim 8 (depends on 1) The cylindrical composite body according to claim 1, wherein the doping particles generate magnetic resonance tomography artefacts that render each of the rod-shaped bodies visible in a MRT image and do not interfere with identifying of body structure in a testing vicinity. ### Claim 9 (depends on 1) The cylindrical composite body according to claim 1, wherein each of the rod-shaped bodies has a diameter in the range of between 0.005 mm and 5 mm or between 0.1 mm and 1 mm. ### Claim 10 (depends on 1) The cylindrical composite body according to claim 1, wherein the multiplicity of rod-shaped bodies are arranged braided with each other, woven, cross-linked, twisted or coiled. ### Claim 11 (depends on 1) The cylindrical composite body according to claim 1 wherein the multiplicity of rod-shaped bodies possess different magnetic resonance tomography properties. ### Claim 12 (depends on 1) The cylindrical composite body according to claim 1 wherein the non-doped matrix material is a hydrophilic coating. ### Claim 13 A catheter comprising a multiplicity of rod-shaped bodies, wherein each of the rod-shaped bodies is comprised of one or more non-metallic filaments, a non-ferromagnetic matrix material, wherein the non-ferromagnetic matrix material encloses and/or agglutinates the one or more filaments and maintains the diameter of the rod-shaped bodies before and after placement in a subject and during removal, and doping particles included in the non-ferromagnetic matrix material, wherein the doping particles generate magnetic resonance tomography MRT) artefacts thereby forming a doped matrix material and wherein each of the doping particles has a mass in the range of micrograms to nanograms, wherein the multiplicity of rod-shaped bodies have the same diameters or different diameters and wherein the multiplicity of rod-shaped bodies are peripherally embedded in a radial distribution of the catheter or embedded in a homogeneous distribution of the catheter and wherein each of the multiplicity of rod-shaped bodies is surrounded by a non-doped matrix material. ### Claim 14 (depends on 13) The catheter according to claim 13, wherein the rod-shaped bodies are arranged braided with each other, woven, cross-linked, twisted or coiled. ### Claim 15 (depends on 13) The catheter according to claim 13, wherein the rod-shaped bodies possess different magnetic resonance tomography properties. ### Claim 16 (depends on 13) The catheter according to claim 13, wherein the non-doped matrix material is a hydrophilic coating.