Rod-shaped body

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.

That which is claimed is: 
     
         1 . A rod-shaped body comprising:
 one or more non-metallic filaments; and   a non-ferromagnetic matrix material and a multiplicity of doping particles, wherein the non-ferromagnetic matrix material encloses and/or agglutinates the one or more non-metallic filaments, wherein the multiplicity of doping particles are distributed in the non-ferromagnetic matrix material, and wherein the doping particles generate magnetic resonance tomography artefacts.   
     
     
         2 . The rod-shaped body according to  claim 1 , wherein the rod-shaped body is a rod-shaped body for manufacturing a medical instrument, wherein the medical instrument is a catheter or a guidewire. 
     
     
         3 . The rod-shaped body according to  claim 1 , wherein the one or more non-metallic filaments consist of plastic and/or glass fibre. 
     
     
         4 . The rod-shaped body according to  claim 1 , wherein the non-ferromagnetic matrix material comprises epoxy resin. 
     
     
         5 . The rod-shaped body according to  claim 1  wherein the doping particles are included continuously along the longitudinal axis of the rod-shaped body. 
     
     
         6 . The rod-shaped body according to  claim 1 , wherein the doping particles are included discontinuously along the longitudinal axis of the rod shaped body. 
     
     
         7 . The rod-shaped body according to  claim 1 , wherein the one or more non-metallic filaments are arranged in parallel. 
     
     
         8 . The rod-shaped body according to  claim 1 , wherein the one or more non-metallic filaments are braided with each other, woven, cross-linked, twisted or coiled. 
     
     
         9 . The rod-shaped body according to  claim 1 , wherein a single particle of the multiplicity of doping particles has a mass in the range of micrograms to nanograms and, due to a minimal amount in relation to the non-ferromagnetic matrix material, does not substantially influence outer shape, stability or torquing characteristics of the rod-shaped body. 
     
     
         10 . The rod-shaped body according to  claim 1 , having a diameter in the range of between 0.005 mm and 5 mm or between 0.1 and 1 mm. 
     
     
         11 . A cylindrical composite body consisting of:
 at least one rod-shaped body consisting essentially 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 non-metallic filaments; and 
 a multiplicity of doping particles distributed in the non-ferromagnetic matrix material, wherein the doping particles generate magnetic resonance tomography artefacts; and 
   a non-ferromagnetic shell material, wherein the shell material encloses and/or agglutinates the at least one rod-shaped body.   
     
     
         12 . The cylindrical composite body according to  claim 11  consisting of several rod-shaped bodies having the same diameter or different diameters. 
     
     
         13 . The cylindrical composite body according to  claim 11  consisting of several rod-shaped bodies where a first rod-shaped body of the at least one rod-shaped body is surrounded with at least one secondary rod-shaped body of the at least one rod-shaped body having a smaller diameter. 
     
     
         14 . The cylindrical composite body according to  claim 11 , wherein the at least one secondary rod-shaped body is braided, woven, cross-linked, twisted or coiled around the first rod-shaped body. 
     
     
         15 . The cylindrical composite body according to  claim 11  having an outer surface and wherein the outer surface is covered with a hydrophilic coating. 
     
     
         16 . A tube-shaped composite body consisting of:
 at least one rod-shaped body, consisting essentially 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 non-metallic filaments; and 
 a multiplicity of doping particles distributed in the non-ferromagnetic matrix material, wherein the doping particles generate magnetic resonance tomography artefacts; and 
   a non-ferromagnetic shell material, wherein the shell material encloses and/or agglutinates the at least one rod-shaped body.   
     
     
         17 . The tube-shaped composite body according to  claim 16 , consisting of several rod-shaped bodies that are peripherally embedded in a radial distribution in the rod-shaped composite body. 
     
     
         18 . The tube-shaped composite body according to  claim 16 , wherein the rod-shaped bodies are embedded in a regular radial distribution. 
     
     
         19 . The tube-shaped composite body according to  claim 16 , consisting of several rod-shaped bodies wherein the rod-shaped bodies have the same or different diameters. 
     
     
         20 . The tube-shaped composite body according to  claim 16 , consisting of several rod-shaped bodies wherein the rod-shaped bodies are braided with each other, woven, cross-linked, twisted or coiled.