Rod-shaped body
AssigneeMarvis Medical GmbH
InventorsJoachim Georg Pfeffer, Rolf W. Günther, Thomas Schmitz-Rode
Life of this patent
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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.
Claims16
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.
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.
Dependencies are inferred from the claim text.