Catheter, in particular for insertion of heart-pacemaker-or ICD-electrodes into a patient'body
A catheter, in particular for insertion of heart-pacemaker- or ICD-electrodes into a patient's body, comprises a catheter wall and a reinforcement therein for stabilization of the catheter. The reinforcement is a profile element which is adjusted to the desired mechanical properties of the catheter in the axial and peripheral direction thereof.
1. A catheter, in particular for insertion of heart-pacemaker- or ICD-electrodes into a patient's body, comprising
a catheter wall, which defines at least one lumen, said catheter wall having a longitudinal dimension and said lumen extending in the direction of the longitudinal dimension; and
a reinforcement in an axial and peripheral direction in the catheter wall for stabilization of the catheter in torsional and/or buckling strength;
wherein the reinforcement is a profile element which is adjusted to desired mechanical properties of the catheter in the axial and peripheral direction thereof,
wherein, at least along one sectional length, the profile element is a lattice profile element, and
wherein the lattice profile element comprises: peripheral ribs in a form of partial rings that extend transversely to the longitudinal dimension, each peripheral rib having two opposed ends; and two axially continuous axial ribs that extend in the direction of the longitudinal dimension and that are each connected to a respective end of each of said peripheral ribs, said axial ribs being spaced apart in a direction transverse to the longitudinal dimension such that a gap is left between the two axial ribs, serving in the catheter as a pre-determined breaking point for the catheter to be torn open and the inserted electrode to be removed.
2. A catheter according to claim 1 , wherein the profile element has properties of torsional, bending and buckling strength and of compressibility and/or ability of splitting which are adjusted by variable profile patterns on varying sectional lengths.
3. A catheter according to claim 1 , wherein, with a view to the properties of the catheter of torsional, bending and buckling strength and of compressibility and/or ability of slitting, the cross section of at least one of the axial and peripheral ribs is variable in at least one of the axial and peripheral direction.
4. A catheter according to claim 1 , wherein the profile element is made from a piece of hose or film of metal or plastic material by cutting or etching.
5. A catheter according to claim 1 , wherein the ribs of the profile element are produced by radiation-induced or chemical cross-linkage of one of a curable piece of plastic hose and of a curable coating.
6. A catheter according to claim 1 , wherein the profile element is produced by a process of thermal molding, in particular by injection-molding or extrusion.
7. A catheter according claim 1 , wherein the profile element is embedded, in particular by injection, in the catheter wall.
8. A catheter according to claim 1 , wherein the profile element is embedded between an internal hose and an external hose of the catheter wall.
9. A catheter according to claim 1 , wherein the profile element is made of one of: a hose; a tube; and a flat material that is patterned and then rolled up and wound.
10. A catheter according to claim 1 , wherein the gap extends in the direction of the longitudinal dimension of said catheter wall.