Abstract Guiding catheter for angioplasty, substantially consisting of a hollow tube (1)(lumen) of flexible torsion-stiff material, onto an end (3) of which connects a tubular extension of flexible material, which is curved according to predetermined varying radii of curvature, and the free end portion (4) of which is provided with a softer material than the flexible material, wherein the end portion (4) of softer material is provided with at least three radially protruding elements (9), preferably having an arc-like outer curvature seen in tangential direction. A very great stability of the end portion (4) of softer material is herewith achieved at the transition between the aorta (A) and the blood vessel (B), e.g. the ostium irrespective of the great speed of the blood flow and reactive forces due to the introduction of the balloon catheter or any other catheter.
Catheter for angioplasty, substantially consisting of a hollow tube (lumen) of flexible torsion-stiff material, onto one end of which connects a tubular extension of flexible material which is curved according to predetermined varying radii of curvature, and the free end portion of which is provided with a softer material than the flexible material, characterized in that said end portion of softer material is provided with at least three radially protruding elements.
Claim 2
Dependent Claim
20 words
Catheter as claimed in claim 1, characterized in that the or each radially protruding element is given a ridge-like form.
Claim 3
Dependent Claim
21 words
Catheter as claimed in claim 2, characterized in that said ridge-like element has an arc-like outer curvature seen in tangential direction.
Claim 4
Dependent Claim
29 words
Catheter as claimed in claim 1 or 3, characterized in that each protruding element ends at a distance from the end opening of the end portion of the catheter.
Claim 5
Dependent Claim
29 words
Catheter as claimed in any of the preceding claims, characterized in that the inner side of the end portion is supported by a narrowed portion of the tubular extension.
Claim 6
Dependent Claim
28 words
Catheter as claimed in claim 5, characterized in that the extension is provided in each case with a passage opening at the location of the radially protruding elements.
Claim 7
Dependent Claim
37 words
Catheter as claimed in any of the preceding claims, characterized in that an annular element observable by X-rays is embedded in the end portion, preferably between the outflow opening and the end of the radially protruding element.