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1. WO1999003426 - CATHETER D'APPLICATION ET PROCEDE D'IMPLANTATION D'UN STENT DANS DES BIFURCATIONS VASCULAIRES, DES RAMIFICATIONS LATERALES, ET DES LESIONS ORIFICIELLES

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

[ EN ]

Claims
1". An improved dilatation catheter having a pliable shaft, a wire channel formed in the shaft, an inflation means for expanding body vessels surrounding the shaft and a guidewire for inserting into the wire channel, the improvement
comprising:
a distal first guidewire exit of the shaft located distal to the inflation means, and
at least one additional proximally located guidewire exit located along a portion of the inflation means.

2. The dilatation catheter of claim 1, further comprising a tubular expandable stent surrounding the inflation means, the stent having a cross-sectional plane of at least one end being non-perpendicular to a longitudinal axis of the tubular stent.

3. The dilatation catheter of claim 2, wherein the angle of the cross-sectional plane of at least one end of the stent to the longitudinal plane of the stent is between 45 and 80 degrees .

4. The dilatation catheter of claim 2, wherein the inflation means is an inflatable balloon.

5. The dilatation catheter of claim 4, wherein the stent is mounted on a portion of the balloon which is distal to the at least one additional proximally located guidewire exit such that an extension of the longitudinal axis of a minimum length of the stent is pointing to the at least one additionally proximally located guidewire exit.

6. The dilatation catheter of claim 4, wherein the at least one additional proximally located guidewire exit along the inflatable balloon is a distal exit of an at least one
positioning guidewire channel, the at least one positioning guidewire channel having a proximal exit through a proximal end of the catheter shaft .

7. The dilatation catheter of claim 4, wherein the at least one additional proximally located guidewire exit along the inflatable balloon is a distal exit of the at least one
positioning guidewire channel, the at least one positioning guidewire channel having a proximal exit through a side-hole formed in a proximal end of an inflatable portion of the balloon.

8. The dilatation catheter of claim 4, wherein the at least one additional proximally located guidewire exit along the inflatable balloon is an intermediately positioned exit along a channel mounted outside the inflatable balloon, a regular guidewire and a positioning guidewire both inserting through the channel for at least a segment of the channel .

9. The dilatation catheter of claim 6, wherein the wire channel is in fluid connection with the at least one additional proximally located guidewire exit along the catheter shaft.

10. The dilatation catheter of claim 7, wherein the wire channel is in fluid connection with the at least one additional proximally located guidewire exit along the inflatable portion of the balloon.

11. The dilatation catheter of claim 2, wherein the tubular stent has at least one oblique end, the oblique end formed by a circumferentially extending ring like band when the stent is in an expanded state, the band having an axis of its cross-sectional plane that is non-perpendicular to the longitudinal axis of the tubular stent.

12. The dilatation catheter of claim 11, wherein the oblique end of the stent is formed by a series of closed loop elements aligned circumferentially to form a tubular segment, wherein at least two such loops have different lengths of their
longitudinal axis.

13. The dilatation catheter of claim 11, wherein the oblique "end of the stent has two ends and is formed by sinusoidally bent wire like material extending circumferentially, the two ends of the sinusoidal bent wire being closed around a cylinder to form a tubular segment, a cross-sectional plane of such tubular segment being non-perpendicular to the longitudinal axis of the stent, and wherein the sinusoidal bent wire is being transformed upon expansion of the tubular segment into an essentially ring like structure, wherein all angles in a circumferential axis of the formerly sinusoidal bent wire are between 135 and 180 degrees.

14. A dilatation catheter of claim 1, further comprising a positioning wire having a distal tip of a pigtail configuration of at least one full 360 degree loop.

15. A dilatation catheter of claim 1, further comprising a positioning wire having a distal tip of a pigtail configuration of almost one full 360 degree loop.

16. A dilatation catheter of claim 1, further comprising a positioning wire having a distal tip segment of super-elastic property and radiopacity.

17. The dilatation catheter of claim 1, wherein the at least one proximally located guidewire exit along the inflatable portion of the balloon is marked by at least one radiopaque marker element on the balloon.

18. The dilatation catheter of claim 1, wherein the at least one proximally located guidewire exit along the inflatable portion of the balloon is marked by at least one radiopaque marker element on the catheter shaft .