Scoring balloon with translating scoring wires
A device for introduction into a body vessel includes a shaft, a balloon positioned at the distal end of the shaft, a guidewire disposed longitudinally within the shaft to receive a guidewire during use, a balloon disposed at the distal end of the shaft, and longitudinal scoring wires to score a vascular lesion attached to the distal end of the shaft. The scoring wires are disposed over the balloon and disposed within the shaft. The proximal ends are welded or otherwise affixed to a spring mounted in the handle. The balloon expands when fluid is delivered to the balloon through the inflation lumen. This expansion pushes the scoring wires against the vascular lesion. The scoring wires attach to a source of vibrations. The scoring wires are made of a helical coil.
1. A scoring balloon catheter comprising:
a shaft having a distal region and a lumen;
an inflatable balloon mounted on the distal region;
a handle assembly at least partially comprising a hub mounted in the shaft proximally of the balloon, on the proximal-most half of the shaft, or on the proximal end of the shaft wherein at least a proximal section of the hub is in a fixed longitudinal position with respect to the shaft;
a scoring wire mounted to the shaft distally of the distal end of the balloon and extending proximally past the proximal end of the balloon, wherein the scoring wire has a proximal end terminating at and disposed within the hub; and
a vibrating means connected to the scoring wire via a transmission member for vibrating the scoring wire, wherein the transmission member includes a distal end disposed within the handle assembly.
2. The catheter of claim 1 wherein the vibrating means is selected from motors, micro motors, solenoids, and piezoelectrics.
3. The catheter of claim 1 , wherein the transmission member has a driven end and transmitting end, said transmitting end corresponding to the distal end of the transmission member, wherein the transmitting end contacts the hub or the proximal end of the scoring wire.
4. The catheter of claim 3 wherein the transmission member extends through the wall of the shaft.
5. The catheter of claim 4 wherein the transmission member extends distally into a proximal end of the catheter.
6. The catheter of claim 5 wherein the vibrating means imparts longitudinal motion to the scoring wire.
7. The catheter of claim 5 wherein the vibrating means imparts axial motion to the scoring wire.
8. The catheter of claim 1 wherein the vibrating means is disposed completely inside the catheter.