Shock wave balloon catheter with insertable electrodes
First Claim
1. An apparatus, comprising:
- an elongate member having a distal end and a proximal end and including a central lumen for receiving a guide wire;
a balloon attached to the distal end of the elongate member;
a cylindrical member carrying a plurality of electrodes said member being, slidable along and over a length of the elongate member from an initial position outside the balloon to a destination position wherein the electrodes are positioned inside the balloon.
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Accused Products
Abstract
A translatable shock wave treatment apparatus is suitable for use in treating calcified lesions in vascular structures having small diameters. An elongate member carrying a collapsed angioplasty balloon is first inserted into the occluded blood vessel. The angioplasty balloon is inflated with a conducting fluid to pre-dilate the narrow blood vessel prior to introducing electrodes and applying shock wave therapy. After the blood vessel is at least partially opened, a translatable electrode carrier equipped with one or more shock wave emitters is advanced into the angioplasty balloon. Shock waves are then propagated through the fluid to impart energy to calcified plaques along the vessel walls, thereby softening the calcified lesions. Following the shock wave treatment, multiple inflation and deflation cycles of the angioplasty balloon can be administered to gently compress the softened lesion and complete dilation of the blood vessel.
202 Citations
23 Claims
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1. An apparatus, comprising:
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an elongate member having a distal end and a proximal end and including a central lumen for receiving a guide wire; a balloon attached to the distal end of the elongate member; a cylindrical member carrying a plurality of electrodes said member being, slidable along and over a length of the elongate member from an initial position outside the balloon to a destination position wherein the electrodes are positioned inside the balloon. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method, comprising:
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providing a balloon attached to a distal end of an elongate member; providing an electrode carrier slidably mounted on the elongate member at a position outside of, and proximal to, the balloon, the electrode carrier including an emitter attached thereto; advancing the balloon into a portion of a vascular structure to be treated; partially inflating the balloon with a fluid; translating the electrode carrier along the elongate member to a position at least partially inside the balloon; and initiating a shock wave in the fluid by energizing the emitter. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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21. A device for use in an angioplasty procedure, the device comprising:
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an elongate member having a distal end and a proximal end, the elongate member extending linearly along a central axis; a balloon attached to the distal end of the elongate member; an inflation pump attached to the proximal end of the elongate member, the inflation pump in fluid communication with the balloon; an electrode carrier translatable along the elongate member from the proximal end of the elongate member outside the balloon to a position within the balloon; a plurality of electrodes attached to the electrode carrier; and a high voltage pulse generator electrically coupled to the electrodes, the high voltage pulse generator causing the electrodes to arc and propagate a shock wave within the balloon. - View Dependent Claims (22, 23)
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Specification