Perfusion dilatation catheter and method of manufacture
First Claim
1. A dilatation catheter for use in angioplasty comprising an elongated flexible shaft having proximal and distal ends, an inflatable balloon concentrically mounted on the shaft near the distal end thereof, a first lumen extending within the shaft between the proximal end of the shaft and the balloon for inflating and deflating the balloon, a cylindrical segment-shaped cut-away in the flexible shaft extending along essentially the entire interior of the balloon which exposes the first lumen to the interior of the balloon and which provides an elongated surface onto which portion of the deflated balloon can be folded, to thereby provide for a lower profile a second lumen extending within the shaft between the proximal and distal ends thereof, and openings in the side wall of the shaft communicating with the second lumen on the proximal and distal sides of the balloon for carrying blood around the balloon when the balloon is inflated within a patient'"'"'s artery.
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Abstract
Perfusion dilatation catheter and method of manufacturing the same. The catheter has an elongated flexible shaft with an inflatable balloon mounted near the distal end of the shaft. A first lumen in the shaft communicates with the balloon for inflating and deflating the balloon. A second lumen extends between the proximal and distal ends of the shaft and is adapted to receive a guide wire. Openings formed in the side wall of the shaft on the proximal and distal sides of the balloon communicate with the second lumen to provide a path for blood to flow past the balloon when it is inflated.
178 Citations
11 Claims
- 1. A dilatation catheter for use in angioplasty comprising an elongated flexible shaft having proximal and distal ends, an inflatable balloon concentrically mounted on the shaft near the distal end thereof, a first lumen extending within the shaft between the proximal end of the shaft and the balloon for inflating and deflating the balloon, a cylindrical segment-shaped cut-away in the flexible shaft extending along essentially the entire interior of the balloon which exposes the first lumen to the interior of the balloon and which provides an elongated surface onto which portion of the deflated balloon can be folded, to thereby provide for a lower profile a second lumen extending within the shaft between the proximal and distal ends thereof, and openings in the side wall of the shaft communicating with the second lumen on the proximal and distal sides of the balloon for carrying blood around the balloon when the balloon is inflated within a patient'"'"'s artery.
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7. In a method of manufacturing a dilatation catheter for angioplasty use, the steps of:
- forming an elongated flexible shaft with a first lumen which extends between the proximal end and a point near the distal end of the shaft and a second lumen which extends between the proximal and distal ends of the shaft, forming a cylindrical segment-shaped cut-away in the side wall of the shaft near the distal end of the first lumen which forms an elongated surface thereon, mounting an inflatable balloon on the shaft over the cut-away, with the interior of the balloon in fluid communication with the first lumen through the cut-away and the balloon being adapted to be folded onto the elongated surface when deflated, and forming a plurality of openings in the side wall of the shaft in fluid communication with the second lumen on the proximal and distal sides of the balloon to permit blood to flow past the balloon when the balloon is inserted into the vascular system of a patient and inflated.
- View Dependent Claims (8, 9, 10, 11)
Specification