Dilation catheter
OwnerJaroslav Janacekinventor
Life of this patent
Estimating the term…
Abstract
A dilation catheter for use in performing angioplasty procedures. The catheter includes a relatively long catheter shaft which has two lumens. A relatively short guidewire receiving tube is thermally bonded to the distal end of the shaft, with its lumen approximately aligned with one of the lumens of the catheter shaft and a stiffening wire positioned therein. A dilation balloon, preformed with a shape that enables it to be used in an offset configuration, is thermally bonded to the distal and proximal ends of the tube, with its lumen aligned with the remaining lumen of the catheter shaft. The balloon and tube together define channels for the perfusion of blood past the balloon, which channels remain open even when the balloon bears against the tube during the inflation thereof.
Claims19
A catheter comprising:
- a catheter shaft having a distal end, a proximal end and an inflation lumen;
- a guidewire tube defining a guidewire lumen configured to receive a guidewire and having a proximal end and a distal end, the guidewire tube extending forwardly of the distal end of the catheter shaft and defining an exit port for receiving a guidewire;
- and
- an inflatable dilation balloon in communication with the inflation lumen of the catheter shaft and including proximal and distal ends, the balloon being attached to the guidewire tube in substantially side-by-side relationship;
- wherein the balloon is shaped such that the balloon contacts the guidewire tube when the balloon is inflated within a patient, but bows away from the guidewire tube when the balloon is inflated outside of a patient.
A catheter comprising:
- a catheter shaft defining an inflation lumen;
- a guidewire lumen having a proximal end and a distal end, the proximal end including a port for receiving a guidewire;
- a balloon including a proximal end, a distal end and an inflatable portion, the inflatable portion of the balloon being in fluid communication with the inflation lumen of said catheter shaft;
- and
- a stiffening wire disposed in the catheter shaft, the stiffening wire having proximal and distal ends;
- the distal end of the stiffening wire terminating at the port in the guidewire lumen with said stiffening wire being substantially parallel to the guidewire lumen, such that when a guidewire is inserted through said port and into the guidewire lumen the stiffening wire and the guidewire combine to stiffen the catheter over substantially the entire length thereof.
Dependencies are inferred from the claim text.