Steerable dilatation catheter
AssigneeAdvanced Cardiovascular Systems, Inc.
InventorWilfred J. Samson
Life of this patent
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Abstract
Low profile dilation catheter and method of manufacturing the same for use in percutaneous transluminal coronary angioplasty. The catheter has an inflatable balloon for dilating stenotic lesions, and an integral guide wire by which the catheter can be steered into the artery system.
Claims24
In a dilatation catheter, an elongate flexible plastic tubular member having proximal and distal ends and an axially extending flow passage extending therethrough, an inflatable balloon of flexible plastic carried by the tubular member and disposed near the distal end of the tubular member and having its interior in communication with the flow passage, a continuous guide wire extending through the flow passage, the balloon and the distal end of the tubular member, and means bonding the distal end of the tubular member directly to the guide wire to form a bond so that the guide wire is secured to the distal extremity of the tubular member.
In a catheter for dilating a lesion in the cardiovascular system, an elongate flexible plastic tubular member having proximal and distal ends and an axially extending flow passage, an inflatable balloon of flexible plastic carried by the tubular member adjacent the distal end of the tubular member and having its interior in fluid communication with the flow passage in the tubular member, a metal guide wire having a shaft which extends through the flow passage in the tubular member and into the interior of the balloon, means directly bonding the distal end of the tubular member to the guide wire, means connected to the proximal end of the guide wire for rotating the same to steer the catheter into the cardiovascular system, and means connected to the proximal end of the tubular member for introducing a pressurized fluid into the flow passage to inflate the balloon.
A steerable, low-profile dilatation catheter comprising:
- an elongate flexible tubular member having a fluid flow passage extending therethrough;
- an inflatable balloon disposed near the distal end of the tubular member and having its interior in communication with the fluid flow passage;
- a guide element fixed within the dilatation catheter having a tapered section which extends through the interior of the balloon and projects out the distal end thereof;
- a helical coil disposed about the outwardly projecting portion of the tapered section;
- means to bond the helical coil to the outwardly projecting portion of the tapered section;
- and
- means to seal the distal end of the balloon.
A dilatation catheter comprising:
- (a) a first tubular member having an inner lumen extending therethrough;
- (b) an inflatable balloon disposed near the distal end of the tubular member having its interior in fluid communication with the inner lumen of the tubular member;
- (c) a second tubular member having an inner lumen extending therethrough which extends through the interior of the balloon and having at least one opening therein distally of the balloon with the distal end of the balloon sealed about the second tubular member to prevent the loss of inflation liquid from the interior of the balloon;
- and
- (d) means to vent air from within the interior of the balloon through the inner lumen of the second tubular member.
A guide wire adapted to be positioned within an inner lumen of a balloon dilatation catheter comprising:
- (a) an elongated hollow wire element having an inner lumen extending along the interior thereof and having an opening at or near the distal end in fluid communication with the lumen which facilitates pressure detection of the fluids on the exterior of the guide wire;
- (b) means disposed on the proximal extremity of the elongated hollow wire element to torque the wire element;
- and
- (c) a flexible coil member disposed about the distal portion of the hollow wire member providing access for fluid on the exterior thereof to an opening at or near the distal end of the hollow wire element.
Dependencies are inferred from the claim text.