Balloon ctheter having external guidewire
a technology of guidewires and balloons, which is applied in the field of intravascular catheters, can solve the problems of balloons having a lubricious coating thereon that cannot be positioned, and achieve the effect of improving balloon retention
Inactive Publication Date: 2008-02-14
ABBOTT CARDIOVASCULAR
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- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Benefits of technology
The invention is a catheter with an inflation balloon and a guidewire that can be inflated and maintained in a specific location in a patient's blood vessel to perform a medical procedure. The catheter has an elongated shaft with a guidewire lumen and an inflation lumen, and a distal section with a balloon. The guidewire can be slidably received through an intermediate port and a distal intermediate port, and the balloon can be inflated using the guidewire. The balloon catheter has improved balloon retention and reduced risk of guidewire tangling during use. The catheter can be a rapid exchange type or an over-the-wire type. The shaft has a support member to prevent the balloon from bowing or bunching during inflation. The support member can be a mandrel or rod that extends through the balloon interior or is provided in the shaft lumen. The catheter can be used for various medical procedures such as angioplasty, stent delivery, and drug delivery.
Problems solved by technology
However, one difficulty has been the tendency of the balloon having a lubricious coating thereon to slip out of position during inflation of the balloon.
Method used
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Embodiment Construction
[0020]FIG. 1 illustrates a rapid exchange type balloon catheter 10, generally comprising a shaft 11 with an inflation lumen 12, a guidewire lumen 13 in a distal shaft section configured to slidingly receive a guidewire 15, and a balloon 14 on the distal shaft section. An adapter 16 at the proximal end of catheter shaft 11 is configured to direct inflation fluid into inflation lumen 12. FIG. 1 illustrates the balloon 14 prior to complete inflation within the patient's body lumen 27. In use, the distal end of catheter 10 is advanced to a desired region of the patient's body lumen 27 in a conventional manner either over a previously positioned guidewire, or with guidewire 15 already in the catheter 10. The balloon 14 is inflated to perform a procedure, which in a preferred embodiment comprises dilating a stenosed region of the body lumen, or a previously stented body lumen that is restenosed (commonly referred to as in-stent-restenosis), and the balloon deflated for repositioning or re...
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A catheter having an elongated shaft with an inflation lumen and a guidewire lumen, a balloon on a distal shaft section, and a proximal intermediate port proximal to the balloon and a distal intermediate port distal to the balloon, the intermediate ports being in communication with the guidewire lumen and being configured to slidably receive a guidewire therethrough so that the guidewire extends into or out of a proximal section of the guidewire lumen through the proximal intermediate port, extends along an outer surface of the balloon, and extends into or out of a distal section of the guidewire lumen through the distal intermediate port. The balloon is inflated in a patient's blood vessel to perform a medical procedure, with the section of the guidewire extending along an outer surface of the balloon providing improved balloon retention at the desired location in the blood vessel during inflation of the balloon.
Description
BACKGROUND OF THE INVENTION [0001] This invention generally relates to catheters, and particularly intravascular catheters for use in percutaneous transluminal coronary angioplasty (PTCA) or for the delivery of stents. [0002] In percutaneous transluminal coronary angioplasty (PTCA) procedures a guiding catheter is advanced in the patient's vasculature until the distal tip of the guiding catheter is seated in the ostium of a desired coronary artery. A guidewire is first advanced out of the distal end of the guiding catheter into the patient's coronary artery until the distal end of the guidewire crosses a lesion to be dilated. A dilatation catheter, having an inflatable balloon on the distal portion thereof, is advanced into the patient's coronary anatomy over the previously introduced guidewire until the balloon of the dilatation catheter is properly positioned across the lesion. Once properly positioned, the dilatation balloon is inflated with inflation fluid one or more times to a...
Claims
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IPC IPC(8): A61M25/10A61M25/00A61F2/958A61M29/02
CPCA61M25/0029A61M25/003A61M25/104A61M2025/1056A61M2025/0034A61M2025/0037A61M2025/0039A61M2025/0004
Inventor MCMURTRY, CHRISTOPHERLEE, JEONG S.WANTINK, KENNETH L.
Owner ABBOTT CARDIOVASCULAR