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Catheter having a multilayered shaft section with a reinforcing mandrel

a multi-layered, reinforcing mandrel technology, applied in the field of catheters, can solve the problems that the support mandrel does not always transmit axial force effectively, prior art designs have suffered from various drawbacks, etc., and achieve excellent pushability, trackability, and manufacturability.

Inactive Publication Date: 2005-04-28
DUCHAMP JACKY G
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

"The invention is a catheter with a reinforced shaft that provides improved pushability, flexibility, trackability, and kink resistance. The shaft has a proximal shaft section and a distal shaft section, with a mandrel in between. The mandrel is made of a metal or high strength material and tapers distally to a smaller outer dimension. The catheter is flexible and pushable, with excellent trackability and kink resistance, allowing for easy advancement over a guidewire and maneuvering within the patient's tortuous anatomy. The invention is advantageous for balloon catheters and rapid exchange catheters."

Problems solved by technology

Despite these attempts, prior art designs have suffered from various drawbacks.
For example, support mandrels do not always transmit axial force effectively.

Method used

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  • Catheter having a multilayered shaft section with a reinforcing mandrel
  • Catheter having a multilayered shaft section with a reinforcing mandrel
  • Catheter having a multilayered shaft section with a reinforcing mandrel

Examples

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Embodiment Construction

[0019]FIG. 1 illustrates an over-the-wire balloon catheter 10 embodying features of the invention. Catheter 10 generally comprises an elongated catheter shaft 11 having a proximal end, a distal end, a proximal shaft section 12, a distal shaft section 13, an outer tubular member 14, and an inner tubular member 15. Inner tubular member 15 defines a guidewire lumen 16 adapted to slidingly receive a guidewire 17. The coaxial relationship between outer tubular member 14 and inner tubular member 15 defines annular inflation lumen 18, as best shown in FIGS. 2-4, illustrating transverse cross sections of the catheter of FIG. 1, taken along lines 2-2, 3-3 and 4-4, respectively. An inflatable balloon 19 is disposed on the distal shaft section 13, having a proximal skirt section sealingly secured to the distal end of outer tubular member 14, and a distal skirt section sealingly secured to the distal end of inner tubular member 15, so that its interior is in fluid communication with inflation l...

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Abstract

A catheter having an elongated shaft having at least a section which is multilayered with a first layer and a second layer secured to the first layer, and a mandrel having at least a section between the first and second layers. In one presently preferred embodiment, the mandrel is in contact with an outer surface of the first layer and with an inner surface of the second layer.

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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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): A61F2/958A61M25/00
CPCA61M25/005A61M25/0053Y10T428/13A61M2025/0063A61M2025/1086A61M25/10
Inventor DUCHAMP, JACKY G.
Owner DUCHAMP JACKY G
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