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Catheter balloons with integrated non-distensible seals

a catheter and seal technology, applied in the field of balloon catheters, can solve the problems of catheters not being able to deliver balloons with large diameter expansion capability, placing problems during procedures,

Inactive Publication Date: 2008-05-29
WL GORE & ASSOC INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides catheter balloons with a non-distending region that can shape the balloon or seal it to the catheter during inflation. The non-distending region has multiple layers that wind around the balloon material at a high angle and overlap at an opposing angle of between 45 and 135 degrees to the longitudinal axis. The angle of the wrap can vary depending on the desired attributes of the finished balloon. The invention allows for improved control and flexibility during inflation of the balloon.

Problems solved by technology

It is also common to have the length of the balloon change during inflation causing placement problems during procedures.
Additionally, catheters have been unable to deliver balloons with large diameter expansion capability due to the need for a low profile and sustained pressures.

Method used

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  • Catheter balloons with integrated non-distensible seals
  • Catheter balloons with integrated non-distensible seals
  • Catheter balloons with integrated non-distensible seals

Examples

Experimental program
Comparison scheme
Effect test

example 1

Composite Film

[0033]The ePTFE membrane used to make the composite film was made in accordance with the teaching in U.S. Pat. No. 5,476,589 to Bacino. Specifically, the ePTFE membrane was longitudinally expanded to a ratio of 55 to 1 and transversely expanded approximately 2.25 to 1, to produce a thin strong membrane with a mass of approximately 3.5 g / m2 and a thickness of approximately 6.5 micrometers.

[0034]The composite film was made by using a wire-wound rod coating process whereby a solution of Tecothane TT-1085A polyurethane (Thermedics, Inc, Woburn, Mass.) and tetrahydrofuran (THF) was coated onto an ePTFE membrane. A 3% to 8% by weight solution of Tecothane TT-1085A polyurethane in THF was coated onto the ePTFE membrane to produce a composite film with approximately equal amounts of Tecothane TT-1085A polyurethane as depicted in FIG. 1 on either side and throughout the ePTFE membrane and a total polymer weight application of approximately 40% to 60% of the total final composit...

example 2

Non-Distensible

[0035]The composite film was slit to 5 mm wide and wrapped around a 30.5 cm long core wire (Putnam Plastics LLC, Dayville, Conn.) at a 4 to 5 degree angle from the longitudinal axis of the wire. The core wire was a 0.2 mm diameter silver plated copper wire with a fluoroethylene-propylene (FEP) 5100 coating that resulted in a final wire diameter of with a 0.394 mm. The core wire was then wrapped with the composite film in the opposite direction at a 4 to 5 degree angle from the longitudinal axis of the wire.

[0036]The first balloon material layer was then over-wrapped with a non-distensible layer of composite film slit to 10 mm wide to form the non-distensible regions. The 10 mm wide second wrap layer of composite film was wrapped around the first balloon material layer in two locations, approximately 50 mm apart. The 10 mm wide composite film was wrapped around the first balloon material five times at an angle of approximately 90 degrees from the longitudinal axis, or ...

example 3

Shaped Non-Distensible

[0041]The composite film was slit to 5 mm wide and wrapped around a 30.5 cm long core wire (Putnam Plastics LLC, Dayville, Conn.) at a 4 to 5 degree angle from the longitudinal axis of the wire. The core wire was a 0.2 mm diameter silver plated copper wire with a fluoroethylene-propylene (FEP) 5100 coating that resulted in a final wire diameter of with a 0.394 mm. The core wire was then wrapped with the composite film in the opposite direction at a 4 to 5 degree angle from the longitudinal axis of the wire.

[0042]The first balloon material layer was then over-wrapped with a non-distensible layer of composite film slit to 10 mm wide to form the non-distensible regions. The 10 mm wide second wrap layer of composite film was wrapped around the first balloon material layer in three locations, approximately 50 mm apart. The 10 mm wide composite film was wrapped around the first balloon material five times at an angle of approximately 90 degrees from the longitudinal ...

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PUM

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Abstract

A catheter balloon with integral non-distending regions having a plurality of layers which wind around the balloon material and overlap to form an angle of between 45 and 90 degrees relative to each other upon inflation, and methods of making the non-distending regions are provided.

Description

BACKGROUND OF THE INVENTION[0001]The present invention relates to balloon catheters and, more particularly, to a non-shortening wrapped balloon configured to expand with essential radial symmetry to a predetermined diameter upon application of a predetermined pressure thereto.[0002]Balloon catheters are well known in the art. Such catheters are employed in a variety of medical procedures, including dilation of narrowed blood vessels, placement of stents and other implants, temporary occlusion of blood vessels, and other vascular uses.[0003]In a typical application, the balloon is advanced to the desired location in the vascular system. The balloon is then pressure-expanded in accordance with a medical procedure. Thereafter, the pressure is removed from the balloon, allowing the balloon to contract and permit removal of the catheter. It is to be appreciated that the balloon is usually formed of an elastomeric material which is readily pressure-expanded, yet will also readily contract...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): A61M25/10A61F2/958
CPCA61M25/1002A61M25/1011A61M25/1029A61M2025/1004A61M25/0009A61M2025/1059A61M2025/1075A61M2025/1084A61M2025/1031
Inventor ALPINI, ALFRED A.CAMPBELL, CAREY V.ESKAROS, SHERIFKING, DAVID R.KORLESKI, JOESPH E.MANN, JAMES WILLIAMMCLAUGHLIN, LONZO CNEWCOMB, KENNETHROEBER, PETER J.
Owner WL GORE & ASSOC INC