Method of making a catheter balloon by laser fusing wrapped material
a technology of laser fusion and catheter, which is applied in the field of medical devices, can solve the problems of tube further processing, vessel wall trauma, etc., and achieve the effects of reducing melting point, reducing strength, and improving rigidity
Inactive Publication Date: 2005-10-13
SRIDHARAN SRINIVASAN +1
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- Description
- Claims
- Application Information
AI Technical Summary
Benefits of technology
This approach results in a balloon with a decreased wall thickness and improved profile, facilitating easier processing and enhanced performance characteristics, including increased tensile strength and reduced manufacturing time.
Problems solved by technology
Substantial, uncontrolled expansion of the balloon against the vessel wall can cause trauma to the vessel wall.
One difficulty has been further processing of the tube by stretching the tube, after the layers of wrapped material are fused together.
Method used
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Embodiment Construction
[0020]FIG. 1 illustrates an over-the-wire type stent delivery balloon catheter 10 embodying features of the invention. Catheter 10 generally comprises an elongated catheter shaft 12 having an outer tubular member 14 and an inner tubular member 16. Inner tubular member 16 defines a guidewire lumen 18 configured to slidingly receive a guidewire 20, as best illustrated in FIG. 2 illustrating a transverse cross section view of the distal end of the catheter shown in FIG. 1, taken along line 2-2. The coaxial relationship between outer tubular member 14 and inner tubular member 16 defines annular inflation lumen 22. An inflatable balloon 24 disposed on a distal section of catheter shaft 12 has a proximal skirt section 25 sealingly secured to the distal end of outer tubular member 14 and a distal skirt section 26 sealingly secured to the distal end of inner tubular member 16, so that its interior is in fluid communication with inflation lumen 22. An adapter 30 at the proximal end of cathet...
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Abstract
A method of making a catheter balloon or other expandable medical device, and a balloon or other device formed thereby, in which at least a portion of a tubular, wrapped sheet of polymeric material is heated with laser radiation to form a fused seam extending along at least a section of the length of the tubular body. In one embodiment, the portion of the sheet heated by laser radiation is less than the entire area of the sheet, so that the fused seam is formed by heating portions of the sheet without heating sections of the sheet spaced apart from the fused seam. In one embodiment, the sheet of polymeric material comprises a polymer having a porous and preferably a node and fibril microstructure, which in one embodiment is selected from the group consisting of expanded polytetrafluoroethylene (ePTFE) and expanded ultra high molecular weight polyethylene.
Description
BACKGROUND OF THE INVENTION [0001] This invention generally relates to medical devices, and particularly to intracorporeal devices for therapeutic or diagnostic uses such as balloon catheters, and vascular grafts. [0002] In percutaneous transluminal coronary angioplasty (PTCA) procedures, a guiding catheter is advanced until the distal tip of the guiding catheter is seated in the ostium of a desired coronary artery. A guidewire, positioned within an inner lumen of a dilatation catheter, 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. Then the 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 flui...
Claims
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IPC IPC(8): B29C53/42B29C53/58B29C53/60B29C65/16
CPCB29C53/42Y10T428/1334B29C53/60B29C66/1122B29C66/1142B29C66/4322B29C66/49B29K2027/18B29L2022/022B29L2023/00B29L2031/7542B29C66/4329B29C65/1658B29C65/1629B29C65/1635B29C66/836B29C53/581B29C66/71B29C66/727B29C66/73711B29C66/73776B29C66/73921B29K2079/08B29K2077/00B29K2075/00B29K2027/06B29K2023/12B29K2023/0683B29K2023/06
Inventor SRIDHARAN, SRINIVASANSVENSSON, BJORN G.
Owner SRIDHARAN SRINIVASAN