Apparatus for restenosis treatment

a technology of apparatus and restenosis, applied in the field of angiop1asty, can solve the problems of subcutaneous narrowing of the artery, not significantly etc., and achieve the effect of reducing the rate of occurrence of restenosis and preventing the rapid growth of such cells

Inactive Publication Date: 2006-07-04
CALMEDICA
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0006]The purpose of the invention is to provide method and apparatus to significantly reduce restenosis rates of occurrence following an angioplasty procedure. To accomplish this purpose, there is provided method and apparatus for exposing the dilated lesion to a radiation dose that will affect smooth muscle cell growth. There is provided a catheter which has at its distal end a radioactive source, the source being maneuverable to the site of a lesion which has been dilated or removed, the apparatus allowing the site to be exposed to the radiation dose that will affect smooth muscle cells such that the rapid growth of such cells can be prevented, thereby controlling restenosis.

Problems solved by technology

A major problem encountered in a significant number of patients treated by this procedure is the subsequent narrowing of the artery after the expansion treatment.
However, recent data seems to indicate that the prior art methods described above do not significantly reduce restenosis rates of occurrence.

Method used

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  • Apparatus for restenosis treatment
  • Apparatus for restenosis treatment
  • Apparatus for restenosis treatment

Examples

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Embodiment Construction

[0023]With continued reference to the drawing, FIG. 1 illustrates the apparatus and method for preventing restenosis of an artery that has been enlarged by angioplasty or other procedure. Specifically, apparatus, shown generally at 10, is positioned within artery segment 12 having lesion site 14 which has previously been enlarged by angioplasty or other procedure such that atherosclerotic plaque 16 has been radially compressed by expansion of the balloon portion of an angioplasty device (not shown) or removed by other means. Device 10 having distal end 18 with tip 20 and wire wound housing 22 is positioned such that housing 22 is positioned within the lesion site 14. Housing 22 contains radioactive dose means 30 and is provided with window cut-out 32. Device 10 includes a wire wound retractable sheath 24 and catheter shaft 26 with guide wire and guide wire port 28. A radioactive dose means 30 is moveable by advancing or retracting catheter shaft 26 which may be referred to as a posi...

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Abstract

Method and apparatus for treatment and post-treatment of the stenosed region of an artery after reduction of the region by angioplasty or other means by applying a radioactive dose to said reduced region of the artery by positioning a radioactive dose to the reduced region is disclosed.

Description

[0001]This application is a continuation of application Ser. No. 07 / 755,480, filed Sep. 5, 1991, now U.S. Pat. No. 5,302,168.BACKGROUND OF THE INVENTION[0002]This invention relates generally to angiop1asty and more particularly to a method and apparatus for preventing restenosis after angioplasty or other stenosis treatment.BACKGROUND DESCRIPTION[0003]In the past, catheters have been developed which may be effectively inserted into blood vessels and maneuvered through a vascular tree. A balloon may be used with such catheters to expand in the vessel and open blockages found therein. In a typical percutaneous transluminal coronary angioplasty (PTCA) or percutaneous transluminal angioplasty (PTA) procedure, a guiding catheter is percutaneously introduced into the vascular system of a patient through an artery and advanced therein until the distal tip of the guiding catheter is appropriately positioned. A dilation catheter having a balloon on the distal end thereof and a guide wire are...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): A61N5/00A61B17/22A61M36/04A61N5/10
CPCA61N5/1002A61B2017/22068A61M2025/1047A61N2005/1004
Inventor HESS, ROBERT L.
Owner CALMEDICA
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