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Abrasive nose cone with expandable cutting and sanding region for rotational atherectomy device

A device, rotating shaft technology, applied in the field of scalable abrasive and cutting heads, can solve the problem of not disclosed distal cones coated with abrasive layers, etc.

Inactive Publication Date: 2011-05-11
CARDIOVASCULAR SYST INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0020]However, these cited patents do not disclose an abrasive coated distal nose cone, the proximal portion of which is expandable

Method used

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  • Abrasive nose cone with expandable cutting and sanding region for rotational atherectomy device
  • Abrasive nose cone with expandable cutting and sanding region for rotational atherectomy device
  • Abrasive nose cone with expandable cutting and sanding region for rotational atherectomy device

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Embodiment Construction

[0028] The invention discloses a rotary atherectomy device, wherein a grinding cone head is connected with a rotatable driving shaft. The grinding head includes a distal tapered section and a plurality of elongated flexible parts adjacent to it, such as wires, the proximal ends of these parts are connected with the proximal mount, and The distal ends of these components are connected to a distal mount. The proximal and distal brackets and the distal tip are rotationally articulated and articulated for rotation with the drive shaft. The proximal stent and the distal stent are axially separated from each other. As the axial spacing is reduced, the flexible member flexes outwards when driven by an actuator device, such as an actuator cable or equivalent cable movably placed within the lumen of the drive shaft and connected to the distal tip. Proximal force applied to the drive device causes the distal tip to move proximally, resulting in flexing of the flexible member to the ex...

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Abstract

An rotational atherectomy apparatus for abrading tissue, comprising: a flexible, elongated, rotatable drive shaft having a proximal end and a distal end opposite the proximal end; a nose cone operatively attached proximate the distal end of the drive shaft comprising a distal tapered section and a plurality of elongate, flexible members adjacent to the distal tapered section of the drive shaft, each member in the plurality being fixed at both a proximal end and a distal end opposite the proximal end; a proximal mount rotatable with the drive shaft and fixedly connected to the proximal ends ofall the flexible members in the plurality; and a distal mount axially separated from the proximal mount and fixedly connected to the distal ends of all the flexible members in the plurality. When theaxial separation of the proximal and distal mounts is reduced by pulling the distal tapered section proximally, each member in the plurality bows outward from the drive shaft and expands radially in an at least partially elliptical profile.

Description

[0001] Cross References to Related Applications [0002] This application claims priority from provisional application 61 / 059028, filed June 5, 2008, entitled "CUTTING AND SANDING RIBBON WISK," the contents of which are incorporated herein by reference. technical field [0003] The present invention relates to expandable grinding and cutting heads for rotational atherectomy devices. Background technique [0004] Atherectomy is a non-surgical procedure used to open blocked coronary arteries or vein grafts, using a device at the end of a catheter to cut or scrape Atherosclerotic plaque (a buildup of fatty deposits and other buildup on the inside and outside of arterial walls). For ease of description, the word "abrading" is used to describe the grinding and / or scraping behavior of such grinding heads. [0005] Atherosclerotic atherectomy is used to restore the flow of oxygen-rich blood to the heart, thereby relieving chest pain and preventing heart disease. The procedure is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B17/32
CPCA61B17/32002A61B17/320725A61B17/320758A61B18/1492A61B2018/00214
Inventor J·里弗斯R·威利M·肯布鲁尼D·C·弗朗奇诺K·J·卡尔森S·莱瑟姆
Owner CARDIOVASCULAR SYST INC
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