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Improved atherectomy device

一种斑块切除、斑块的技术，应用在手术、手术切割器械、医药科学等方向，能够解决空心轴未提供内管部和外管部匀速旋转、需要时间等问题

Active Publication Date: 2017-05-10
TARYAG MEDICAL
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] 2. Although the transmission at the proximal end allows relative linear movement and simultaneous rotation of the inner and outer tubes, no structure is provided at the distal end of the hollow shaft to ensure the alignment of the inner and outer tubes. Uniform rotation
This takes time, especially if the atheroma is not completely removed and further manipulation with an atherectomy catheter is required

Method used

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Examples

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Embodiment Construction

[0045] The atherectomy device of the present invention comprises a motor driven flexible hollow shaft slidable along a guide wire. The distal ends of prior art atherectomy devices used to remove occlusions from blood vessels have large, uniform diameters that tend to slip towards the vessel wall when in contact with hardened plaque, often resulting in perforation of the vessel wall, whereas The rotatable atherectomy device of the present invention has a variable diameter distal end that gradually increases from a small diameter suitable for piercing hardened plaque to an enlarged diameter suitable for enlarging the perforation.

[0046] The unique configuration of the atherectomy device facilitates opening guidewire impenetrable chronic total occlusions (CTOs), although it is also suitable for cutting and removing other occlusions. Prior art atherectomy devices are not capable of reliably opening CTOs that develop severely sclerotic plaques resulting from chronic occlusion. P...

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PUM

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Abstract

An atherectomy device comprising a rotatabry motor- driven flexible hollow shaft that is coaxial with a longitudinal axis of the guidewire; an annular distal end of the hollow shaft having a diameter that is only slightly larger than the diameter of the guidewire and configured with cutting surfaces for piercing hardened atherosclerotic plaque! a tubular sleeve secured to a first peripheral surface of the hollow shaft and configured with cutting surfaces for enlarging an opening formed in the plaque; and an asymmetric cutting unit extending between the sleeve and a second peripheral surface of the hollow shaft, to enable eccentric rotation of the hollow shaft for cutting and removing additional occlusive material from the blood vessel to open a chronic total occlusion. In one embodiment, the cutting unit is a helical strand unit having a polygonal cross section with a first side that atraumatically contacts a blood vessel wall.

Description

technical field [0001] The present invention relates to the field of rotational atherectomy devices for the removal of accumulated plaque and thrombus on the walls of blood vessels. More specifically, the present invention relates to an atherectomy device capable of opening long term total occlusions. Background technique [0002] Several rotational atherectomy devices are known in the prior art for the removal of accumulated plaque and thrombus from blood vessel walls. The softer, cholesterol-rich atheroma material often hardens into calcified atherosclerotic plaques that restrict blood flow. [0003] There are several ways to create a tunnel through a blocked blood vessel. Initially, a guide wire was used to probe a passage through the vascular blockage in order to reach the unobstructed portion of the vessel downstream. After the guidewire passes through the blockage, the physician manually guides the catheter through the introducer sheath and over the guidewire to the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B17/32A61B17/22
CPCA61B2017/320733A61B17/320758A61B2017/22068A61B2017/22082A61B2017/22094A61B17/320725
Inventor 斯维·巴拉克阿哈龙·科恩
Owner TARYAG MEDICAL
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