Atherectomy with subintimal space

Patent metadata

Field	Value
Publication number	US-10159509-B2
Application number	US-201715453206-A
Country	US
Kind code	B2
Filing date	Mar 8, 2017
Priority date	Mar 8, 2017
Publication date	Dec 25, 2018
Grant date	Dec 25, 2018

Abstract

A method and dissecting device are disclosed for treating a stenotic vessel. The method including inserting a directional guide member of a dissecting device into a subintimal space of a blood vessel, the dissecting device including the directional guide member and a cutting member located proximally to a distal end of the directional guide member; and cutting a stenotic region within the blood vessel with the cutting member while advancing the distal end of the directional guide member through the subintimal space.

First claim

What is claimed is:

1. A method for treating a stenotic vessel, the method comprising:
inserting a directional guide member of a dissecting device into a subintimal space of a blood vessel, the dissecting device including the directional guide member and a cutting member located proximally to a distal end of the directional guide member;
cutting a stenotic region within the blood vessel with the cutting member while advancing the distal end of the directional guide member through the subintimal space; and
wherein the directional guide member does not extend through an outer surface of the subintimal space.

2. The method of claim 1 , wherein the cutting of the stenotic region further comprises:
cutting media or intima between the directional guide member and the cutting member, wherein the cutting member has a tubular cutting member.

3. The method of claim 1 , comprising:
placing a portion of the cutting member in the subintimal space.

4. The method of claim 1 , comprising:
limiting a rotation of the cutting member within the blood vessel with the directional guide member.

5. The method of claim 1 , comprising:
dilating the subintimal space with the directional guide member after inserting the directional guide member into the subintimal space; and
cutting the subintimal space where dilated by the directional guide member.

6. The method of claim 1 , comprising:
repeating at least once, an entry of either the directional guide member or the cutting member into a true lumen of the blood vessel.

7. The method of claim 1 , comprising:
guiding the dissecting device into the subintimal space on a guide wire, the guide wire extending through at least a portion of the directional guide member and exiting the directional guide member on the distal end of the directional guide member.

Assignees

• Terumo Corp

Inventors

• Nishio Kousuke
• Tada Yuuichi

Classifications

• A61B17/320708 Primary

  Curettes, e.g. hollow scraping instruments · CPC title

• A61B2017/22042

  Details of the tip of the guide wire · CPC title

• A61B2017/320741

  for stripping the intima or the internal plaque from a blood vessel, e.g. for endarterectomy · CPC title

• A61B17/320758

  with a rotating cutting instrument, e.g. motor driven (A61B17/320725, A61B17/32075 and A61B17/320783 take precedence; for removing intra-ocular material A61F9/00763; endoscopic rotatable cutting instruments A61B17/32002) · CPC title

• A61B17/22

  Implements for squeezing-off ulcers or the like on inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; for invasive removal or destruction of calculus using mechanical vibrations; for removing obstructions in blood vessels, not otherwise provided for · CPC title