Devices and methods for vascular recanalization

• US 9,211,396 B2
• Filed: 02/23/2011
• Issued: 12/15/2015
• Est. Priority Date: 02/23/2010
• Status: Active Grant

• Current Assignee: Covidien LP (Medtronic Plc)
• Original Assignee: Covidien LP (Medtronic Plc)
• Inventors: Aboytes, Maria
• Primary Examiner(s): Erezo, Darwin
• Assistant Examiner(s): TON, MARTIN TRUYEN
• Application Number:
  US13/033,100
• Publication Number:
  US 20110213403A1
• Time in Patent Office: 1,756 Days
• Field of Search: 606/191, 606/194, 606/200, 604/104
• US Class Current: 1/1
• CPC Class Codes: A61B 17/22 Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for dilators A61M29/00
• CPC Class Codes: A61B 17/221 Gripping devices in the form of loops or baskets for gripping calculi or similar types of obstructions surgical snare instruments A61B17/32056
• CPC Class Codes: A61B 2017/00778 Operations on blood vessels A61B2017/22097, A61B2017/320741 take precedence
• CPC Class Codes: A61B 2017/00867 shape memory effect for prostheses A61F2210/0014
• CPC Class Codes: A61B 2017/22038 with a guide wire
• CPC Class Codes: A61B 2017/22054 with two balloons
• CPC Class Codes: A61B 2017/22055 with three or more balloons
• CPC Class Codes: A61B 2017/2212 having a closed distal end, e.g. a loop
• CPC Class Codes: A61B 2017/2215 having an open distal end
• CPC Class Codes: A61F 2/013 Distal protection devices, i.e. devices placed distally in combination with another endovascular procedure, e.g. angioplasty or stenting
• CPC Class Codes: A61F 2002/018 made from tubes or sheets of material, e.g. by etching or laser-cutting
• CPC Class Codes: A61F 2230/0006 circular
• CPC Class Codes: A61F 2230/0067 conical
• CPC Class Codes: A61F 2230/0069 cylindrical
• CPC Class Codes: A61F 2230/0076 ellipsoidal or ovoid
• CPC Class Codes: A61F 2230/008 paraboloidal
• CPC Class Codes: A61M 2025/0004 having two or more concentrically arranged tubes for forming a concentric catheter system
• CPC Class Codes: A61M 2025/0681 Systems with catheter and outer tubing, e.g. sheath, sleeve or guide tube
• CPC Class Codes: A61M 2025/109 having balloons for removing solid matters, e.g. by grasping or scraping plaque, thrombus or other matters that obstruct the flow
• CPC Class Codes: A61M 25/0074 Dynamic characteristics of the catheter tip, e.g. openable, closable, expandable or deformable
• CPC Class Codes: A61M 25/10 : Balloon catheters A61M25/0125 takes precedence; embolectomy A61B17/22032; retractors A61B17/02; inflatable balloons for placing stents or stent-grafts A61F2/958 ; stomach balloons for treatment of obesity A61F5/0003; oesophagal tubes A61J15/00
• CPC Class Codes: A61M 29/02 : Dilators made of swellable material balloon catheters for angioplasty A61M25/104

Abstract

In some embodiments, a medical device for recanalizing a vessel having a blockage and restoring blood flow through an obstructed blood vessel includes an expandable member coupled to a core wire and a hypotube that are movable relative to each other to manipulate the expandable member between various configurations. The expandable member having a capture structure in an expanded configuration. The expandable member can include multiple interstices formed by woven mesh filaments or braided strands through which the material blocking the vessel can pass. The capture structure can include a shape on its external surface that facilitates dislodgement and capture of the material within capture spaces created by the expandable member. Some embodiments include a capture sack or cap for capturing material and preventing material from migrating down stream of the blockage. Superoxygenated blood can be infused distal to the blockage to minimize loss of function during an ischemic event.

Claims

1. An apparatus, comprising:

an elongate member; and

a self-expanding braided expandable member defining a plurality of openings and coupled to the elongate member, the self-expanding braided expandable member configured to move from a collapsed configuration to an expanded configuration when unconstrained;

the self-expanding braided expandable member configured to be inserted into a blood vessel in the collapsed configuration and move to the expanded configuration when unconstrained within the blood vessel,

the self-expanding braided expandable member when in the expanded configuration defining an interior volume and configured to receive therein at least a portion of a bodily tissue,

the self-expanding braided expandable member being movable from the expanded configuration to a helical configuration while disposed within the blood vessel such that only the expandable member has the helical configuration and a capture region is defined between at least a first portion of the self-expanding braided expandable member and a second portion of the self-expanding braided expandable member wherein the self-expanding braided expandable member is moved to the helical configuration by rotating the elongate member.

2. The apparatus of claim 1, wherein the first portion of the expandable member is configured to contact a wall of the blood vessel in the expanded configuration.

3. The apparatus of claim 1, wherein the first portion of the expandable member and at least a portion of the second portion of the expandable member move from the collapsed configuration to the expanded configuration simultaneously.

4. The apparatus of claim 1, wherein the elongate member is substantially linear when the self-expanding braided expandable member is in the collapsed configuration, the expanded configuration and the helical configuration.