Retrieval systems and methods for use thereof

• US 10,172,633 B2
• Filed: 02/08/2016
• Issued: 01/08/2019
• Est. Priority Date: 03/06/2009
• Status: Active Grant

• Current Assignee: Covidien LP (Medtronic Plc)
• Original Assignee: Covidien LP (Medtronic Plc)
• Inventors: Martin, Brian, Levy, David
• Primary Examiner(s): Severson, Ryan J
• Application Number:
  US15/017,695
• Publication Number:
  US 20160228134A1
• Time in Patent Office: 1,065 Days
• CPC Class Codes: A61B 17/00234 for minimally invasive surgery A61B17/0218, A61B17/0469, A61B17/12013, A61B17/1285, A61B17/29, A61B17/320016 take precedence
• 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
• CPC Class Codes: A61B 2017/22084 stone- or thrombus-dissolving
• CPC Class Codes: A61B 2017/22094 for crossing total occlusions, i.e. piercing
• 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: A61B 2017/2217 single wire changing shape to a gripping configuration
• CPC Class Codes: A61F 2/011 Instruments for their placement or removal
• CPC Class Codes: A61F 2002/016 made from wire-like elements
• 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 2230/0093 Umbrella-shaped, e.g. mushroom-shaped
• CPC Class Codes: A61F 2230/0097 Harpoon-shaped
• CPC Class Codes: A61M 2025/0042 Microcatheters, cannula or the like having outside diameters around 1 mm or less
• CPC Class Codes: A61M 2025/0063 having means, e.g. stylets, mandrils, rods or wires to reinforce or adjust temporarily the stiffness, column strength or pushability of catheters which are already inserted into the human body
• CPC Class Codes: A61M 2025/0681 Systems with catheter and outer tubing, e.g. sheath, sleeve or guide tube
• CPC Class Codes: A61M 25/00 : Catheters; Hollow probes dilators A61M29/00; peritoneal catheters A61M1/285; tracheal tubes A61M16/04; for drainage A61M27/00; for uterus, vagina or rectum A61M31/00 ; for measuring or testing A61B; materials for catheters A61L29/00
• CPC Class Codes: A61M 25/01 : Introducing, guiding, advancing, emplacing or holding catheters A61M25/10 takes precedence
• 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

Abstract

The devices and methods described herein relate to improved structures for removing obstructions from body lumens. Such devices have applicability in through-out the body, including clearing of blockages within the vasculature, by recanalizing or removing the obstruction within the body lumen.

Claims

1. A method of recanalizing a blood vessel having an obstruction, the method comprising:

inserting an expandable structure within the obstruction, where the expandable structure comprises a plurality of fluid delivery ports and at least one super elastic element, the superelastic element comprising a super elastic tube, and where the super elastic tube comprises a plurality of holes forming the fluid delivery ports;

expanding the expandable structure within the obstruction; and

delivering a substance through the fluid delivery port such that the substance begins to dissolve the obstruction.

2. The method of claim 1, where the superelastic tube comprises a fluid delivery passage extending through at least a portion of the superelastic tube, where the fluid delivery passage terminates in at least one of the fluid delivery ports.

3. The method of claim 1, where the expandable structure comprises a stent portion and a fluid delivery membrane located within the stent portion, where expanding the expandable structure comprises expanding the stent portion and where delivering the substance comprises delivering the substance through at least one delivery port located in the fluid delivery membrane.

4. The method of claim 1, where the expandable structure comprises a braided structure comprising at least one wire element.

5. A method of recanalizing a blood vessel having an obstruction, the method comprising:

inserting an expandable structure within the obstruction, where the expandable structure comprises at least one fluid delivery port, and where the expandable structure comprises at least two helical coils forming an expandable double helix structure, where at least one of the helical coils comprises the at least one fluid delivery port,

expanding the expandable structure within the obstruction; and

delivering a substance through the at least one fluid delivery port such that the substance begins to dissolve the obstruction.

6. A method of recanalizing a blood vessel having an obstruction, the method comprising:

inserting an expandable structure within the obstruction, where the expandable structure comprises a plurality of fluid delivery ports and a super elastic element, and where the super elastic element comprises a super elastic wire, and where the super elastic wire comprises a polymeric layer comprising a fluid passage having a plurality of openings in the polymeric layer to form the fluid delivery ports;

expanding the expandable structure within the obstruction; and

delivering a substance through the fluid delivery ports such that the substance begins to dissolve the obstruction.