Systems and methods for removing obstructive matter from body lumens and treating vascular defects

• US 10,722,255 B2
• Filed: 06/22/2015
• Issued: 07/28/2020
• Est. Priority Date: 12/23/2008
• Status: Active Grant

• Current Assignee: Covidien LP (Medtronic Plc)
• Original Assignee: Covidien LP (Medtronic Plc)
• Inventors: Lenker, Jay, Strauss, Brian, Shimada, Lynn
• Primary Examiner(s): David, Shaun L
• Application Number:
  US14/745,572
• Publication Number:
  US 20150359549A1
• Time in Patent Office: 1,863 Days
• CPC Class Codes: A61B 17/12118 for positioning in conjunction with a stent
• CPC Class Codes: A61B 17/1214 Coils or wires
• CPC Class Codes: A61B 17/12186 liquid materials adapted to be injected
• 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 17/320725 with radially expandable cutting or abrading elements A61B17/32075 takes precedence
• CPC Class Codes: A61B 17/3439 with means for changing the inner diameter of the cannula, e.g. expandable A61B17/3423, A61B17/3431 take precedence; catheters A61M25/0662
• CPC Class Codes: A61B 2017/00867 shape memory effect
• CPC Class Codes: A61B 2017/12054 Details concerning the detachment of the occluding device from the introduction device
• CPC Class Codes: A61B 2017/22001 Angioplasty, e.g. PCTA
• CPC Class Codes: A61B 2017/22041 outside the catheter
• CPC Class Codes: A61B 2017/22042 Details of the tip of the guide wire
• CPC Class Codes: A61B 2017/22044 with a pointed tip
• 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 2217/005 with suction drainage system
• CPC Class Codes: A61B 5/6858 with a distal basket, e.g. expandable basket
• CPC Class Codes: A61M 2025/0024 Expandable catheters or sheaths
• CPC Class Codes: A61M 25/0021 characterised by the form of the tubing A61M25/0054 takes precedence
• CPC Class Codes: A61M 25/0023 by the form of the lumen, e.g. cross-section, variable diameter
• CPC Class Codes: A61M 25/0026 : Multi-lumen catheters with stationary elements catheter assemblies comprising a catheter in combination with a guide tube, sheath or sleeve A61M2025/0681; catheters comprising telescoping coaxial elements A61M2025/0175
• CPC Class Codes: A61M 25/0043 : characterised by structural features
• CPC Class Codes: A61M 25/0074 : Dynamic characteristics of the catheter tip, e.g. openable, closable, expandable or deformable
• CPC Class Codes: A61M 27/002 : Implant devices for drainage of body fluids from one part of the body to another intraocular A61F9/00781; middle ear A61F11/202

Abstract

A catheter system can be used to remove obstructions, deliver implantable devices or substances, and/or restore flow through body lumens. The system can include an outer shaft having a lumen, sidewall, and a longitudinal window in the sidewall, an inner shaft disposed within the lumen, and an expandable member having a first end coupled to the outer shaft and a second end coupled to the inner shaft through the window. The expandable member can be positioned adjacent to a target region while in the collapsed configuration. The expandable member can be expanded to an expanded configuration by relative movement of the outer shaft and the inner shaft.

Claims

1. A method for increasing flow of a body fluid through an obstructed body lumen, the method comprising:

inserting a catheter system into the body lumen in a collapsed configuration, the system comprising (i) an outer shaft having a lumen, a sidewall surrounding the lumen, and a window extending longitudinally along a portion of a length of the sidewall and extending through an entire thickness of the sidewall, the window terminating proximal of a distal end of the sidewall, (ii) an inner shaft disposed within the lumen, and (iii) an expandable member having a first end coupled to the outer shaft and a second end coupled to the inner shaft through the window by a slidable collar via an inner shaft to collar bond;

positioning the expandable member adjacent to a target region while in the collapsed configuration; and

expanding the expandable member from the collapsed configuration to an expanded configuration by relative movement of the outer shaft and the inner shaft, wherein, during relative movement of the outer shaft and inner shaft, the end of the expandable member remains at a radial position that is even with or outside of a radial position of the sidewall of the outer shaft.

2. The method of claim 1, wherein the expanding comprises proximally withdrawing the inner shaft while maintaining a longitudinal position of the outer shaft relative to the body lumen.

3. The method of claim 1, wherein the positioning comprises positioning the expandable member within a thrombus, and the expanding comprises expanding the expandable member within the thrombus to engage the thrombus.

4. The method of claim 3, further comprising proximally withdrawing the expandable member into a guide catheter.

5. The method of claim 4, wherein the guide catheter comprises a flared distal opening.

6. The method of claim 4, further comprising removing the catheter system along with the guide catheter and the thrombus from the body lumen.

7. The method of claim 1, wherein the expanding comprises compressing obstructive matter in the target region in a manner that improves flow of body fluid through the obstructive matter.

8. The method of claim 1, further comprising applying negative pressure through a second lumen of the inner shaft to aspirate obstructive matter into the second lumen.

9. The method of claim 1, wherein the inner shaft comprises a second lumen, the method further comprising advancing a working device though the second lumen and out of a distal opening of the catheter system.

10. The method of claim 9, further comprising using the working device to perform a therapeutic or diagnostic task.

11. The method of claim 9, wherein the working device comprises an embolectomy device, and the method further comprises using the embolectomy device to move obstructive matter through the distal opening and into the second lumen.

12. The method of claim 9, further comprising injecting a therapeutic substance to the body lumen via the second lumen of the inner shaft.

13. The method of claim 1, wherein a circumferential extent of the window is from about 90 degrees to about 180 degrees.

14. A method for increasing flow of a body fluid through an obstructed body lumen, the method comprising:

inserting a catheter system into the body lumen in a collapsed configuration, the system comprising a first component, a second component, and an expandable member having a first end coupled to the first component and a second end coupled to the second component, the second component comprising a tubular sidewall having a window along a portion of its length, wherein the window extends through an entire thickness of the sidewall, and wherein the first end is coupled to the first component through the window by a slidable collar via a first component to collar bond;

positioning the expandable member adjacent to a target region while in the collapsed configuration; and

moving the expandable member to an expanded configuration by proximally withdrawing the first component relative to the second component, wherein, during proximal withdrawal of the first component relative to the second component, the first end of the expandable member remains at a radial position that is even with or outside of a radial position of the sidewall of the second component.

15. The method of claim 14, wherein the moving comprises proximally withdrawing the second component while maintaining a longitudinal position of the first component relative to the body lumen.

16. The method of claim 14, wherein the positioning comprises positioning the expandable member within a thrombus, and the moving comprises expanding the expandable member within the thrombus to engage the thrombus.

17. The method of claim 16, further comprising proximally withdrawing the expandable member into a guide catheter.

18. The method of claim 14, wherein the moving comprises compressing obstructive matter in the target region in a manner that improves flow of body fluid through the obstructive matter.

19. The method of claim 14, wherein the first component comprises a first lumen and the second component comprises a second lumen, the first component being movable within the second lumen.

20. The method of claim 19, further comprising advancing a working device though the second lumen and out of a distal opening of the catheter system to perform a therapeutic or diagnostic task.

21. The method of claim 19, further comprising applying negative pressure through the second lumen to aspirate obstructive matter into the second lumen.

22. The method of claim 14, wherein a circumferential extent of the window is from about 90 degrees to about 180 degrees.