ANGIOPLASTY DEVICE AND METHOD OF MAKING SAME

• US 20080214999A1
• Filed: 01/09/2008
• Published: 09/04/2008
• Est. Priority Date: 02/01/2000
• Status: Active Grant

• Current Assignee: Kletschka Foundation
• Original Assignee: Kletschka Foundation
• Inventors: Packard, Brian, Kletchka, Harold D.
• Granted Patent: US 7,922,691 B2
• Time in Patent Office: Days
• US Class Current: 604/96.01
• CPC Class Codes: A61B 17/22032 having inflatable gripping elements balloon catheters A61M25/10
• 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 2017/00526 Methods of manufacturing
• CPC Class Codes: A61B 2017/22001 Angioplasty, e.g. PCTA
• CPC Class Codes: A61B 2017/22051 with an inflatable part, e.g. balloon, for positioning, blocking, or immobilisation A61B2017/22048, A61B2017/3486 take precedence
• CPC Class Codes: A61B 2017/2212 having a closed distal end, e.g. a loop
• 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 2/848 having means for fixation to the vessel wall, e.g. barbs
• CPC Class Codes: A61F 2002/8483 Barbs
• CPC Class Codes: A61M 2025/0039 characterized by lumina being arranged coaxially
• CPC Class Codes: A61M 2025/004 characterized by lumina being arranged circumferentially
• CPC Class Codes: A61M 2025/0079 Separate user-activated means, e.g. guidewires, guide tubes, balloon catheters or sheaths, for sealing off an orifice, e.g. a lumen or side holes, of a catheter
• CPC Class Codes: A61M 2025/091 having a lumen for drug delivery or suction
• CPC Class Codes: A61M 2025/09125 Device for locking a guide wire in a fixed position with respect to the catheter or the human body
• CPC Class Codes: A61M 2025/1015 having two or more independently movable balloons where the distance between the balloons can be adjusted, e.g. two balloon catheters concentric to each other forming an adjustable multiple balloon catheter system
• 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 2025/1093 having particular tip characteristics
• CPC Class Codes: A61M 25/0029 characterized by features relating to least one lumen located at the middle part of the catheter, e.g. slots, flaps, valves, cuffs, apertures, notches, grooves or rapid exchange ports catheter shaft surface irregularities A61M2025/006
• CPC Class Codes: A61M 25/0074 Dynamic characteristics of the catheter tip, e.g. openable, closable, expandable or deformable
• CPC Class Codes: A61M 25/0082 Catheter tip comprising a tool
• CPC Class Codes: A61M 25/1002 : characterised by balloon shape A61M25/1006, A61M25/1009 take precedence
• CPC Class Codes: A61M 25/1006 : Balloons formed between concentric tubes
• CPC Class Codes: A61M 25/1011 : Multiple balloon catheters
• CPC Class Codes: A61M 25/104 : used for angioplasty
• CPC Class Codes: A61M 29/02 : Dilators made of swellable material balloon catheters for angioplasty A61M25/104

Abstract

An angioplasty device and particle trap for use in removal of a particle from a small diameter vessel or vessel-like structure is disclosed. One embodiment includes a catheter for insertion into a vessel-like structure, the catheter having a catheter wall and a movable member, a trap operably connected to the catheter wall and to the movable member, wherein relative motion between the catheter wall and the movable member actuates the trap. In one embodiment, the expanded trap is formed from struts in a spiral-shaped configuration. In one embodiment, the contracted trap forms a waist to creates a pinch-point to trap particles. In one embodiment, the contracted trap forms a cocoon-like structure to further trap particles. In one embodiment, the angioplasty device includes a handle to actuate the trap from a contracted position to an expanded position and return to a contracted position. The handle provides rotational or longitudinal or both types of movement to actuate the trap.

Claims

1. An apparatus for insertion into a vessel-like structure, the apparatus comprising:

a catheter for insertion into the vessel-like structure, the catheter having a catheter wall and a lumen extending longitudinally therethrough;

a moveable member disposed within the lumen;

at least one helically twisted flexible strut fixedly connected to the catheter wall and to the moveable member; and

a membrane operably connected to the at least one flexible strut to form a trap, wherein relative motion between the catheter wall and the moveable member actuates the trap between a helically twisted contracted position and a helically twisted expanded position.

2. The apparatus of claim 1, further comprising a balloon operably connected to the catheter and adapted to compress an obstruction.

3. The angioplasty device of claim 2, wherein the catheter further defines an inflation/deflation lumen fluidly connected to the balloon.

4. The apparatus of claim 2, wherein:

the trap has a distal end;

the catheter defines at least one suction aperture situated between the balloon and the distal end of the trap; and

the catheter comprises a suction lumen in operable communication with the at least one suction aperture.

5. The apparatus of claim 1, wherein the helically twisted contracted position forms a waist.

6. The apparatus of claim 1, wherein the trap is actuated by relative longitudinal motion between the catheter wall and the moveable member.

7. The apparatus of claim 1, wherein the trap is actuated by relative rotational motion between the catheter wall and the moveable member.

8. The apparatus of claim 1, wherein the trap is actuated by relative rotational and longitudinal motion between the catheter wall and the moveable member.

9. The apparatus of claim 1, wherein the moveable member defines a guidewire lumen adapted to slidably receive a guidewire.

10. The apparatus of claim 1, wherein the guidewire is hollow.

11. The apparatus of claim 1, wherein the at least one strut forms a profile having a first portion and a second portion, wherein the first portion has a first radius of curvature and the second portion has a second radius of curvature, the first radius of curvature is larger than the second radius of curvature causing the first portion to contract first to form a cocoon.

12. The apparatus of claim 1, wherein the at least one strut includes a first portion and a second portion.

13. The apparatus of claim 12, wherein the first portion is formed to be thinner than the second portion causing the first portion to contract first to form a cocoon.

14. The apparatus of claim 12, wherein the first portion is formed of a material more resilient than the second portion causing the first portion to contract first to form a cocoon.

15. The apparatus of claim 12, wherein a cross section of the first portion has a smaller moment of inertia than a cross section of the second portion with a larger moment of inertia, causing the first portion to contract first to form a cocoon.

16. The apparatus of claim 1, further comprising a coupling device that selectively couples the trap to the catheter wall.

17. The apparatus of claim 1, comprising a plurality of helically twisted flexible struts.

18. The apparatus of claim 1, comprising a handle to provide longitudinal and rotational movement of the moveable member for actuating the trap.

19. The apparatus of claim 1, wherein the moveable member is a guidewire having a solid first portion and a second portion that includes a suction lumen.

20. The apparatus of claim 4, wherein the suction lumen has a first portion with a first diameter and a second portion with a second diameter, wherein the second diameter is larger than the first diameter.