RAPID PERFUSION DEVICES AND METHODS

• US 20100217187A1
• Filed: 02/23/2010
• Published: 08/26/2010
• Est. Priority Date: 11/12/2007
• Status: Abandoned Application

• Current Assignee: Covidien LP (Medtronic Plc)
• Original Assignee: Mindframe LLC
• Inventors: FULKERSON, John, Ferrera, David A., Cragg, Andrew
• Application Number:
  US12/711,100
• Publication Number:
  US 20100217187A1
• Time in Patent Office: Days
• US Class Current: 604/96.10
• 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 17/3207 Atherectomy devices working by cutting or abrading; Similar devices specially adapted for non-vascular obstructions A61B17/32037 takes precedence; endoscopic cutting instruments A61B17/320016
• CPC Class Codes: A61B 17/320725 with radially expandable cutting or abrading elements A61B17/32075 takes precedence
• CPC Class Codes: A61B 2017/00845 of moving parts with respect to each other
• 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 2017/22082 after introduction of a substance
• 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 2/82 Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents stent-grafts for tubular structures of the body other than blood vessels A61F2/04; stent-grafts for blood vessels A61F2/07; instruments specially adapted for placement or removal of stents or stent-grafts A61F2/95; for closing wounds, or holding wounds closed A61B17/04 - A61B17/115; dilators A61M29/00
• CPC Class Codes: A61F 2250/0059 temporary
• CPC Class Codes: A61M 2025/1095 with perfusion means for enabling blood circulation while the balloon is in an inflated state or in a deflated state, e.g. permanent by-pass within catheter shaft
• CPC Class Codes: A61M 2025/1097 with perfusion means for enabling blood circulation only while the balloon is in an inflated state, e.g. temporary by-pass within balloon
• CPC Class Codes: A61M 29/02 Dilators made of swellable material balloon catheters for angioplasty A61M25/104

Abstract

A microcatheter having an active segment reperfuses occluded blood vessels above the junction of the subclavian artery and common carotid artery. The microcatheter is used to penetrate emboli. Once an embolus is penetrated, the active segment of the microcatheter is activated, causing it to expand radially and thereby open a channel in the embolus. Thus, a channel for restored blood flow is created. The blood'"'"'s natural lytic action further degraded the embolus in some cases. Therapeutic agents may be administered through the microcatheter to aid in the reperfusion process.

Claims

1. A microcatheter device, comprising, in combination:

a first segment;

a second segment;

a radially expandable active segment connecting the first segment to the second segment and having an unexpanded state and an expanded state;

an activation member connected to the second segment, wherein the activation member is configured to radially expand and retract the active segment.

2. The microcatheter device of claim 1, wherein the activation member allows a user to deploy the active segment.

3. The microcatheter device of claim 1, wherein the activation member is configured to control the relative distance between the first segment and the second segment.

4. The microcatheter device of claim 1, wherein the activation member comprises a hollow lumen.

5. The microcatheter device of claim 4, wherein the hollow lumen of the activation member is configured to receive a guidewire therein.

6. The microcatheter device of claim 1, wherein the activation member comprises a coil.

7. The microcatheter device of claim 1, wherein the active segment comprises a mesh.

8. The microcatheter device of claim 1, further comprising a plurality of revascularization ports disposed in at least one of the first segment and the second segment.

9. The microcatheter device of claim 1, further comprising a lumen configured to deliver at least one therapeutic agent.

10. A method comprising, in combination:

providing a microcatheter having at least a proximal segment, a distal segment, an active segment between the proximal segment and the distal segment, an activation member attached to the distal segment, and a guidewire;

delivering the guidewire to an embolus;

crossing the embolus with the guidewire;

advancing the microcatheter along the guidewire, whereby the active segment is aligned with the embolus;

radially expanding the active segment.

11. The method of claim 10, further comprising restoring perfusion within a vessel containing the embolus.

12. The method of claim 10, wherein radially expanding the active segment comprises applying tension to the activation member.

13. The method of claim 10, wherein radially expanding the active segment comprises causing a distance between the proximal segment and the distal segment to decrease.

14. The method of claim 10, wherein radially expanding the active segment comprises shortening the longitudinal length of the activation member.

15. The method of claim 10, wherein radially expanding the active segment comprises allowing the activation member to transition from an extended state to a native state, the native state having a shorter longitudinal length than the extended state.

16. The method of claim 10, wherein the embolus is above the juncture of the subclavian artery and common carotid artery.

17. An improved medial device, comprising, in combination:

a proximal segment;

a distal segment;

an active segment having an expanded state and an unexpanded state, wherein the active segment is connected to the proximal segment at a distal end thereof and to the distal segment at a proximal end thereof;

an activation member having a shortened state and an extended state, wherein the activation member is connected to the active segment at a proximal end and a distal end thereof and disposed concentrically within the active segment, wherein the activation member is configured to radially expand and retract the active segment.

18. The improved medial device of claim 17, wherein the shortened state of the activation member corresponds to the expanded state of the active segment and wherein the extended state of the activation member corresponds to the unexpanded state of the active segment.

19. The improved medial device of claim 18, wherein the activation member is serpentine in the shortened state and substantially straight in the extended state.

20. The improved medial device of claim 18, wherein the activation member is a coiled wire selectably providing each of the shortened state and the extended state.

21. The improved medial device of claim 18, wherein the activation member comprises a hollow lumen.

22. The improved medial device of claim 21, further comprising a guidewire advanceable within the hollow lumen of the activation member.