Devices and methods for temporarily opening a blood vessel

• US 20100114135A1
• Filed: 10/31/2008
• Published: 05/06/2010
• Est. Priority Date: 10/31/2008
• Status: Abandoned Application

• Current Assignee: Stryker Corporation
• Original Assignee: Stryker Corporation
• Inventors: Grandfield, Ryan, Vu, Emily, Miller, John, Wilson, Scott, Pedersen, Kirk
• Application Number:
  US12/290,646
• Publication Number:
  US 20100114135A1
• Time in Patent Office: Days
• US Class Current: 606/159
• CPC Class Codes: A61B 17/32056 Surgical snare instruments for removing or smashing calculi A61B2017/2212; tonsillotomes A61B17/26
• 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 2017/00867 shape memory effect
• CPC Class Codes: A61B 2017/320733 with a flexible cutting or scraping element, e.g. with a whip-like distal filament member
• 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 2/91 made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes
• CPC Class Codes: A61F 2/95 Instruments specially adapted for placement or removal of stents or stent-grafts
• CPC Class Codes: A61F 2230/0054 V-shaped

Abstract

A device for temporarily opening a blood vessel is provided. The device has an expandable cage mounted over a shaft having a lumen. The lumen has a distal end, which extends beyond the distal end of the cage so that the lumen provides access to the vasculature distal to the obstruction.

Claims

1. A method for temporarily opening a blood vessel, comprising:

providing an expandable cage having openings therein, the cage being coupled to a shaft having a lumen, the cage being mounted over the shaft and being movable from a collapsed position to an expanded position, the cage having a proximal end and a distal end, the shaft extending beyond the distal end of the cage when the cage is in the expanded position;

advancing the cage through a patient'"'"'s vascular system;

expanding the cage to temporarily open a portion of a blood vessel, the cage having an open shape which may permit blood to pass therethrough, wherein the distal end of the expandable cage extends beyond the distal end of the cage; and

removing the cage after a period of time.

2. The method of claim 1, further comprising the step of:

advancing an obstruction removal element through the lumen so that the obstruction removal device extends outwardly from the distal end of the lumen; and

manipulating the obstruction removal device to engage material in the blood vessel.

3. The method of claim 2, further comprising the step of:

moving the cage from the expanded position toward the collapsed position before the manipulating step.

4. The method of claim 2, further comprising the step of:

manipulating the cage and the obstruction removal device to engage the material in the blood flow lumen; and

removing the material by moving the cage and the obstruction removal device proximally at the same time after the manipulating step.

5. The method of claim 1, wherein:

the providing step is carried out with the lumen having at least one hole therein in a portion of the shaft lying beneath the cage.

6. The method of claim 1, further comprising the step of:

releasing the cage so that the cage remains within the patient, the lumen has a proximal end which is exposed to native pressure on a proximal side of the cage, the distal end of the cage being exposed to native pressure on a distal side of the cage so that blood may flow through the lumen.

7. The method of claim 6, further comprising the step of:

coupling a catheter to the cage after the releasing step.

8. The method of claim 7, further comprising the steps of:

advancing an obstruction removal element through the lumen so that the obstruction removal device extends outwardly from the distal end of the lumen; and

manipulating the obstruction removal device to engage material in the blood vessel.

9. A device for temporarily opening a blood vessel, comprising:

a shaft having a lumen with a distal end; and

an expandable cage having openings therein, the cage being coupled to the shaft, the cage being mounted over the shaft and being movable from a collapsed position to an expanded position, the shaft extending beyond the distal end of the cage when the cage is in the expanded position.

10. The device of claim 9, wherein:

the lumen in the shaft has at least one hole therein in a portion of the shaft lying beneath the cage.

11. The device of claim 9, wherein:

the expandable cage is separable from the shaft so that the cage may be deployed.

12. The device of claim 9, wherein:

the shaft is configured to re-engage the cage after the cage has been deployed, the shaft being configured to collapse the cage from the expanded position to the collapsed position as the shaft is advanced over the cage.

13. A method for temporarily opening a blood vessel, comprising:

providing an expandable cage having openings therein, the cage being coupled to a shaft having a lumen, the cage being movable from a collapsed position to an expanded position, the cage having a proximal end and a distal end, the cage forming a reinforcing portion of the shaft which extends proximally from the proximal end of the cage;

advancing the cage through a patient'"'"'s vascular system;

expanding the cage to temporarily open a portion of a blood vessel, the cage having an open shape which may permit blood to pass therethrough; and

removing the cage after a period of time.

14. The method of claim 13, wherein:

the providing step is carried out with the shaft having a distal shaft portion, the distal shaft portion extending distally from the cage, the cage forming a reinforcing portion of the distal shaft portion.

15. The method of claim 13, further comprising the step of:

releasing the cage so that the cage remains within the patient.

16. The method of claim 15, further comprising the step of:

coupling a catheter to the cage after the releasing step.

17. A device for temporarily opening a blood vessel, comprising:

a shaft having a lumen with a distal end; and

an expandable cage having openings therein, the cage being coupled to the shaft, the cage being movable from a collapsed position to an expanded position, the cage having a proximal end and a distal end, the cage forming a reinforcing portion of the shaft which extends proximally from the proximal end of the cage.

18. The device of claim 17, wherein:

the shaft has a distal shaft portion, the distal shaft portion extending distally from the cage, the cage forming a reinforcing portion of the distal shaft portion.