Wire and lock mechanism

• US 8,262,690 B2
• Filed: 11/12/2004
• Issued: 09/11/2012
• Est. Priority Date: 03/06/2001
• Status: Expired due to Fees

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Inventors: Petersen, Scott R.
• Primary Examiner(s): SEVERSON, RYAN J
• Application Number:
  US10/987,602
• Publication Number:
  US 20050090810A1
• Time in Patent Office: 2,860 Days
• Field of Search: 606/200, 606/108, 606/159, 606/191, 606/198
• US Class Current: 606/200
• CPC Class Codes: A61B 2017/00469 for insertion of instruments, e.g. guide wire, optical fibre
• CPC Class Codes: A61B 2017/347 Locking means, e.g. for locking instrument in cannula
• CPC Class Codes: A61F 2/011 Instruments for their placement or removal
• 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 2/95 Instruments specially adapted for placement or removal of stents or stent-grafts
• CPC Class Codes: A61F 2230/0006 circular
• 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 2025/09183 having tools at the distal tip

Abstract

Methods and devices for delivering and/or retrieving a filter fixed to a guidewire disposed within a blood vessel are disclosed. A system in accordance with the present invention comprises, an outer shaft having a proximal end, distal end and a wall defining an outer shaft lumen. The system also includes a stop mechanism disposed within the outer shaft lumen. The stop mechanism is preferably configured such that relative axial movement between the guidewire and the outer shaft may be selectively precluded.

Claims

1. An assembly, comprising:

an outer shaft having a proximal portion, a distal portion, and a longitudinally collapsible portion disposed between the proximal and distal portions, the outer shaft defining an outer shaft lumen, the longitudinally collapsible portion moveable between an extended configuration and a collapsed configuration;

a guidewire disposed within the outer shaft lumen, the guidewire including a filter fixed to the guidewire; and

guidewire gripping means positioned within the outer shaft lumen and fixedly attached to the outer shaft, the guidewire gripping means reversibly moveable between a relaxed configuration in which the guidewire may move freely in a longitudinal direction and a constricted configuration in which the guidewire is constrained from movement in a longitudinal direction;

wherein the guidewire extends through the guidewire gripping means.

2. The assembly of claim 1, wherein the guidewire gripping means are positioned proximally of the longitudinally collapsible portion.

3. The assembly of claim 1, further comprising an inner shaft having a distal end, the inner shaft disposed within the outer shaft, the guidewire extending through the inner shaft.

4. The assembly of claim 3, wherein the guidewire gripping means and the distal end of the inner shaft are configured such that relative longitudinal movement between the guidewire gripping means and the distal end of the inner shaft cause the guidewire gripping means to reversibly move between the relaxed configuration and the constrained configuration.

5. The assembly of claim 4, wherein extending the inner shaft distally relative to the outer shaft causes the guidewire gripping means to move into the constrained configuration.

6. The assembly of claim 5, wherein retracting the inner shaft proximally relative to the outer shaft causes the guidewire gripping means to move into the relaxed configuration.

7. The assembly of claim 1, further comprising an elongate member having a distal end configured to engage the longitudinally collapsible portion and reversibly urge the longitudinally collapsible portion between the extended configuration and the collapsed configuration.

8. The assembly of claim 1, wherein the outer shaft comprises a distal end defining a distal guidewire port, the outer shaft further comprising a proximal guidewire port positioned proximal of the longitudinally collapsible portion.

9. The assembly of claim 8, wherein the distal guidewire port and the proximal guidewire port are less than about 55 centimeters apart when the longitudinally collapsible portion is in the extended configuration.

10. The assembly of claim 9, wherein the distal guidewire port and the proximal guidewire port are less than about 45 centimeters apart when the longitudinally collapsible portion is in the extended configuration.

11. The assembly of claim 9, wherein the distal guidewire port and the proximal guidewire port are less than about 35 centimeters apart when the longitudinally collapsible portion is in the extended configuration.

12. An assembly, comprising:

an outer shaft defining an outer shaft lumen;

an inner shaft defining an inner shaft lumen, the inner shaft disposed within the outer shaft lumen;

a guidewire disposed within the inner shaft lumen, the guidewire including a filter fixed to the guidewire; and

guidewire gripping means positioned within the outer shaft lumen and fixedly attached to the outer shaft, the guidewire gripping means reversibly moveable between a relaxed configuration in which the guidewire may move freely in a longitudinal direction and a constricted configuration in which the guidewire is constrained from movement in all longitudinal directions.

13. The assembly of claim 12, wherein the inner shaft is adapted to reversibly move the guidewire gripping means from the relaxed configuration to the constrained configuration.