Embolic device delivery system

• US 20070179520A1
• Filed: 01/31/2006
• Published: 08/02/2007
• Est. Priority Date: 01/31/2006
• Status: Active Grant

• Current Assignee: Codman & Shurtleff Incorporated (Johnson & Johnson)
• Original Assignee: Codman & Shurtleff Incorporated (Johnson & Johnson)
• Inventors: West, Stephen
• Granted Patent: US 7,942,894 B2
• Time in Patent Office: Days
• US Class Current: 606/200
• CPC Class Codes: A61B 17/12022 Occluding by internal devices, e.g. balloons or releasable wires plugging an opening in the wall of an organ A61B17/0057; occluders for the cervical canal A61F6/146; vas deferens occluders A61F6/20
• CPC Class Codes: A61B 17/1214 Coils or wires
• CPC Class Codes: A61B 2017/00477 Coupling A61B2017/0046 takes precedence
• CPC Class Codes: A61B 2017/00867 shape memory effect for prostheses A61F2210/0014
• CPC Class Codes: A61B 2017/12054 Details concerning the detachment of the occluding device from the introduction device

Abstract

A vascular occlusion device deployment system is provided for deploying an embolic device at a preselected site within the vasculature of a patient. The deployment system includes a tubular element having a catch movably located within the tubular element. The catch has a normal open configuration and a closed configuration. When in the closed configuration, the catch grasps a headpiece of an embolic device. The tubular element has a constraining section and a releasing section. When the catch is within the constraining section of the tubular element, the constraining section acts upon the catch to keep the catch in a closed configuration. When the catch is moved to the releasing section, the catch returns to its normally open configuration and releases its grasp of the embolic device headpiece.

Claims

1. An embolic device deployment system, comprising:

a tubular element having an inner wall defining a lumen;

a catch movably located within said lumen, the catch having a closed position and an open position, said catch being biased to the open position and sized to hold a portion of an embolic element when in the closed position; and

said tubular element having a constraining section which constrains the catch to the closed position and a releasing section which permits the catch move toward the open position when the catch is located at the releasing section.

2. The deployment system of claim 1 wherein the releasing section comprises at least one indent in the inner wall of the tubular element.

3. The deployment system of claim 2 wherein the indent extends circumferentially along the inner surface.

4. The deployment system of claim 1 wherein the releasing section comprises at least one opening in the inner wall.

5. The deployment system of claim 1 wherein the releasing section is more pliable than the constraining section and increases in diameter when engaged with said catch, thereby allowing the catch to move toward its said open position.

6. The deployment system of claim 1 wherein the releasing section has an internal surface with a transverse extent that is larger than the inner diameter of the constraining section.

7. The deployment system of claim 1 wherein the catch comprises a first jaw and a second jaw, and at least one of said jaws is biased toward a spacing between the jaws which is greater than spacing between the jaws at said closed position.

8. The deployment system of claim 1 wherein said constraining section and said releasing section are spaced longitudinally from each other along said tubular element, further including an elongated member attached to the catch whereby the elongated member is used to move the catch within the lumen between at least said constraining section and said releasing section.

9. The deployment system of claim 8 wherein the elongated member includes a lumen and a second elongated member located within the lumen, said second elongated member being movable linearly within the lumen and having a distal end portion which extends into the catch.

10. A combination of an embolic device and an embolic device deployment system, comprising:

an embolic device;

a tubular element having an inner wall defining a lumen;

a catch movably located within said lumen, the catch having a closed position and an open position, said catch being biased to the open position, said catch grasping a portion of the embolic when in the closed position and releasing the portion of the embolic coil when is the open position; and

said tubular element having a constraining section which constrains the catch to the closed position and a releasing section which permits the catch to move toward the open position when the catch is located at the releasing section to thereby release the embolic device.

11. The combination of claim 10 wherein the releasing section comprises at least one indent in the inner wall of the tubular element.

12. The combination of claim 11 wherein the indent extends circumferentially along the inner surface.

13. The combination of claim 10 wherein the releasing section comprises at least one opening in the inner wall.

14. The combination of claim 10 wherein the releasing section is more pliable than the constraining section to the extent that the releasing section increases in its transverse extent when engaged with the catch, thereby allowing the catch to move toward said open position and release the embolic device.

15. The combination of claim 10 wherein the releasing section has an internal surface with a transverse extent that is larger than the inner diameter of the constraining section.

16. The combination of claim 10 wherein the catch comprises a first jaw and a second jaw.

17. The combination of claim 10 further including an elongated member attached to the catch whereby the elongated member is used to move the catch within the lumen.

18. The combination of claim 17 wherein the elongated member includes a lumen and a second elongated member located within the lumen, said second elongated member being movable linearly within the lumen and having a distal end portion which extends into the catch.

19. A method of delivering an embolic device to a location within the vasculature of a patient, comprising:

providing a tubular element having an inner wall defining a lumen, a catch having a closed position and an open position movably located within the lumen, said catch being biased to the open position, said catch grasping a portion of the embolic device when in the closed position and releasing the portion of the embolic coil when in the open position, said tubular element having a constraining segment which constrains the catch to the closed position and a releasing section which permits the catch to move toward the open position;

inserting a portion of an embolic device into the catch;

positioning the catch within the constraining section of the tubular element to maintain the catch in a closed position;

manipulating the tubular element to guide the embolic device to a preselected location within the vasculature of a patient; and

moving the catch into the releasing section of the tubular element to allow the catch to move to the open configuration, thereby releasing the embolic element.

20. The method of claim 19 further including an elongated member attached to the catch, and the moving comprises manipulating the elongated member to move the catch longitudinally between at least the constraining section and the releasing section.