Right retrieval mechanism

• US 20050065548A1
• Filed: 09/23/2003
• Published: 03/24/2005
• Est. Priority Date: 09/23/2003
• Status: Active Grant

• Current Assignee: Encore Medical Inc.
• Original Assignee: Cardia, Inc.
• Inventors: Marino, Joseph A., Corcoran, Michael P.
• Granted Patent: US 7,658,748 B2
• Time in Patent Office: Days
• US Class Current: 606/213
• CPC Class Codes: A61B 17/0057 Implements for plugging an opening in the wall of a hollow or tubular organ, e.g. for sealing a vessel puncture or closing a cardiac septal defect sutures A61B17/04; closing rectum or urethra near body surface A61F2/0009
• CPC Class Codes: A61B 2017/00575 for closure at remote site, e.g. closing atrial septum defects
• CPC Class Codes: A61B 2017/00592 Elastic or resilient implements
• CPC Class Codes: A61B 2017/00606 Implements H-shaped in cross-section, i.e. with occluders on both sides of the opening
• CPC Class Codes: A61B 2017/00623 Introducing or retrieving devices therefor

Abstract

An occlusion device for the closure of physical apertures, such as vascular or septal apertures, that can be retrieved, reloaded, and redeployed in situ. A plurality of puller arms and a floating center post allow the device to collapse for loading when a physician pulls on a delivery device, which is attached to the floating center post. This also allows for easy loading of the device into a catheter for delivery to the heart.

Claims

1. An automatic loading mechanism for an occlusion device having an occluding body with a fixed center post, the mechanism comprising:

a plurality of puller arms attached to the occluding body for collapsing the device; and

a floating center post connected to the puller arms.

2. The mechanism of claim 1 wherein the puller arms are constructed of nickel titanium.

3. The mechanism of claim 1 wherein an angle between adjacent puller arms is between about 5°

and about 180°

.

4. The mechanism of claim 3 wherein the puller arms are offset from one another by about 45°

.

5. The mechanism of claim 1 wherein the floating center post comprises an axially extending groove which reversibly connects with an axially extending pin extending from the fixed center post.

6. The mechanism of claim 1 wherein the floating center post is constructed of platinum-iridium.

7. The mechanism of claim 1 wherein the fixed center post is constructed of platinum-iridium.

8. A septal occlusion device comprising:

an occluding body comprising a first and second collapsible support frame;

a plurality of puller arms attached to the occluding body; and

a floating center post which, when pulled, pulls the puller arms to collapse the first collapsible support frame.

9. The device of claim 8 wherein the arms are constructed of nickel titanium.

10. The mechanism of claim 8 wherein an angle between adjacent puller arms is between about 5°

and about 180°

.

11. The mechanism of claim 10 wherein the puller arms are offset from one another by about 45°

.

12. The device of claim 8 wherein the floating center post comprises an axially extending groove which reversibly connects with an axially extending pin extending from the fixed center post.

13. The device of claim 8 wherein the floating centerpost is constructed of platinum-iridium.

14. The device of claim 8 wherein the fixed center post is constructed of platinum-iridium.

15. The device of claim 8 wherein the support frames each comprise a wire hoop and a plurality of support arms.

16. The device of claim 15 wherein the support arms are constructed of stranded wire.

17. An occlusion device comprising:

a fixed center section extending in an axial direction;

right and left elastic shape memory fixation devices attached to the fixed center section;

right and left sheets attached to the right and left fixation devices, respectively;

right and left support hoops attached to the right and left fixation devices, respectively;

a plurality of puller arms; and

a floating center post which, when pulled, pulls the puller arms to collapse the first collapsible support frame.

18. The occlusion device of claim 17 wherein the arms are constructed of nickel titanium.

19. The mechanism of claim 17 wherein an angle between adjacent puller arms is between about 5°

and about 180°

.

20. The mechanism of claim 19 wherein the puller arms are offset from one another by about 45°

.

21. The occlusion device of claim 17 wherein the floating center post comprises an axially extending groove which reversibly connects with an axially extending pin extending from the fixed center post.

22. The occlusion device of claim 17 wherein the floating center post is constructed of platinum-iridium.

23. The occlusion device of claim 17 wherein the fixed center post is constructed of platinum-iridium.

24. An occlusion device for occluding a septal defect, the occlusion device comprising:

a fixed center post;

a first occluding body connected to the center post, wherein the first occluding body comprises a hoop at its outer edge;

a second occluding body connected to the center post, wherein the second occluding body comprises a hoop at its outer edge;

a plurality of puller arms connected to the first occluding body; and

a floating center post which, when pulled, pulls the puller arms to collapse the first occluding body.

25. The occlusion device of claim 24 wherein the arms are constructed of nickel titanium.

26. The mechanism of claim 24 wherein an angle between adjacent puller arms is between about 5°

and about 180°

.

27. The mechanism of claim 26 wherein the puller arms are offset from one another by about 45°

.

28. The occlusion device of claim 24 wherein the floating center post comprises an axially extending groove which reversibly connects with an axially extending pin extending from the fixed center post.

29. The occlusion device of claim 24 wherein the floating center post is constructed of platinum-iridium.

30. The occlusion device of claim 24 wherein the fixed center post is constructed of platinum-iridium.

31. An occlusion device for the closure of a physical anomaly, the device comprising:

a fixed center post having distal and proximal ends;

a first set of support arms extending from the distal end of the center post;

a first sheet attached to the first set of arms;

a first hoop attached to the first set of arms and the first sheet;

a second set of support arms extending from the proximal end of the center post;

a second sheet attached to the second set of support arms;

a second hoop attached to the second set of arms and the second sheet;

a floating center post located on the proximal end of the device; and

a plurality of puller arms attached to the floating center post and first support hoop which collapse the first support hoop when the floating center post is pulled.

32. The occlusion device of claim 31 wherein the arms are constructed of nickel titanium.

33. The mechanism of claim 31 wherein an angle between adjacent puller arms is between about 5°

and about 180°

.

34. The mechanism of claim 33 wherein the puller arms are offset from one another by about 45°

.

35. The occlusion device of claim 31 wherein the floating center comprises an axially extending groove which reversibly connects with an axially extending pin extending from the fixed center post.

36. The occlusion device of claim 31 wherein the floating center post is constructed of platinum-iridium.

37. The occlusion device of claim 31 wherein the fixed center post is constructed of platinum-iridium.

38. An occlusion device comprising:

a first collapsible support frame which comprises a support hoop;

a second collapsible support frame which comprises a support hoop;

a first sheet attached to the first collapsible support frame;

a second sheet attached to the second collapsible support frame;

a plurality of puller arms attached to the first support hoop; and

a floating center post which, when pulled, engages the puller arms to collapse the first collapsible support frame.

39. The occlusion device of claim 38 wherein the arms are constructed of nickel titanium.

40. The mechanism of claim 38 wherein an angle between adjacent puller arms is between about 5°

and about 180°

.

41. The mechanism of claim 40 wherein the puller arms are offset from one another by about 45°

.

42. The occlusion device of claim 38 wherein the floating center comprises an axially extending groove which reversibly connects with an axially extending pin extending from the fixed center post.

43. The occlusion device of claim 38 wherein the floating center is constructed of platinum-iridium.

44. The occlusion device of claim 38 wherein the fixed center post is constructed of platinum-iridium.