Multi-layer braided structures for occluding vascular defects and for occluding fluid flow through portions of the vasculature of the body

Patent metadata

Field	Value
Publication number	US-10624619-B2
Application number	US-201715850044-A
Country	US
Kind code	B2
Filing date	Dec 21, 2017
Priority date	Mar 19, 2004
Publication date	Apr 21, 2020
Grant date	Apr 21, 2020

Abstract

Described herein are a collapsible medical device and associated methods of occluding an abnormal opening in a body organ, wherein the medical device is shaped from plural layers of a heat-treatable metal fabric. Each of the fabric layers is formed from a plurality of metal strands and the assembly is heat-treated within a mold in order to substantially set a desired shape of the device. By incorporating plural layers in the thus-formed medical device, the ability of the device to rapidly occlude an abnormal opening in a body organ is significantly improved.

First claim

What is claimed is:

1. A medical device comprising:
an outer fabric layer surrounding at least one inner fabric layer, each of the outer fabric layer and the at least one inner fabric layer comprising a plurality of braided strands extending from a proximal end to a distal end of each of the outer fabric layer and the at least one inner fabric layer, the outer fabric layer and the at least one inner fabric layer having an expanded preset configuration, the expanded preset configuration comprising at least one expanded diameter portion configured to be constrained to a lesser cross-sectional dimension for delivery to a treatment site in a patient's body, the outer fabric layer and the at least one inner fabric layer having a memory property such that the at least one expanded diameter portion tends to return to the expanded preset configuration when unconstrained.

2. The medical device as in claim 1 , wherein the at least one expanded diameter portion is disk shaped.

3. The medical device as in claim 1 , wherein the at least one expanded diameter portion is cylindrical shaped.

4. The medical device as in claim 1 , wherein the at least one expanded diameter portion is bell shaped.

5. The medical device as in claim 1 , further comprising a plurality of expanded diameter portions.

6. The medical device as in claim 5 , wherein the plurality of expanded diameter portions have the same outer diameter.

7. The medical device as in claim 5 , wherein the plurality of expanded diameter portions have different outer diameters.

8. The medical device as in claim 5 , wherein the plurality of expanded diameter portions have similar shapes.

9. The medical device as in claim 5 , wherein a pair of the plurality of expanded diameter portions are joined by a segment having a smaller outer diameter than each of the pair of expanded diameter portions.

10. The medical device as in claim 9 , wherein the medical device comprises a proximal face, a distal face, and at least two intermediate faces disposed between the proximal face and the distal face.

11. The medical device as in claim 1 , wherein proximal ends of the plurality of braided strands of the outer fabric layer and the at least one inner fabric layer are secured together.

12. The medical device as in claim 1 , wherein distal ends of the plurality of braided strands of the outer fabric layer and the at least one inner fabric layer are secured together.

13. The medical device as in claim 1 , wherein proximal ends and the distal ends of the plurality of braided strands of the outer fabric layer and the at least one inner fabric layer are secured together.

14. The medical device as in claim 1 , wherein a pitch of the plurality of braided strands comprising the outer fabric layer and the at least one inner fabric layer are generally equal.

15. The medical device as in claim 1 , wherein the braided strands comprising the outer fabric layer are of a larger diameter than the braided strands comprising the at least one inner fabric layer.

16. The medical device as in claim 1 , wherein a number of braided strands comprising the at least one inner fabric layer is greater than a number of braided strands comprising the outer fabric layer.

17. The medical device as in claim 1 , further comprising a third fabric layer disposed within the at least one inner fabric layer, the third fabric layer comprising a plurality of braided strands.

18. The medical device as in claim 17 , wherein the plurality of braided strands of the third fabric layer comprise proximal ends and distal ends.

19. The medical device as in claim 18 , wherein at least one of the proximal ends and the distal ends of the plurality of braided strands of each of the outer fabric layer, the at least one inner fabric layer, and the third fabric layer are secured together.

20. The medical device as in claim 18 , wherein the third fabric layer has an expanded preset configuration corresponding to the expanded preset configuration of the outer fabric layer and the at least one inner fabric layer.

Assignees

• St Jude Medical Cardiology Div Inc

Inventors

• Amplatz Kurt
• Gu Xiaoping
• Oslund John C
• Thill Gary A

Classifications

• A61B17/12022

  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 title

• A61B17/12122

  within the heart (for closing a cardiac septal defect A61B17/0057) · CPC title

• A61B2017/00575

  for closure at remote site, e.g. closing atrial septum defects · CPC title

• A61B2017/00606

  Implements H-shaped in cross-section, i.e. with occluders on both sides of the opening · CPC title

• A61B2017/00867

  shape memory effect · CPC title