Filamentary devices for treatment of vascular defects

Patent metadata

Field	Value
Publication number	US-2016015398-A1
Application number	US-201514871352-A
Country	US
Kind code	A1
Filing date	Sep 30, 2015
Priority date	Aug 16, 2013
Publication date	Jan 21, 2016
Grant date	—

Abstract

Devices for treatment of a cerebral aneurysm are described. Embodiments may include a self-expanding permeable shell having a radially constrained elongated state configured for delivery within a catheter lumen, an expanded state with a globular and longitudinally shortened configuration relative to the radially constrained state, and a plurality of elongate filaments that are woven together, which define a cavity of the permeable shell. The permeable shell includes composite filaments. The composite filaments include drawn filled tube wires having an external nitinol tube and a highly radiopaque material concentrically disposed within the external tube. The composite filaments may have a diameter of 0.00075″, 0.001″, 0.0015″, and/or 0.00125″.

First claim

What is claimed is:

1 . A device for treatment of a patient's cerebral aneurysm, comprising:
a resilient self-expanding permeable shell having a distal end and a proximal end and including a radially constrained elongated state configured for delivery within a catheter lumen, an expanded state with a globular and longitudinally shortened configuration relative to the radially constrained state, and a plurality of elongate filaments which are woven together and define a cavity of the permeable shell, the permeable shell comprising at least some composite filaments, the composite filaments comprising drawn filled tube wires comprising an external nitinol tube and a highly radiopaque material concentrically disposed within the external nitinol tube, wherein the permeable shell has at least about 40% composite filaments relative to a total number of filaments, and wherein a total number of filaments is about 70 to about 300, and wherein each of the composite filaments has a diameter selected from the group consisting of 0.00075″, 0.001″, 0.0015″, and 0.00125″.

2 . The device of claim 1 , wherein the plurality of elongate filaments are secured relative to each other at the distal end of the permeable shell.

3 . The device of claim 1 , wherein the plurality of elongate filaments are secured relative to each other at the proximal end of the permeable shell.

4 . The device of claim 1 , wherein the drawn filled tube wires have a fill ratio of cross sectional area of between about 10% and about 50%.

5 . The device of claim 1 , wherein the drawn filled tube wires have a fill ratio of cross sectional area of between about 20% and about 40%.

6 . The device of claim 1 , wherein the drawn filled tube wires have a fill ratio of cross sectional area of between about 25% and about 35%.

7 . The device of claim 1 , wherein the highly radiopaque material of the at least some composite filaments comprises tantalum.

8 . The device of claim 1 , wherein the highly radiopaque material of the at least some composite filaments comprises platinum.

9 . The device of claim 1 , wherein the highly radiopaque material of the at least some composite filaments comprises gold.

10 . The device of claim 1 , wherein the plurality of elongate filaments have a total cross sectional area, and wherein a total cross sectional area of the highly radiopaque material is between about 11% and about 30% of the total cross sectional area of the plurality of elongate filaments.

11 . The device of claim 10 , wherein the total cross sectional area of the highly radiopaque material is between about 15% and about 30% of the total cross sectional area of the plurality of elongate filaments.

12 . The device of claim 11 , wherein the total cross sectional area of the highly radiopaque material is between about 15% and about 22% of the total cross sectional area of the plurality of elongate filaments.

13 . The device of claim 11 , wherein the total cross sectional area of the highly radiopaque material is between about 19% and about 30% of the total cross sectional area of the plurality of elongate filaments.

14 . The device of claim 10 , wherein the total cross sectional area of the highly radiopaque material is between about 11% and about 18.5% of the total cross sectional area of the plurality of elongate filaments.

15 . The device of claim 1 , wherein each of the elongate filaments of the plurality of elongate filaments comprises a first end and a second end, and wherein the first ends and second ends of the elongate filaments are secured relative to each other at the proximal end of the permeable shell.

16 . The device of claim 15 , wherein each of the elongate filaments of the plurality of elongate filaments comprises a center portion between its first end and second end, the center portion forming a curved apex at the distal end of the permeable shell.

17 . The device of claim 16 , wherein the distal end of the permeable shell comprises a closed distal apex.

18 . The device of claim 1 , wherein the permeable shell has composite filaments having diameters of 0.0015″ and 0.001″.

19 . The device of claim 1 , wherein the woven elongate filaments form a first average braid material density BD 1 at a distal portion of the permeable shell and a second average braid material density BD 2 at a proximal portion of the permeable shell, the second braid material density BD 2 greater than the first braid material density BD 1 .

20 . The device of claim 1 , wherein the woven elongate filaments comprise a first subset of filaments each having a first transverse dimension and a second subset of filaments each having a second transverse dimension, the second transverse dimension greater than the first transverse dimension.

Assignees

• Sequent Medical Inc

Inventors

• Hewitt Todd J
• Merritt Brian E
• Patterson William R

Classifications

• A61B2017/00867

  shape memory effect · CPC title

• A61B17/12172 Primary

  having a pre-set deployed three-dimensional shape (methods of manufacturing A61B2017/00526) · CPC title

• A61B17/12013

  for use in minimally invasive surgery, e.g. endoscopic surgery · CPC title

• A61B17/12031

  complete occlusion · CPC title

• A61B17/12113 Primary

  within an aneurysm · CPC title