Retrievable device having a reticulation portion with staggered struts

• US 20060287701A1
• Filed: 06/19/2006
• Published: 12/21/2006
• Est. Priority Date: 06/20/2005
• Status: Active Grant

• Current Assignee: Cook Medical Incorporated (Cook Group Incorporated)
• Original Assignee: Cook Incorporated (Cook Group Incorporated)
• Inventors: Pal, Dharmendra
• Granted Patent: US 8,109,962 B2
• Time in Patent Office: Days
• US Class Current: 623/1.110
• 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 2/91 made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes
• CPC Class Codes: A61F 2/915 with bands having a meander structure, adjacent bands being connected to each other
• CPC Class Codes: A61F 2002/018 made from tubes or sheets of material, e.g. by etching or laser-cutting
• CPC Class Codes: A61F 2002/91508 the meander having a difference in amplitude along the band
• CPC Class Codes: A61F 2002/91525 within the whole structure different bands showing different meander characteristics, e.g. frequency or amplitude
• CPC Class Codes: A61F 2002/91533 characterised by the phase between adjacent bands
• CPC Class Codes: A61F 2002/91558 connected peak to peak
• CPC Class Codes: A61F 2002/9528 for retrieval of stents
• CPC Class Codes: A61F 2230/0006 circular
• CPC Class Codes: A61F 2230/0076 ellipsoidal or ovoid
• CPC Class Codes: A61F 2230/008 paraboloidal

Abstract

A retrievable device for treatment of a stenotic lesion in a body vessel is disclosed. The device comprises a reticulation portion including a plurality of struts connected together in a singly staggered configuration distally along a longitudinal axis. The plurality of struts of the reticulation portion is configured to fold along the longitudinal axis defining a collapsed state of the device for retrieval. The device further includes an expandable body distally extending from the reticulation portion along an outer diameter for treatment of the stenotic lesion. The expandable body is configured to expand in the open state and collapsed in the collapsed state of the reticulation portion for retrieval. The device further comprises a retrieval stem extending proximally from the reticulation portion for retrieval of the device in the collapsed state.

Claims

1. A retrievable device for treatment of a stenotic lesion in a body vessel, the device comprising:

a reticulation portion having an expanded state and a collapsed state, the reticulation portion including a plurality of struts connected together in a singly staggered configuration distally along a longitudinal axis, the plurality of struts of the reticulation portion being configured to fold along the longitudinal axis defining the collapsed state of the device for retrieval;

an expandable body distally extending from the reticulation portion along an outer diameter for treatment of the stenotic lesion, the expandable body being configured to expand in the open state and collapsed in the collapsed state of the reticulation portion for retrieval; and

a retrieval stem extending proximally from the reticulation portion for retrieval of the device in the collapsed state.

2. The device of claim 1 wherein the reticulation portion extends along the outer diameter.

3. The device of claim 1 wherein the number of struts on the reticulation portion increases in a singly staggered configuration along the longitudinal axis.

4. The device of claim 3 wherein the number of struts adjacent the retrieval stem of the device is one strut and the number of struts at the distal end is up to 10 struts.

5. The device of claim 1 wherein the outer diameter of the reticulation portion is substantially constant distally extending therealong to the expandable body.

6. The device of claim 1 wherein the reticulation portion distally increases in width in a singly staggered configuration in the collapsed state.

7. The device of claim 1 wherein each of the plurality of struts is connected to another strut at a pivotal joint, each pivotal joint being configured to allow each of the struts to singly fold distally along the longitudinal axis from the deployed state to the collapsed state.

8. The device of claim 1 wherein the expandable body comprises a plurality of branches connected together, the plurality of branches being configured to fold along the longitudinal axis as the plurality of struts fold therealong.

9. The device of claim 1 wherein the reticulation portion is made of shape memory material configured to expand the reticulation portion in the deployed state at a first temperature and collapse the reticulation portion in the collapsed state at a second temperature.

10. The device of claim 1 wherein the expandable body is made of shape memory material configured to expand the expandable body in the deployed state at a first temperature and collapse the expandable body in the collapsed state at a second temperature.

11. The device of claim 1 wherein the retrieval stem extends proximally along the outer diameter of the reticulation portion.

12. An assembly for treating a stenotic lesion in a body vessel, the assembly comprising:

an outer catheter including a tubular body having a distal end; and

a retrievable device coaxially disposable within the tubular body of the outer catheter and deployable through the distal end thereof for treatment of the stenotic lesion in the body vessel, the device comprising;

a reticulation portion having a deployed state and a collapsed state, the reticulation portion including a plurality of struts connected together in a singly staggered configuration distally along a longitudinal axis, the plurality of struts of the reticulation portion being configured to fold along the longitudinal axis defining a collapsed state of the device for retrieval;

an expandable body distally extending from the reticulation portion along an outer diameter for treatment of the stenotic lesion, the expandable body being configured to expand in the deployed state and collapsed in the collapsed state of the reticulation portion for retrieval; and

a retrieval stem extending proximally from the reticulation portion for retrieval of the device in the collapsed state.

13. The assembly of claim 12 further comprising:

a balloon catheter comprising a tube member having an inner lumen, the balloon catheter further having an expandable balloon attached to and in fluid communication with the tube member for angioplasty at the stenotic lesion, the expandable balloon having distal and proximal portions;

a wire guide configured to be disposed through the inner lumen of the balloon catheter for percutaneous guidance through the body vessel; and

an introducer sheath through which the outer catheter is inserted for percutaneous insertion to the body vessel.

14. The assembly of claim 12 wherein the balloon catheter further includes a proximal end, the proximal end having a hub in fluid communication with the balloon for fluid to be passed therethrough for inflation and deflation of the balloon during treatment of the stenotic lesion.

15. The assembly of claim 12 wherein the reticulation portion extends along the outer diameter.

16. The assembly of claim 12 wherein the number of struts on the reticulation portion increases in a singly staggered configuration along the longitudinal axis.

17. The assembly of claim 16 wherein the number of struts adjacent the retrieval stem of the device is one strut and the number of struts at the distal end is up to 10 struts.

18. The assembly of claim 12 wherein the outer diameter of the reticulation portion is substantially constant distally extending therealong to the expandable body.

19. The assembly of claim 12 wherein the expandable body comprises a plurality of branches connected together, the plurality of branches being configured to fold along the longitudinal axis as the plurality of struts fold therealong.

20. The assembly of claim 12 wherein the retrieval stem extends proximally along the outer diameter of the reticulation portion.

21. A method for treating a stenotic lesion in a body vessel, the method comprising:

providing a retrievable stent deployed from an outer catheter at the stenotic lesion in the body vessel, the stent comprising;

a reticulation portion having a deployed state and a collapsed state, the reticulation portion including a plurality of struts connected together in a singly staggered configuration distally along a longitudinal axis, the plurality of struts of the reticulation portion being configured to fold along the longitudinal axis defining a collapsed state of the device for retrieval, each of the plurality of struts being connected to another strut at a pivotal joint, each pivotal joint being configured to allow the respective struts to fold between the collapsed state and the deployed state;

an expandable body distally extending from the reticulation portion along an outer diameter for treatment of the stenotic lesion, the expandable body being configured to expand in the deployed state and collapsed in the collapsed state of the reticulation portion for retrieval; and

a retrieval stem extending proximally from the reticulation portion for retrieval of the device in the collapsed state;

singly folding each of the struts about each pivotal joint to collapse the reticulation portion in the collapsed state; and

retracting the stent in the outer catheter to retrieve the stent from the body vessel.