STENTS AND STENT DEPLOYMENT DEVICES

• US 20170172774A1
• Filed: 12/07/2016
• Published: 06/22/2017
• Est. Priority Date: 12/17/2015
• Status: Active Grant

• Current Assignee: Covidien LP (Medtronic Plc)
• Original Assignee: Covidien LP (Medtronic Plc)
• Inventors: Hodgkinson, Gerald, Marczyk, Stanislaw, Racenet, David, Kostrzewski, Stanislaw, Pribanic, Russell
• Granted Patent: US 10,420,661 B2
• Time in Patent Office: Days
• CPC Class Codes: A61F 2/04 Hollow or tubular parts of organs, e.g. bladders, tracheae, bronchi or bile ducts A61F2/18, A61F2/20 take precedence; devices, other than stent-grafts, providing patency to, or preventing collapsing of, tubular structures of the body other than stent-grafts, e.g. stents A61F2/82; instruments specially adapted for placement or removal of stents or stent-grafts A61F2/95
• CPC Class Codes: A61F 2/07 Stent-grafts
• CPC Class Codes: A61F 2/82 Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents stent-grafts for tubular structures of the body other than blood vessels A61F2/04; stent-grafts for blood vessels A61F2/07; instruments specially adapted for placement or removal of stents or stent-grafts A61F2/95; for closing wounds, or holding wounds closed A61B17/04 - A61B17/115; dilators A61M29/00
• CPC Class Codes: A61F 2/848 having means for fixation to the vessel wall, e.g. barbs
• CPC Class Codes: A61F 2/915 with bands having a meander structure, adjacent bands being connected to each other
• CPC Class Codes: A61F 2/92 Stents in the form of a rolled-up sheet expanding after insertion into the vessel , e.g. with a spiral shape in cross-section
• CPC Class Codes: A61F 2/95 Instruments specially adapted for placement or removal of stents or stent-grafts
• CPC Class Codes: A61F 2/9517 handle assemblies therefor
• CPC Class Codes: A61F 2002/041 Bile ducts
• CPC Class Codes: A61F 2002/044 Oesophagi or esophagi or gullets
• CPC Class Codes: A61F 2002/045 Stomach, intestines

Abstract

A method of deploying a stent includes receiving a delivery system loaded with a stent and securing the stent in a compressed arrangement by a stent holding assembly including first and second holders having a first protective cover disposed at one end for enclosing a first fastening assembly and a second protective cover disposed at one end of the second holder for enclosing a second fastening assembly, respectively, the stent coupled to the first and second holders members by the first and second fastening assemblies, respectively. The method further includes delivering the stent in an axially expanded and a radially compressed arrangement to an implantation site, retracting the first and second protective covers to expose the first and second fastening assemblies, and actuating the first and second fastening assemblies such that the stent radially expands to engage an inner wall of a lumen.

Claims

1. A stent deployment system, comprising:

a handle body;

a stent holding assembly including a first holder and a second holder, the stent holding assembly connected to the handle body, wherein the first holder is connected to the second holder via a shaft defining a longitudinal axis such that the first and second holders are substantially aligned with the longitudinal axis;

a stent having a proximal end and a distal end, the stent secured to the stent holding assembly such that at least a portion of the stent holding assembly is confined within the stent;

a first protective cover disposed at one end of the first holder, the first protective cover configured to enclose a first fastening assembly; and

a second protective cover disposed at one end of the second holder, the second protective cover configured to enclose a second fastening assembly.

2. The stent deployment system according to claim 1, wherein each of the first and second fastening assemblies includes a plurality of anchors mounted on distal ends of extensions, the extensions separated from each other by gaps.

3. The stent deployment system according to claim 2, wherein the first and second fastening assemblies are exposed upon removal of the first and second protective covers, respectively.

4. The stent deployment system according to claim 3, wherein the first holder includes a first sleeve and the second holder includes a second sleeve, the first and second sleeves removed before deployment of the first and second fastening assemblies.

5. The stent deployment system according to claim 4, wherein, upon removal of the first and second sleeves, the extensions of each of the first and second fastening assemblies are actuated to extend away from the first and second holders to engage a lumen.

6. The stent deployment system according to claim 5, wherein the stent is positioned within the lumen in an axially expanded configuration.

7. The stent deployment system according to claim 6, wherein, when the first and second fastening assemblies are actuated to extend away from the first and second holders, the stent secured thereon deforms to a radially expanded configuration.

8. The stent deployment system according to claim 1, wherein the first and second holders are independently driven.

9. The stent deployment system according to claim 1, wherein each of the first and second holders is a substantially cylindrical enclosure, where the respective first and second fastening assemblies are circumferentially positioned therein.

10. The stent deployment system according to claim 1, wherein each of the first and second fastening assemblies is a coiled anchoring ring having a plurality of projections disposed on an outer surface thereof.

11. The stent deployment system according to claim 10, wherein the coiled anchoring ring of each of the first and second fastening assemblies is mounted around a balloon.

12. A method of deploying a stent to an implantation site, the method comprising:

receiving a delivery system loaded with a stent;

securing the stent in a compressed arrangement by a stent holding assembly including a first holder and a second holder, the first holder having a first protective cover disposed at one end for enclosing a first fastening assembly therein and a second protective cover disposed at one end of the second holder for enclosing a second fastening assembly therein, the stent coupled to the first and second holders by the first and second fastening assemblies, respectively;

delivering the stent in an axially expanded and a radially compressed arrangement through a bodily lumen and to the implantation site via the delivery system;

retracting the first and second protective covers to expose the first and second fastening assemblies; and

actuating the first and second fastening assemblies to extend away from the first and second holders, respectively, such that the stent radially expands to engage an inner wall of the bodily lumen.

13. The method according to claim 12, further comprising connecting the first holder to the second holder via a shaft defining a longitudinal axis such that the first and second holders are substantially aligned with the longitudinal axis.

14. The method according to claim 12, further comprising confining at least a portion of the stent holding assembly within the stent.

15. The method according to claim 12, wherein each of the first and second fastening assemblies includes a plurality of anchors mounted on distal ends of extensions, the extensions separated from each other by gaps.

16. The method according to claim 15, further comprising independently driving the first and second holders.

17. The method according to claim 12, further comprising providing a first sleeve over the first holder and a second sleeve over the second holder.

19. The method according to claim 12, further comprising forming each of the first and second holders as substantially cylindrical enclosures, where the respective first and second fastening assemblies are circumferentially positioned therein.

20. The method according to claim 12, wherein each of the first and second fastening mechanisms is a coiled anchoring ring having a plurality of projections disposed on an outer surface thereof, the coiled anchoring ring of each of the first and second fastening assemblies mounted around a balloon.

18. The method according to claim 18, further comprising removing the first and second sleeves before deployment of the first and second fastening assemblies.