Stent Delivery System

• US 20180140446A1
• Filed: 04/29/2016
• Published: 05/24/2018
• Est. Priority Date: 04/29/2015
• Status: Active Grant

• Current Assignee: Micro Medical Solutions, Inc.
• Original Assignee: Micro Medical Solutions, Inc.
• Inventors: Sullivan, Gregory, Shia, Benedict
• Granted Patent: US 11,123,207 B2
• Time in Patent Office: Days
• CPC Class Codes: A61B 17/221 Gripping devices in the form of loops or baskets for gripping calculi or similar types of obstructions surgical snare instruments A61B17/32056
• CPC Class Codes: A61B 2017/22035 for retrieving or repositioning foreign objects
• CPC Class Codes: A61B 2017/2215 having an open distal end
• CPC Class Codes: A61F 2/95 Instruments specially adapted for placement or removal of stents or stent-grafts
• CPC Class Codes: A61F 2/9525 using a funnel
• CPC Class Codes: A61F 2/966 with relative longitudinal movement between outer sleeve and prosthesis, e.g. using a push rod
• CPC Class Codes: A61F 2002/9528 for retrieval of stents
• CPC Class Codes: A61F 2002/9534 for repositioning of stents
• CPC Class Codes: A61F 2002/9665 with additional retaining means
• CPC Class Codes: A61F 2250/0096 Markers and sensors for detecting a position or changes of a position of an implant, e.g. RF sensors, ultrasound markers
• CPC Class Codes: A61F 2250/0098 radio-opaque, e.g. radio-opaque markers

Abstract

A stent delivery system, which includes a catheter and a stent stabilizer and pusher mechanism to capture and deploy a braided stent. The stabilizer pusher mechanism has a reinforced polymer shaft with two ends, a hub, a marker band and a braided mesh sock. The stent stabilizer and pusher mechanism further possesses a reinforced polymer shaft, which is constructed to have a low friction lumen. The low friction lumen may be guide wire compatible.

Claims

1. A stent delivery system comprising:

a catheter, wherein the catheter further comprises;

a polymer shaft, wherein the shaft comprises a proximal end and a distal end; and

a catheter hub;

a stent stabilizer and pusher mechanism located within the catheter, wherein the stent stabilizer and pusher mechanism further comprises;

a reinforced polymer shaft, wherein the polymer shaft comprises a proximal end and a distal end;

a pusher hub;

a marker band; and

a braided mesh sock; and

a stent mechanism, wherein the stent mechanism is engaged by the braided mesh sock.

2. The stent delivery system of claim 1, wherein reinforced polymer shaft of the stent stabilizer and pusher mechanism further comprises a low friction lumen.

3. The stent delivery system of claim 2, wherein the low friction lumen is guide wire compatible.

4. The stent delivery system of claim 1, wherein the pusher hub is attached to the proximal end of the reinforced polymer shaft of the stent stabilizer and pusher mechanism

5. The stent delivery system of claim 1, wherein the braided mesh stock is attached to the distal end of the reinforced polymer shaft of the stent stabilizer and pusher mechanism.

6. The stent delivery system of claim 1, wherein the mesh sock comprises a constrained end and an unconstrained end.

7. The stent delivery system of claim 1, wherein the braided mesh sock is constrained at the distal end of the reinforced polymer shaft of the stent stabilizer and pusher mechanism underneath the marker band.

8. The stent delivery system of claim 1, wherein the stent mechanism is held butted against an inside of the mesh sock.

9. The stent delivery system of claim 1, wherein the braided sock hangs over the distal end of the reinforced polymer shaft.

10. The stent delivery system of claim 1, wherein the braided mesh sock comprises a configuration of braiding wires.

11. The stent delivery system of claim 10, wherein the configuration of braiding wires comprises a set of strands.

12. The stent delivery system of claim 11, wherein the configuration of braiding wires is constructed of a set of 36 strands.

13. The stent delivery system of claim 12, wherein the set of 36 strands comprise a diameter of 0.001″

.

14. The stent delivery system of claim 12, wherein the set of 36 strands comprise nickel titanium.

15. The stent delivery system of claim 11, wherein the set of strands comprises at least one over braid and at least one under braid.

16. The stent delivery system of claim 11, wherein the set of strands comprises at least one over braid and at least one under braid and wherein the braid comprises a braid angle of 120 degrees.

17. The stent delivery system of claim 2, wherein an inner diameter of the low friction lumen is 0.021″

.

18. The stent delivery system of claim 2, wherein the outer diameter of the low friction lumen is about 0.030″

.

19. The stent delivery system of claim 1, wherein a diameter of the mesh sock is 0.5 mm.

20. The stent delivery system of claim 1 wherein a diameter of the mesh sock comprises a heat set diameter.

21. The stent delivery system of claim 20, wherein the heat set diameter is a range of 0.5-1.0 mm larger than the stent to be captured.

22. The stent delivery system of claim 1, wherein the braided mesh sock is collapsible and secures the stent.