STENT LOADING AND DELIVERY DEVICE HAVING A LOADING BASKET LOCK MECHANISM

• US 20150073528A1
• Filed: 11/13/2014
• Published: 03/12/2015
• Est. Priority Date: 12/30/2010
• Status: Active Grant

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Inventors: Schneider, Eric M., Bean, Jeffrey V., Hollett, Andrew Kendall
• Granted Patent: US 9,265,639 B2
• Time in Patent Office: Days
• US Class Current: 623/1.12
• 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 2/9522 Means for mounting a stent or stent-graft onto or into a placement instrument
• 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 2002/9505 having retaining means other than an outer sleeve, e.g. male-female connector between stent and instrument
• CPC Class Codes: A61F 2002/9534 for repositioning of stents
• CPC Class Codes: A61F 2002/9665 with additional retaining means
• CPC Class Codes: A61F 2250/009 for single use, e.g. having means for preventing re-use

Abstract

A stent loading and delivery system, the delivery system comprising an inner elongate tubular member having a proximal end and a distal end, an intermediate elongate tubular member having a proximal end and a distal end in sliding relationship to said inner elongate tubular member and an external elongate tubular member having a proximal end and a distal end in sliding relationship to said intermediate elongate tubular member, said intermediate elongate tubular member comprising a stop mechanism at its proximal end, wherein the stop mechanism prevents the external elongate tubular member from being slid past the stop mechanism when the external elongate tubular member is slid in a proximal direction.

Claims

1. A stent loading and delivery system, the delivery system comprising:

an inner elongate tubular member having a proximal end and a distal end, an intermediate elongate tubular member having a proximal end and a distal end in sliding relationship to said inner elongate tubular member and an external elongate tubular member having a proximal end and a distal end in sliding relationship to said intermediate elongate tubular member, said intermediate elongate tubular member comprising a stop mechanism at its proximal end and disposed about the circumference of the intermediate elongate tubular member, the stop mechanism having an unexpanded state and an expanded state, the stop mechanism in the expanded state prevents the external elongate tubular member permanently from moving in a proximal direction to a point beyond the stop mechanism.

2. The stent loading and delivery device of claim 1 wherein the stop mechanism in the expanded state takes on a frustoconical shape.

3. The stent loading and delivery device of claim 1 wherein the stop mechanism comprises flanges, tabs, or pleats.

4. The stent loading and delivery device of claim 1 wherein the inner elongate tubular member comprises a proximal handle at the proximal end, the intermediate elongate tubular member comprises an intermediate handle at the proximal end and the external elongate tubular member comprises a distal handle at the proximal end, the distal handle has proximal a position and a distal position, when the distal handle is in the proximal position, the external elongate tubular member overlies the stop mechanism.

5. The stent loading and delivery device of claim 4, the stop mechanism having an unexpanded and an expanded configuration, when the external elongate tubular member overlies the stop mechanism the stop mechanism is in its unexpanded configuration.

6. The stent loading and delivery device of claim 3 wherein when the external elongate tubular member is in its distal position, the stop mechanism is in its expanded configuration and when the distal handle of the external elongate tubular member is adjacent the expanded stop mechanism, the external elongate tubular member cannot be moved further in a proximal direction.

7. The stent loading and delivery device of claim 1 further comprising a stent loading basket, the stent loading basket is secured to the distal end of the intermediate elongate tubular member.

8. The stent loading and delivery device of claim 7 in combination with a stent having an unconstrained state and a constrained state and having a proximal end and a distal end, the proximal end of the stent is disposed within the stent loading basket.

9. The stent loading and delivery device of claim 8 wherein when the external elongate tubular member is in the distal position the stent loading basket and stent in a constrained state are within the distal end of the external elongate tubular member

10. The stent loading and delivery device of claim 9 wherein when the external elongate tubular member is adjacent the stop mechanism, the stent is outside of the external elongate tubular member in an unconstrained state and the stent loading basket is within the external elongate tubular member.

11. The stent loading and delivery device of claim 1 wherein the external elongate tubular member has a distal end and a proximal end, the proximal end of the external elongate tubular member has a proximal position and a distal position, when the external elongate tubular member is in its proximal position the external elongate tubular member overlies the stop mechanism which is in a constrained state and when the external elongate tubular member is in its distal position the stop mechanism is exposed in an unconstrained state.

12. The stent loading and delivery device of claim 1 wherein the stop mechanism has an unexpanded and an expanded state and the stop mechanism has a braided construction.

13. The stent loading and delivery device of claim 1 wherein the stop mechanism comprises a compressible bump or sleeve disposed about the circumference of the elongate intermediate member.

14. A stent loading and delivery system comprising:

an inner elongate tubular member having a proximal end and a distal end, the inner elongate tubular member having a proximal handle at the proximal end of the inner elongate tubular member;

an intermediate elongate tubular member in sliding relationship with the inner elongate tubular member, the intermediate elongate tubular member having a proximal end and a distal end, the intermediate elongate tubular member having an intermediate handle, the intermediate handle having a first position and a second position, in the second position the intermediate handle is adjacent the proximal handle;

an external elongate tubular member having a proximal end and a distal end, the external elongate tubular member overlying at least a portion of the intermediate elongate tubular member and in sliding relationship therewith, the external elongate tubular member having a distal handle at the proximal end of the elongate external tubular member, the distal handle having a proximal position and a distal position; and

a stop mechanism disposed about the circumference at the proximal end of the intermediate elongate tubular member at a point corresponding to the proximal position of the intermediate handle of the intermediate elongate tubular member, the stop mechanism having a first unexpanded state and a second expanded state;

wherein when the distal handle of the external elongate tubular member is in the first proximal position, the proximal end of the external elongate tubular member overlies the stop mechanism and the stop mechanism is in its unexpanded state and when the distal handle of the external elongate tubular member is in the second distal position, the stop mechanism is exposed and is in its expanded state, the stop mechanism in its expanded state prevents the distal handle and external elongate tubular member permanently from moving to a point beyond the stop mechanism.

15. The stent loading and delivery system of claim 14 further comprising a stent loading basket, the stent loading basket is secured to the distal end of the intermediate elongate tubular member adjacent the distal end of the external elongate tubular member.

16. The stent loading and delivery system of claim 15 in combination with a stent, the stent having an unconstrained and a constrained state and a distal end and a proximal end, the proximal end of the stent is disposed within the stent loading basket in an unconstrained state when the distal handle of the external elongate tubular member is in its proximal position and when the handle of the external elongate tubular member is in its distal position, the stent loading basket and the stent are in the distal end of the external elongate tubular member.

17. The stent loading and delivery system of claim 16 wherein when the distal handle of the external elongate tubular member is returned to the proximal position adjacent the stop mechanism the stent is outside the distal end of the external elongate tubular member in an unconstrained state and the stent loading basket is within the distal end of the external elongate tubular member in a constrained state.

18. The stent loading and delivery system of claim 14 wherein the stop mechanism expands to form a frustoconical cone.

19. The stent loading and delivery system of claim 14 wherein the stop mechanism comprises flanges, tabs or pleats.

20. The stent loading and delivery system of claim 14 wherein the stop mechanism is formed from at least one member selected from the group consisting of polymers, flexible metals and shape memory metals.