Catheter delivery system for stent valve

• US 10,709,559 B2
• Filed: 10/13/2015
• Issued: 07/14/2020
• Est. Priority Date: 10/13/2014
• Status: Active Grant

• Current Assignee: Boston Scientific Medical Device Limited (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Limited (Boston Scientific Corporation)
• Inventors: Delaloye, Stephane, Hefti, Jean-Luc, Lombardi, Fabien, Simonin, Pierre
• Primary Examiner(s): Tyson, Melanie R
• Application Number:
  US15/519,092
• Publication Number:
  US 20170224486A1
• Time in Patent Office: 1,736 Days
• CPC Class Codes: A61B 2090/0811 for the position of a particular part of an instrument with respect to the rest of the instrument, e.g. position of the anvil of a stapling instrument
• CPC Class Codes: A61B 2090/3966 Radiopaque markers visible in an X-ray image
• CPC Class Codes: A61B 90/39 Markers, e.g. radio-opaque or breast lesions markers
• CPC Class Codes: A61F 2/2427 Devices for manipulating or deploying heart valves during implantation
• CPC Class Codes: A61F 2/2436 Deployment by retracting a sheath
• 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 2/966 with relative longitudinal movement between outer sleeve and prosthesis, e.g. using a push rod
• CPC Class Codes: A61F 2/97 the outer sleeve being splittable
• CPC Class Codes: A61F 2250/0087 colour-coded
• CPC Class Codes: A61F 2250/0089 coded with symbols, e.g. dots, numbers, letters, words
• CPC Class Codes: A61F 2250/0097 Visible markings, e.g. indicia
• CPC Class Codes: A61F 2250/0098 radio-opaque, e.g. radio-opaque markers
• CPC Class Codes: A61M 25/0108 using radio-opaque or ultrasound markers

Abstract

A delivery catheter for a stent. The delivery catheter may have a distal end and a proximal end. The distal end includes a stent attachment region adapted to receive a stent. The stent may be of the self-expanding type. The catheter further includes a handle at its proximal end and at least one sheath which may at least partially circumferentially cover the stent such as to retain it in a collapsed configuration. The sheath is coupled at its proximal end to an actuator located on the handle portion. The catheter further includes at least one radio-opaque indicator for indicating a rotational orientation of the delivery catheter and/or the stent when observed using medical imaging during implantation of the stent.

Claims

1. A system comprising:

a delivery catheter for a cardiac stent-valve, the delivery catheter comprising;

a stent holder;

tubing carrying the stent holder, the stent holder having a crimp connection to the tubing,

wherein the crimp connection of the stent holder comprises one or more regions having a non-smooth surface and/or non-smooth profile that grips the tubing; and

a stent-valve.

2. The system of claim 1, wherein at least one radio-opaque indicator is rotatably aligned with a commissure of the stent-valve when the stent-valve is loaded within the delivery catheter.

3. The system of claim 2, wherein the commissure is a commissural post section of the stent-valve.

4. The system of claim 1, wherein the stent holder comprises a hub including one or more crimp zones of material having a radial thickness smaller than one or more adjacent non-crimp zones of material, the one or more adjacent crimp zones defining folded or compressed regions.

5. The system of claim 1, wherein the tubing is of plastics material.

6. The system of claim 1, wherein the stent-holder comprises one or more stent attachment regions for attachment to attachment elements of a stent-valve.

7. The system of claim 1, further comprising at least one radio-opaque indicator configured for indicating a rotational orientation of the stent holder, wherein the at least one radio-opaque indicator is at least one of:

non-integral with the stent holder;

distinct from the stent holder;

spaced from the stent holder;

carried by the tubing independently of the stent holder;

made of a material different from the stent holder.

8. The system of claim 7, wherein at least one radio-opaque indicator comprises a first feature that is substantially elongate in an axial direction of the delivery catheter.

9. The system of claim 8, further comprising a second feature that is substantially elongate in an axial direction of the delivery catheter.

10. The system of claim 9, wherein the second feature is distinct from the first feature by one or more of:

being spaced angularly from the first feature;

being spaced angularly from the first feature by about 90 degrees;

being spaced axially from the first feature;

having a size different from the first feature;

having a length different from the first feature.

11. The system of claim 10, further comprising a sleeve carrying the first feature and the second feature, the sleeve being distinct from a stent holder of the delivery catheter.