Medical device delivery systems

• US 9,277,993 B2
• Filed: 12/14/2012
• Issued: 03/08/2016
• Est. Priority Date: 12/20/2011
• Status: Active Grant

• Current Assignee: Boston Scientific Scimed, Inc. (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Scimed, Inc. (Boston Scientific Corporation)
• Inventors: Gamarra, Randy, Tung, David, Paul, David J.
• Primary Examiner(s): NGUYEN, TUAN VAN
• Application Number:
  US13/714,860
• Publication Number:
  US 20130158653A1
• Time in Patent Office: 1,180 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: A61F 2/2418 Scaffolds therefor, e.g. support stents
• CPC Class Codes: A61F 2/2436 Deployment by retracting a sheath
• CPC Class Codes: A61F 2/9517 handle assemblies therefor
• CPC Class Codes: A61F 2210/0057 stretchable
• CPC Class Codes: A61M 2025/0004 having two or more concentrically arranged tubes for forming a concentric catheter system
• CPC Class Codes: A61M 2025/0175 having telescopic features, interengaging nestable members movable in relations to one another
• CPC Class Codes: A61M 2025/0681 Systems with catheter and outer tubing, e.g. sheath, sleeve or guide tube
• CPC Class Codes: A61M 25/0012 with embedded structures, e.g. coils, braids, meshes, strands or radiopaque coils
• CPC Class Codes: A61M 25/0074 Dynamic characteristics of the catheter tip, e.g. openable, closable, expandable or deformable
• CPC Class Codes: A61M 25/0108 using radio-opaque or ultrasound markers
• CPC Class Codes: F04C 2270/0421 Controlled or regulated

Abstract

Medical device delivery systems and methods for making and using medical device delivery systems are disclosed. An example medical device delivery system may include an outer sheath. An inner catheter may be disposed within the outer sheath. The inner catheter may have a distal end. A tube extension may be coupled to the distal end of the inner catheter and may extend distally therefrom. The tube extension may be configured to shift between a first elongated configuration and a second shortened configuration.

Claims

1. A medical device delivery system, comprising:

an outer sheath;

an inner catheter disposed within the outer sheath, the inner catheter having a distal end;

a tube extension coupled to the distal end of the inner catheter and extending distally therefrom to an attached distal nose cone; and

a valve implant releasable coupled to the inner catheter;

wherein the tube extension is configured to shift between a first elongated configuration and a second shortened configuration;

wherein the outer sheath is configured to shift the nose cone and attached tube extension between the first elongated configuration and the second shortened configuration of the tube extension.

2. The system of claim 1, wherein the tube extension includes a coil.

3. The system of claim 2, wherein the coil has an open pitch when the tube extension is in the first elongated configuration and the coil has a closed pitch when the tube extension is in the second shortened configuration.

4. The system of claim 1, wherein the tube extension includes a resilient polymer.

5. The system of claim 4, wherein the resilient polymer has a first thickness when the tube extension is in the first elongated configuration and the resilient polymer has a second thickness greater than the first thickness when the tube extension is in the second shortened configuration.

6. The system of claim 1, wherein the tube extension includes a tubular member having a plurality of slots formed therein.

7. The system of claim 6, wherein at least some of the slots are open when the tube extension is in the first elongated configuration and wherein at least some of the slots are closed when the tube extension is in the second shortened configuration.

8. The system of claim 1, wherein the valve implant includes a replacement aortic valve.