Catheter apparatus with telescoping lumen catheters and its use in methods for treating vasculatures

• US 10,130,795 B2
• Filed: 07/30/2015
• Issued: 11/20/2018
• Est. Priority Date: 06/26/2007
• Status: Active Grant

• Current Assignee: Roxwood Medical, Inc. (Boston Scientific Corporation)
• Original Assignee: Roxwood Medical, Inc. (Boston Scientific Corporation)
• Inventors: Farhangnia, Mehrdad, Yang, Mark C., Taber, Mark
• Primary Examiner(s): Eiseman, Adam J
• Application Number:
  US14/813,171
• Publication Number:
  US 20150328433A1
• Time in Patent Office: 1,209 Days
• CPC Class Codes: A61M 2025/0046 Coatings for improving slidability
• CPC Class Codes: A61M 2025/0681 Systems with catheter and outer tubing, e.g. sheath, sleeve or guide tube
• CPC Class Codes: A61M 2025/1045 for treating bifurcations, e.g. balloons in y-configuration, separate balloons or special features of the catheter for treating bifurcations
• CPC Class Codes: A61M 25/0026 Multi-lumen catheters with stationary elements catheter assemblies comprising a catheter in combination with a guide tube, sheath or sleeve A61M2025/0681; catheters comprising telescoping coaxial elements A61M2025/0175
• CPC Class Codes: A61M 25/003 characterized by features relating to least one lumen located at the distal part of the catheter, e.g. filters, plugs or valves catheter tips A61M25/0067
• CPC Class Codes: A61M 25/0068 Static characteristics of the catheter tip, e.g. shape, atraumatic tip, curved tip or tip structure
• CPC Class Codes: A61M 25/0071 Multiple separate lumens multiple separate lumens throughout the catheter A61M25/0026
• CPC Class Codes: A61M 25/0074 Dynamic characteristics of the catheter tip, e.g. openable, closable, expandable or deformable
• CPC Class Codes: A61M 25/008 Strength or flexibility characteristics of the catheter tip
• CPC Class Codes: A61M 25/01 Introducing, guiding, advancing, emplacing or holding catheters A61M25/10 takes precedence
• CPC Class Codes: A61M 25/04 in the body, e.g. expansible A61M25/10, A61M16/0488 take precedence
• CPC Class Codes: A61M 25/09 Guide wires
• CPC Class Codes: A61M 25/1002 characterised by balloon shape A61M25/1006, A61M25/1009 take precedence
• CPC Class Codes: A61M 25/1011 Multiple balloon catheters

Abstract

The invention provides for methods and catheter apparatus for passing one or more guidewires (via the use of one or more telescoping guidewire lumens) through a chronic total occlusion of a vasculature. The catheter apparatus may include: a catheter shaft having a distal end; one or more telescoping guidewire lumen catheters passing longitudinally through the shaft, wherein the one or more guidewire lumen catheters are capable of telescoping beyond the distal end of the catheter shaft; an expansible distal portion of the shaft; and a retractable sheath covering at least a portion of the expansible distal portion of the shaft, wherein retracting the retractable sheath from the expansible distal portion of the shaft directly activates the expansible distal portion of the shaft causing expansion of the expansible distal portion of the shaft.

Claims

1. A method for advancing a guidewire through an obstructed vasculature comprising

inserting a catheter apparatus having a main catheter shaft and one or more telescoping lumen catheter, each telescoping lumen catheter configured for passing over one or more guidewires into an obstructed vasculature;

expanding an expansible support structure on a distal end of the main shaft;

telescoping one or more telescoping lumen catheters in and out of main catheter shaft and through the expanded support structure; and

advancing one or more guidewires through the one or more telescoping lumen catheters and into contact with an obstruction.

2. The method of claim 1, wherein the main catheter shaft has one or more telescoping lumen catheter shafts through which one or more telescoping lumen catheters is passing.

3. The method of claim 1, wherein the support structure is self-expansible.

4. The method of claim 3, wherein the step of expanding the expansible support structure comprises withdrawing a sheath surrounding the support structure.

5. The method of claim 1, wherein the step of telescoping includes telescoping the telescoping lumen catheters out of the main catheter until resistance is felt.

6. The method of claim 1, wherein the method comprises sequentially advancing the one or more telescoping lumen catheters.

7. The method of claim 1, where the one or more telescoping lumen catheter telescope individually.

8. The method of claim 1, wherein the expansible support structure surrounds the one or more telescoping lumen catheters.

9. The method of claim 1, wherein the expansible support structure is configured to be insertable and removable.

10. The method of claim 1, wherein the expansible support structure is non-implantable and removable.