Coaxial Guide Catheter for Interventional Cardiology Procedures

• US 20100324567A1
• Filed: 06/28/2010
• Published: 12/23/2010
• Est. Priority Date: 05/03/2006
• Status: Active Grant

• Current Assignee: Teleflex Life Sciences LLC (Teleflex Incorporated)
• Original Assignee: Vascular Solutions Incorporated
• Inventors: Root, Howard, Sutton, Gregg, Garrity, Jason M., Welch, Jeffrey M.
• Granted Patent: US 8,142,413 B2
• Time in Patent Office: Days
• US Class Current: 606/108
• CPC Class Codes: A61M 2025/0081 Soft tip
• 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 25/0051 made from fenestrated or weakened tubing layer
• CPC Class Codes: A61M 25/0052 Localized reinforcement, e.g. where only a specific part of the catheter is reinforced, for rapid exchange guidewire port
• 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 25/0069 Tip not integral with tube
• 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 25/0662 Guide tubes

Abstract

A coaxial guide catheter to be passed through guide catheter having a first lumen, for use with interventional cardiology devices that are insertable into a branch artery that branches off from a main artery. The coaxial guide catheter is extended through the lumen of the guide catheter and beyond the distal end of the guide catheter and inserted into the branch artery. The device assists in resisting axial and shear forces exerted by an interventional cardiology device passed through the second lumen and beyond the flexible distal tip portion that would otherwise tend to dislodge the guide catheter from the branch artery.

Claims

1. A method of providing backup support for an interventional cardiology device for use in the coronary vasculature, the interventional cardiology device being adapted to be passed through a guide catheter, the method comprising:

inserting the guide catheter into the first blood vessel, the guide catheter having a first lumen and a distal end;

positioning the distal end of the guide catheter in a second blood vessel that branches off from the first blood vessel;

inserting a coaxial guide catheter over the guidewire and into the first lumen of the guide catheter, the coaxial guide catheter having a second lumen and

a flexible distal tip portion,

a reinforced portion proximal to the distal tip portion, and

a substantially rigid portion proximal to the reinforced portion, the substantially rigid portion having an opening along a side thereof,

advancing the distal tip portion of the coaxial guide catheter into the second blood vessel such that the flexible distal tip portion and at least a portion of the reinforced portion extend out of the distal end of the guide catheter and into the second blood vessel; and

inserting the interventional cardiology device through the lumen of the coaxial guide catheter and into contact with or past a lesion in the second blood vessel.

2. The method as claimed in claim 1, further comprising applying a force to a proximal portion of the coaxial guide catheter such that the distal tip portion of the coaxial guide catheter remains seated in the second blood vessel in response to an opposing backward force exerted by the interventional cardiology device.

3. The method as claimed in claim 1, further comprising:

keying the tapered inner catheter to the coaxial guide catheter at a proximal portion thereof;

inserting a guidewire having a tip into a first blood vessel; and

inserting the tip of the guidewire into a second blood vessel that branches off of the first blood vessel.

4. The method as claimed in claim 1, further comprising selecting the substantially rigid portion of the coaxial guide catheter such that it comprises a cylindrical portion and a partially cylindrical portion defining the opening along a side thereof.

5. The method as claimed in claim 1, further comprising selecting the guide catheter to further comprise a Y-adapter and the method further comprising injecting a fluid through the Y-adapter into the second lumen.

6. The method as claimed in claim 1, further comprising inserting a guidewire having a tip into a first blood vessel;

and

inserting the tip of the guidewire into a second blood vessel that branches off of the first blood vessel.

7. The method as claimed in claim 6, further comprising placing a tapered inner catheter inside the second lumen of the coaxial guide catheter, the tapered inner catheter including a tapered distal portion, the tapered distal portion being positioned to extend beyond the distal tip of the coaxial guide catheter;

removing the tapered inner catheter from the coaxial guide catheter; and

removing the guidewire from the coaxial guide catheter.

8-20. -20. (canceled)