Catheter guide wire especially for percutaneous transluminal coronary angioplasty

• US 20050267385A1
• Filed: 05/10/2005
• Published: 12/01/2005
• Est. Priority Date: 05/10/2004
• Status: Active Grant

• Current Assignee: Biotronik AG (Biotronik SE & Company KG)
• Original Assignee: Restate Patent AG
• Inventors: Hofmann, Eugen, Wintsch, Christoph
• Granted Patent: US 7,699,792 B2
• Time in Patent Office: Days
• US Class Current: 600/585
• CPC Class Codes: A61M 2025/09166 having radio-opaque features
• CPC Class Codes: A61M 25/0108 using radio-opaque or ultrasound markers
• CPC Class Codes: A61M 25/09 Guide wires

Abstract

A catheter guide wire, especially for percutaneous transluminal coronary angioplasty, comprises an elongated wire shaft of a flexible material having a proximal and a distal end and disposed on the wire shaft at least one radiopaque, sleeve-like marker adjacent to the distal end. The at least one marker is disposed on a core section of the wire shaft, said core section being widened in its diameter relative to the diameter of the adjoining shaft sections.

Claims

1. A catheter guide wire, especially for percutaneous transluminal coronary angioplasty, comprising

an elongated wire shaft (2) of a flexible material, especially stainless steel, having a proximal and a distal end (3, 5),

disposed on the wire shaft (2) at least one radiopaque sleeve-like marker (9) adjacent to the distal end (3), wherein the at least one marker (9) is disposed on a core section (8) of the wire shaft (2), said core section (8) having a diameter (D_K) being widened in its diameter (D_K) relative to a diameter (D_E) of shaft sections (12) adjoining to the core section (8).

2. A catheter guide wire according to claim 1, wherein the core section (8) transitions on both sides in each case in a conically implemented, ramp-like annular shoulder (11) into the adjoining shaft section (12).

3. A catheter guide wire according to claim 1, wherein the diameter-widened core sections (8) are formed for each marker (9) by grinding down the wire shaft (2) in a region around both sides of the respective core section (8).

4. A catheter guide wire according to claim 1, wherein the at least one marker (9) is implemented as a wire coil disposed on the given core section (8), and wherein the respective wire coil is secured on the core section (8) by means of a solder bed (10), which tapers off at its two ends in each case in a frusto-conical ramp (13) toward the adjoining, diameter-reduced shaft section (12).

5. A catheter guide wire according to claim 2, wherein the annular shoulder (11) of a respective core section (8) and the conical ramp (13) of a respective solder bed (10) are flush with one another in a longitudinal axis direction.

6. A catheter guide wire according to claim 1, wherein adjacent to the distal end (5) of the wire shaft (2), said distal end (5) being provided with an elongated marker coil (14), three markers (9) are disposed at a distance (a) from one another.

7. A catheter guide wire according to claim 6, wherein the ratio of the length (l) of each marker (9) to the spacing (a) between them is approximately 1:

10.

8. A catheter guide wire according to claim 1, wherein an outside diameter (D_M) of the at least one marker (9) is slightly smaller than an outside diameter (D_W) of an elongated marker coil (14) at the distal end (5) of the wire shaft (2).

9. A catheter guide wire according to claim 1, wherein the surface of the guide wire (1) with its wire shaft (2) and the at least one marker (9) with the solder bed (10) is smoothed, especially ground and polished.

10. A catheter guide wire according to claim 1, comprising a friction-reducing coating on the guide wire (1).