Catheter/guide wire steering apparatus and method

• US 5,916,194 A
• Filed: 05/24/1996
• Issued: 06/29/1999
• Est. Priority Date: 05/24/1996
• Status: Expired due to Term

• Current Assignee: Precision Vascular Systems, Inc. (Boston Scientific Corporation)
• Original Assignee: Sarcos Incorporated (Rtx Corporation)
• Inventors: Jacobsen, Stephen C., Lippert, John
• Primary Examiner(s): Coggins, Wynn Wood
• Assistant Examiner(s): Blyveis, Deborah
• Application Number:
  US08/653,291
• Time in Patent Office: 1,131 Days
• Field of Search: 604/96-102, 604/264, 604/280, 600/192, 600/194
• US Class Current: 604/96.01
• CPC Class Codes: A61M 2025/018 Catheters having a lateral opening for guiding elongated means lateral to the catheter
• CPC Class Codes: A61M 2025/09183 having tools at the distal tip
• CPC Class Codes: A61M 2029/025 characterised by the guiding element
• CPC Class Codes: A61M 25/007 Side holes, e.g. their profiles or arrangements; Provisions to keep side holes unblocked
• CPC Class Codes: A61M 25/01 Introducing, guiding, advancing, emplacing or holding catheters A61M25/10 takes precedence
• CPC Class Codes: A61M 25/0105 Steering means as part of the catheter or advancing means; Markers for positioning systems for detection of markers A61B

Abstract

A catheter/guide wire steering mechanism includes a catheter having a proximal end, a distal end, and sidewalls which define at least the first lumen. An opening is formed in a sidewall of the catheter, near the distal end thereof in communication with the first lumen. A plug is disposed in the catheter at the distal end thereof and includes a curved surface for deflecting and directing out the opening, the leading end of a guide wire (or other catheter) inserted into the lumen at the proximal end of the catheter. This enables guiding the guide wire laterally from the catheter either into a passageway branching from the main passageway into which the catheter is inserted, or to perforate a sidewall of the main passageway.

Claims

1. Catheter/guide wire steering apparatus for directing the catheter/guide wire to a desired location comprising:

a catheter having a proximal end, a distal end, and sidewalls which define at least a first lumen,

an opening in a sidewall of the catheter, near the distal end thereof, in communication with the lumen,

means disposed in the catheter at the distal end thereof for deflecting and directing out the opening, the leading end of a guide wire or catheter, to thereby enable guiding the guide wire laterally from the catheter; and

balloon means disposed on the distal end of the catheter, the balloon means being disposed so as to cause the distal end of the catheter to bend toward the desired location.

2. Apparatus as in claim 1 wherein the distal end of the catheter is shapeable to curve in the direction in which the opening faces.

3. Apparatus as in claim 1 further including a guide wire for insertion into the lumen at the proximal end of the catheter and exit out the opening thereof, said guide wire having a distal end which is curved laterally.

4. Apparatus as in claim 1 wherein said catheter includes a second lumen extending the length of the catheter for expanding the balloon means when liquid is forced into the second lumen, to deflect and force said opening against a sidewall of a vasculature/duct passageway into which the catheter is inserted.

5. Apparatus as in claim 4 wherein said catheter includes a third lumen extending from the proximal end of the catheter to the distal end thereof, beyond the location of the balloon means.

6. Apparatus as in claim 1 wherein said catheter includes a second lumen extending the length of the catheter for receiving a second guide wire to guide the catheter to a target location in a vasculature passageway.

7. Apparatus as in claim 6 wherein the second lumen includes an access opening at the proximal end of the catheter, and wherein the first lumen includes an access opening at the proximal end of the catheter nearer the distal end than the access opening of the second lumen.

8. Apparatus as in claim 7 wherein the access opening of the first lumen includes a luer adapter.

9. Apparatus as in claim 7 further including a torquing chuck disposed about the second lumen.

10. Apparatus as in claim 7 further including a torquing chuck disposed about the first and second lumens.

11. Apparatus as in claim 6 wherein the first lumen has a diameter of from about 0.008 inches to 0.078 inches, and wherein the second lumen has a diameter of from about 0.012 inches to 0.040 inches.

12. Apparatus as in claim 1 further including a radiopaque element disposed at the distal end of the catheter.

13. Apparatus as in claim 1 further including an element disposed at the distal end of the catheter made of a material detectable by MRI.

14. Apparatus as in claim 1 further including a lubricous coating disposed over the exterior of the catheter.

15. Apparatus as in claim 1 further including a lubricious coating disposed over the walls of the lumen.

18. Apparatus as in claim 1 wherein the balloon is disposed forwardly of the opening so as to increase deflection of the distal end of the lumen.

19. Apparatus as in claim 1 wherein the balloon is tapered to be larger forwardly of the opening to thereby increase deflection when the balloon is inflated.

16. Catheter/guide wire steering apparatus for directing the catheter/guide wire to a desired location comprising:

a catheter having a proximal end, a distal end, and sidewalls which define at least a first lumen,

an opening in a sidewall of the catheter, near the distal end thereof, in communication with the lumen,

means disposed in the catheter at the distal end thereof for deflecting and directing out the opening, the leading end of a guide wire or catheter, to thereby enable guiding the guide wire laterally from the catheter; and

balloon means disposed on the distal end of the catheter, the balloon means being disposed so that a greater portion of the balloon is disposed distally of the opening to thereby cause the distal end of the catheter to bend toward the desired location when the balloon is inflated.

17. A method of steering a catheter/guide wire in a vasculature passageway comprising the step of

providing a catheter having a proximal end, a distal end, sidewalls which define at least a first lumen, and an opening in a sidewall near the distal end thereof, in communication with the lumen,

providing a deflecting means in the catheter at a distal end thereof to deflect and direct out the opening the leading end of a guide wire or catheter inserted into the lumen at the proximal end of the catheter,

providing a balloon which is positioned so as to bend the distal end of the catheter when the balloon is inflated, and

inserting a catheter or guide wire into the lumen at the proximal end of the catheter to deflect the leading end of the catheter or guide wire out the opening.

20. The method according to claim 17, wherein the method comprises, more specifically, selectively placing the balloon with respect to the lumen so as to increase the bending of the lumen when the balloon is inflated.

21. The method according to claim 17, wherein the method comprises, more specifically, selecting a catheter having a balloon disposed on the distal tip thereof.

22. The method according to claim 17, wherein the method comprises, more specifically, selecting a catheter with a balloon which is larger distally of the opening.