Rapid exchange catheter with external wire lumen

• US 5,549,556 A
• Filed: 11/19/1992
• Issued: 08/27/1996
• Est. Priority Date: 11/19/1992
• Status: Expired due to Fees

• Current Assignee: Medtronic Incorporated (Medtronic Plc)
• Original Assignee: Medtronic Incorporated (Medtronic Plc)
• Inventors: Ndondo-Lay, Robert, Rupp, Garry E.
• Primary Examiner(s): MCDERMOTT, CORRINE MARIE
• Application Number:
  US07/979,094
• Time in Patent Office: 1,377 Days
• Field of Search: 606/191, 606/192, 606/194, 604/96, 604/280, 604/282
• US Class Current: 604/103.1
• CPC Class Codes: A61M 2025/0063 having means, e.g. stylets, mandrils, rods or wires to reinforce or adjust temporarily the stiffness, column strength or pushability of catheters which are already inserted into the human body
• CPC Class Codes: A61M 2025/0177 having external means for receiving guide wires, wires or stiffening members, e.g. loops, clamps or lateral tubes
• CPC Class Codes: A61M 2025/0183 Rapid exchange or monorail catheters
• CPC Class Codes: A61M 25/104 used for angioplasty

Abstract

A catheter formed of an elongated shaft with a dilatation balloon at the distal end includes a guide wire lumen external to the balloon. The guidewire lumen extends from the distal tip of the catheter to a proximal port distal from the proximal end of the catheter. The shaft is formed of a proximal hypotube and a distal spring coil. In some embodiments, the wire lumen extends the full length of the catheter and includes apertures for drug delivery or perfusion. A core wire is included to enhance the pushability of the catheter and support the balloon.

Claims

1. A catheter comprising:

an elongated shaft having a proximal and a distal end the shaft is comprised of a hypotube at its proximal end and a spring coil at its distal end, the shaft defining a lumen;

a balloon having a distal and proximal end, the balloon disposed at the distal end of the shaft and sealed thereto so that the balloon is in fluid communication with the lumen;

a sleeve defining a second lumen, the sleeve extending proximally from the distal end of the catheter exterior to the balloon, for slidingly receiving a guidewire; and

a core wire extending through the interior of the balloon from the distal end of the balloon to a point proximal to the balloon to provide added support to the catheter and to the balloon.

2. A catheter comprising:

an elongated shaft having a proximal and a distal end, the shaft is comprised of a hypotube, the shaft defining a lumen;

a balloon having a distal and proximal end, the balloon disposed at the distal end of the shaft and sealed thereto so that the balloon is in fluid communication with the lumen;

a sleeve defining a second lumen, the sleeve extending proximally from the distal end of the catheter exterior to the balloon, for slidingly receiving a guidewire; and

a core wire extending through the interior of the balloon from the distal end of the balloon to a point proximal to the balloon to provide added support to the catheter and to the balloon.

3. A catheter comprising:

an elongated shaft having a proximal and a distal end, the shaft is comprised of a spring coil, the shaft defining a lumen;

a balloon having a distal and proximal end, the balloon disposed at the distal end of the shaft and scaled thereto so that the balloon is in fluid communication with the lumen;

a sleeve defining a second lumen, the sleeve extending proximally from the distal end of the catheter exterior to the balloon, for slidingly receiving a guidewire; and

a core wire extending through the interior of the balloon from the distal end of the balloon to a point proximal to the balloon to provide added support to the catheter and to the balloon.

4. A catheter comprising:

an elongated shaft having a proximal and distal end, the shaft defining a lumen;

a balloon having a distal and proximal end, the balloon disposed at the distal end of the shaft and sealed thereto so that the balloon is in fluid communication with the lumen;

a sleeve defining a second lumen, the sleeve extending proximally from the distal end of the catheter exterior to the balloon, for slidingly receiving a guidewire, the sleeve being slit longitudinally for easy removal of the guidewire; and

a core wire extending through the interior of the balloon from the distal end of the balloon to a point proximal to the balloon to provide added support to the catheter and to the balloon.

5. A catheter comprising:

an elongated shaft having a proximal and distal end, the shaft defining a lumen;

a balloon having a distal and proximal ends, the balloon disposed at the distal end of the shaft and sealed thereto so that the balloon is in fluid communication with the lumen;

a sleeve defining a second lumen, the sleeve extending proximally from the distal end of the catheter exterior to the balloon, for slidingly receiving a guidewire, the sleeve containing apertures for drug delivery or perfusion; and

core wire extending through the interior of the balloon from the distal end of the balloon to a point proximal to the balloon to provide added support to the catheter and to the balloon.