Rapid withdrawal catheter

• US 5,520,647 A
• Filed: 07/02/1993
• Issued: 05/28/1996
• Est. Priority Date: 07/02/1993
• Status: Expired due to Term

• Current Assignee: Cordis Corporation (Cardinal Health, Inc.)
• Original Assignee: Pameda N.V.
• Inventors: Solar, Ronald J.
• Primary Examiner(s): MCDERMOTT, CORRINE MARIE
• Application Number:
  US08/087,428
• Time in Patent Office: 1,061 Days
• Field of Search: 604/96, 604/101, 604/160, 604/161, 604/280, 604/282, 604/102, 606/192, 606/194, 128/772
• US Class Current: 604/102.02
• 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 2025/0183 Rapid exchange or monorail catheters
• CPC Class Codes: A61M 25/104 used for angioplasty

Abstract

This invention is directed to a balloon dilatation catheter which comprises (i) a first, inflation lumen extending therethrough and having distal and proximal ends, the distal end of said first lumen opening into and being in fluid communication with the interior of an expandable dilatation balloon having distal and proximal ends, and (ii) a second lumen extending coextensively with the first lumen and having proximal and distal portions, wherein the proximal portion of the second lumen has an opening adjacent or distal to the proximal end of the first lumen, the distal section of the second lumen is exterior to the balloon, the distal end of the second lumen is open, and the second lumen is capable of receiving a guidewire in a sliding fit. The proximal end of the guidewire may have a removedly mounted slitter, and optionally there may be a hub means in fluid communication with the distal end of the second lumen.

Claims

1. A method for removing a balloon from a blood vessel dilatation catheter of a balloon dilatation catheter system, wherein the balloon dilatation catheter system comprises:

a catheter shaft which defines a first inflation lumen and a second lumen, said catheter shaft having proximal and distal portions,

an inflatable dilatation balloon sealingly connected to said catheter shaft,

a pushing wire that extends within said catheter shaft, and

a guidewire,

wherein the first lumen extends through the length of said catheter shaft and has distal and proximal ends, said distal end opening into and being in fluid communication with the interior of said inflatable dilatation balloon, and

wherein the second lumen extends coextensively with said first lumen and has proximal and distal portions, said proximal portion of said second lumen having an opening distal to the proximal end of said first lumen, said distal section of said second lumen being exterior to said inflatable dilatation balloon, said distal end of

said second lumen being open, and said second lumen receiving the guidewire in a sliding fit,

said method comprising the steps of;

(a) attaching a slitting means to the guidewire, wherein said catheter extends distally into a patient'"'"'s blood vessel;

(b) causing the guidewire to remain stationary; and

(c) pulling the balloon dilatation catheter in the proximal direction to cause the lumen in which the guidewire is contained to open, thus permitting removal of the balloon dilatation catheter while leaving the guidewire in place.

2. A method for removing from a blood vessel a balloon dilatation catheter of a balloon dilatation catheter system, wherein the balloon dilatation catheter system comprises:

a catheter shaft which defines a first inflation lumen and a second lumen, said catheter shaft having proximal and distal portions,

an inflatable dilatation balloon sealingly connected to said catheter shaft,

a pushing wire that extends within said catheter shaft, and

a guidewire,

wherein the first lumen extends through the length of said catheter shaft and has distal and proximal ends, said distal end opening into and being in fluid communication with the interior of said inflatable dilatation balloon, and

wherein the second lumen extends coextensively with said first lumen and has proximal and distal portions, said proximal portion of said second lumen having an opening distal to the proximal end of said first lumen, said distal section of said second lumen being exterior to said inflatable dilatation balloon, said distal end of said second lumen being open, said second lumen receiving the guidewire in a sliding fit, said second lumen having a removable hub at the proximal end of the second lumen in fluid communication with the second lumen,

said method comprising the steps of;

(a) removing the removable hub attached to the second lumen of the balloon dilatation catheter, wherein said catheter system extends distally into a patient'"'"'s blood vessel;

(b) attaching a slitting means to the guidewire;

(c) causing the guidewire to remain stationary; and

(d) pulling the balloon dilatation catheter in the proximal direction to cause the lumen in which the guidewire is contained to open, thus permitting removal of the balloon dilatation catheter while leaving the guidewire in place.

3. A balloon dilatation catheter which comprises

a catheter shaft which defines a first inflation lumen and a second lumen, said catheter shaft having proximal and distal portions, and

an inflatable dilatation balloon sealingly connected to said catheter shaft,

wherein the first lumen extends through the length of said catheter shaft and has distal and proximal ends, said distal end opening into and being in fluid communication with the interior of said inflatable dilatation balloon, and

wherein the second lumen extends coextensively with said first lumen and has proximal and distal portions and an inner wall, said proximal portion of said second lumen having an opening distal to the proximal end of said first lumen, said distal section of said second lumen being exterior to said inflatable dilatation balloon, said distal end of said second lumen being open, said second lumen comprising a pushing wire and lubricious material in the form of concentrically positioned tubing and said pushing wire being held in position in a pressure fit between said lubricious tubing and the inner wall of said second lumen, and said second lumen being capable of receiving a guidewire in a sliding fit.

4. A balloon dilatation catheter which comprises

a catheter shaft which defines a first inflation lumen and a second lumen, said catheter shaft having proximal and distal portions, and

an inflatable dilatation balloon sealingly connected to said catheter shaft,

wherein the first lumen extends thought the length of said catheter shaft and has distal and proximal ends, said distal end opening into and being in fluid communication with the interior of said inflatable dilatation balloon, and

wherein the second lumen extends coextensively with said first lumen and has proximal and distal portions and an inner wall, said proximal portion of said second lumen having an opening adjacent to the proximal end of said first lumen, said distal section of said second lumen being exterior to said inflatable dilatation balloon, said distal end of said second lumem being open, said second lumen comprising a pushing wire and lubricious material in the form of concentrically positioned tubing and said pushing wire being held in position in a pressure fit between said lubricious tubing and the inner wall of said second lumen, and said second lumen being capable of receiving a guidewire in a sliding fit.