Guidewire extension with sliding release mechanism

• US 5,788,653 A
• Filed: 04/03/1996
• Issued: 08/04/1998
• Est. Priority Date: 04/03/1996
• Status: Expired due to Term

• Current Assignee: Cordis Corporation (Cardinal Health, Inc.)
• Original Assignee: Cordis Corporation (Cardinal Health, Inc.)
• Inventors: Lorenzo, Juan A.
• Primary Examiner(s): Hindenburg, Max
• Assistant Examiner(s): WINGOOD, PAMELA LYNN
• Application Number:
  US08/627,308
• Time in Patent Office: 853 Days
• Field of Search: 128/772, 128/657, 128/658, 604/95, 604/96, 604/280, 604/281, 604/282, 604/283
• US Class Current: 600/585
• CPC Class Codes: A61M 25/0905 extendable, e.g. mechanisms for extension

Abstract

In accordance with the present invention, there is provided a guidewire extension system which easily connects and disconnects the wires. The system includes a guidewire and an extension wire. Each wire has distal and proximal ends and a longitudinal axis therebetween. The distal end of the extension wire adapted to be releasably connected to the proximal end of said guidewire or vise-versa). The system further has a coiled spring mounted the distal end of the extension wire. The spring is adapted to receive the proximal end of the guidewire so that as the wires are puled apart, the spring constricts and grips the guidewire. Lastly, the system includes a tube disposed over the coiled spring. The tube is attached to the extension wire so that it slides along its longitudinal axis. The tube is adapted to engage and expand the spring as it is slid open, towards said proximal end of the extension wire, thereby releasing the guidewire wire.

Claims

1. A guidewire extension system comprising:

(a) a guidewire and an extension wire each having distal and proximal ends and a longitudinal axis extending therebetween;

(b) a coiled spring mounted on said distal end of said extension wire, said spring capable of receiving said proximal end of said guidewire and constricting and gripping said guidewire; and

(c) a tube disposed over said coiled spring, said tube being slideably attached to said extension wire so that it slides relative to said extension wire and parallel to said longitudinal axis of said extension wire, said tube engaging said spring so that as said tube is slid open, towards said proximal end of said extension wire, said coil moves, expands and releases said guidewire.

2. The guidewire extension system of claim 1, wherein an interior of said tube includes a flange so that as said spring is slid open, said flange engages a distal end of said coiled spring thereby expanding said spring.

3. The guidewire extension system of claim 1 wherein said coiled spring comprises an open pitch flat wire coil having an internal diameter slightly less than the outer diameter of the proximal end of the guidewire so that, when the proximal end of said guidewire is urged into said coiled spring, said spring expands to receive said guidewire.

4. The guidewire extension system of claim 1 wherein said tube is of a different color than said extension wire.

5. A guidewire extension system comprising:

(a) a guidewire and an extension wire each having distal and proximal ends and a longitudinal axis extending therebetween;

(b) a coiled spring mounted on said proximal end of said guidewire, said spring capable of receiving said distal end of said extension wire and constricting and gripping said extension wire; and

(c) a tube disposed over said coiled spring, said tube being slideably attached to said guidewire so that it slides relative to said guidewire and parallel to said longitudinal axis of said guidewire, said tube engaging said spring so that as said tube is slid open, towards said distal end of said guidewire, said coil moves, expands and releases said extension wire.

6. The guidewire extension system of claim 5, wherein an interior of said tube includes a flange so that as said spring is slid open, said flange engages a distal end of said coiled spring thereby expanding said spring.

7. The guidewire extension system of claim 5 wherein said coiled spring comprises an open pitch flat wire coil having an internal diameter slightly less than the outer diameter of the distal end of the extension wire so that, when the distal end of said extension wire is urged into said coiled spring, said spring expands to receive said extension wire.

8. The guidewire extension system of claim 5 wherein said tube is of a different color than said extension wire.