Method and apparatus for minimally invasive treatment of chronic venous insufficiency

• US 5,609,598 A
• Filed: 12/30/1994
• Issued: 03/11/1997
• Est. Priority Date: 12/30/1994
• Status: Expired due to Term

• Current Assignee: Tyco Healthcare Group LP (Medtronic Plc)
• Original Assignee: VNUS Medical Technologies Incorporated (Medtronic Plc)
• Inventors: Laufer, Michael D., Montgomery, H. DuBose
• Primary Examiner(s): Buiz, Michael Powell
• Assistant Examiner(s): Leonardo, Mark S.
• Application Number:
  US08/367,063
• Time in Patent Office: 802 Days
• Field of Search: 606/142, 606/143, 623/2
• US Class Current: 606/142
• CPC Class Codes: A61B 17/122 Clamps or clips , e.g. for the umbilical cord for the vas deferens A61F6/206
• CPC Class Codes: A61F 2/2475 Venous valves

Abstract

The invention is embodied in an appliance or a prosthesis and a delivery catheter for use in a vein for minimally invasive treatment of chronic venous insufficiency. The system and method of the invention eliminate the need for open surgical valve repair procedures, obviate the need for arm vein transplantation into the leg, and allow patients to return to their former active lifestyles without the limitations currently associated with the treatment of this condition. An incompetent valve to be repaired is identified by injected contrast through the delivery catheter or similar means and the catheter is positioned at that valve, a clip appliance or similar prosthesis is deployed from the catheter and affixed to the valve. Next, the delivery catheter is repositioned and appliances or prostheses are deployed on sequentially lower valves until all desired valves are repaired and functionally competent.

Claims

1. A method for treating chronic venous insufficiency using a minimally invasive catheter based system, the method comprising:

providing an appliance for repairing an incompetent valve in a vein and a catheter for delivering the appliance;

inserting the catheter and the appliance into a vein of a patient;

positioning the appliance proximate the incompetent valve; and

deploying the appliance such that the valve is repaired to be substantially competent.

2. The method of claim 1, further comprising the step of securing the appliance to a valve within an inner lumen of the vein of the patient.

3. The method of claim 2, wherein the appliance includes a clip having adjustment means for securing the clip onto the valve of the vein and further comprises the steps of positioning the clip on the valve and using the adjustment means to secure the clip to the valve.

4. The method of claim 1, further comprising the steps of:

providing a plurality of appliances disposed within the catheter;

positioning the catheter at a second valve; and

deploying an appliance at said second valve such that the second valve is repaired to become competent.

5. A system configured to be deployable intraluminally to repair an incompetent valve within a vein to competence, the system comprising:

a clip including a first leg, a second leg, and a junction connecting the first leg to the second leg; and

a catheter including a distal end configured to be deployed intraluminally within a vein, the clip being positioned at the distal end of the catheter, wherein the clip is deployed to engage an incompetent valve in the vein to repair the valve to competence.

6. The system of claim 5, wherein the first leg includes a first plurality of bends, and the second leg includes a second plurality of bends, wherein the first and the second plurality of bends assist the clip in gripping the valve.

7. The system of claim 5, wherein the first leg is longer than the second leg.

8. The system of claim 5, wherein the distal end of the catheter includes a slot formed therein, the clip being positioned within the distal end, and the catheter applying force to the clip to cause the first leg to move towards the second leg so that the clip is adjusted into position through the slot to engage the incompetent valve to return the valve to competence.

9. An implantable appliance configured to be deployable via a catheter and configured to repair an incompetent valve within a vein to competence, the appliance comprising:

a clip having a first leg, a second leg, and a junction connecting the first leg to the second leg, the junction biasing the first leg away from the second leg;

a cord attaching the first leg to the second leg;

a rotating element attached to the cord at the second leg; and

a latch having a first end and a second end, the second end of the latch being attached to the second leg, and the first end of the latch being configured to be secured to the first leg;

wherein applying a force to the rotating element of the first leg causes the cord to move the first leg closer to the second leg so that the latch can connect the first leg to the second leg, and the first leg and the second leg are adjusted into position at an incompetent valve in a vein to return the valve to competence.

10. The appliance of claim 9, wherein the first leg is longer than the second leg.