Method and device for valve repair
View Patent ↗A method and a device for minimally invasive treatment of diseased deep and superficial venous valves are disclosed. Treatment seeks to repair/rejuvenate dysfunctional valve by reducing the circumference of dilated valve rings and by restoring their original shape and function using laser energy to make physical suture points and shrink collagen in selected points. Real time monitoring is by angioscopic view and endovenous echographic control. In a preferred embodiment, system comprises a specific catheter-like device for endovenous insertion that allows for real time view of energy emission and venous surface to be corrected. Catheter flexibility is such that viewing angle and direct energy emission can be oriented properly. Catheter can comprise channels for irrigation or for interchange of laser fibers according to desired irradiation pattern. A preferred embodiment of catheter device also comprises cuffs for temporary occlusion, by inflation and deflation. In preferred embodiments, 1470 nm, 1550 nm or 1900 nm laser energy is applied. This treatment can be applied to venous valves of the deep venous system, as well as valves of the sapheno-femoral junction, terminal valve and pre-terminal valve.
1. A method for repairing a vessel valve with an endoluminal catheter device comprising the steps of:
a. introducing said catheter device endoluminally through said vessel to the area downstream of the valve,
b. applying distal and proximal cuffs to occlude blood flow in the area of the valve,
c. washing the vessel substantially free of blood in the area of the vessel between the cuffs,
d. inserting a 360° radially emitting optical fiber through the catheter device,
e. irradiating the post-valve segment of the vessel wall with laser radiation from the 360° radially emitting optical fiber to reduce the diameter of the vessel's inner wall in the post valve segment,
f. irradiating the pre-valve segment of the vessel wall with laser radiation from the 360° radially emitting optical fiber to reduce the diameter of the vessel's inner wall in the pre valve segment,
g. replacing the 360° radially emitting optical fiber by an axially emitting optical fiber,
h. applying laser suture points to the valve ring with the axially emitting optical fiber,
i. removing the cuffs, and
j. assessing the irradiation results.
2. The method according to claim 1 wherein said introducing said catheter device is selected from the group consisting of echo-guided puncture according to Seldinger technique and direct venous access.
3. The method according to claim 1 wherein said applying laser radiation is irradiating at a wavelength selected from the group of about 1470±30 nm, about 1550±30 nm and about 1900±50 nm.
4. The method according to claim 1 further comprising the step of irrigating vessel with liquid solution.
5. The method according to claim 1 wherein said evaluating irradiation results is done by ultrasound control.