Apparatus for endo fistula laser therapy

Abstract

A method and apparatus for rectal fistula laser treatment wherein an insertion tube of a coupler is inserted into a fistula from proximal to distal end. The insertion tube is then purged using sterile water and/or air. A flexible optical waveguide is then inserted through the coupler including the insertion tube until the end of the optical waveguide protrudes 1-3 mm from the distal end of the insertion tube. The optical waveguide is secured to the coupler by a lock nut of the coupler. The insertion tube locked to the optical waveguide is withdrawn through the fistula while CO2 laser radiation is passed down the optical waveguide so that laser radiation is delivered to the inner wall of the fistula at a specific rate as the laser radiation treats the fistula.

What is claimed is: 
     
         1 . A coupler device for performing laser therapy on a fistula comprising:
 an insertion tube integrated into a first end of said coupler device;   a removable lock nut forming a second end of said coupler device;   a cavity extending through a center of said coupler device from said first end to said second end, said cavity extending through said insertion tube;   a purge tube attached to a side of said coupler device and engaging with said cavity for passage of fluid from said purge tube to said insertion tube, and   a compression washer positioned within said coupler device for securing in cooperation with said lock nut a waveguide passing through said cavity within said coupler device.   
     
     
         2 . The coupler device as recited in  claim 1  further comprises a cap at an end of a cord, said cord attaching to said side of said coupler. 
     
     
         3 . The coupler device as recited in  claim 1  wherein said compression washer comprises said cavity for receiving said waveguide within said coupler device. 
     
     
         4 . The coupler device as recited in  claim 1  comprises a plastic material. 
     
     
         5 . The coupler device as recited in claim  11  wherein said insertion tube end comprises graduated markings on an external surface of said insertion tube.