Application part for an endoscope

• US 4,838,246 A
• Filed: 08/13/1987
• Issued: 06/13/1989
• Est. Priority Date: 08/13/1986
• Status: Expired due to Fees

• Current Assignee: Messerschmitt-Bolkow-Blohm GmbH
• Original Assignee: Messerschmitt-Bolkow-Blohm GmbH
• Inventors: Hahn, Andreas, Frank, Frank, Wondrazek, Fritz
• Primary Examiner(s): Grieb, William H.
• Application Number:
  US07/085,396
• Time in Patent Office: 670 Days
• Field of Search: 128/4, 128/6, 128/303.1, 128/303.15
• US Class Current: 600/108
• CPC Class Codes: A61B 1/00091 Nozzles
• CPC Class Codes: A61B 1/127 with means for preventing fogging A61B1/253 takes precedence
• CPC Class Codes: A61B 18/26 for producing a shock wave, e.g. laser lithotripsy
• CPC Class Codes: A61B 8/12 in body cavities or body tracts, e.g. by using catheters catheters per se A61M25/00
• CPC Class Codes: G02B 23/2423 of the distal end
• CPC Class Codes: G10K 15/046 using optical excitation, e.g. laser bundle

Abstract

The disclosure relates to an application part for rigid or flexible endoscopes having a viewing channel and a working channel extending parallel to the viewing channel, with the working channel being equipped with a guide as well as a defined stop for a fiber optic waveguide, which can be inserted and coupled with a laser light source, and the working channel having optics for concentrating the laser light emerging from the fiber optic waveguide onto a punctiform area. The part of the working channel surrounding the punctiform area is formed as shock wave reflector. Further, a flushing channel is provided, the outlet opening of which is at least partially directed onto the face of the optics from which the light emerges.

Claims

1. In an application part for an endoscope, said application part comprising a viewing channel and a working channel extending parallel to said viewing channel;

said working channel including a guiding means and a defined stop for slidable insertion of a fiber optic waveguide, selectively coupled to a laser light source, an improvement in said application part wherein said working channel includes an optics arrangement for concentrating the laser light emerging from the fiber optic wave guide onto a punctiform region, and further said working channel being arranged to extend beyond the optics arrangement in the direction of said punctiform region to form a shock wave reflector and further comprising a flushing channel having an outlet opening which is at least partially directed toward the face of said optics arrangement from which the light emerges.

2. The application part of claim 1, wherein said optics arrangement on the side facing the shock wave reflector includes a concave-convex lens, the concave surface of which is connected at the outer edge with said shock wave reflector.

3. The application part of either claims 1 or 2, wherein at least one lens of the optics arrangement adjacent to said shock reflector includes an elastic seal in the region of the lens mount.

4. The application part of any one of claims 1 or 2, wherein the lenses of said optics arrangement facing the shock wave reflector and the fiber optic waveguide being made from quartz glass.

5. The application part of any one of claims 1 or 2, wherein the lenses of said optics arrangement facing the shock wave reflector and the fiber optic waveguide being made from sapphire.

6. The application part of any one of claims 1 or 2, wherein the optics arrangement is a reduction optics arrangement with a reproduction ratio of no more than 1:

4.

7. The application part of any one of claims 1 or 2, wherein the focal point of the optics arrangement and the focus of the shock wave reflector lie on the plane defined by the distal edge of the shock wave reflector.

8. The application part of any one of claims 1 or 2, wherein the viewing, working, and flushing channels extend parallel to one another and have a common sheathing.

9. The application part of claim 8 wherein said common sheathing is of a circular cross section.

10. The application part of claim 8 wherein said common sheathing is of an elliptical cross section.

11. The application part of claim 8 wherein said common sheathing is of an oval cross section.

12. The application part of claim 8 wherein said common sheathing is of a non-uniform round cross section.

13. The application part of any one of claims 1 or 2, wherein the proximal opening of the working channel includes a clamping device to clamp said fiber optic waveguide.

14. The application part of claim 1 wherein said endoscope is a flexible endoscope.

15. The application part of claim 1 wherein said endoscope is a rigid endoscope.