Uretero-renoscope with catheter body having plural partitioned inner conduits

• US 5,156,590 A
• Filed: 06/24/1991
• Issued: 10/20/1992
• Est. Priority Date: 06/24/1991
• Status: Expired due to Fees

• Current Assignee: Wolfgang Vilmar
• Original Assignee: Wolfgang Vilmar
• Inventors: Vilmar, Wolfgang
• Primary Examiner(s): Wilson, John J.
• Assistant Examiner(s): Smith, Jeffrey A.
• Application Number:
  US07/719,438
• Time in Patent Office: 484 Days
• Field of Search: 128/4, 128/6, 128/7
• US Class Current: 604/6.16
• CPC Class Codes: A61B 1/0051 with controlled bending of insertion part
• CPC Class Codes: A61B 1/07 using light-conductive means, e.g. optical fibres
• CPC Class Codes: A61B 1/307 for the urinary organs, e.g. urethroscopes, cystoscopes

Abstract

An endoscope, particularly for use as a uretero-renoscope, includes a catheter head piece with a flexible catheter body in the form of a semi-flexible hose having a highly flexible tip, the hose being divided into internal axially extending conduits by interior walls which bisect the interior of the catheter body in a asymmetric fashion so that the conduits are not of equal size. The head piece is in the form of an ergonimcally shaped rod-like handle which surrounds an eye piece and is disclosed coaxial with the catheter body.

Claims

1. An endoscope comprising;

an ergonomically rodlike handle (47) on a catheter head piece (2),

a first end of a flexible tubular catheter body (3) detachably engaged to said catheter head piece (2),

said catheter body (3) having a circular cross section and at least four axially extending conduits (20, 21, 22,

     23),

said at least four axially extending conduits (20, 21, 22,

     23) formed by two axially extending partitions (17,

     18) intersecting at right angles at a point eccentric to said circular cross section of said catheter body (3),

connector passages (20'"'"',21'"'"', 22'"'"', 23'"'"') opening on said head piece (2) separately communicating with said at least four axially extending conduits (20, 21, 22,

     23),

a first end of a tip (16) engaged to a second end of said catheter body (3),

said at least four axially extending conduits extending to a free end of said tip,

a first end of a single Bowden control wire (37) engaged on said handle (47),

said control wire (37) extending through said catheter body (3) and eccentrically connected at a second end of said control wire to said free end of said tip (16),

control means (35, 45,

     46) on said handle (47) and connected to said single Bowden control wire (37) for axially moving said control wire (37),

means associated with said tip for permitting said tip to flex relative to said second end of said catheter body (3) when said control means is actuated,

one of said at least four axially extending conduits containing a light conducting fiberglass bundle (30),

a connector passage of said connector passages communicating with said one of said at least four axially extending conduits containing said light conducting fiberglass bundle (30) having an eye piece on said handle (47), and

the remaining conduits of said at least four axially extending conduits selectively used for working and irrigation conduits.

2. An endoscope in accordance with claim 1, wherein said eye piece (13) is integrated with the front of said end of the handle (47) facing away from the catheter body (3).

3. An endoscope in accordance with claim 1, wherein all said connector passages which are in communication with said conduits are located near the tip of the handle facing the patient, thereby providing a wide and uncluttered handle area (47).

4. An endoscope in accordance with claim 1, wherein said connector passages are disposed symmetrically around the center axis of said head piece (2).

5. An endoscope in accordance with claim 1, wherein said catheter body (3) is made of flexible plastic.

6. An endoscope in accordance with claim 1, wherein said catheter body (3) has a circular-cylindrical outer side wall connected by said two axially extending partitions (17, 18) which intersect and define therebetween with said sidewall said at least four axially extending conduits (20, 21, 22, 23), and wherein

two conduits (20, 21) of said at least four axially extending conduits each has larger cross sections in comparison with the remaining conduits (22, 23).

7. An endoscope in accordance with claim 1, wherein said head piece (2) and the catheter body (3) are removably connected to each other by means of a connecting device in the form of a handle tip (15), which can be screwed on said head piece (2) and receives said first end of said catheter body (3).

8. An endoscope in accordance with claim 1, wherein said head piece (2) and the catheter body (3) are made in one piece.

9. An endoscope in accordance with claim 8, wherein said head piece (2) and the catheter body (3) are made of plastic.

10. An endoscope in accordance with claim 1, wherein said tip (16) of the catheter body (3) has greater flexibility than said catheter body.

11. An endoscope in accordance with claim 10, wherein said tip (16) is constructed to flex at least 90°

.

12. An endoscope in accordance with claim 8, wherein said control means comprises a lever (35), pivotable crosswise to the longitudinal axis of said head piece (2), and disposed axially to said handle (47).

13. An endoscope in accordance with claim 1, wherein said head piece (2) contains a branch line (11) which carries a portion of said light conducting fiberglass bundle (30) to a light source (14) on said head piece (2).

14. An endoscope in accordance with claim 1, wherein an axially extending conduit (39), containing said single Bowden control wire (37), is provided in said catheter body (3) at the intersect of said interior walls.

15. An endoscope in accordance with claim 1, comprising a metal ring (42), inserted at said free end of said tip (16), said ring surrounding ends of two conduits (22, 23) of said at least four axially extending conduits used as said working and irrigation conduits, the ends of said two conduits (22, 23) fixed in the area of the ring (42).

16. An endoscope in accordance with claim 1, wherein said ends of said two conduits (22, 23) are molded into plastic.