Endoscope having a wide-angle lens and a working channel

1. An endoscope comprising:

an endoscope head,

a wide-angle lens on a distal end of the endoscope head, and

a working channel extending in the endoscope head,

wherein, proximally from the wide-angle lens, the working channel is bent laterally toward an outer circumference of the endoscope head,

wherein a distal working channel opening is formed on a lateral side of the endoscope head,

wherein the working channel includes a proximal working channel portion and a distal working channel end portion,

wherein the proximal working channel portion extends in parallel to a longitudinal axis of the endoscope, and

the distal working channel end portion is gently bent in a distal direction from the proximal working channel portion toward the distal working channel opening in a sloping manner;

wherein

the distal working channel end portion contacts the wide-angle lens,

wherein on the distal end of the endoscope head, the wide-angle lens is completely or partially surrounded by a transparent region of the endoscope head,

wherein the transparent region of the endoscope head includes a transition edge where a distal side and the lateral side of the endoscope head meet, and

wherein at least a portion of the distal working channel opening is disposed in the transparent region.

2. The endoscope according to claim 1 , wherein,

adjacent to the wide-angle lens, an illuminator is arranged on the distal end of the endoscope head, wherein the distal working channel opening opens proximally from the illuminator.

3. The endoscope according to claim 2 , wherein

the illuminator surrounds a distal end region of the wide-angle lens in an annular manner or as a portion of a ring.

4. The endoscope according to claim 1 , wherein,

adjacent to the wide-angle lens, an illuminator is arranged on the distal end of the endoscope head, wherein the distal working channel opening opens in the region of the illuminator.

5. The endoscope according to claim 1 , wherein,

adjacent to the wide-angle lens, an illuminator is arranged on the distal end of the endoscope head, wherein the distal working channel opening opens in the region of the wide-angle lens.

6. The endoscope according to claim 1 , wherein,

adjacent to the wide-angle lens, a sprayer for lens cleaning is arranged on the distal end of the endoscope head, wherein the distal working channel opening opens proximally from the sprayer.

7. The endoscope according to claim 1 , wherein

the distal working channel end portion extends in the distal direction at an acute angle to a central axis of the endoscope head.

8. The endoscope according to claim 1 , wherein

an opening of a water spray nozzle is provided adjacent to the distal working channel opening.

9. The endoscope according to claim 1 , wherein,

proximally from the wide-angle lens, the distal working channel opening adjoins the wide-angle lens.

10. The endoscope according to claim 1 , wherein,

on the lateral side of the endoscope head, the distal working channel opening extends into the wide-angle lens.

11. The endoscope according to claim 1 , wherein

a field of view of the wide-angle lens is divided into several individual image sections, wherein from the several individual image sections, a specific image section is selectable.

12. The endoscope according to claim 11 , wherein

the selected image section is digitally equalizable.

13. The endoscope according to claim 1 , wherein

a viewing angle of the wide-angle lens is larger than 180°.

14. The endoscope according to claim 1 , wherein

the endoscope is a flexible endoscope.

15. The endoscope according to claim 1 , wherein

the endoscope is a video endoscope.

16. The endoscope according to claim 1 , wherein at a distalmost surface of the distal end, a curvature of an outside surface of the wide-angle lens is continuous with a curvature of an outside surface the transparent region.

17. An endoscope comprising:

an endoscope head,

a wide-angle lens on a distal end of the endoscope head, and

a working channel extending in the endoscope head,

wherein, proximally from the wide-angle lens, the working channel is bent laterally toward an outer circumference of the endoscope head,

wherein a distal working channel opening is formed on a lateral side of the endoscope head,

wherein the working channel includes a proximal working channel portion and a distal working channel end portion,

wherein the proximal working channel portion extends in parallel to a longitudinal axis of the endoscope, and

the distal working channel end portion is gently bent in a distal direction from the proximal working channel portion toward the distal working channel opening in a sloping manner;

wherein

at least one portion of the distal working channel end portion extends into inside the wide-angle lens,

wherein on the distal end of the endoscope head, the wide-angle lens is completely or partially surrounded by a transparent region of the endoscope head,

wherein the transparent region of the endoscope head includes a transition edge where a distal side and the lateral side of the endoscope head meet, and

wherein at least a portion of the distal working channel opening is disposed in the transparent region.

18. The endoscope according to claim 17 , wherein at a distalmost surface of the distal end, a curvature of an outside surface of the wide-angle lens is continuous with a curvature of an outside surface the transparent region.

19. An endoscope comprising:

an endoscope head,

a wide-angle lens on a distal end of the endoscope head, and

a working channel extending in the endoscope head,

wherein, proximally from the wide-angle lens, the working channel is bent laterally toward an outer circumference of the endoscope head,

wherein a distal working channel opening is formed on a lateral side of the endoscope head,

wherein the working channel includes a proximal working channel portion and a distal working channel end portion,

wherein the proximal working channel portion extends in parallel to a longitudinal axis of the endoscope, and

the distal working channel end portion is gently bent in a distal direction from the proximal working channel portion toward the distal working channel opening in a sloping manner;

wherein

the distal working channel end portion contacts the wide-angle lens,

wherein on a distal end side of the endoscope head, the wide-angle lens is surrounded by a transparent ring member, and

wherein at least a portion of the distal working channel opening is disposed in the transparent ring member.

20. The endoscope according to claim 19 , wherein at a distalmost surface of the distal end, a curvature of an outside surface of the wide-angle lens is continuous with a curvature of an outside surface the transparent ring member.

21. An endoscope comprising:

an endoscope head,

a wide-angle lens on a distal end of the endoscope head, and

a working channel extending in the endoscope head,

wherein, proximally from the wide-angle lens, the working channel is bent laterally toward an outer circumference of the endoscope head,

wherein a distal working channel opening is formed on a lateral side of the endoscope head,

wherein the working channel includes a proximal working channel portion and a distal working channel end portion,

wherein the proximal working channel portion extends in parallel to a longitudinal axis of the endoscope, and

the distal working channel end portion is gently bent in a distal direction from the proximal working channel portion toward the distal working channel opening in a sloping manner;

wherein

at least one portion of the distal working channel end portion extends inside the wide-angle lens,

wherein on a distal end side of the endoscope head, the wide-angle lens is surrounded by a transparent ring member, and

wherein at least a portion of the distal working channel opening is disposed in the transparent ring member.

22. The endoscope according to claim 21 , wherein at a distalmost surface of the distal end, a curvature of an outside surface of the wide-angle lens is continuous with a curvature of an outside surface of the transparent ring member.