Laparoscopic device and endoscopic system

1. An endoscopic system, comprising:

a flexible insertion part comprising:

an imaging optical system comprising a lens or an image fiber; and

a light source that is covered with an exterior tube;

an operational part connected to a base end of the insertion part; and

a guide catheter, in which the insertion part is inserted, that guides the insertion part,

wherein the guide catheter:

is inserted through an indwelling catheter that guides the guide catheter within a body cavity; and

guides the insertion part in a direction different from an extending direction of the indwelling catheter when the guide catheter is extended from a terminal opening of the indwelling catheter,

wherein the insertion part is guided by a curvature of a distal extended part of the guide catheter,

wherein the curvature of the distal extended part of the guide catheter:

includes grooves disposed on an outer surface of the guide catheter; and

bends, at the grooves, during an operation of the guide catheter using a wire that is coupled to the guide catheter and an operation dial and is operated via the operation dial,

wherein the endoscopic system further comprises:

(a) a fluid feeding means comprising an infusion bag and an infusion pump, or comprising a syringe and a syringe pump; and

(b) a joint that comprises:

a first connector part that is connected to a proximal end of the indwelling catheter;

a second connector part connected to an output end of the fluid feeding means;

an insertion opening in which the guide catheter is inserted; and

a channel that communicates the first connector part to the second connector part at one end and the insertion opening at another end through a confluent part, and

wherein the guide catheter has a side hole through which a fluid fed from the fluid feeding means to the joint flows into the guide catheter.

2. The endoscopic system according to claim 1 , wherein a front end of the insertion part has an originally formed curved shape or comprises a bending mechanism which is operated during use for bending the front end.

3. The endoscopic system according to claim 1 ,

wherein the guide catheter enters the joint from the insertion opening to the channel, and can pass through the confluent part and the first connector part to enter the indwelling catheter connected to the first connector part, and

wherein fluid fed from the fluid feeding means that is connected to the second connector part passes through the confluent part and the first connector part to flow into the indwelling catheter connected to the first connector part.

4. The endoscopic system according to claim 3 , wherein the joint comprises a check valve between the insertion opening and the confluent part to prevent the fluid from leaking through the insertion opening.

5. The endoscopic system according to claim 3 , wherein the guide catheter comprises a hydrophilic coating on an outer face of the guide catheter.

6. The endoscopic system according to claim 3 , wherein the guide catheter comprises a hydrophilic coating on an inner face of the guide catheter.

7. The endoscopic system according to claim 3 , wherein the joint comprises a valve that fixes the guide catheter to the joint, the guide catheter is inserted through the insertion opening.

8. The endoscopic system according to claim 1 , wherein a mark that indicates an orientation of the curvature is provided in the guide catheter.

9. The endoscopic system according to claim 1 , wherein a mark that indicates an inserted length is provided in the guide catheter.

10. The endoscopic system according to claim 1 , wherein a mark that indicates an insertion length is provided in the insertion part.

11. The endoscopic system according to claim 1 , wherein the exterior tube comprises a hydrophilic coating on an outer face of the exterior tube.