JPH0123441Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a forceps elevator operating device for an endoscope, and more specifically, to a structure of a guide pipe for an operation wire that operates the forceps elevator for an endoscope.

As is well known, gastrophic eye scope,
Medical endoscopes such as bronchial fiberscopes are
The flexible body cavity insertion section is inserted into a patient's body cavity to observe and treat the affected area.

As an example of this medical endoscope is shown in FIG.
and a body cavity insertion section 3 inserted into the body cavity. The body cavity insertion part 3 includes a long flexible part 4 having flexibility, a curved part 5 that can be bent in any direction by hand operation of the operating part main body 2, and a well-known illumination optical system. It consists of a tube body consisting of a window (not shown), an observation window (not shown) for an observation optical system, and a tip 6 provided with an opening 7 for forceps entry and exit, etc. Further, the operation section main body 2 is provided with an eyepiece section 8, an angle knob 9 for operating the curved section, a forceps insertion port 10, a lifting forceps lifting knob 11, an air/water supply button 12, a suction button 13, etc. There is.

In the endoscope 1 configured as described above, the insertion section 3 is inserted into the patient's body cavity in the order of the curved section 5 and the flexible section 4 from the distal end 6, and the distal end 6 is observed by operating the angle knob 9. The curved part 5 is curved so that the window and lighting window face the affected area.

When observing the affected area and collecting cell tissue from the affected area or performing treatment using forceps, the forceps 14 are inserted through the forceps insertion port 10 and passed through the flexible part 4 and the curved part 5 to remove the tip. 6, and then operate the forceps lifting knob 11 provided on the operation section main body 2, and attach the tip portion 6 to the operation wire 15, which is moved forward and backward by this knob 11. The forceps lifting base 16 connected with the pivot pin 16
The forceps 14 are operated by rotating the forceps 14 around the point a to direct the forceps 14 in contact with the forceps raising stand 16 toward the affected area.

By the way, the conventional forceps elevator operating device has a configuration shown in FIG. 2 in the distal end portion 6 and the curved portion 5. As shown in FIG. That is, the forceps lifting stand 16
The operating wire 15 for operating the body cavity insertion section 3 is guided by a guide pipe in the tube axis direction, and in the curved section 5, this guide pipe can be easily bent. Attach the plastic tube 1 to the closely wound coil 17 so that the
A flexible guide pipe 19 covered with 8 is used. This pipe 19 has one end fixed to a small-diameter guide pipe 20 fixed to the tip portion 6, and the other end coupled to a guide pipe 21 formed of a metal pipe disposed within the flexible portion 4. ing.

However, in the operating device configured in this way, when the insertion section 3 is inserted into the body cavity, the forceps entry/exit opening 7 of the tip section 6 opens toward the outside, so that the opening 7 Body fluids such as gastric juices enter the guide pipe 19 through the small-diameter guide pipe 20 as the operating wire 15 advances and retreats. This guide pipe 19
The body fluid that has entered the coil 17 directly adheres to the tightly wound coil 17, and further penetrates into the space between the outer circumference of the coil 17 and the plastic tube 18 through the gaps between the windings of the coil 17 due to capillary action.

In addition, after use, the endoscope 1 is generally immersed in a cleaning solution to wash away dirt such as body fluids and disinfect it. It is extremely difficult to wash out body fluids that have entered the space between the coil 17 and the plastic tube 18 through the coil 17 and the plastic tube 18.
Moreover, once the cleaning liquid for washing away body fluids enters the gap between the tightly wound coil 17 and between the coil 17 and the plastic tube 18, it accumulates in that area and cannot easily flow out.

Therefore, the body fluids and cleaning fluid that have entered the guide pipe 19 become attached to the tightly wound coil 17 and the plastic tube 18 and are retained therein, and if this state continues for a long period of time, the body fluids and cleaning fluid will cause the tightly wound coil 17 and the plastic tube 18 to be retained. 17 causes rust or corrosion. In addition, the closely wound coil 17 may become stuck to the operating wire 15 due to wedge formation, or
There were drawbacks such as breakage due to corrosion, which obstructed the movement of the operating wire 15, and breakage of the operating wire 15 due to breakage or buckling, which significantly deteriorated the durability of the forceps lifting operating device.

In order to eliminate the above-mentioned conventional drawbacks, the present invention
An object of the present invention is to provide a forceps elevator operating device for an endoscope in which a tightly wound coil used for guiding an operating wire of the forceps elevator is protected by a watertight tube.

Hereinafter, the present invention will be explained based on the illustrated embodiments.

FIG. 3 is a sectional view of a main part of a forceps elevator operating device showing an embodiment of the present invention. A wire guide pipe 25 that guides the operating wire 15 in this forceps elevator operating device within the curved portion 5
is structured as follows. This wire guide pipe 25 has a plastic tube 26 having watertightness and flexibility disposed inside thereof, and a tightly wound coil 27 having flexibility and restorability disposed outside thereof as in the conventional case. This closely wound coil 27 and the closely wound coil 17 are connected to the curved portion 5
This is to prevent the wire 15 from remaining bent when the bending operation is restored. One end of each of the plastic tube 26 and tightly wound coil 27 is fixed to a small-diameter guide pipe 20 that is integrally attached to the tip part 6, and the other end of each is fixed to a metal pipe 20 inside the flexible part 4.
It is fixed at 1. Therefore, the guide passage 28 for the operating wire in the curved portion 5 is formed of a plastic tube 26 that connects the guide pipe 20 and the metal pipe 21.
5 is against the inner wall of a plastic tube 26, and the outer tightly wound coil 27 is separated from the passage 28 by this plastic tube 26.

Wire guide pipe 25 configured in this way
In this case, the body fluid enters and exits the forceps through the opening 7 in the tip 6.
Even if the body fluid enters the passage 28 through the guide pipe 20, the body fluid adheres only to the inner peripheral wall of the plastic tube 26 inside the wire guide pipe 25 in this passage 28 and wets it. Since the plastic tube 26 covers and protects the plastic tube 27 from the inside, it will not adhere to the coil 27.

Further, after the endoscope examination is completed, the insertion section 3 is pulled out from the body cavity, and the body cavity insertion section 3 is suspended with its distal end 6 facing downward, and the operation wire 15 is suspended.
When the plastic tube 26 is moved forward and backward several times, the body fluid that has entered the passage 28 and accumulated in the tube 26 flows along the inner circumferential wall of the plastic tube 26 and flows into the guide pipe 2.
0 and flows out from the forceps entrance/exit opening 7.

Furthermore, after cleaning the endoscope, the body cavity insertion part 3
If the operating wire 15 is moved forward and backward again several times, the cleaning liquid that entered through the forceps entry/exit opening 7 and accumulated in the passage 28 during cleaning will be removed from the plastic tube 26. easily flows out through the inner circumferential wall of the

As described above, according to the present invention, body fluids and cleaning fluids do not accumulate in the wire guide pipe within the curved portion, so that the drawbacks of the conventional wire guide pipe are eliminated.

In order to stabilize the shape of the tightly wound coil 27 when the curved portion 5 is curved, the wire guide pipe 25 further covers the outer periphery of the tightly wound coil 27 with a mesh tube 29 as shown in FIG. Alternatively, as shown in FIG. 5, the mesh tube 29 may be disposed between the tightly wound coil 27 and the plastic tube 26 to form three-layer wire guide pipes 30 and 31, respectively.

In the above embodiment, since a tightly wound coil is normally used in the curved portion 5, a flexible watertight plastic tube 26 is arranged inside the tightly wound coil 27 for this portion. However, other than the curved portion 5, for example, the flexible portion 4
Even when a tightly wound coil 27 is used to guide the operating wire 15 inside the wire guide pipe 25, 30, or 31 having a plastic tube 26 inside the tightly wound coil 27 can be used in this part. , and this configuration is preferable for the reasons mentioned above.

As described above, according to the endoscope forceps elevator operating device according to the present invention, at least the curved portion is flexible inward as a guide pipe for the operating wire of the forceps elevator for raising the forceps. Because it uses a wire guide pipe with a watertight tube and a tightly wound coil on the outside,
Even if body fluids or cleaning fluids enter the passage of the operating wire, the tightly wound coil does not come into contact with these fluids, so rust and corrosion of the coil is prevented.
Therefore, as in the past, the operation wire may become stuck to the coil due to rust or corrosion in the tightly wound coil and its movement is obstructed, or the coil may break due to corrosion, causing buckling or breakage. This will improve durability. In addition, since the passage of the operating wire 15 is formed of a watertight tube, body fluids and cleaning fluids that have entered this passage can easily flow out without accumulating in this part, and this watertight tube has less sliding resistance than the coil. Since it is small, it has excellent effects such as smooth movement of the operating wire back and forth.

It goes without saying that the tightly wound coil may be formed of a spiral tube made of a band-shaped elastic body.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an example of a medical endoscope;
FIG. 2 is a sectional view of a main part showing an example of a conventional forceps elevator operating device, FIG. 3 is a sectional view of an essential part of a forceps elevator operating device showing an embodiment of the present invention, and FIG.
FIG. 5 is a cross-sectional view of a main part of a forceps elevator operating device showing still another embodiment of the present invention. FIG. 1 ... Endoscope, 3... Body cavity insertion part, 4... Flexible part, 5... Curved part, 6... Tip part, 7... Opening for forceps entry and exit, 15... Operation wire, 16 ... Forceps elevator, 25, 30, 31 ... Wire guide pipe, 26 ... Plastic tube (flexible tube), 27 ... Closely wound coil, 28 ... Passage,
29... Reticular tube.

Claims (1)

[Scope of Claim for Utility Model Registration] A forceps elevator provided within the distal end of an intrabody cavity insertion portion consisting of a distal end, a curved portion, and a flexible portion,
In an endoscope that is operated at hand from the main body of the operating section by means of an operating wire threaded through the body cavity insertion section, the endoscope is disposed within a curved portion of the body cavity insertion section, and the operation wire is inserted through the endoscope to perform a bending operation. The wire guide pipe that guides the wire when
A flexible tube with watertightness is arranged on the inner circumference,
A forceps elevator operating device characterized in that a flexible restoring coil is provided on the outer periphery of the tube.