JPS612838A - Hard endoscope sheath - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention relates to a rigid endoscope sheath that facilitates water supply and tJI water switching operations.

[Technical Background of the Invention and its Problems 1] In recent years, endoscopes have been widely used in the medical and industrial fields.

The above-mentioned endoscopes are divided into flexible endoscopes with flexible insertion sections so that they can be inserted through curved paths, and rigid endoscopes with rigid insertion sections. J! There is a mirror.

The above-mentioned rigid endoscope has a rigid insertion section, so it has good aiming performance, and a relay lens system with high resolution can be used as the image transmission means, and it has a flexible endoscope that is generally used in flexible endoscopes. This fiber bundle has the advantage that it is possible to obtain images that are clearer and easier to diagnose than when using formed image transmission means.

By the way, the above-mentioned rigid endoscope is inserted into a body cavity by passing through a hollow rigid endoscope sheath.

The above-mentioned sheath (for rigid endoscope) is equipped with water supply and drainage functions to facilitate observation using a rigid endoscope or insertion of a treatment instrument for treatment. For example, when used as a resectoscope, a resect 1-handle is attached to the rear end of the sheath, and the rigid endoscope body (optical viewing tube) and resection electrode are inserted into the hollow part of the sheath. It is attached as shown. Is it possible to send irrigation fluid through the inside of the sheath from the water supply port provided on the proximal side of the sheath, or through the sheath? Fl flowing liquid can be discharged.

FIG. 8 shows a conventional example disclosed in US Pat. No. 3,791,379. In this conventional example, the rear end of an insertion pipe 2 is fixed to the front end side of a hollow sheath body 1, and a water supply port 3 and a drainage port 4 are provided on the outer periphery of the sheath body 1, which are perpendicular to the central axis of the sheath body 1. A lever 6 for switching water supply and drainage, which protrudes so as to fit within the plane and is rotatable within a circumferentially elongated window 5, is adjacent to the water supply port 3 and drain port 4. It is being As shown in FIG. 9<a> or (b), this lever 6 is fixed to a hollow cock core 7 fitted inside the sheath body 1, and this cock core 7 has an outer circumference. Holes 8a and 8b are provided at two locations. As shown in FIG. 9(a) or (b), the holes 8a and 8b are arranged so that they can communicate with the water supply port 3 and the drain port 4, respectively, at each rotational position where the lever 6 moves away from each other. It has become.

When operating the lever 6, the water supply and drainage switching mechanism described above gets in the way due to the protruding water supply port 3 and drain port 4, and especially when tubes are connected to the water supply port 3 and the drain port 4, the lever 6 becomes even more difficult to operate. The disadvantage was that it became difficult to rotate the Furthermore, during use, the lever 6 tends to get caught and rotated carelessly, resulting in a malfunction, resulting in a lack of reliability.

[Objective of the Invention] The present invention has been made in view of the above-mentioned points, and it is possible to switch the water supply and drainage in a state where they can be easily operated without the protruding water supply port and drainage port getting in the way. An object of the present invention is to provide a highly reliable rigid endoscope sheath whose settings will not change inadvertently.

Summary of the Invention] The present invention provides a valve body that fits into the inner periphery of a hollow sheath body and can move back and forth relative to the sheath body, and is releasably fixed at each predetermined position. In addition, by providing a switching means for water supply and drainage that selectively communicates with the water supply port or the drainage port at each predetermined position, the water supply and drainage can be switched with a simple operation, and it can be prevented from being used accidentally from the set state. Be certain that it will never change.

[Embodiments of the invention] Hereinafter, the present invention will be specifically explained with reference to the drawings.

Figures 1 to 6 relate to the first embodiment of the present invention.
The figure shows li1! of the first embodiment. Fig. 2 shows the external appearance, and Fig. 3 shows the connecting part of the valve body in Fig. 2 with the bottle inserted into the front and rear recesses on the mllli plane, and the valve body is set in a fixed state. Figure 4 shows A- in Figure 3(a).
A cross section taken along line A is shown, FIG. 5 shows the outer shape of the valve body, and FIG. 6 shows the valve body set in a state where water can be fed and a state where water can be drained.

As shown in FIG. 1, the rigid endoscope sheath 11 of the first embodiment includes an elongated and hollow sheath insertion pipe 12 that is inserted into a body cavity, and a rear end of this sheath insertion pipe 12 that is brazed or screwed. A sheath body 13 connected to the front end of the sheath body 13 by
and a valve body 14 attached to this sheath body 13 from the rear.
It is composed of.

A diagonally cut insulating distal tip 15 is attached to the front end of the sheath insertion pipe 12.

On the other hand 6, the sheath main body 13 has a substantially short cylindrical shape, and the sheath main body 13
A water supply port 16 and a drain port 17 are provided in a protruding manner to communicate with the hollow portion of the water supply port 16.
8 is provided, and the water supply amount can be adjusted by operating the cock lever 18a.

Further, a valve is provided at the rear end side of the short cylindrical shape of the sheath body 13.

The valve body 14 has a hollow structure so that the front end side of the resect handle 20, which is attached from the rear thereof, can be fitted and housed, and the rear end side of the valve body 14 has an enlarged diameter shape.
A handle connecting portion 21 is provided to which the select handle 20 can be detachably connected.

As shown in FIG. 3 or 4, the valve body connection portion 19 is formed by cutting out the outer periphery of the rear end of the sheath body 13 with an enlarged diameter, leaving a part (front side). Guide pins 24 and 25 are provided to protrude, for example, in the vertical direction of the annular portion 23, holes are provided to accommodate the guide pins 24 and 25, and a connecting ring 26 is loosely fitted to the outside of the annular portion 23. ing. A fixing release button 28 is screwed into the hole that accommodates one of the guide pins (the upper pin 24) with a spring 27 interposed therebetween, and the connecting ring 26 loosely fitted into the annular portion 23 is connected to the spring 2.
7, it is constantly urged to move upwardly along the guide bins 24,25.

By pressing the fixing release button 28, the biasing force applied by the spring 27 can be released.

Furthermore, as shown in FIGS. 3 and 4, there are cutouts 29 at two locations on the left and right sides of the inner periphery of the connection ring 26 from the rear end side.
．． 29, and at the lower side edge of each notch 29, two indentations 30a and 30b are formed in the front part, as shown by broken lines in FIG.

The annular portion 23 is also provided with slit-shaped grooves 31° 31 parallel to the central axis direction at 211 positions on the left and right sides thereof. The width of the matching groove 31 is narrower than the notch 29 described above.

On the other hand, the valve body 14, as shown in FIG. 4 or 5,
Pins 32° 32 are provided at two places on the left and right on the outer periphery, and when the front end side of the valve body 14 is inserted from the rear of the valve body connection part 19 of the sheath body 13 (in this case, by pressing the fixation release button 28 Eliminating the biasing horn caused by the spring 27)
, each pin No. 32 can be inserted into the groove 31 of the annular portion 23 and the notch 29 provided in the connecting ring 26 on the outer periphery of the groove, that is, forwardly.

Therefore, when each of the pins 32 reaches the recess 30b on the rear side of the notch 29, the fixing release button 28
When the compression of the pins 30 is stopped, the spring 27 causes the connecting ring 26 to move upward with respect to the annular portion 23, and as shown in FIG.
The valve body 14 is set in a fixed state in which it cannot be moved (by being pressed against the lower side edge of the valve body 14). Press the fixing release button 28 to float each pin 32 so that it does not touch the edge of the recess 30b, and further insert the valve body 14 forward until the pin 32 comes into contact with the front side of the notch 29, and fix it. Release button 28
When the suppression of the pin 32 is stopped, as shown in Fig. 3(a),
is housed in the front recess 30a, and the valve body 14 is in a fixed state where it cannot be moved.

By the way, as shown in FIG. 5, the pin 3 in the valve body 14
There are water supply holes 3 in two places, upper and lower, on the outer periphery of the front side of 2.
4 and the drainage opening 35 are connected to the water supply hole 34,
A drain ignition 35 is provided at the front position. Therefore, when the valve body 14 is fixed at a position closer to the front with respect to the sheath body 13 (the state shown in FIG. 3 <a> or the state shown in FIG. 6 (a)), that is, the pin 32 is
b, when the water supply hole 34 of the valve body 14 and the water supply port 16 of the sheath body 13 are aligned, the water supply port 16
and the hollow part of the sheath insertion pipe 12 are in communication with each other, so that a water supply state is established in which water can be supplied. Also, the valve body 14
When the valve is fixed at a rearward position with respect to the sheath body 13 (the state shown in FIG. 3(b) or FIG. 6(b)), that is, when the pin 32 is engaged in the recess 30a, the valve body 1
4 drain notch 35 and the drain port 17 of the sheath body 13
This allows the water to be set in a state where it can be drained.

Note that the handle connection portion 21 formed on the rear end side of the valve body 14
It is also approximately the same as the valve body connection portion 19 formed on the sheath body 14.
For example, the fixing release button 3 provided at the top
By pressing 6, the accept handle 20 can be attached, or the accept handle 20 attached 8 can be removed.

(Of course, in this case, since it is sufficient for the resect handle 20 to be mounted at one location in the front and rear directions, the recess is also provided at one location in the front and rear directions.

).

Incidentally, the above-mentioned resect handle 20 is configured such that an optical viewing tube as a rigid endoscope can be attached from the rear thereof.

The insertion portion of this optical viewing tube is inserted through the sheath insertion pipe 12, and its tip is inside the tip depth member 15,
Using the observation optical system formed at the tip of the insertion section, the N pole is inserted into the sheath insertion pipe 12 for resection, the rear end is fixed to the resect handle 20, and the N pole is pushed out and retracted by operation on the proximal side. The tip of the electrode and the side of the affected area to be excised by the tip of the electrode can be observed.

According to the first embodiment configured in this way, when used as a resect scope that is inserted into the urethra etc. to remove the prostate, the sheath 11 of the first embodiment has the resect handle 20 attached from the 1*9a side. is attached, and an optical viewing tube for observation is attached from behind.

Further, the rear end of the electrode is fixed to the select handle 20. Therefore, when it is necessary to send irrigation fluid to observe the affected area when observing with an optical viewing tube, as shown in FIG. 1 or FIG. 6(a), the handle connecting portion of the valve body 14 21 and the valve body connection portion 19 of the sheath body 14 are set in a state in which they are substantially in contact with each other in the front and rear. If this is not the case,
By pressing the fixation release button 28 of the valve body connection part 19, the valve body 14 side (the valve body 14 and the resect handle 20 etc. are in a fixed state) can be easily moved forward, and then If the suppression of the button 28 is stopped,
Can be set to the above state. In this state, the water supply port 16 is aligned with the water supply hole 34 of the valve body 14 via the cock 18, and is in a water supply state communicating with the hollow part of the sheath insertion pipe 12. You can freely set the water flow rate.

On the other hand, when draining the pumped irrigation fluid, press the button 28 and move the valve body 14 rearward to the position of the rear recess 30b, and stop pressing the button 28, as shown in Fig. 6 ( As shown in b), the water supply port 16 is closed, and on the other hand, the base side of the drain port 17 is aligned with the drainage notch 35 and is set in a state where water can be drained, and the irrigation fluid is discharged.

The above-mentioned water supply state and drainage state are each held in a fixed state in which each bottle 32 is pressed against the recesses 30a and 30b by the spring 27, so that each state may be changed inadvertently during use as in the conventional example. The water supply and drainage can be switched with a simple operation without being stored, and the switched state can be maintained reliably, making it possible to realize highly reliable water supply and drainage means and switching means for water supply and drainage.

FIG. 7 shows a second embodiment of the invention.

The rigid endoscope sheath 41 of this second embodiment has a valve body 42
is fixed to the sheath insertion pipe 12, and a sheath body 43 having a water supply port 16 and a drain port 17 protruding from the valve body 4
It is fitted onto the outer periphery of 2 so as to be movable back and forth. Above and below the cylindrical portion of the valve body 42 on which the sheath body 43 slides, a water supply hole 34 and a drainage hole 35 are provided so as to be shifted back and forth. The rest of the structure is substantially the same as that of the first embodiment, and the same elements are denoted by the same reference numerals.

Therefore, the bottle 32 of the valve body 42 is bent 30b on the rear side.
In the state shown in FIG. 7 when the water supply port 16 is stored in the water supply hole 34,
It can be set to the water supply state according to the position of Also, from the illustrated state, press the fixation release button 28 to move the sheath body 43 rearward as shown by the arrow, and release the bottle 3 of the valve body 42.
2 is stored in the front recess 30a (path shown), the water supply port 16 is closed, while the drain port 17 is
overlaps the position of the drainage hole 35' so that it can be placed in a drainage state.

The effects of the second embodiment are substantially the same as those of the first embodiment.

In each of the embodiments described above, the cock 18 is installed on the side of the water supply port 16, but it can also be installed on the side of the drain port 17.

Further, in each of the above-mentioned embodiments, each notch 29 was provided with two recesses 30a and 30b in the front-rear direction, but three recesses were provided in the front-rear direction, and for example, the bottle 32 was provided at the center position. When stored, the water supply and drainage ports 16 and 17 can be set to a blocked state, and the recess positions on both sides can be set to either the water supply state or the drainage state, as in each of the above-mentioned embodiments. You can also do it like this.

When three locations are provided in this manner, the cock 18 and the like may not be necessary.

It should be noted that the water supply port 16 and the drain port 17 do not have to be provided at vertically opposing positions; for example, they may be provided offset in the vertical direction, or in almost any direction other than the vertical direction. It is also possible to provide one.

The present invention is not limited to sheaths used in resectoscopes (prostate resections), but can be used in cystourethroscopes and other rigid endoscopes.

[Effects of the Invention] As described above, according to the present invention, a water supply and drainage switching means is formed which can switch the water supply and drainage by moving the movable valve body or sheath body back and forth by pressing a button. At the same time, since each switching position can be set in a locked state that does not move, it is possible to easily switch the water supply and drainage, and to realize a highly reliable switching means for the water supply and drainage that will not be accidentally changed during use.

[Brief explanation of the drawing]

Figures 1 to 6 relate to the first embodiment of the present invention.
The figure is a longitudinal sectional view of the first embodiment, FIG. 2 is a side view of FIG. 1,
Fig. 3 is a sized Milf I side view showing the structure of the valve body connection part with the bottles inserted in the front and rear recesses, and Fig. 4 is a cross-sectional view taken along line A-A in Fig. 3(a). , FIG. 5 is a perspective view showing the outer shape of the valve body, FIG. 6 is a vertical cross-sectional view showing the first embodiment set in a state where water can be fed and water can be drained, and FIG. 7 is a second embodiment of the present invention. 5uIi side view of the embodiment, FIG. 8 is a side view of the conventional example, and FIG. 9 is a sectional view taken along the line B-B in FIG. be. 11.41... Rigid endoscope sheath 12... Sheath insertion pipe 13.43... Sheath body 14.42... Valve body 16... Water inlet 17.
... Drain port 18 ... Cock 19 ... Valve body connection section 20 ... Reject handle 21 ... Handle connection section 24 ... Guide bin 2
6... Connection ring 27... Spring 28...
Fixation release button 29...notches 30a, 30b
-<Hole 32...Bin 34...Water supply hole 35
... Drainage cut-out Figure 6 (0)

Claims (1)

[Scope of Claims] An insertion pipe section that can be inserted into the rest cavity, a water supply port for supplying irrigation fluid into the body cavity through the hollow section of the insertion pipe section, and a water port for discharging the irrigation solution. A rigid endoscope sheath comprising: a sheath main body provided with a drainage port; A rigid device characterized in that a valve body is provided to allow the water supply port and the drainage port to communicate with the hollow part of the insertion pipe part in a state where the water supply port and the drainage port are respectively locked in the main sheath part, thereby making it possible to switch the water supply and drainage. Endoscope sheath.