JPS61185241A - Sheath for rejectoscope - 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 sheath for a resectoscope that makes it easy to confirm the position of a water inlet with respect to the sheath body.

[Technical background of the invention and its problems]

In recent years, endoscopes have been widely used, which allow observation means to be provided at the distal end of an elongated insertion portion to allow observation of the inside of a body cavity without making an incision, and for therapeutic treatment using a treatment instrument.

The above-mentioned endoscope is a flexible endoscope whose insertion part is flexible and can be inserted through a curved insertion route such as the esophagus.

It is broadly classified into rigid endoscopes, which have a rigid and straight insertion section.

The above-mentioned rigid endoscope has a rigid insertion section, so it has excellent shooting performance, and also has the advantage of being able to obtain a clear image with high resolution because it can use a relay lens system as an image transmission means.

The rigid endoscope mentioned above includes a resectoscope for prostate resection.

The resectoscope is generally used by being inserted through a hollow sheath.

FIG. 11 shows a conventional resectoscope sheath 1 disclosed in Dokushitsu No. 1980313.

In the above conventional example, a removable part 3 to which a resect handle (not shown) can be detachably attached is formed at the rear end of the hollow and elongated sheath insertion part 2, and a water supply port 4 is provided adjacent to the removable part 3. is drilled.

The water supply port 4 is attached to a rotating ring 6 having a tapered inner wall surface on the outer periphery of a tapered part of the sheath body 5, and this rotating ring 6 is attached to the outer periphery of a small diameter end of the tapered part of the sheath body 5. It is rotatably supported by a presser nut 7.

. Therefore, this presser foot 7 is parallel to the central axis of the sheath 2.

A horizontal hole opening on the side facing the front end of the rotary ring 6 is formed, and an elastic body 8 and a ball 9 are housed in the horizontal hole in a state where the ball 9 is biased in the direction of protruding from the opening. The rotating ring 6 is rotated by the ball 9 which is biased to
The rotary ring 6 is attached in a state where it is pressed and its tapered inner wall surface is in close contact with the tapered outer circumferential surface of the sheath body, and the rotary ring 6 is rotatable.

In the conventional sheath 1 described above, the rotating ring 6 is connected to the sheath body 5.
When performing surgery using a resect scope, it is necessary to view the scope to confirm the rotational positional relationship between the water supply port 4 attached to the rotation ring 6 and the sheath body 5. This had the disadvantage that it could only be confirmed by stopping the camera, removing the eye from the eyepiece window, and looking at the outer periphery of the sheath body.

[Purpose of the invention]

The present invention has been made in view of the above-mentioned points, and an object of the present invention is to provide a sheath for a resect scope that allows the positional relationship of a water inlet to the sheath body to be confirmed without seeing it with the naked eye.

[Summary of the invention]

The present invention provides a click engagement mechanism that operates in accordance with the rotation of the rotary ring, which is rotatable around a sheath body provided with an attachment/detachment portion that allows the resect scope to be attached. A tuning fork that can be clicked is used to confirm the location of the installed water inlet.

[Embodiments of the invention]

Hereinafter, the present invention will be specifically described with reference to the drawings.

1 to 3 are kept as the first embodiment of the present invention, and the first embodiment is
The figure shows a partial periphery of the attachment of the sheath body and rotation ring in the first embodiment, and FIG. 2 shows the entire configuration when the resect handle and scope are attached to the first embodiment.
FIG. 3 shows the appearance of the first embodiment.

The resect sheath sheath 11 of the first embodiment includes a hollow tubular sheath insertion portion 12 and a ridged portion of the sheath insertion portion 12 fixed to a large-diameter sheath body 13. As shown in FIG. 2, a detachable portion 15 is provided at the rear of the sheath main body 13, to which a retract handle 14 can be detachably attached. This resect handle 14 is designed so that an observation telescope (optical viewing tube) 16 can be detachably attached to it from the rear side.

The telescope 16 is attached to the select handle 14 from its first side, and its elongated insertion portion passes through the guide vibe 17 of the select handle 14.

Furthermore, it is designed to be able to be inserted into the interior of the sheath insertion portion 12 up to the vicinity of the open front end, so that the front can be observed through the opening. In addition, this select handle 14 connects a fixed member 18 and a sliding member 19 with a leaf spring 20,
The finger rest on the fixed member 18 side and the finger rest 2 on the sliding member 19 side
1 by applying a force to attract the sliding member 19
can be moved to the front fixed member 18 side,
By this movement operation, the electrode 22 whose rear end is attached to the sliding member 19 also moves, and the tip of the electrode 22, which is normally stored inside the opening of the sheath insertion part 12, protrudes from the opening to perform therapeutic treatment such as resection. It is now possible to do so.

By the way, after the sheath 11 of the first embodiment is rotatably fitted from the sheath, the rotating ring 25 is fitted with the presser nut 26.
It is attached so that it will not come off.

A through hole is formed in the radial direction in the portion of the rotating ring 25 where the water supply port 24 protrudes, and a circumferential groove 27 is formed in the narrow diameter portion of the sheath body 13 facing the through hole. A hole 28 in the radial direction communicating with the hollow part inside the sheath body 13 is formed at an appropriate location (single or plural) of this circumferential groove 27, so that the sheath 12 can be opened at any rotational position of the water supply port 24. This allows water to be conveyed through the hollow part.

Also, a circumferential groove Vcd is formed in the narrow diameter portion of the sheath body 13 on both sides of the circumferential groove 270, and a watertight sealing member 29.2 is formed.
9 is stored in a circle.

Further, the rotary ring 25 is provided with a hole parallel to the central axis of the rotary ring 25, and inside this hole is a click rod 30 and an elastic body such as a spring that biases the click rod 30 backward. 31 is stored and fastened with a nut 32.

The base side of the click rod 30Fi is urged backward by the elastic body 31.

Since the tip 33 of the click rod 30 is a comb smaller than the diameter of the hole, the tip 33 is pressed against the stepped surface of the sheath body 13 and is prevented from protruding. As shown in FIG. 1, a depression 34 is formed in the source body 13 at a portion where the tip 33 of the click rod 30 comes into pressure contact when the first water supply port 24 is directly above the sheath body 13. Therefore, the click bar 30 protrudes only from the stem in this state.
The click engagement mechanism housed in the IT holder 34 operates,
When the click rod 30 protrudes into the recess 34 and collides with the inner surface of the recess 34, the click rod 30 responds by sound or photography, or when the click rod 30 rotates along the inner surface of the recess 34.
When retracting the water supply port 24, it is possible to know without visually confirming that the water supply port 24 is directly above the sheath body 13 from a maneuver that requires greater strength than before.

According to the first embodiment configured in this way, the water supply port 24
When the click bar 30 is set, for example, directly above the sheath body 13, the tip 33 of the click rod 30 housed inside the rotary ring 25 protrudes into the recess 34 of the sheath body 13, so that it collides and is engaged. The positional relationship of the water inlet 24 with respect to the sheath body 13 can be confirmed without visual confirmation from the sound or vibration when the water inlet 24 is stored in the recess 34 or the difference in rotational force.

4 and 5 show the main parts of a sheath body in a second embodiment of the present invention.

In the first embodiment, the water inlet 24 is connected to the sheath body 1.
3, the click rod 30, which is biased by an elastic body 31, is made to protrude into a hole provided at an appropriate location in the one-rotation ring 25 and be housed in the neck 34, for example, when the ring is in the directly above position. In this second embodiment, the water supply port 2
4 reaches directly above the sheath body 136C, for example,
Similar to the first embodiment, two lick engagement mechanisms are provided to operate.

That is, as shown in FIG. 4 or FIG.
Holes in the direction parallel to the center axis of the rotary ring 25 are provided in two locations symmetrically with respect to the center of the ring 25, and click rods 30a, 30b and elastic bodies 31a, 31b are housed therein. Prevents the elastic body etc. from coming off.

Also, when the water supply port 24 reaches, for example, directly above the sheath body 13 (in the direction perpendicular to the page in FIG. 4), each click bar 3
0a and 30b are designed such that their respective tips 33a and 33b protrude into and are housed in respective recesses 34a and 34b provided in the sheath body 13.

By providing the click engagement mechanisms in two symmetrical positions, each click bar 30a, 304) is pressed against the sheath body 13, and the rotation ring 25 is pushed closer to the sheath body 13 than in the case of only one click engagement mechanism. can be prevented from tilting with respect to the central axis.

In the second embodiment, instead of the recesses 34a and 34b or the recesses, grooves extending in the direction perpendicular to the central axis of the sheath 11' may be used.

In each of the above-described embodiments, the click engagement means is not limited to the one in which the click engagement means is activated when the water inlet 24 is located directly above the sheath body 13, but the water inlet 24 is not only formed in a predetermined position such as directly below or directly beside the sheath body 13. That's fine.

FIG. 6 shows the periphery of the sheath body in a third embodiment of the present invention.

In the second embodiment, the click bar 30a.

30b is formed equidistant from the center of the rotating ring 25, so the rotating ring 25 is 18
The click engagement mechanism was activated every time it was rotated by 0°. On the other hand, in the third embodiment, a thick rotating ring 41 is used, and the rotating ring 41 is similar to the second embodiment.
Holes parallel to the central axis of the rotary ring 41 are provided at positions facing each other on a straight line passing through the center of the rotary ring 41, but at different distances from the center.
0b and the elastic bodies 31a, 31b, and the nut 32a.
, 32b to prevent the elastic bodies 31a, 31b from coming off. When the water supply port 24 reaches a predetermined position, such as directly above the sheath body 13, the tips 33a and 33b of the click rods 30a and 30b are connected to the sheath body 13.
It is designed to protrude and be engaged with recesses 34a and 34b formed in the.

The rest of the structure is the same as that of the second embodiment, and the same elements are designated by the same reference numerals.

According to the third embodiment constructed in this way, each click bar 30a, 30b is provided at a different distance from the center of the rotating ring 41, so that each click bar 30a.

Since the recesses 34a and 34b in which the tips 33a and 33b of the sheath body 13 can be accommodated are also formed at different distances from the central axis, the water inlet 24 can be clicked only when it reaches a certain position with respect to the sheath body 13. The engagement mechanisms are activated at the same time. Further, as in the second embodiment, since the click engagement mechanism or the click rods 30a and 30b are pressed against each other on both sides of the center, it is possible to prevent the rotary ring 41 from tilting.

In this embodiment as well, the recesses 34a and 34b may be replaced by grooves extending perpendicularly to the central axis direction of the sheath 11. In addition, in this third embodiment, both elastic bodies 31
It is also possible to change the biasing forces of a and 31b so that the moment of force acting on the sheath body 13 becomes equal.

7 and 8 show the main parts around the sheath body in a fourth embodiment of the present invention.

In this fourth embodiment, as in the first embodiment, a click rod 30° elastic body 31.
The nut 32 that holds the elastic body 31 is attached to the rotating ring 2.
Incorporated parallel to the central axis of 5.

In addition, a water inlet 24 is provided in the sheath body 13 .
In addition to forming a large depression 51a at one location where the tip 33 of the click rod 30 hits when it reaches a predetermined position, such as directly above the sheath body 13, When the tip 33 of the click bar 30 hits the predetermined position, small depressions 51 are formed at several locations.
b, 51b, . . . are provided. Therefore, the water supply port 24
When the water inlet 24 reaches a predetermined position, such as directly above the sheath body 13, the click is strong and clear.On the other hand, when the water inlet 24 reaches another predetermined position, such as directly beside or below the sheath body 13, there is no click. Weak handedness, water inlet 24 and sheath body work 3
There are buttons so that you can check the positional relationship with the camera at several locations.

FIG. 9 shows the periphery of the sheath body in a fifth embodiment of the present invention.

In this fifth embodiment, a rotary ring 61 with a small thickness (thin wall) is used, and a click bar or the like is not provided on the rotary ring 61, instead of a rotary ring 611C.

A click cylinder 62 is provided to protrude in the radial direction of the tab toward the central axis of the rotating ring 61. This click tube 62
A click rod 302, an elastic body 31, and a nut 32 for holding the elastic body 31 are installed inside.

The tip 33 of the click rod 30 is biased to pop out inside the rotating ring 61. On the other hand, the sheath body 13 is provided with a recess 34 at a position where the tip 33 of the click rod 30 hits when the water supply port 24 reaches a predetermined position such as directly above the sheath body 13.

Incidentally, instead of the depression 34, a long groove parallel to the central axis of the sheath 11 may be used.

In this fifth embodiment, the rotary ring 61 can be made thinner and lighter, making it easier for the operator to operate. Furthermore, the sheath body 13 can also be made lighter. Further, processing and assembly is easier than storing a click engagement member in the sheath body 13.

The tenth factor shows the main parts around the sheath body in the sixth embodiment of the present invention.

In each of the above-mentioned embodiments, the click rod was directly biased by one elastic body, but in this embodiment, a thin-walled rotary ring 71 is used, and this rotary ring 71 rotates one rotation with its presser nut 26. 0 interposed between the ring 71
An elastic body 72 such as a ring urges the sheath 11 toward the attachment/detachment portion 15 on the rear side.

On the other hand, a protrusion 73 is provided on the end surface of the rotary ring 71 on the side of the sheath attachment/detachment part 15. On the other hand, when the water supply port 24 reaches a predetermined position, such as directly above the sheath body 13, the sheath body 13 has a protrusion 73. A recess 74 is provided at the portion where the portion 73 abuts, so as to act as a click engagement means.

Note that the recess 74 may be a long groove in the direction perpendicular to the race center axis, and is not limited to one, but may be a plurality of recesses.

Further, by changing the size of the recess 74, the strength of the click engagement mechanism may be changed. The elastic body 72 is not limited to an O-ring, but may include a plate made of silicone rubber, etc.
A sub-IJ washer or the like may also be used.

Alternatively, the protrusion 73 may be provided on the sheath body 13 side, while the recess 74 may be provided on the rotating ring 71 side.

Note that the present invention is not limited to sheaths for resectoscopes, but can be widely applied to sheaths in which a water inlet is rotatably attached to a sheath body. Moreover, it can be applied not only to water supply but also to chest effusions or those that are used for both purposes.

〔Effect of the invention〕

As described above, according to the present invention, for the sheath body,
When the rotating ring to which the water inlet is attached is rotated and the water inlet reaches a predetermined position, a click engagement mechanism is activated between the 5-turn ring side and the sheath body, so the position of the water inlet can be adjusted easily. Without visual confirmation, it is possible to easily confirm whether the water supply port is located directly above, directly to the side, directly below, etc. by the sound or vibration when the click is activated.

[Brief explanation of the drawing]

Figures 1 to 3 relate to the first embodiment of the present invention.
The figure is a partially cutaway side view of the sheath body to which the rotary ring is attached in the first embodiment, Figure 2 is a side view showing how the resect handle etc. are attached, and Figure 3 is the first embodiment.
FIG. 2 is a side view showing an example. 4 and 5 show the main parts of the second embodiment of the present invention, FIG. 4 is a partially cutaway side view of the sheath body on which the rotating ring is attached, and FIG. 5 is the main part of the second embodiment of the present invention. A sectional view taken along the line A-A, FIG. 6 is a side view with a part of the sheath main body cut away in the third embodiment of the present invention, and FIGS. 7 and 8 relate to the third embodiment of the present invention. Fig. 7 is a side view showing the sheath body with a part cut away, Fig. 8 is a perspective view showing the sheath main body with the rotating ring removed, and Fig. 9 is a partially cut away view of the sheath main body in the fifth embodiment of the present invention. FIG. FIG. 1θ is a partially cut-away side view of the sheath body according to the sixth embodiment of the present invention, and FIG. 11 is a partially cut-away side view of the sheath body of the conventional example. 11... Sheath, 12... Sheath insertion part,
13...Sheath body, 14...Resect handle, 16...Telescope, 24...Water inlet, 2
5... Rotating ring, 26... Presser nut. 30...Click rod, 31...Elastic body. 32...nut, 34...dent, 51a
, 51b... depression, 72... elastic body, 73...
Protrusion, 74.--indentation. Fig. 6 Fig. 7 A Fig. 8 Fig. 9 61 32 b2 15 Proceedings I (voluntary) July 2, 1985 1, Indication of the case 1985 Patent Application No. 24211 2, Invention Name Sheath for resectoscope 3, Relationship with the person making the amendment Patent applicant representative Satoshi Shimoyama Dept. 5 Date of amendment order (voluntary) 1. In the 18th line of page 3 of the middle box of the specification: “ ``To confirm...'' is ``To confirm...''
I will correct it. 2. On the 12th line of page 4 of the statement box, the text "...hands-on, etc." has been corrected to [...hands-on, etc.J]. 3. On the 12th line of page 5 of the statement box, correct "...front side..." to "...rear side...". that's all

Claims (1)

[Claims] A sheath insertion part into which an optical viewing tube for observation is inserted, a detachable part into which a resect handle is detachably attached to the rear side, and a sheath body part which is rotatably provided with a rotary ring from which a water supply port is protruded. A resectoscope sheath comprising: a click engagement mechanism between the rotary ring and the sheath main body as the rotary ring rotates.