JPH0322767B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a rigid endoscope device that allows a treatment instrument to be used smoothly.

[Technical background of the invention and its problems] In recent years, by providing an observation optical system on the distal end side of the elongated insertion section, it has become possible to diagnose the affected area and treat it with a treatment instrument without the need for an incision. Endoscopes that can perform these functions are now widely used.

By the way, these endoscopes are roughly divided into flexible endoscopes with flexible insertion sections and rigid endoscopes with rigid insertion sections.

Although the above-mentioned rigid endoscope cannot be inserted through a curved path like a flexible endoscope, it has good aiming ability and does not use a fiber bundle as an image transmission means of the observation optical system, and has a relay lens. Since the system can be used, clear images with high resolution can be obtained, which is effective for diagnosis, etc.

By the way, among these rigid endoscopes is a cystourethroscope for diagnosing and performing therapeutic treatments on parts related to the bladder and urethra.

The cystourethroscope described above generally has a bridge removably connected to the rear end of a sheath serving as a hollow guide tube.
A device is used in which a telescope, catheter, forceps, and other treatment tools are guided from the rear of the bridge into the sheath through the bridge.
By the way, if it is necessary to remotely control the tip of the treatment instrument from the hand side, use a scope guide pipe installed in front of the scope insertion port body and a bridge equipped with a remotely controllable elevator at the end of the scope guide pipe. However, if there is no need to operate the treatment instrument remotely, for example, Utility Model Application No. 14992
As proposed in Japanese Utility Model Application No. 60-128603, a bridge without a scope guide pipe and a treatment instrument elevator is sometimes used.

FIG. 9 shows a side view of the bridge 1 proposed in the above-mentioned prior art example, and FIG. 10 shows a schematic plan view of the bridge 1 with the treatment instrument 2 inserted therein.

That is, in this bridge 1, a treatment instrument insertion port body 4 into which a treatment instrument 2 can be inserted is formed below a scope insertion port body 3 into which a scope is inserted. This treatment instrument insertion port body 4 is provided to protrude diagonally downward at a certain angle with respect to the scope insertion direction so as not to interfere with scope insertion.

However, in this case, when the treatment instrument is inserted through the treatment instrument insertion port body 4, when it protrudes forward from the front end 1A of the outlet section of the bridge 1 as shown in FIG. Since there is no member to guide the treatment instrument 2 in the direction, the distal end 2A of the treatment instrument 2 comes into contact with the inner wall surface 5A of the tapered part of the sheath 5, and there is a problem that insertion cannot be performed as desired. Particularly when using a treatment instrument 2 with a small diameter, the degree of abutment may be so severe that the tip of the treatment instrument 2 may be deformed, making it impossible to perform treatment operations effectively.

[Object 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 rigid endoscope device that can be smoothly inserted while preventing the tip of the treatment instrument from hitting the tapered portion of the sheath. shall be.

[Summary of the Invention] The present invention provides a guiding member for guiding the treatment instrument toward the inner side of the hollow tube portion of the sheath at the exit portion of the treatment instrument insertion port body of the bridge. It is designed to prevent bumping and allow smooth insertion.

[Embodiments of the Invention] The present invention will be specifically described below with reference to the drawings.

1 to 4 relate to the first embodiment of the present invention, FIG. 1 shows the appearance of the bridge which is the main part of the first embodiment, and FIG. 2 shows the cystourethroscope of the first embodiment. FIG. 3 shows the exit section of the bridge, and FIG.
The figure shows how the treatment instrument is inserted into the bridge.

The cystourethroscope 11 of the first embodiment has an appearance shown in FIG. 2 when assembled.

That is, the sheath 12 has an elongated hollow tube section 13, and the front end of this tube section 13 is formed with an opening 12A for observation and treatment instruments. This sheath 12
has an irrigation port 14 protruding from its rear side,
The sheath 1 is inserted through the irrigation port 14 by operating the cot.
It is possible to introduce perfusion fluid into the tube.

Further, a bridge 17 is connected to the rear part of the sheath 12 by a connecting part 16 using a rotatable ring 15.
can be detachably connected to the rear part of the sheath 12.

Therefore, a telescope (optical viewing tube) 18 for observation is detachably attached to the rear side of the bridge 17 to form a cystourethroscope 11 as a rigid endoscope device.
is now ready to be assembled.

By the way, the bridge 17 has the structure shown in FIG.

This bridge 17 is a cylindrical block on its front end side, and a connection part 19 to the sheath 12 is formed.
A tapered portion 20 formed at the front portion of the connecting portion 19 and having a smaller diameter forward is fitted into the connecting portion 16 of the sheath 12 for connection. This connection part 1
A tubular scope insertion port body 21 is formed on the rear side of the telescope 9 so that the insertion portion of the telescope 18 can be inserted thereinto, and a treatment instrument 22 can be inserted into the lower side of this scope insertion port body 21. A treatment instrument insertion port body 23 is formed. The scope insertion port body 21 has a straight tube shape, and a connecting portion 24 for attaching the telescope 18 is formed at the rear thereof. When the telescope 18 is attached, the insertion portion of the telescope 18 is inserted into the sheath 12. is inserted through the opening 12A so that the affected area in front can be observed.

Further, a treatment instrument insertion port body 23 formed on the lower side of the scope insertion port body 21 projects obliquely downward, and one or more insertion port bodies 23 are provided as shown in the figure. This treatment instrument insertion port body 2
There is a Kotoku 25 near the insertion port of 3 so that it can be opened and closed.
is provided.

By the way, in the front part of the bridge 17, the distal end outlet part 26 of the scope insertion port body 21 is formed to slightly protrude from the tapered part 20, and this part is formed by the sheath 12.
When attached to the sheath 12, the telescope 1 is fitted into the rear inner wall of the hollow tube part 13 of the sheath 12.
It is designed so that the insertion section 8 can be inserted therethrough.

On the other hand, at the outlet 27 of the treatment instrument insertion port body 23, the inserted treatment instrument 22 smoothly passes through the outlet 27 into the hollow tube section 13 of the sheath 12 and is guided toward its distal end. For example, two guide rods 28, 28 each having a circular cross section are provided to protrude from the upper side of the inner wall of the outlet portion 27 as guide members or guide members for this purpose. These guide rods 28,
As shown in FIGS. 3 and 4, 28 is formed symmetrically on the lower circumference of the outlet portion 26 of the scope insertion port 21, parallel to the axis of the scope insertion port 21. . As shown in FIG. 3, the outlet portion 27 of the treatment instrument insertion port body 23
(Exit part 26), the upper center side has a concave curved surface 29, and if the guide rods 28, 28 are not formed, when the treatment instrument 22 is protruded from this exit part 27, the above-mentioned concave These guides prevent the tip of the treatment instrument 22 from passing through the center portion due to the curved surface 29 and being biased toward one of the recesses on both sides, resulting in the tip of the treatment instrument 22 hitting the tapered inner wall surface of the sheath 12. The rods 28, 28 prevent this.

In other words, the concave curved surface 29 with these guide rods 28, 28
By preventing the formation of recesses that would cause the treatment instrument 22 to be biased on both sides of the guide rods 28, and by guiding the tip of the treatment instrument 22 by bringing it into contact with the inside of both guide rods 28, 28, as shown in FIG. Since the inserted treatment instrument 22 can be guided into the hollow tube part 13 of the sheath 12 as shown in FIG.
This eliminates the possibility of abutting against the tapered inner wall surface 30 of the sheath 12 when it is protruded from the outlet portion 27 of the sheath 12. The guide rods 28, 28 may be made of, for example, a Ni-Cu alloy, and may be fixed to the outer periphery of the outlet 26 of the scope insertion port body 21 by soldering or brazing, or by using other adhesives. You may do so. Further, the material may be other metal or plastic, and the cross-sectional shape may not be circular.

According to the cystourethroscope 11 of the first embodiment configured as described above, the guide rods 28 and 2 provided at the outlet portion 27 of the treatment instrument insertion port body 23 in the bridge 17
8, when the treatment instrument 22 is advanced, it can be guided smoothly into the hollow tube portion 13 of the sheath 12. Therefore, it is possible to eliminate the problems in the conventional example, such as time-consuming treatment operations and damage to the distal end side of the treatment instrument 22.

FIG. 5 shows a bridge 31 in a second embodiment of the invention.

In this embodiment, the guide rods 28, 28 are not provided on the bridge 17 in the first embodiment, and the treatment instrument insertion port body 23 is used as a guide member for the treatment instrument.
A guide pipe 32 is provided protruding from the outlet portion 27 of.

In the case where the guide pipe 32 is made to protrude forward from the tapered part 20 and provided so that its tip reaches the hollow tube part in front of the tapered inner wall position of the sheath 12, The treatment instrument can be guided into the hollow tube portion 12 of the sheath 12 without its tip hitting the tapered inner wall surface of the sheath. The configuration of other parts is the same as that of the first embodiment, and is indicated by the same reference numerals.

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

FIG. 6 shows the distal end side of the bridge in a third embodiment of the present invention.

This bridge 41 is similar to the guide pipe 3 provided at the outlet portion 27 of the bridge 31 in the second embodiment.
2, only the upper half of the guide portion 42 is left in the shape of a roof.

This effect is also substantially the same as that of the first embodiment.

FIG. 7 shows the front end of the bridge in a fourth embodiment of the invention in front view.

In this embodiment, the scope insertion port body outlet portion 51
and the guiding member 52 are integrally formed. For example, the guide member 52 that fits into the inner wall of the tapered portion 20
A through hole communicating with the scope insertion port body 21 is formed on the upper side of the hole to form a scope insertion port body outlet body 51, and a through hole having a substantially square cross section and communicating with the treatment instrument insertion port body 23 is formed on the lower side thereof. A through hole (or groove) is provided to form a guide means for the treatment instrument at the outlet portion 53 of the treatment instrument insertion port body 23. As shown in FIG. 8, this guide member 52 is made to protrude so that its front end reaches the hollow tube portion of the sheath 12. The effects of this embodiment are also substantially the same as those of the third embodiment.

Note that the guide member 52 may be formed into a pipe.

In the above-mentioned embodiments, the bridge forming the cystourethroscope is provided with a guiding means or guide means for the treatment instrument, but the present invention is not limited to the bridge forming the cystourethroscope, but is also applicable to insertion of the treatment instrument into the sheath. The present invention can be widely applied to rigid endoscope devices in which a bridge provided with a mouth body is attached, and a telescope is further attached from behind the bridge.

[Effects of the Invention] As described above, according to the present invention, since the guide means for guiding the treatment instrument to the hollow tube section of the sheath is provided at the outlet of the treatment instrument insertion port body of the bridge, the treatment instrument It is possible to prevent the distal end side of the treatment instrument from being damaged by preventing it from hitting against the tapered inner wall of the sheath, and it is possible to perform the treatment operation smoothly.

[Brief explanation of the drawing]

1 to 4 relate to the first embodiment of the present invention, FIG. 1 is a side view showing the bridge in the first embodiment, FIG. 2 is a side view showing the cystourethroscope of the first embodiment, FIG. 3 is an enlarged front view of the front part of the bridge, FIG. 4 is a plan view showing the treatment instrument inserted into the treatment instrument insertion opening of the bridge, and FIG. 5 is a second embodiment of the present invention. A side view showing the bridge in
FIG. 6 is a side view showing the vicinity of the exit part of the bridge in the third embodiment of the present invention, and FIG. 7 is the fourth embodiment of the present invention.
A front view showing the exit part of the bridge in the example,
8 is a plan view of the bridge of FIG. 7, FIG. 9 is a side view of the conventional bridge, and FIG. 10 is a plan view of the conventional bridge with a treatment tool inserted. 11... Cystourethroscope, 12... Sheath, 13...
... tube part, 17 ... bridge, 18 ... telescope, 20 ... taper part, 21 ... scope insertion port body, 22 ... treatment instrument, 23 ... treatment instrument insertion port body,
26... Outlet part, 27... Outlet part, 28... Guide rod, 32... Guide pipe, 52... Guide member.

Claims (1)

[Claims] 1. It has an elongated hollow tube part, and the front part of this tube part is provided with openings for observation and treatment tools, while the rear part thereof has a hollow sheath with a connecting part. , has a sheath connection part that fits into and connects to the connection part of the sheath, and a scope insertion port protrudes from the rear of the sheath connection part, and expands toward the rear with respect to the scope insertion port body. a bridge having a treatment instrument insertion port body protruding from the sheath connection portion in an oblique direction and detachably connected to the sheath; a telescope inserted into the hollow tube portion of the sheath through the scope insertion port body; a guide means provided at the outlet of the treatment instrument insertion port body of the bridge for guiding the distal end of the treatment instrument inserted from the treatment instrument insertion port body toward the inside of the hollow tube portion of the sheath; A rigid endoscope device characterized by: