JPS63277026A - Rigid endoscope - Google Patents

Abstract

PURPOSE:To eliminate that the insertion of treatment instruments becomes impossible because of mutual collision or the positional relation between them is not constant, by providing one treatment instrument so as to shift the center axis of the mouth thereof from that of the mouth of the other treatment instrument. CONSTITUTION:When an ultrasonic probe 15 is inserted from the first tube body 9 and a basket catheter 16 is subsequently inserted from the second tube body 11, the axial line (a) of the first tube body 9 of a connection mouth body 8 and the axial line (b) of the second tube body 11 are shifted by a dimension (d) in the lateral direction crossing the vertical line (c) of the connection mouth body 8 at a right angle and the basket catheter 16 is positioned on the left side of the ultrasonic probe 15 when looked on the leading end side of an insert part 2. Moreover, because of the presence of the shift dimension (d), it is prevented that the insertion of the basket catheter 16 becomes impossible by the collision with the ultrasonic probe 15. Therefore, the ultrasonic probe 15 can be smoothly inserted into a treatment instrument pipe 22.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a rigid endoscope having a plurality of treatment instrument openings for inserting treatment instruments into its main body.

rPrior art] In recent years, rigid endoscopes have been used to endoscopically observe and photograph lesions, stones, etc. in body cavities, and various treatment tools have been used in conjunction with biopsies, stone removal, etc. It is known that the treatment of Some of these rigid endoscopes have a straight treatment instrument passageway in which a rigid treatment instrument can be used. In addition, in order to allow a plurality of treatment instruments to be used at the same time, some treatment instrument passages are provided diagonally with respect to the straight treatment instrument passage.

Conventionally, a structure shown in FIGS. 6 to 8 has been common as a rigid endoscope having two treatment instrument passages. That is, in FIG. 6, 1 is a main body, and an insertion part 2 made of a hard pipe is connected to the distal end surface of this main body 1. A light guide optical system and an image guide optical system (not shown) are provided within the insertion section 2. Further, a connecting portion 3 is formed at the distal end of the main body portion 1, and a sheath 4 shown by a chain line in the figure is detachably attached to this connecting portion 3.

The main body part 1 is provided with a light guide cap 5 and is connected to one end of an eyepiece part 6. The light guide optical system is optically connected to the light guide cap 5, and the image guide optical system is optically connected to the eyepiece 6. An eyepiece 7 is connected to the other end of the eyepiece 6, and by looking through the eyepiece 7, the optical image transmitted to the image guide optical system can be observed.

This connection port body 8 includes a first tube body 9 forming a first treatment instrument port whose one end is fitted into the main body portion 1, and this first tube body 9.
A second tubular body 11 forming a second treatment instrument port and having one end connected to one end thereof. The first tube body 9
The axis a of the second tube 11 substantially coincides with the axis of the main body 1, and the axis a of the second tube 11 is inclined at an angle α with respect to the axis a of the first tube 9. When the connection port body 8 is viewed from the proximal end side as shown in FIG. 8, these axes aSb are
They are located on the same vertical line C. Therefore, the axis A coincides with the axis a at the point X shown in FIG.

Each tube 9.1 is attached to the other end of each tube 9.11.
A cap 14 is provided with a cock 12 to maintain liquid tightness of the cap 1, and has a through hole 13 in the opening at the other end.
is fitted. Then, with the cock 12 open, an ultrasonic probe 15, which is a hard treatment instrument, is fluid-tightly inserted into the first tube 9 through the through hole 13 of the cap 14, and inserted into the second tube 11. Similarly, a basket catheter 16, which is a soft treatment tool, is inserted in a fluid-tight manner.

Incidentally, such prior art is disclosed in Japanese Patent Application Laid-open No. 176-1983.
There is one shown in Publication No. 323.

[Problems to be Solved by the Invention] By the way, in the rigid endoscope having the above structure, when the ultrasonic probe 15 and the basket catheter 16, which are treatment instruments, are used at the same time, the first The axes a and b of the tubular body 9 and the second tubular body 11 shown in FIG. 7 are located on the same vertical line C shown in FIG.
Since they coincide at the X point shown in the figure, the basket catheter 16 inserted from the second tubular body 11 may collide with the ultrasound probe 15 inserted from the first tubular body 9, making it impossible to insert the probe. When these treatment tools are inserted into the sheath 4 from the main body 1, it is not fixed whether the basket catheter 16 is positioned on the left or right side of the ultrasound probe 15, which may reduce operability. Ta.

This invention was made based on the above-mentioned circumstances, and its purpose is that when multiple treatment instruments are inserted and used at the same time, the instruments collide with each other and cannot be inserted, or are inserted. An object of the present invention is to provide a rigid endoscope that prevents the positional relationship from becoming inconsistent in a fixed state.

[Means and operations for solving the problems] In order to solve the above problems, the present invention provides a rigid endoscope having at least two or more treatment tool ports, in which the central axis of at least one treatment tool port is By arranging the treatment instruments offset with respect to the center axis of the other treatment instrument openings, it is possible to prevent the treatment instruments from colliding with each other and not being able to be inserted, or from having inconsistent positional relationships.

[Embodiment 1] An embodiment of the present invention will be described below with reference to FIGS. 1 to 3. Incidentally, the same parts as those shown in FIGS. 6 to 8 are given the same symbols, and the description thereof will be omitted. That is, in this invention, the first
As shown in FIG. , the second
The difference is that the axis of the tube body 11 is shifted by a dimension d in the lateral direction perpendicular to the vertical line C.

In addition, on the outer peripheral surface of the tip of the connection port body 8, there is a first O-ring 21 that maintains liquid tightness with the main body part 1, and on the inner peripheral surface, there is a treatment instrument pipe 22 connected thereto, as shown in the opening diagram. It has an almost semi-cylindrical cross-sectional shape.

According to the rigid endoscope having such a structure, for example, when the ultrasound probe 15 is inserted from the first tube 9 and the basket catheter 16 is inserted from the second tube 11,
The axis a of the first tube 9 of the connection port body 8 and the second tube 11
The axis of the basket catheter 16 is deviated by a dimension d in the lateral direction perpendicular to the vertical line C of the connection port body 8, so that the basket catheter 16 is Therefore, it is always located on the left side of the ultrasonic probe 15.

Furthermore, due to the above-mentioned deviation dimension d, the basket catheter 16 does not hit the ultrasound probe 15 and become unable to be inserted. Therefore, the ultrasonic probe 15 can be smoothly inserted into the treatment tool vibe 22.

In this embodiment, the same effect can of course be obtained even if the ultrasound probe 15 is inserted after the basket catheter 16 is inserted.

FIG. 4 shows another embodiment of the present invention, in which the treatment tool vibe 22 has a substantially heart-shaped cross section. In this way, the cross-sectional space inside the treatment tool vibe 22 can be used more effectively, 1, without increasing the diameter of the sheath 4 through which the treatment tool vibe 22 is inserted, compared to the above embodiment. A thick first treatment instrument 31 and a second treatment instrument 32 can be inserted.

FIG. 5 shows still another embodiment of the present invention, in which an eyepiece 6 is provided at the rear of the main body 1 in the axial direction, and the first tube 9 of the connection port 8 is connected to the main body 1. The second tubular body 11 is attached at a predetermined inclination angle to the axis, and the second tubular body 11 is connected to the first tubular body 9 at a predetermined inclination angle. The axis of the first tubular body 9 and the axis of the second tubular body 11 are shifted by a predetermined dimension in a lateral direction perpendicular to the vertical line with respect to a vertical line (not shown) of the connection port body 8.

Even in such a structure, it is possible to improve the insertability of the treatment instrument and to stabilize the positional relationship in the inserted state, as in the above embodiment. However, when the rigid endoscope is rotated and used in any narrow place, the eyepiece 6 does not get in the way unlike the conventional structure.

Although not shown, the present invention connects the connection port body 8 to the sheath 4.
Alternatively, a bridge may be provided between the sheath 4 and the eyepiece 6, and a connection mouth body 8 may be connected to this bridge.
may be connected.

Furthermore, the connection port body 8 may have not only two treatment instrument ports but also three or more.

[Effects of the Invention] As described above, in this invention, the center axis of at least one treatment tool port is shifted from the center axis of the other treatment tool ports, so that the treatment consisting of each treatment tool port can be performed. Not only will the tools not collide with each other and become impossible to insert, but the positional relationship of the inserted treatment tools will not be consistent and operability will not deteriorate.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a connection port connected to a main body showing an embodiment of the present invention, Fig. 2 is a sectional view taken along line A-A in Fig. 1, and Fig. 3 is a sectional view of the insertion portion. 4 is a side view of the distal end side of the insertion section showing another embodiment of the present invention; FIG. 5 is an overall schematic diagram showing still another embodiment of the present invention; FIG. 6 is a schematic diagram showing a general rigid endoscope,
FIG. 7 is a sectional view of a conventional connection port body, and FIG. 8 is a side view of the connection port body as seen from the rear side. 8... Connection port body, 9... First pipe body (first treatment tool port), 11... Second pipe body (second treatment tool port), 15
... Ultrasonic probe (both treatment), 16... Basket catheter (treatment tool). Applicant's representative Patent attorney Jun Tsuboi Figure 1 Figure 2 Figure 4 Figure 5 Figure 8

Claims (1)

[Claims] A rigid endoscope having at least two or more treatment instrument ports, characterized in that the central axis of at least one treatment instrument port is shifted from the central axis of the other treatment instrument ports. mirror.