JP2004298350A - Clamp plug for endoscope - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent filth, such as a highly pressurized humor injected from a throttling passage having a smaller pore size than a treatment tool inserting passage provided in an endoscope from flowing out from a clamp plug. <P>SOLUTION: Although the filth, such as the humor etc., flowing from the treatment tool inserting passage 11 to the throttling passage 24, is injected with high pressure from the throttling passage 24 when a suction valve is shut off, the entrance of a slit 33 provided in a treatment tool guiding section 32 on the treatment tool inserting passage 11 side is constituted by deviating the position of the entrance from a position on the extended surface of the throttling passage 24 so that the slit 33 may not receive directly the filth, such as the humor etc., injected from the throttling passage 24. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a forceps stopper that is provided in an endoscope used for medical use and the like and that is detachably attached to a mouthpiece of a treatment instrument introduction port in a treatment instrument insertion channel for inserting forceps and other treatment instruments.
[0002]
[Prior art]
An endoscope that is inserted into a body cavity and performs a medical examination or the like has an insertion section into the body cavity connected to a main body operation section that is operated by an operator or the like by hand and furthermore, a light source is connected to the main body operation section. It is generally configured by connecting and providing a universal cord that is detachably connected to a device or the like. The distal end of the insertion unit includes an illumination unit for illuminating the inside of the body cavity, and an observation unit for inspecting the inside of the body cavity under illumination emitted from the illumination unit.
[0003]
For example, when an affected part or the like is found as a result of an inspection using an endoscope, a necessary treatment can be performed, and there is also a configuration in which tissue cells can be sampled. For this purpose, the endoscope is provided with a treatment tool insertion channel for inserting forceps and other treatment tools. The distal end of the treatment instrument insertion channel is open at the distal end of the insertion section together with the illumination section and the observation section. On the other hand, the proximal end side of the treatment instrument insertion channel is branched into a treatment instrument insertion passage for inserting the treatment instrument and a suction passage for sucking dirt and the like in the body cavity. The treatment instrument is introduced into the treatment instrument insertion channel via a treatment instrument insertion passage provided on the main body operation unit side. For this purpose, a treatment instrument introduction port is formed in the main body operation unit or a connecting portion between the main body operation unit and the insertion unit.
[0004]
Since the pressure in the body cavity is higher than the atmospheric pressure, and the treatment tool insertion channel may also be used as a suction passage, the treatment tool introduction port cannot be always opened. For this purpose, it is common to provide a mouthpiece at the treatment instrument introduction port, attach a forceps plug, and seal the treatment instrument introduction port. When using a treatment instrument, it is common practice to provide an open / close valve on the forceps stopper instead of removing the forceps stopper from the base, and to open the valve when inserting the treatment instrument. is there. In addition, since the inside of the treatment instrument insertion channel must be cleaned each time it is used, the forceps stopper is detachably attached to the mouthpiece of the treatment instrument introduction port.
[0005]
Conventionally known forceps stoppers include a throttle passage having a smaller diameter than the diameter of the treatment instrument inlet, and a slit that is substantially the same as or longer than the diameter of the treatment instrument inlet. In the prior art, there has been known a configuration in which the treatment instrument introduction port is configured to be kept in a tightly closed state by making the treatment tool introduction port closed (for example, see Patent Document 1). When the treatment tool is inserted, the slit is pushed and widened. In the case of a thin treatment tool, the spread of the slit is small, so that a certain degree of hermeticity is ensured. Further, when a thick treatment tool is inserted, the slit is greatly widened, so that the slit cannot exhibit a sealing function. However, since the throttle passage is provided in addition to the slit, it is inserted so as to expand the throttle passage, so that even when using a thick treatment instrument, the treatment instrument introduction port is kept substantially sealed. Is done. As a result, while performing treatment or the like in the body cavity using the treatment tool, it is possible to prevent inconveniences such as backflow of dirt such as bodily fluids and adhesion to the operator's hands and the like.
[0006]
[Patent Document 1]
Japanese Utility Model Laid-Open No. 2-136603 (pages 8-10, FIG. 1)
[0007]
[Problems to be solved by the invention]
By the way, as described above, since the treatment tool insertion channel is also used as a suction passage, operating the suction valve provided in the main body operation unit to perform suction from the body, and then shutting off the suction valve, The inside of the treatment tool insertion channel is in a considerably high pressure state, and pressure acts on the inner surface of the forceps stopper. Since the slit of the forceps stopper is provided on an extension of the throttle passage, the suctioned substance that has taken the throttle passage directly acts on the slit. In this way, when pressure acts on the slit, the slit is opened, the suction substance flows out of the forceps plug, and inconvenience such as attachment of dirt such as body fluids to the operator's hand and the like are scattered around. Inconvenience may occur. In particular, when forceps, tubes, and the like are repeatedly inserted and removed through the slit, the adhesive force of the slit is weakened, and the slit is likely to be opened. When the above-described pressure acts on the slit having the weakened adhesion, the suction substance is more likely to flow out of the forceps stopper.
[0008]
SUMMARY OF THE INVENTION An object of the present invention is to provide a forceps for an endoscope that is configured so that a slit does not directly receive the pressure of an aspirated substance flowing out of a throttle passage, thereby preventing dirt such as bodily fluids from flowing out of a forceps plug to the outside. It is to provide a stopper.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides an endoscope forceps plug which is detachably attached to a treatment instrument insertion passage provided in an endoscope, and has a smaller hole diameter than the treatment instrument insertion passage. A stopper main body provided with a throttle passage, and an opening / closing valve portion provided with a slit through which a treatment tool can be inserted and withdrawn at all times, and at least the treatment tool insertion passage of the slit The side connecting portion is provided at a position shifted from a position on an extension of the throttle passage.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
A. First Embodiment of the Present Invention Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. First, FIG. 1 shows an overall configuration diagram of an endoscope. In the drawing, 1 is a main body operation unit, 2 is an insertion unit, and 3 is a universal cord. The insertion portion 2 is a flexible portion 2a that bends freely along the bending direction when the insertion path in the body cavity is bent for most of the length from the connection side to the main body operation portion 1. An angle part 2b and a hard tip part 2c are sequentially connected to the soft part 2a. The rigid distal end portion 2c is provided with an illuminating portion and an observing portion (both not shown) constituting an endoscope observation means, and the angle portion 2b guides the rigid distal end portion 2c along an insertion path, In addition, in order to change the field of view of the endoscope observation means provided on the distal end hard portion 2c, a bending operation can be performed in a desired direction. The bending operation of the angle section 2c is performed by remote control by an angle operation means 4 provided in the main body operation section 1.
[0011]
The endoscope is not only capable of observing the inside of a body cavity, but also capable of performing a treatment on an affected part found as a result of an endoscopic examination, sampling a tissue, and the like, by the endoscope observation means described above. For this purpose, a treatment instrument introduction section 5 is provided in the main body operation section 1, and a treatment instrument insertion channel 6 is provided in a region from the treatment instrument introduction section 5 to the distal end hard portion 2c. The distal end of the channel 6 is open to the distal end hard portion 2c together with the illuminating unit and the observation unit. Accordingly, a desired treatment can be performed by inserting forceps and other treatment tools from the treatment tool introduction section 5 into the treatment tool insertion channel 6 and leading them out of the predetermined length from the hard distal end portion 2c.
[0012]
The treatment instrument insertion channel 6 is also used as a suction passage. Therefore, as shown in FIG. 1, the treatment instrument insertion channel is connected to the treatment instrument insertion passage 11 that reaches the treatment instrument introduction section 5 in the main body operation section 1, and from the main body operation section 1 to the suction device via the universal cord 3. It branches into a suction passage 12 to be connected. Further, a suction valve 7 is provided in the main body operation unit 1, and by operating the suction valve 7, the suction passage 12 can be communicated / blocked.
[0013]
Therefore, if body fluids and dirt are present in the body cavity where the endoscopic examination is performed, the suction valve is operated to discharge them from the treatment instrument insertion channel 6 to the suction passage 12 to observe the body cavity. Make the conditions good. In this state, the inside of the body cavity is inspected, and as a result, if an affected part or the like is present, forceps or other treatment tools are inserted from the treatment tool introduction unit 5 into the treatment tool insertion channel 6 to perform appropriate treatment. become.
[0014]
From the above, it is necessary that the treatment instrument introduction unit 5 be kept in a sealed state at least during the suction operation, and the treatment instrument must be able to insert the treatment instrument as it is. Furthermore, since the treatment tool insertion channel 6 is contaminated with body fluids and the like, the interior of the treatment tool insertion channel 6 must be cleaned after use. Therefore, the forceps stopper 10 is detachably attached to the treatment instrument introduction part 5, and the forceps stopper 10 is always kept in a sealed state, and has a structure in which the treatment instrument can be inserted.
[0015]
Next, a specific configuration of the forceps plug 10 in the present embodiment will be described with reference to FIG. In FIG. 2, a mouthpiece 13 is provided at a distal end portion of the treatment instrument insertion passage 11, and the forceps plug 10 is detachably attached to the mouthpiece 13. The forceps stopper 10 is entirely formed of an elastic member such as rubber, and has a stopper main body 20 and an opening / closing valve part 21, and a flat band-shaped part is provided between the stopper main body 20 and the opening / closing valve part 21. And a connecting portion 22 for folding back.
[0016]
The stopper main body 20 has a first annular ridge 23 which is formed in a substantially cylindrical shape at an outer peripheral portion and which protrudes inward in an annular shape from one end side. A partition wall 25 having a passage 24 is provided, and a second annular ridge 26 serving as a locking portion is formed at the other end. A first annular recess 27 is provided between the first annular ridge 23 and the partition 25, and a second annular recess is provided between the partition 25 and the second annular ridge 26. 28 are formed. The opening / closing valve portion 21 is substantially continuous with a projecting portion 30 projecting from the end face of the main body plate 29. The projecting portion 30 has an annular groove 31 formed therein. A holding portion for holding the second annular ridge 26 serving as a locking portion of the plug main body portion 20 is constituted by both rising walls 31. A treatment tool guide portion 32 having a substantially concave hemispherical shape is formed on the surface of the main body plate 29 of the opening / closing valve portion 21 opposite to the projecting direction of the projecting portion 30, and a bottom portion of the treatment tool guide portion 32 is formed. Is formed with a slit 33. Further, a depression 34 is formed in a portion of the slit 33 where the treatment instrument guide 32 is located. The depression 34 is for allowing the slit 33 to be easily deformed inward when the treatment instrument is inserted. The depression 34 is also used for adjusting the thickness of the formation portion of the slit 33. Used. Further, the recess 34 flows backward from the treatment instrument insertion channel 6 and functions as a reservoir for bodily fluids and dirt.
[0017]
In the forceps plug 10 configured as described above, as shown in FIG. 2, the position of the slit 33 is formed at a position displaced from the extension of the throttle passage 24. That is, FIG. 3 is a plan view of the forceps plug 10, and as shown in FIG. 3, the slit 33 for inserting and removing the treatment tool is located at the center of the restriction passage 24 of the treatment tool guide 32. Are formed at positions deviated by an interval d from. At this time, d is preferably larger than the radius of the throttle passage 24. As described above, the slit 33 is provided at a position shifted from the center position of the throttle passage 24 by the interval d. However, in order to guide the treatment tool into the throttle passage 24, a tapered inlet 25a is formed at the upper end of the partition wall 25. Is formed.
[0018]
The operation when the suction by the suction valve is performed and then shut off when the entrance of the slit 33 on the treatment tool insertion passage 11 side is shifted from the extension surface of the throttle passage 24 as described above will be described.
[0019]
First, when the suction valve 7 is shut off after suction of a suction substance such as dirt in the body cavity, the inside of the treatment instrument insertion channel 6 is in a considerably high pressure state, and pressure is applied to the forceps plug 10. Therefore, the suction substance remaining in the treatment tool insertion channel 6 exerts a force flowing toward the distal end of the treatment tool insertion passage 11, but the suction substance passage has a smaller aperture than the treatment tool insertion passage 11. It gushes from the passage 24. At this time, the direction of the flow of the suction substance ejected from the throttle passage 24 is directed to the lowermost position on the lower surface of the on-off valve 21. However, since the slit 33 is not formed in this position, the pressure is not directly received by the suction substance ejected from the throttle passage 24, and the pressure is dispersed. Therefore, since a strong pressure does not act on the slit 33, the slit does not open, and a large amount of aspirated substance flows out of the forceps plug, and contaminants such as body fluids adhere to the operator's hand and the like. It is possible to prevent the inconvenience of doing so and the inconvenience of being scattered around.
[0020]
B. Second Embodiment of the Present Invention Next, a second embodiment of the present invention will be described. In the present embodiment, as shown in FIG. 4, the slit 33 is provided obliquely with respect to the extension of the treatment instrument insertion passage 11. That is, the communicating portion of the slit 33 to the treatment instrument insertion passage 11 side is formed at a position shifted from the extension of the throttle passage 24, but the exit of the slit 33 on the opposite side to the treatment instrument insertion passage 11 is connected to the treatment instrument. It is provided so as to be located at the center of the guide portion 32. Even in such a case, since the slit 33 does not directly receive the strong pressure of the suction substance ejected from the throttle passage 24, the slit does not enter an open state, and a large amount of suction substance flows from the forceps stopper. It is possible to prevent inconveniences such as outflow and attachment of dirt such as bodily fluids to the operator's hand and inconvenience such as being scattered around.
[0021]
【The invention's effect】
As described above, according to the present invention, since the communicating portion of the slit to the treatment instrument insertion passage is formed at a position shifted from the position on the extended surface of the throttle passage, the suction substance squeezed and ejected by the throttle passage is formed. To prevent inconveniences such as suction substances flowing out of the forceps plug and sticking of dirt such as bodily fluids to the surgeon's hands, and being scattered around. Can be.
[Brief description of the drawings]
FIG. 1 is an overall configuration diagram showing an example of an endoscope to which a forceps stopper of the present invention is attached.
FIG. 2 is a sectional view of a forceps stopper according to the first embodiment of the present invention.
FIG. 3 is a plan view of the forceps stopper according to the first embodiment of the present invention.
FIG. 4 is a sectional view of a forceps stopper according to a second embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Main body operation part 2 Insertion part 5 Treatment tool introduction part 6 Treatment tool insertion channel 10 Forceps plug 13 Cap 20 Plug body part 21 Opening / closing valve part 24 Restriction passage 32 Treatment tool guide part 33 Slit

Claims (2)

A plug body portion detachably attached to a treatment instrument insertion passage provided in the endoscope, and provided with a throttle passage having a hole diameter smaller than the hole diameter of the treatment instrument insertion passage,
A treatment tool is insertable and removable, and has an on-off valve portion provided with a slit that is always in a close contact state,
An endoscope forceps stopper, wherein a communicating portion of the slit at least to the treatment instrument insertion passage side is provided at a position shifted from a position on an extension of the throttle passage. 2. The endoscope forceps stopper according to claim 1, wherein the slit is provided obliquely with respect to a direction of an extension of the throttle passage. 3.

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