JPS62275447A - Forcept cock for endoscope - 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 3. Detailed Description of the Invention [Field of Industrial Application] This invention relates to an improvement in a forceps plug for an endoscope that is attached to a treatment instrument insertion port body of an endoscope.

C. Prior Art] In general, as shown in FIG.
A treatment instrument insertion channel connected to the insertion port of the treatment instrument insertion port body 3 is disposed inside the body, and when the insertion portion 4 of the endoscope 1 is inserted into the patient's body, the treatment instrument insertion channel is inserted into the patient's body. There are known devices configured to perform various treatments such as injecting a medicinal solution into the body, or performing various treatments such as excision and sampling of a lesion inside the body using a treatment instrument 5 inserted into the treatment instrument insertion channel. In this case, the treatment instrument insertion channel of the endoscope 1 is connected to the insertion port of the treatment instrument insertion port body 3 on the proximal side, and the distal side is connected to the suction of the distal end component 6 of the endoscope VT1, the treatment instrument lower side. When the insertion section 4 of the endoscope 1 is inserted into the patient's body, the inside of the patient's body cavity and the outside are communicated via the treatment instrument insertion channel.

Therefore, there is a problem that air and dirt in the body cavity leak to the outside through the treatment instrument insertion channel due to changes in the body cavity pressure. A forceps plug 8 is installed 6 to prevent leakage of air and tq substances in the body cavity. In this case, the forceps plug body of the forceps plug 8 is formed of an elastic material, and an insertion hole through which the endoscopic treatment tool 5 is inserted is formed in the forceps plug body. Furthermore, a fitting part that fits into the treatment instrument insertion port body 3 of the endoscope 1 is formed at the lower part of this insertion hole, and an occluding membrane that airtightly closes this insertion hole is arranged at the upper part of the insertion hole. A slit into which the treatment instrument 5 is inserted is formed in this occlusion membrane. In this case, the slit of the occlusion membrane is airtightly closed in the normal state (the state in which no treatment instrument 5 is inserted into the occlusion membrane), and in this state, the IF prevents leakage of air and dirt in the body cavity. In addition, by pressing the treatment instrument 5 against the slit portion of the occlusion membrane, the slit portion 6 of the occlusion membrane opens, and the treatment instrument 5 is inserted from the insertion hole of the forceps plug body through the insertion opening of the treatment instrument insertion port body 3. It is designed to be inserted into the treatment instrument insertion channel. In FIG. 4, 9 is a universal cord connected to the operating section 2 of the endoscope 1, and 10 is a curved portion of the endoscope 1.

[Problems to be Solved by the Invention] In the case of the conventional structure, when the treatment instrument 5 is inserted into the treatment instrument insertion channel, the slit portion of the occluding membrane of the forceps plug body opens, so that the forceps can be inserted into the body cavity from this portion. There was a risk that air and filth could leak to the outside. For example, when a suction device is connected to the endoscope 1 and a suction operation is performed through the treatment instrument insertion channel with this suction device, water hammer of the fluid to be aspirated immediately after the suction operation is stopped or when the suction operation is repeated. As a result of this action, a large impact force is applied to the forceps plug body, and this impact force may cause the slit portion of the occlusion membrane to open, causing air and dirt in the body cavity to blow out to the outside.

As shown in Japanese Utility Model Application No. 60-177801, a narrow diameter portion smaller than the outer diameter of the treatment instrument 5 is formed in the insertion hole of the forceps plug body, and a narrow diameter portion is formed in the insertion hole of the forceps plug body, and the diameter portion is smaller than the outer diameter of the treatment instrument 5. A structure has been proposed in which when the treatment instrument 5 is inserted, the peripheral wall portion of the narrow diameter portion is brought into pressure contact with the treatment instrument 5 to maintain airtightness.

However, in this case, when the forceps plug body deteriorates, there is a risk that the inner diameter of the narrow diameter portion will expand to a state larger than the outer diameter of the treatment instrument 5. There was also the problem that it was not possible to prevent leakage of iTj materials to the outside.

Furthermore, a large diameter space is formed in the insertion hole of the forceps plug body, and t9 flows out to the outside through the treatment instrument insertion channel.
It is also conceivable to have a structure in which things are stored in this space and prevented from leaking to the outside. However, in this case, when injecting a medical solution into the patient's body through the treatment instrument insertion channel, the support of the syringe inserted into the insertion hole of the forceps plug body becomes unstable, making it difficult to inject the medical solution. There was a problem that made it troublesome.

This invention can effectively prevent air and dirt in the body cavity from leaking to the outside while using an endoscope, and also prevents the syringe from leaking when the syringe is inserted into the insertion hole of the forceps plug body. It is an object of the present invention to provide a forceps plug for an endoscope that can stably support a medical fluid and facilitate operations such as injection of a medical solution.

[Means for Solving the Problems] The present invention provides a narrow diameter portion 16 having a smaller diameter than the outer diameter of the treatment instrument 5 in the insertion hole 12 of the endoscopic treatment instrument 5 formed in the forceps plug body 11. At the same time, this narrow diameter portion 16 and the insertion hole 1
A syringe holding part 17 that holds the syringe between the syringe holding part 17 and the occluding membrane 14 formed on the upper part of the syringe holding part 1
A waste storage chamber 18 which is wider than 7 is provided respectively.

[Operation] When the treatment instrument 5 is inserted into the treatment instrument insertion channel of the endoscope 1 through the narrow diameter portion 16 formed in the insertion hole 12 of the forceps plug body 11, the peripheral wall portion of this narrow diameter portion 16 is inserted into the treatment instrument. 5 to maintain airtightness, and the wide dirt storage chamber 18 formed between the narrow diameter part 16 and the occlusion membrane 14 prevents air and dirt in the body cavity from being removed from the outside when the forceps plug body 11 deteriorates. By reducing the flow rate of the fluid to be sucked flowing toward the outside inside the insertion hole 12 by using the waste storage chamber 18, when a suction operation is performed through the electric channel of the tool J. The syringe holding part 17 is formed between the narrow diameter part 16 and the occlusion membrane 14 when the syringe is used. This allows the syringe to be held stably.

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

FIG. 1 shows a first embodiment of the invention. FIG. 1 shows a schematic configuration of the main parts of a forceps plug 8 inserted into the treatment instrument insertion port body 3 of the operating section 2 of the endoscope 1 as shown in FIG. 4, and 11 is an example.

For example, the forceps plug body is made of an elastic material such as silicone rubber, fluorine rubber, or nitrile butyl rubber. In this case, the forceps plug main body 11 is formed with an insertion hole 12 through which the endoscopic treatment tool 5 is inserted. Further, the forceps plug main body 11 has a fitting portion 13 formed below the insertion hole 12 to be detachably fitted to the treatment instrument insertion port body 3 of the endoscope 1. In this case, a pair of upper and lower flanges 3a and 3b are formed on the treatment instrument insertion port body 3 of the endoscope 1, and a flange portion of the treatment instrument insertion port body 3 is formed on the fitting portion 13 of the forceps plug body 11. These flange portions 3a, 3a and 3b are located at corresponding positions.
3b are formed respectively. In addition, the forceps plug body 11 has an insertion hole 1.
A closing membrane 14 that airtightly closes the insertion hole 12 is provided on the upper part of the insertion hole 12.
is installed. In this case, the occlusion membrane 14 is formed so that the thickness on the center side is thinner than on the outer peripheral side. A slit 15 into which the treatment instrument 5 is inserted is formed in the center of the occlusion membrane 14.

The slit 15 of this occlusion membrane 14 has a negative shape, for example.

It is formed in a shape such as a + shape or a Y shape, and is formed to be longer than the outer diameter of the treatment instrument 5.

Further, the insertion hole 12 of the forceps plug body 11 is formed with a narrow diameter portion 16 that is smaller in diameter than the outer diameter of the treatment instrument 5, and there is a space between the narrow diameter portion 16 and the occlusion membrane 14, as shown in the figure. A syringe holding part 17 that holds a syringe (injector) that does not have a syringe, and a lq object storage chamber 18 that is wider than this syringe holding part 17.
are formed respectively. In this case, the syringe holding part 17 is arranged above the narrow diameter part 16, and the waste storage chamber 18 is further arranged above this syringe holding part 17. In addition, the inner peripheral surface of the syringe holding part 17 has a lower side (
A tapered portion 19 is formed in which the inner diameter gradually decreases toward the bottom portion 1.7a side). Furthermore, a convex portion 20 into which the tip of a syringe (not shown) is fitted is formed at the upper end of the syringe holding portion 17 (the connection portion with the waste storage chamber 18).

Therefore, in the case of the above-mentioned +13 configuration, the fitting part 13 of the forceps plug body 11 is connected to the treatment instrument insertion port body 3 of the operating part 2 of the endoscope 1.
When inserting the treatment instrument 5 into the treatment instrument insertion channel of the endoscope 1 with the forceps plug body 1 fitted with the
The slits 15 to 19 of the occluding membrane 14 of 19 contain the objects 18.
The syringe holding portion 17 is introduced into the insertion port of the treatment instrument insertion port body 3 of the endoscope 1 through the inside of the narrow diameter portion 16 in order, and is further introduced into the treatment instrument insertion channel from the insertion port of the treatment instrument insertion port body 3. inserted. In this case, the narrow diameter portion 1 of the forceps plug body 11
6 is thinner than the outer diameter of the treatment instrument 5, so when the treatment instrument 5 is inserted, the peripheral wall portion of the narrow diameter portion 16 can be elastically deformed and brought into pressure contact with the treatment instrument 5, and airtightness can be maintained. . Therefore, the treatment instrument 5 is inserted into the treatment instrument insertion channel.
Even if the slit 15 of the occlusion membrane 14 of the forceps plug body 11 opens when the forceps plug body 11 is inserted, the narrow diameter portion 16 of the forceps plug main body 11 can prevent air and dirt in the body cavity from leaking to the outside. can. Furthermore, since a wide dirt storage chamber 18 is formed between the narrow diameter portion 16 and the obstruction membrane 14, the air and dirt in the body cavity that flowed out through the treatment instrument insertion channel are transferred into the waste storage chamber 18. It can be accumulated. Therefore, when the forceps plug main body 11 deteriorates, air and dirt in the body cavity can be prevented from leaking to the outside.

Furthermore, when the syringe is used, such as when injecting a medical solution into a body cavity, the syringe can be stably held by the syringe holding part 17 formed between the narrow diameter part 16 and the occlusion membrane 14. In this case, the syringe is the forceps plug body 11
The slit 15 of the closing membrane 14 is elastically deformed and expanded and inserted into the dirt storage chamber 18, and further fitted into the syringe holding part 17 from this dirt storage chamber 18. Therefore, when the tip of the syringe is properly fitted into the syringe holding part 17, the peripheral part of the slit 15 of the occlusive membrane 14 is held in strong pressure contact with the syringe, thereby maintaining airtightness between the inside of the body cavity and the outside. Since it can be held, when the piston of the syringe is pushed to inject a medical solution, the liquid is pumped into the body cavity from the insertion port of the treatment instrument insertion port body 3 of the endoscope 1 through the treatment instrument insertion channel. The liquid can be delivered reliably, and the injection operation of the medicinal liquid can be made easier than in the past.

In addition, the narrowest diameter portion 16 is the smallest in the insertion hole 12 of the forceps plug body 11. The syringe holding part 17 is arranged above the narrow diameter part 16, and the waste storage chamber 18, which is wider than the syringe holding part 17, is arranged above the syringe holding part 17. The opening area of the insertion hole 12 of the forceps plug main body 11 becomes gradually larger toward the second side. Therefore, a suction device is connected to the endoscope 1, and the suction device is used to pass the treatment instrument insertion channel through the endoscope 1. When a suction operation is performed, the fluid to be aspirated from the insertion port side of the treatment instrument insertion port body 3 to the inside of the insertion hole 12 of the forceps plug body 11 is expressed by the fluid dynamics continuity equation (AV-
(A: area, ■: flow velocity), the flow velocity V can be sequentially decreased toward the upper side, so it is possible to stop the suction operation when the suction device performs suction operation through the treatment instrument insertion channel. Immediately after or during repeated suction operations, the water hammer pressure of the fluid to be aspirated acting on the forceps plug body 11 can be reduced compared to the conventional method, and the slit 15 portion of the occlusion membrane 14 opens due to the water hammer pressure of the fluid to be aspirated. , it is possible to prevent air and dirt in the body cavity from blowing out to the outside. In this case, the syringe holding part 17
A tapered portion 19 is formed on the inner circumferential surface of the syringe holding portion 17, so that the flow velocity V of the aspirated fluid rising inside the syringe holding portion 17 is reduced. Tapered portion 1 of this syringe holding portion 17
9 can be sequentially decelerated, and the effect of reducing the water hammer pressure of the suction-suction fluid acting on the forceps plug body 11 can be further enhanced. Furthermore, since the limb suction fluid is stored in the large dirt storage chamber 18 of the forceps plug body 11, the fluid to be aspirated that accumulates in the dirt storage chamber 18 has a buffering effect on the flow of the fluid to be sucked next. The effect of reducing the water hammer pressure of the suctioned fluid can also be enhanced by the buffering effect of the suctioned fluid accumulated in the dirt storage chamber 18.

Furthermore, FIG. 2 shows a second embodiment of the invention. This has a wide T9 object storage chamber 18 arranged above the narrow diameter part 16 formed in the insertion hole 12 of the forceps plug body 11,
Furthermore, a syringe holding section 17 is provided above this waste storage chamber 18.
is arranged.

In this case, a suction device is connected to the endoscope 1, and when the suction device performs a suction operation through the treatment instrument insertion channel, the insertion hole of the forceps plug body 11 is inserted from the insertion port side of the instrument insertion port body 3. After the suction fluid sucked into the inside of the suction chamber 12 is throttled and depressurized by the narrow diameter portion 16, it is allowed to flow into the waste storage chamber 18, which has a large opening area, so that the flow velocity V of the suction fluid can be reduced. In the same case as in the first embodiment, when a suction operation is performed through the treatment instrument insertion channel using the suction device, immediately after 11: during the suction operation,
Alternatively, the water hammer pressure of the limb suction fluid acting on the forceps plug main body 11 during repeated suction operations can be reduced compared to the conventional method, and the water hammer pressure of the fluid to be aspirated opens the slit 15 portion of the occlusion membrane 14, thereby opening the body cavity. Air and dirt inside can be prevented from blowing out to the outside.

Further, FIG. 3 shows a third embodiment of the present invention. This is done by dividing the forceps plug main body 11 of the first embodiment into two parts including the part of the dirt storage chamber 18, and forming the forceps plug t on the lower side of the dirt storage chamber 18 and the -L side of the dirt storage chamber 18. lid body 2
2, and attach this lid body 22 to the forceps plug component 21 at 6
It is configured to be removably connected. In this case, the interior of the dirt 1 to 4 storage chamber 18 can be cleaned with the lid body 22 removed from the forceps plug component 21, so cleaning the inside of the dirt storage chamber 18 can be facilitated. can.

Note that the present invention is not limited to the above embodiments. For example, like the inner circumferential surface of the syringe holding portion 17, the inner circumferential surface of the waste storage chamber 18 may also have a tapered portion whose inner diameter gradually decreases toward the bottom. Furthermore, it goes without saying that various other modifications can be made without departing from the gist of the invention.

[Effects of the Invention] According to the present invention, a narrow diameter portion smaller than the outer diameter of the treatment instrument is formed in the insertion hole of the endoscopic treatment instrument formed in the forceps plug body, and the narrow diameter portion is A syringe holder that holds the syringe and a dirt storage chamber that is wider than the syringe holder are provided between the syringe and the occluding membrane formed at the top of the insertion hole, so air in the body cavity is kept away during use of the endoscope. In addition to effectively preventing substances from leaking to the outside, when the syringe is inserted into the insertion hole of the forceps plug body, the syringe can be stably supported, making it easier to inject the drug solution. etc. can be facilitated.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of the main part showing a first embodiment of the invention, FIG. 2 is a longitudinal sectional view of the main part showing a second embodiment of the invention, and FIG. Embodiment 3 is a vertical cross-sectional view of a main part of the embodiment, and FIG. 4 is a side view showing a state in which a forceps plug is attached to an endoscope. DESCRIPTION OF SYMBOLS 1... Endoscope, 3... Treatment instrument insertion port body, 5-... Treatment instrument, 11... Forceps plug body, 12... Insertion hole, 13
... Fitting part, 14... Occlusion membrane, 15... Slit, 16... Small diameter part, 17... Syringe holding part, 18
・・・rq Physical Real Estate Office Applicant's Agent Patent Attorney Review Notes Jun Figure 1 Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] An insertion hole through which a treatment tool for an endoscope is inserted is formed in the forceps plug body formed of an elastic material, and a fitting part that fits into the treatment tool insertion port body of the endoscope is formed at the lower part of this insertion hole. In the endoscope forceps plug, an occlusion membrane is disposed above the insertion hole to airtightly close the insertion hole, and a slit for inserting the treatment instrument is formed in the occlusion membrane. A syringe holding part that forms a narrow diameter part smaller in diameter than the outer diameter of the treatment instrument in the hole, and holds a syringe between the narrow diameter part and the occluding membrane, and a filth that is wider than the syringe holding part. A forceps plug for an endoscope, characterized in that each chamber is provided with a storage chamber.