JP2756130B2 - Contrast injection container - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a contrast medium injection container used for diagnosing the lower digestive tract such as the rectum and the sigmoid colon with an X-ray.

(Conventional technology) As a contrast medium injection container of this type, for example,
As disclosed in Japanese Patent No. 132739, a flexible tube is provided through a front cock provided with a check valve at a front opening of a container body, and an air supply means is provided at a rear opening of the container body. One with a cock has been proposed.

Since the contrast agent injection container having the above configuration is provided with a check valve at the front of the container body, the contrast agent can be prevented from flowing back into the container body due to intestinal pressure, and the front part of the container body and Openable and closable cocks are provided at the rear, so by opening and closing each cock with your fingers, you can adjust the injection amount of contrast agent sent from the container body into the intestine and the air injection amount, and handling is easy. It has the feature of being extremely simple.

(Problems to be Solved by the Invention) However, the check valve mounted on the front part of the container body is formed by providing a cut in the center of a circular plate-shaped valve plate, and the contrast agent is provided from the container body side. When the valve is pushed out, the cut edge of the valve plate is opened by deforming outward, and when the intestinal pressure becomes higher than in the container body, the valve plate closes the cut strongly. However, if a check valve is formed to prevent the contrast agent from flowing back due to intestinal pressure as described above, the contrast agent in the container body passes through the check valve. When the elasticity of the non-return valve is reduced, the injection pressure when sending it to the tube side is increased, so that the contrast agent can be easily pushed out of the container body. Abnormal intestinal pressure Backflow may occur at high temperatures.

The present invention solves the above-mentioned drawbacks, and an object of the present invention is to reliably prevent the backflow of the contrast agent and to inject the contrast agent into the intestine at a relatively low pressure. It is to provide a container.

(Means for Solving the Problems) A contrast agent injection container according to the present invention includes a container main body in which a contrast agent is put, a cylinder provided at a distal end portion of the container main body, and an elastic body mounted in the cylinder. A duck beak-type check valve made of a material; a slide tool movably mounted in the axial direction on a cylindrical body at a distal end side of the check valve; and a slide tool provided on the slide tool. When it is moved to the container body, it is located outside the tip of the check valve to prevent the opening of the check valve, and when the slide is moved to the tip of the cylinder, the tip of the check valve is moved. A pressing portion that is retracted from the outside of the device and allows the opening of the check valve, and an operating portion provided on the sliding device and capable of operating the sliding device with a finger. Is achieved.

(Operation) In the case where the operation unit is operated with a finger to position the slide tool at the distal end side of the cylindrical body so as to allow the opening of the check valve, the contrast agent is removed from the container body through the check valve opening. Can be extruded. Here, since the check valve is formed in the shape of a duck beak made of an elastic material, the contrast agent can be pushed out of the container body at a relatively low pressure.
Further, in this state, it is possible to prevent the contrast agent from flowing back to the container body due to the intestinal pressure.

Next, if the operation unit is operated with a finger to position the slide device on the container body side and the pressing portion of the slide device prevents the opening of the check valve, it is ensured that the contrast agent flows back. Can be prevented.

(Examples) Hereinafter, the present invention will be described in detail based on examples.

As shown in FIG. 1, the contrast agent injection container is provided with a container body 1 in which a contrast agent is put, a cylindrical body 10 provided integrally with a tip portion of the container main body 1, and mounted in the cylindrical body 10. The backflow prevention valve 2 is a duck beak type backflow prevention valve made of an elastic material, and a slide member 3 is mounted on the cylindrical body 10 at the distal end of the backflow prevention valve 2 so as to be movable in the axial direction.

The container body 1 is formed in a hollow body with a synthetic resin material such as a soft vinyl chloride resin or polyethylene, and both ends in the longitudinal direction are reduced in diameter, and a small-diameter cylindrical portion 13 is integrally formed at the tip of the container body 1. It has been extended. A connecting tube portion is provided at the tip of the tube portion 13.
14 is provided, and a rear end portion of the tubular body 10 is connected to the connecting tubular portion 14.

The cylindrical body 10 is composed of a first cylindrical body 11 and a second cylindrical body 12, and a connecting cylindrical portion 15 provided at a rear end of the first cylindrical body 11 is fitted inside the connecting cylindrical portion 14 of the container body 1. At the same time, the connection cylinder 15 and the connection cylinder 14 are adhered to each other by an adhesion means such as high-frequency adhesion, so that the container main body 1 and the first cylinder 11 are hermetically sealed with good sealing properties. Further, an insertion cylinder 18 having a slightly smaller diameter is provided at the distal end of the first cylinder 11, and the insertion cylinder 18 is inserted into and fixed to the end of the second cylinder 12 so that the first cylinder 11 and the first cylinder 11 are connected to each other. The second cylindrical body 12 is hermetically sealed with good sealing properties.
An elongated hole 16 notched from the edge is formed at the tip of the first cylindrical body 11.

As shown in FIG. 2, the check valve 2 mounted in the cylindrical body 10 has a valve section 21 having a sharpened distal end at the distal end of the cylindrical section 20 and a proximal end of the cylindrical section 20. It is provided with a flange 24. The valve portion 21 has a pair of inclined pieces 22, 22 facing each other, and a cut end 23 capable of separating the two inclined pieces 22, 22 is provided at the tip of both inclined pieces 22, 22. As described above, the check valve 2 is formed of an elastic material such as rubber or flexible plastic. When a contrast agent having a predetermined pressure or more acts on the inner surfaces of the pair of inclined pieces 22, 22, both check valves are used. The tip of the inclined pieces 22, 22 is pressed by the pressure of the contrast agent and deforms outward, thereby opening the cut 23, and the contrast agent can pass through the cut 23. Further, when the pressure of the contrast agent acting on the inner surface side of the pair of inclined pieces 22, 22 is less than a predetermined pressure,
The cut end 23 is closed without deforming the tip portions of the two inclined pieces 22, 22, and the contrast agent cannot pass through the check valve 2. The check ring 2 is concentrically formed in the first cylinder 11 with its flange 24 sandwiched between the connection cylinder 14 of the container body 1 and the connection cylinder 15 of the first cylinder 11. The distal end of the valve portion 21 is directed toward the distal end of the cylindrical body 1.

As shown in FIGS. 1 and 4, the slide member 3 includes a slide cylinder 30 slidably housed in the first cylinder 11 and a pair of projections protruding from opposing positions on the inner surface of the slide cylinder 30. It has pressing portions 31, 31 and an operating portion 32 projecting from a part of the outer peripheral surface of the slide cylinder 30. A circulation port is provided between the two pressing portions 31, 31.
35 is formed, and the width of the distribution port 35 is the valve portion of the check valve 2
22 It is set slightly larger than the width of the tip. The operating portion 32 is engaged in the elongated hole 16 formed in the first cylindrical body 11, and by moving the operating portion 32 in the axial direction of the first cylindrical body 11 within the range of the elongated hole 16, The slide cylinder 20 can be slid along the inner surface of the first cylinder 11. As shown in FIG. 5, engaging projections 34, 34 are provided on both side end surfaces of the operation portion 32, and as shown in FIG. When the engagement groove 17 engageable with the engagement protrusion 34 is provided in a concave shape, and the slide tool 3 is moved toward the container body 1 to engage the engagement protrusion 34 with the first engagement groove 17a. In the state, the pressing portion 31 of the slide 3 presses the outer surfaces of the two inclined pieces 22 and 22 of the check valve 2, and the slide 3 is moved to the opposite side so that the engagement protrusion 34 is moved to the second engagement position. When engaged with the mating groove 17b, the pressing portion 31
Are retracted from the outer surfaces of the two inclined pieces 22 of the check ring 2.

As shown in FIGS. 4 and 6, ridges 33 having a semicircular cross section are provided on the outer peripheral surfaces of both ends of the slide cylinder 30 over the entire circumference, and each ridge 33 is provided on the first cylindrical body 11. And, by being in sliding contact with the inner peripheral surface of the second cylindrical body 12, the sealing property between the slide cylinder 30 and the first cylindrical body 11 and the second cylindrical body 12 is maintained. A flexible tube 4 provided with a glans-shaped insertion portion 5 at the tip is connected to the tip of the second cylindrical body 12.

At the rear end of the container body 1, a small-diameter rear tubular portion 6 is integrally extended, and the rear tubular portion 6 is connected to an adapter 7 to which an air supply means such as an air supply balloon is connected. A tubular member 8 having a closed distal end is fixed to the inner surface of the adapter 7, and the distal end tip 8a is folded at the folded groove 9 so that the inside of the adapter 7 and the interior of the container body 1 can communicate with each other. I have.

Next, a method of using the thus configured contrast medium injection container will be described.

As shown in FIG. 1, when the operating portion 32 of the slide 3 is moved in the distal direction with a finger to engage the engagement protrusion 34 with the second engagement groove 17b, the pressing portion 31 of the slide 3 is moved. Is a check valve 2
Of the check valve 2 in a state away from the valve portion 21 of FIG.
23 can be opened. In this state, when the container main body 1 is grasped, the contrast agent filled in the container main body 1 is pushed out toward the cylinder 10 through the cutout 23 of the check ring 2. Therefore, if the above operation is performed in a state where the insertion portion 5 at the distal end of the tube 4 is inserted into the anus, the contrast agent in the container body 1 can be gradually infused manually. Further, when the gripping force of the container body 1 is relaxed due to abdominal pain or the like, the pressure in the tube 4 may be higher than the pressure in the container body 1. As a result of the pair of inclined pieces 22, 22 being pressed by the contrast agent to make the cut 23 firm, the contrast agent does not flow into the container body 1 from the cylinder 10 side.

After enema, slide the operating part 32 with a finger to
Is engaged with the first engagement groove 17a, the pressing portion 31 of the slide tool 3 presses the outer surfaces of the two inclined pieces 22, 22, resulting in the cutout 23.
Is completely closed, and the tip portions of both inclined pieces 22, 22 are restricted from being deformed outward, so that the flow of the contrast agent is completely prevented.

Next, the distal end tip 8a provided at the distal end of the cylindrical member 8 is bent with a finger to connect the inside of the container main body 1 and the inside of the adapter 7, and an air supply means is connected to the adapter 7, and the air supply means is appropriately connected to the adapter 7. By sending air into the container body 1 and slidably moving the slide 3 forward as appropriate,
The air in the container body 1 can be sent into the intestine through the check valve 2. After sending a predetermined amount of air into the intestine in this way, the tube 4 is removed from the anus, and then a predetermined postural change is performed to attach a contrast agent to various parts of the colon, and radiography is performed.

As described above, according to the backflow prevention device of the present embodiment, the slide member 3 is moved to the container body 1 side, and the pressing portion 31 presses the tip of the valve portion 21 of the backflow prevention valve 2, whereby the backflow prevention valve is provided. 2, the contrast agent can be reliably prevented from passing through the check valve 2. Also, as in the above configuration, only the slide member 3 is slidable in the axial direction of the cylindrical body 10 and the tube 4 is fixed to the container main body 1, so that the contrast agent is transferred from the container main body 1 through the tube 4. When performing an enema, the tube 4 can be placed in a predetermined position in the anus, and the operation of moving the slide 3 is easy. Further, when the slide device 3 is switched,
Since the engagement protrusion 34 is engaged with the first engagement groove 17a or the second engagement groove 17b, the slide member 3 does not unexpectedly move due to the pressure of the contrast agent or the like.

In addition, a tapered surface having a reduced width on the check valve side is provided at a position facing the inclined piece on the inner surface of the second cylindrical body, and a pair of bent pieces that can be deformed inward and outward are provided at the tip of the check valve on the slide valve side. In addition to the above, when a pressing portion is provided on the inner surface of each bent piece, and the sliding tool is slid to the check valve side, each bending piece is deformed inward along the inner surface of the tapered surface, so that the pressing portion is formed. In this case, the tip of the inclined piece of the check valve may be pressed. In this case, there is an advantage that the tip of the check valve can be more reliably closed and the moving dimension of the slide device can be shortened.

(Effect of the Invention) As described above, according to the present invention, since the check valve is formed of a duck beak made of an elastic material, it is possible to inject the contrast agent from the container body at a relatively low pressure. Can be. Further, even if the intestinal pressure is higher than the pressure in the container body, the contrast agent is unlikely to flow backward in the above-described check valve, and the opening of the check valve is blocked by the slide device, thereby enhancing the contrast. The distribution of the agent can be reliably prevented. In addition, by using the check ring as a member for stopping the flow of the contrast agent, the state in which the check ring is prevented by the check valve and the state in which the flow of the contrast agent is stopped can be performed with a relatively simple structure. .

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view of a contrast medium injection container according to one embodiment of the present invention, and FIGS. 2 (a), 2 (b) and 2 (c) are partially cutaway front, bottom, and side views of a check valve. Fig. 3 (a) (b) (c)
Fig. 4 is a partially broken front view, a bottom view, and a side view of the first tubular body, Figs. 4 (a), (b), and (c) are partially broken front views, a bottom view, a side view, and Figs. FIG. 4 (b) is an enlarged view of a portion B, and FIG. 6 is an enlarged view of a portion A of FIG. 4 (a). DESCRIPTION OF SYMBOLS 1 ... Container main body, 2 ... Check valve, 3 ... Slide tool, 10 ... Cylindrical body, 31 ... Press part, 32 ... Operation part.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A 60-1332739 (JP, U) JP-A 62-24835 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) A61M 3/00

Claims (1)

(57) [Claims] 1. A container body in which a contrast agent is placed, a cylinder provided at a tip portion of the container body, a duck beak-type check valve mounted on the cylinder body and made of an elastic material,
A slide tool movably mounted in the axial direction on the cylindrical body at the distal end side of the check valve, and a slide tool provided on the slide tool. It is located outside the tip to prevent the opening of the check ring, and when the slide is moved to the tip of the cylinder, it retracts from the tip of the check ring to allow the check ring to open. A contrast agent injection container, comprising: a pressing portion that can be operated; and an operation portion provided on the slide device and capable of operating the slide device with a finger.