JP3185453U - Chemical injection device - Google Patents

Abstract

Disclosed is a chemical liquid injection device capable of selectively and easily injecting different amounts of chemical liquids with a single injector and capable of reliably purging air in a path for injection in a short time. .
A plurality of pipes having different flow rates are incorporated therein, and a main body of the apparatus 1 is constituted by a case main body, a lid body that closes the opening thereof, and a slider that slides on the lid body. A pressing body that presses the pipe is disposed, and a convex protrusion on the surface of each pressing body protrudes from the lid. A concave engagement portion is formed on the back surface of the slider 5 so as to correspond to each pipe. By moving the slider 5 and appropriately engaging each concave engagement portion and the convex protrusion, the chemical liquid flowing in each pipe is obtained. Is stopped or combined with the chemical liquid flowing in other pipes to supply a desired amount of chemical liquid, or the chemical liquid flows in all the pipes to purge the air in the path.
[Selection] Figure 1

Description

This device relates to a chemical solution injection device and belongs to medical technology.
More specifically, when injecting a chemical solution, the injection amount can be freely selected within a predetermined range, and even when there are a plurality of flow paths, the air in all the paths can be purged. The present invention relates to a chemical injection device that can be used.

There are various portable medical fluid injection devices for the treatment of diseases.
In such a chemical solution injection device, air purge is performed in order to prevent air from entering the body when the chemical solution is injected.

  For example, in Japanese Patent Application Laid-Open No. 09-108344 (Patent Document 1), in a chemical solution injection container in which a nozzle is provided in a flexible container body, a chemical solution discharge valve is provided in the vicinity of the nozzle opening, and the chemical solution discharge valve is provided. There has been proposed a chemical liquid injector provided with a pressure regulating valve from a small hole provided in a nozzle portion in contact with the container body side through a thin tube.

  The pressure regulating valve is opened when the gas in the container body and the nozzle is discharged, and is closed when the chemical liquid in the container body is caused to flow into the narrow tube and the internal pressure of the container body is increased. The chemical solution discharge valve is configured to be opened by the pressure after the internal pressure of the container body exceeds the pressure necessary for closing the pressure regulating valve to seal the opening of the nozzle tip.

  In Japanese Patent Application Laid-Open No. 10-248928 (Patent Document 2), a chemical solution storage section that is filled with a chemical solution, a chemical solution discharge pipe connected to the chemical solution storage section, and a pipe provided in the middle of the pipe, A chemical supply device having a flow rate control device that controls the flow rate using path resistance has been proposed in which a pressure reduction means is provided that can place a pressure-reduced state downstream of the flow rate control device in the pipeline. Yes.

  Furthermore, as a chemical solution continuous infusion device used for local anesthesia and pain medication for postoperative pain, Japanese Patent Laid-Open No. 2003-210577 (Patent Document 3) directly pressurizes a chemical solution pack to drive the liquid. In the chemical liquid continuous injector, a structure in which pressure is uniformly applied to the entire chemical liquid pack so as not to cause damage to the chemical liquid pack and having an air vent port has been proposed.

  Furthermore, in Japanese Patent Application Laid-Open No. 2004-275466 (Patent Document 4), in a chemical solution injection device in which a chemical solution container and a suction type pump are connected, it is possible to prevent bubbles from entering the body or the suction type pump. And a chemical injection device that can ensure the performance of the suction pump.

That is, the chemical injection device described in Patent Document 4 includes a chemical solution container that stores a chemical solution, and a pump that generates a negative pressure in the chemical solution container in order to send the chemical solution from the chemical solution container to a patient. In addition, an air trap filter is disposed in a flow path through which the chemical solution is sent from the chemical solution container to the pump.
As a result, it is said that air bubbles mixed in advance in the chemical solution container and bubbles generated by chemical solution dissolved air being vaporized by the pressure reducing action of the suction pump can be removed by the air trap filter.

Japanese Patent Laid-Open No. 09-108344 (Claim 1, FIG. 2) Japanese Patent Laid-Open No. 10-248928 (Claim 1, FIG. 1) JP 2003-210577 A (Claim 1, FIG. 1) JP-A-2004-275466 (Claim 1, FIG. 1)

  In a conventional chemical injector, even when a plurality of flow paths are provided, it is necessary to perform air purge on each flow path in accordance with the structure, but the time required for air purge is long.

  Furthermore, the flow rate control device provided in the conventional chemical solution injector generally has an orifice with a small cross-sectional area of the flow path, and controls the flow rate in a very small amount by a large pipe resistance when the chemical solution passes through the orifice. It is.

  However, when the air purge (priming) is performed, the chemical solution must pass through the orifice, so that the time required for the air purge becomes long, and as a result, the time until the chemical solution administration becomes long.

  Furthermore, the chemical solution injector described in the above-mentioned patent document has a function of purging the air in the system in advance when the chemical solution is injected, but in the chemical solution injector that is supposed to be carried on a daily basis, There is a problem to be solved structurally.

  In particular, none of the chemical injectors described in the above-mentioned patent documents discloses or suggests a function for accurately supplying a chemical solution quantitatively.

In view of the present situation, this device is capable of selectively and easily injecting different amounts of chemical solutions with a single injector, and capable of reliably purging the air in the path during injection in a short time. An object of the present invention is to provide an injection device.

In order to achieve the above-described object, the device for injecting a chemical solution of the present invention comprises
A chemical solution injection device provided with a chemical solution supply pipe on one side and a chemical solution injection pipe on the other side,
The apparatus main body is composed of a case main body that is open at the top, a lid that closes the opening of the case main body, and a slider that slides on the lid.
The case body incorporates a plurality of pipes with different flow rates inside, and the proximal end side of each pipe is connected to the chemical solution supply pipe, and the distal end side is connected to the chemical solution injection pipe via a junction. And
Each of the pipes is provided with a pressing body that presses the pipe, and the protruding protrusions attached to the surface of each pressing body protrude from the lid, respectively.
The slider is formed with a groove portion corresponding to each pipe on the back surface,
In each of the groove portions, the chemical liquid flowing in each pipe is stopped or engaged with the convex protrusions, or combined with the chemical liquid flowing in another pipe to supply a desired amount of the chemical liquid to the merging portion. Are provided with concave engaging portions of different lengths,
Supplying a desired amount of the chemical solution by engaging and disengaging the convex protrusion protruding on the lid with the concave engagement portion arranged on the back surface of the slider, or allowing the chemical solution to flow in all the pipes, It is configured to purge air in the path.

The device described in claim 2 of this device is
In the chemical injection device according to claim 1,
The apparatus main body is
A lock bar slidable in the longitudinal direction of the case body and a stopper member;
The locking piece attached to the surface of the stopper member is configured to fix the slider by engaging with a concave engaging portion disposed on the back surface of the slider when protruding on the lid. It is characterized by.

  The chemical solution injection device according to the present invention can select the injection amount freely and easily within a predetermined range when the chemical solution is injected, so that the chemical solution can be accurately and easily supplied in a fixed quantity.

Furthermore, since the chemical liquid injection device according to the present invention can reliably purge the air in all the routes during injection in a very short time, the chemical liquid can be quickly administered.

It is a schematic explanatory drawing which shows an example of the injection device of the chemical | medical solution concerning this device. It is a perspective view of the principal part of the injection device of the chemical | medical solution shown in FIG. It is a schematic explanatory drawing inside the case main body which comprises the said apparatus main body. It is a schematic explanatory drawing of the state which attached the press body to the pipe of the said case main body. It is a schematic explanatory drawing which shows the state which removed the slider about the said apparatus main body. It is a schematic explanatory drawing of the back surface of the slider which comprises the said apparatus main body. It is a schematic explanatory drawing which shows other embodiment of the injection apparatus of the chemical | medical solution concerning this device. It is a schematic explanatory drawing which shows one Example of the injection device of the chemical | medical solution concerning this device.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a chemical liquid injection device according to the present invention will be specifically described below with reference to the accompanying drawings.
The device for injecting a chemical solution according to the present invention is not limited to the illustrated embodiment, and can be improved within a range not changing the gist of the device.

As shown in FIG. 1, a chemical solution injection device 1 according to the present invention includes a device main body 2, a chemical solution supply pipe 3 provided on one side of the device main body 2, and a chemical solution injection provided on the other side. And a pipe 4 for use.
The chemical liquid supply pipe 3 is composed of, for example, a liquid supply tube having a conduit function and a flow rate adjusting function described in Japanese Patent Application Laid-Open No. 2001-212233.
Accordingly, the flow rate of the chemical liquid passing through the pipe 3 is controlled to be a very small amount.

  As shown in FIGS. 1 and 2, the apparatus main body 2 includes a case main body 6 having an upper opening, a lid 7 that closes the opening of the case main body 6, and a slider that slides on the lid 7. It is composed of five.

  In FIG. 2, guide grooves are formed on both side surfaces of the slider 5 in the longitudinal direction so as to be slidably fitted to both side surfaces of the lid body 7 in the longitudinal direction. It is configured to slide.

As shown in FIG. 3, the case body 6 includes a plurality of pipes 10 with different flow rates.
Specifically, the case body 6 is
1) Flow rate is 0.5ml / hr
2) Flow rate is 1.0ml / hr
3) The flow rate is 2.0 ml / hr and 4) The flow rate is 4.0 ml / hr.
The four pipes 10 are incorporated.
The number of the pipes 10 is not particularly limited, and may be appropriately selected so as to obtain a desired injection amount.

  In this device, the flow rate of the pipe is made different by adopting the liquid supply tube described in JP-A-2001-212233 and changing the shape of its core.

  When selecting pipes having different flow rates, the flow rate of the pipes can be changed by a conventionally known method such as appropriately changing the cross-sectional area of each pipe.

  The proximal end side of each pipe 10 is connected to the chemical solution supply pipe 3, and the distal end side is connected to the chemical solution injection pipe 4 via the junction portion 11.

  In this device, the convex protrusion 13 protruding on the lid body 7 is engaged with and disengaged from the concave engagement portion 17 arranged on the back surface of the slider 5, thereby supplying a desired amount of chemical solution and shortening the time. A reliable air purge is achieved.

As shown in FIG. 4, each pipe 10 is provided with a pressing body 12 that presses the pipe 10, and a convex protrusion 13 is attached to the surface of each pressing body 12.
A through hole is formed in the lid body 7 so as to correspond to the convex protrusion 13 of the pressing body 12 on each pipe 10, and the lid body 7 is attached to the case body 6 as shown in FIG. When attached, the protruding protrusions 13 are configured to protrude from the through holes of the lid body 7.

As shown in FIG. 6, the slider 5 has a groove 16 formed on the back surface thereof corresponding to the pipes 10.
In each of the grooves 16, a desired amount of the chemical solution is joined by engaging the convex protrusion 13 and stopping the chemical solution flowing in each pipe 10 or adding the chemical solution flowing in the other pipe 10. A concave engaging portion 17 having a different length for supplying to the portion 11 is provided.

When the convex protrusion 13 is engaged with the concave engagement portion 17 on the back surface of the slider 5, the pipe 10 is not pressed by the pressing body 12, and in this state, the chemical solution flows through the pipe. Become.
On the other hand, when the convex protrusion 13 does not engage with the concave engagement portion 17 on the back surface of the slider 5, the pipe 10 is pressed by the pressing body 12 and the pipe line is blocked, so that the chemical solution is contained in the pipe. Can no longer flow.

  For example, when a chemical solution is injected at a flow rate of 5.0 ml / hr, a pipe through which the chemical solution flows at a flow rate of 1.0 ml / hr and a pipe through which the chemical solution flows at a flow rate of 4.0 ml / hr are not pressed. What is necessary is just to slide the slider 5 to the position which presses.

  In this device, when the slider 5 is slid so that the chemical solution flows in all the pipes 10, the air purge in the path is performed.

About the material of the said pipe 10, since the said pipe needs to be interruptable | blocked by the press of the said press body, it is preferable to select what has flexibility.
Examples thereof include various resins such as soft polyvinyl chloride, polyethylene, polypropylene, and ethylene-vinyl acetate copolymer, and various rubbers such as silicone rubber.
Among these, it is more preferable to select silicone rubber.

On the surface of the lid body 7, a number indicating the injection amount of the chemical solution is written.
Therefore, when a number indicating a desired injection amount is displayed on the elliptical window 18 having a required diameter provided on the slider 5, the back surface of the slider 5 is set so that the chemical flows at the injection amount corresponding to the number. The concave engaging portion 17 is formed.

As shown in FIGS. 3 and 4, a lock bar 8 and a stopper member 14 slidable in the longitudinal direction are disposed inside the case body 6.
A locking piece 15 is attached to the surface of the stopper member 14. When the lock bar 8 is pushed and slides toward the inside of the case body 6, the tip pushes up the stopper member 14 from below. The locking piece 15 is also pushed up.
On the other hand, since a through hole is formed in the lid body 7 so as to correspond to the locking piece 15 of the stopper member 14, the lock bar 8 is placed inside the case body 6 as shown in FIG. 5. When sliding toward, the locking piece 15 protrudes from the through hole.

As shown in FIG. 6, the slider 5 has a groove portion 16 formed on the back surface thereof corresponding to the lock bar 8. The groove portion 16 is engaged with the locking piece 15, Since a plurality of concave engaging portions 17 for fixing the slider 5 are provided, when the locking piece 15 protrudes on the lid body 7, it engages with the concave engaging portion 17 disposed on the back surface of the slider 5. Thus, the slider 5 can be fixed.
With this configuration, it is possible to prevent the flow rate from being erroneously changed during the injection of the chemical solution.

In order to make the fixed slider 5 slidable again, one end of the lock release bar 9 is inserted from the lock release bar insertion port formed on the side surface in the short side of the apparatus main body 2 so as to face the lock bar 8. Thus, the lock bar 8 is configured to be pushed out from the apparatus main body 2 (case main body 6).
As a result, the stopper member 14 is lowered and does not protrude onto the lid 7, so that the fixing of the slider 5 is released.

In this device, as shown in FIG. 7, the apparatus main body 2 may be provided with a plurality of pipes for injecting a chemical solution according to the patient's pathological condition and the like.
Thereby, it becomes possible to inject | pour a chemical | medical solution simultaneously into the several affected part of a patient.

As shown in FIG. 8, a chemical solution bottle (chemical solution storage unit) 20 filled with a chemical solution is connected to the chemical solution supply pipe 3 of the chemical solution injector 1 through a connector 19.
Furthermore, the tip of the chemical solution injection pipe 4 of the chemical solution injection device 1 is connected to an injection needle (not shown) via a connector 21, and the chemical solution is injected from this injection needle to the patient.
A filter for removing foreign substances and the like is provided in the middle of the pipe 4 for injecting the chemical solution.

In injecting the chemical solution, first, the slider 5 of the apparatus main body 2 is slid to purge the air in the path so that the chemical solution flows through all the pipes.
Specifically, the apparatus main body 2 (specifically, the case main body) has four pipes with chemical liquid flow rates of 0.5 ml / hr, 1.0 ml / hr, 2.0 ml / hr, and 4.0 ml / hr. The slider 5 is slid to a position where “7.5 ml / hr” is displayed in the window.

Thereafter, an injection needle is punctured into a blood vessel or the like in the vicinity of the affected area of the patient, the slider 5 is slid to a position where the drug solution is injected at a desired flow rate, and the slider 5 is fixed by pushing the lock bar 8 to the patient. A chemical solution having a desired flow rate is injected.

The chemical solution injection device according to this device can reliably purge the air in all the routes during injection in a short time, so that the chemical solution can be quickly administered and the chemical solution can be precisely and easily obtained. It can be supplied in a fixed amount to the medical industry and is widely used in the medical industry.

DESCRIPTION OF SYMBOLS 1 Chemical liquid injection apparatus 2 Apparatus main body 3 Chemical liquid supply pipe 4 Chemical liquid injection pipe 5 Slider 6 Case main body 7 Cover body 8 Lock bar 9 Lock release bar 10 Pipe 11 Junction part 12 Press body 13 Convex protrusion 14 Stopper member DESCRIPTION OF SYMBOLS 15 Locking piece 16 Groove part 17 Concave engaging part 18 Window part 19 Connector 20 Chemical solution bottle (chemical solution storage part)
21 Connector 22 Filter 23 Lock release bar insertion port 24 Cap

Claims (2)

A chemical solution injection device provided with a chemical solution supply pipe on one side and a chemical solution injection pipe on the other side,
The apparatus main body is composed of a case main body that is open at the top, a lid that closes the opening of the case main body, and a slider that slides on the lid.
The case body incorporates a plurality of pipes with different flow rates inside, and the proximal end side of each pipe is connected to the chemical solution supply pipe, and the distal end side is connected to the chemical solution injection pipe via a junction. And
Each of the pipes is provided with a pressing body that presses the pipe, and the protruding protrusions attached to the surface of each pressing body protrude from the lid, respectively.
The slider is formed with a groove portion corresponding to each pipe on the back surface,
In each of the groove portions, the chemical liquid flowing in each pipe is stopped or engaged with the convex protrusions, or combined with the chemical liquid flowing in another pipe to supply a desired amount of the chemical liquid to the merging portion. Are provided with concave engaging portions of different lengths,
Supplying a desired amount of the chemical solution by engaging and disengaging the convex protrusion protruding on the lid with the concave engagement portion arranged on the back surface of the slider, or allowing the chemical solution to flow in all the pipes, An apparatus for injecting chemical liquid, wherein the apparatus is configured to purge air in the passage. The apparatus main body is
A lock bar slidable in the longitudinal direction of the case body and a stopper member;
The locking piece attached to the surface of the stopper member is configured to fix the slider by engaging with a concave engaging portion disposed on the back surface of the slider when protruding on the lid. The chemical | medical solution injection apparatus of Claim 1 characterized by these.

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