JP2002078797A - Liquid smapling device for shot injection, and adapter for liquid communication - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid sampling device for shot injection, by which a syringe for shot injection is formed to prevent the erroneous connection of a male connecting part and the line of a venous dropper set and a medical liquid can be charged to be communicated with a medical liquid container. SOLUTION: This device is provided with a syringe 5 for shot injection and an adapter 1 for liquid communication, and the syringe for shot injection is provided with the make connecting part having a lure taper. The adapter for liquid communication is provided with a cannula 2 capable of sticking through the stopper of the medical liquid container and an inserting part 3 communicating with the cannula. The male connecting part of the syringe for shot injection has a form incapable of insertion to a female connecting member having a lure tape suited to the ISO standard. The inserting part has a stretching part composed of a material to be extended in the direction of the diameter by the inserting pressure of an insert and can be connected to the male connecting part of the syringe for shot injection within the range of the extension.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shot injection sampling apparatus for filling a syringe for shot injection used for enteral tube feeding or the like with a drug solution from a drug solution container. Further, the present invention relates to a liquid communication adapter used for the same.

[0002]

2. Description of the Related Art Enteral tube feeding is a nutritional supplementation method in which fluid nutrients are administered nasally and gastrointestinally through a flexible thin tube or from a gastrostoma or jejunostomy. Infusion devices and devices similar to those used for infusions to be administered to patients are used. That is, a nutritional drip set that connects a nutrition flow outlet provided in a container such as a soft bag suspended on a stand to a gastrointestinal enteral nutrition catheter applied to a patient, and a gastrointestinal drug from a side line of the nutritional drip set. For a newborn baby, an injector for shot injection of milk is used.

[0003] In recent years, central venous nutrition, in which parenteral nutrition is supplied to a single patient via an intravenous catheter, and enteral tube nutrition have been performed in parallel. When supplying nutrition, a burden is imposed on operators such as nurses. This is because there must be no mistake in connection. If a drug such as an enteral nutrition or a gastrointestinal drug flows into an intravenous line, the patient is likely to die. Also, if an infusion administered intravenously into the gastroenteral feeding line, it may cause diarrhea, etc., even if it does not result in death, which is a serious problem for debilitated patients. Sometimes.

[0004] Therefore, each connecting portion of the gastrointestinal enteral nutrition infusion set is configured to be connectable only to a dedicated connector, and the connector (ISO (International Organization for Standardization) standard) is connected to the intravenous infusion set. It is conceivable to use a tool that cannot be physically connected to a male connecting member or a female connecting member having a luer taper suitable for the following (hereinafter also abbreviated as “general-purpose connector”).

[0005]

However, as a syringe connected to the side line at the time of shot injection,
General-purpose syringes still tend to be used. The reason is as follows. That is, the syringe for shot injection must first fill the syringe with a drug solution stored in a drug solution container such as a vial bottle or ampoule bottle before injecting the shot into the gastroenteral feeding set. I have to. At this time, it is easy to use an injection needle (a general-purpose one having a 6/100 taper) as a means for bringing the drug solution container and the syringe for shot injection into liquid communication, and it is a simple and convenient medical alternative to it. No tools were provided.

[0006] In recent years, however, market demands for "there is no risk of erroneous connection" have been rapidly increasing. Therefore, during administration of the enteral nutritional supplement, the connection line that is most frequently connected and disconnected, the side line and the shot injection syringe connected to the side line are physically different from the general-purpose connection portion and the connector. It has become necessary to make it in an unconnectable form. In addition, there is an urgent need to provide a medical device capable of performing a prescription without largely changing the conventional operation even if such a change is made.

In view of the above, the present invention provides a configuration in which the male connection of the shot injection syringe is prevented from being erroneously connected to the line of the intravenous drip set, and the shot injection syringe is in liquid communication with the drug solution container. It is an object of the present invention to provide a shot-injection liquid sampling device that can be filled with a chemical solution by using a liquid.

[0008]

A shot injection liquid sampling apparatus according to the present invention includes a shot injection syringe and a liquid communication adapter. The shot injection syringe is provided integrally with the syringe section and the syringe section. A male connection having a luer taper provided. The liquid communication adapter includes a cannula that can pierce the stopper of the drug solution container, and an insertion portion that communicates with the cannula. The male connection portion of the syringe for shot injection has a shape that cannot be inserted into a female connection member having a Luer taper conforming to the ISO (International Organization for Standardization) standards. The insertion portion has a telescopic portion made of a material that expands in the diameter direction due to the insertion pressure of the insert, and can be connected to the male connection portion of the syringe for shot injection within the range of expansion.

[0009] According to this configuration, the shot injecting syringe that has been changed into a shape that is not liable to be erroneously connected to the connector of the intravenous infusion set is used and the inside thereof is connected via the liquid communication adapter. The drug solution can be filled from the drug solution container. In addition, the filling operation is not different from the case where the needle is attached to a general-purpose syringe, and can be accepted without any difficulty by the operator.

In the above configuration, preferably, the male connection portion of the syringe for shot injection has an outer diameter at the tip end thereof.
The female connection member having a luer taper conforming to the ISO standard is configured to be larger than the inner diameter of the connection end.
According to this configuration, there are the following advantages as compared with a case where the outer diameter of the distal end portion is reduced to prevent erroneous connection. In other words, enteral nutrients are more viscous than infusions administered intravenously, so if the method of reducing the outer diameter of the tip is used, the injection pressure will be too high when injecting shots. Not practical. On the other hand, if the outer diameter of the distal end portion is increased, the risk of erroneous connection can be eliminated without hindering shot injection of an enteral nutritional supplement or the like.

The liquid communication adapter according to the present invention is used in the shot injection liquid sampling apparatus having the above-described configuration. And it has a cannula which can penetrate the plug of a medical-solution container, and an insertion part which communicates with a cannula. The insertion portion has a telescopic portion made of a material that expands in the diameter direction due to the insertion pressure of the insert, and can be connected to the male connection portion of the syringe for shot injection within the range of expansion.

By providing the liquid communication adapter having this configuration, it is possible to use a syringe that cannot be connected to the connector of the intravenous infusion set as the lure of the syringe for shot injection. That is, the side line of the gastrointestinal enteral nutrition infusion set is configured to be connected to a general-purpose syringe because there is no simple means for enabling communication of the liquid between the shot injection syringe and the drug solution container. In order to eliminate the situation, the side line can be configured to be connectable only to a dedicated connector. Therefore, the syringe for shot injection connected to the side line cannot be connected to the connector of the intravenous infusion set. Conversely, since the lure of a general-purpose syringe will not be physically connectable, the connector connected to the intravenous infusion set may be incorrectly connected to the line of the gastric enteral nutrition set. Is prevented.

Further, according to the liquid communication adapter having the above configuration, even when the luer diameter of the shot injection syringe, which is much larger than the luer diameter of the general-purpose syringe, has poor dimensional accuracy, the liquid communication adapter can be used. And the syringe can be connected in a liquid-tight manner and well. Further, even if the lure diameter of the syringe for shot injection provided by each company is slightly different from the optimum diameter, connection can be made possible.

[0014]

(Embodiment 1) FIG. 1 shows a liquid injector for shot injection according to Embodiment 1 of the present invention. Reference numeral 1 denotes a liquid communication adapter, which includes a cannula 2 and an insertion portion 3 as main members, and both are in communication. Reference numeral 5 denotes a syringe for shot injection, and the insertion portion 3
Through the opening 33 provided in the liquid communication adapter 1
Is connected to At the end of the insertion portion 3 on the opening 33 side,
The cap 4 is connected by a hinge 41. A flange 34 is provided on the proximal end side of the cannula 3.

FIG. 2 is an exploded view of the apparatus of FIG. 1, wherein (a) shows the adapter 1 for liquid communication and (b) shows the syringe 5 for shot injection. The shot injection syringe 5 includes a syringe portion 51 and a male connection portion 52 having a Luer taper. By fitting the male connection portion 52 into the insertion portion 3 of the liquid communication adapter 1, the liquid communication adapter 1 and the syringe 5 for shot injection are connected. The male connecting portion 52 has a shape that cannot be inserted into a female connecting member (general-purpose connector) having a luer taper conforming to the ISO standard. Specifically, for example, the diameter of the tip end is made larger than that of a general-purpose connector. Alternatively, a shape having a taper larger than the 6/100 taper of a general-purpose connector may be used.

FIG. 3 shows a front sectional view of the insertion portion 3. The insertion section 3 includes a luer contact section 31 having an opening 33 and a cannula connection section 32. Luer contact part 3
The male connection part 52 of the syringe 5 for shot injection is inserted through the opening 33 into one lumen. Luer contact part 31
Has a taper whose inner diameter is reduced from the open end where the syringe is inserted toward the end where the cannula 2 is connected. The insertion portion 3 including the luer contact portion 31 is made of a material that can be extended in the diameter direction by the insertion pressure of the insert.

According to the luer contact portion 31 having this configuration, even if the luer size of the male connection portion 52 is slightly smaller or larger than the optimum size, the difference can be absorbed. That is, the elastic modulus, the taper, the dimensions, and the like are set so that the luer contact portion 31 can be connected to the male connection portion 52 within the range in which the lure contact portion 31 extends. In other words, by utilizing the fact that the luer contact portion 31 expands in the diameter direction due to the insertion pressure of the insert, liquid-tight connection is possible by appropriately adjusting the insertion depth of the syringe lure to the lure contact portion 31. is there. Therefore, an appropriate connection can be obtained even if the male connection portion 52 has the shape as described above.

Further, if the insertion section 3 is formed of the above-mentioned material, the remaining drug solution in the insertion section 3 can be dropped into the chemical bottle by pumping the insertion section 3. Thus, it is possible to suppress the drying of the chemical solution in the insertion section 3.

Examples of the material that can be expanded in the diameter direction by the insertion pressure of the insert include soft synthetic resins such as vinyl chloride, polyurethane, and polyolefin elastomer. The degree of flexibility of the insertion part 3 is 6
0 to 100 (degrees) is appropriate. This hardness is a value measured by a durometer A (HDA) (JISk7215).

As shown in FIG. 3, cannula connection 32
Has an inner diameter substantially the same over the entire length, and is connected to the cannula 2 by fitting. However, the liquid communication adapter of the present invention does not require any particular limitation on the connection form between the cannula 2 and the insertion portion 3,
Both members may be connected by an adhesive or the like.

The form of the cannula 2 is not particularly limited. However, the tip can be pierced by a normal piercing pressure into the rubber stopper at the mouth of the drug solution container, but has a sharpness that does not penetrate the human body even if it accidentally hits the human body. Preferably, there is.
Specifically, the puncture resistance value is specified to be 50 g or more. This puncture resistance value is defined as the maximum value of the load when a needle is pierced vertically into a 0.05 mm thick polyethylene sheet at a speed of 25 mm / min.

Further, it is preferable that the distal end portion of the cannula 2 is closed and an opening is provided in a side wall so that coring does not occur. The material of the cannula 2 is not particularly limited, either, and may be metal, plastic, or the like.

The cap 4 is used to cover the opening 33 while the liquid communication adapter 1 is punctured in the liquid medicine container. The medicinal solution in the medicinal solution container is used not only when it is used up at one time but also in several times. In such a case, by using the cap 4, it can be stored as it is for a while.

Further, when the liquid communication adapter 1 is pierced into the chemical solution container, the flange 34 is brought into contact with the mouth of the chemical solution container, thereby forming the liquid communication adapter 1.
The wobble can be reduced, and the operability can be improved. As the flange 34, for example, a projecting piece extending in at least two directions on the side surface of the proximal end of the cannula 2, a circular plate extending annularly from the side surface of the proximal end of the cannula 2,
For example, a disk having a slit formed as a space for piercing the opening of the container with a needle for bleeding air can be used.

The color of the insertion portion 3 is preferably a color other than red, blue, green and white, for example, yellow. Conventionally, red has been used as a color reminiscent of "artery" and blue has been used as a color reminiscent of "vein". It is often used as a color for medical devices. Yellow is a different color from these, and is also a suitable color to call attention.

(Embodiment 2) FIG. 4 is a front view of a liquid communication adapter 1 according to Embodiment 2, and FIG.
FIG. 5 is a front sectional view of an insertion section 3 of the liquid communication adapter 1 shown in FIG. 4.

In this embodiment, the cannula 2a
However, apart from the chemical solution passage, there is provided a gas passage opening at a ventilation port 36 provided on the side wall of the proximal end of the cannula 2a and opening at the tip of the cannula 2a. The vent 36 is provided with a filter for purifying outside air.

Also, as shown in FIG.
A ring-shaped member 35 made of a material that can be compressed and deformed by the insertion pressure of the insert is mounted on the inner wall of the body. When the insert is inserted, the ring-shaped member 35 comes into close contact with the outer periphery of the insert, enabling a liquid-tight connection. Further, even if the lure of the syringe has a slight error with respect to the optimal dimension, a liquid-tight connection is possible by the compression deformation of the ring-shaped member 35. Examples of the material of the ring-shaped member 35 include vinyl chloride, polyurethane, and polyolefin-based elastomer.

[0029]

According to the liquid injection device for shot injection according to the present invention, the male connection portion of the syringe for shot injection is formed into a shape that is not liable to be erroneously connected to the transvenous infusion set.
The liquid medicine can be filled into the shot injection syringe from the liquid medicine container via the liquid communication adapter. Also,
The filling operation is not different from a case where a needle is usually mounted on a syringe, and is accepted without any difficulty by the operator.

[Brief description of the drawings]

FIG. 1 is a front view of a liquid injection device for shot injection according to a first embodiment.

FIG. 2 is an exploded front view of the apparatus of FIG. 1 divided into a shot injection syringe and a liquid communication adapter.

3 is a front sectional view showing an insertion portion of the liquid communication adapter of FIG. 2;

FIG. 4 is a front view of a liquid communication adapter according to a second embodiment.

FIG. 5 is a front sectional view showing an insertion portion of the liquid communication adapter shown in FIG. 4;

[Description of Signs] 1 Adapter for liquid communication 2, 2a Cannula 3 Insertion part 31 Luer contact part 32 Cannula connection part 33 Opening 34 Flange 35 Ring 36 Vent 4 Cap 41 Hinge 5 Syringe for shot injection 51 Syringe part 52 Male connection Department

Claims (7)

[Claims] 1. A syringe for shot injection and an adapter for liquid communication, wherein the syringe for shot injection includes a syringe portion and a male connection portion having a Luer taper integrally provided with the syringe portion, The liquid communication adapter includes a cannula capable of penetrating a stopper of a drug solution container, and an insertion portion communicating with the cannula. The male connection portion of the shot injection syringe includes an ISO connector.
(International Organization for Standardization) It has a shape that cannot be inserted into a female connection member having a Luer taper that conforms to the standard. A liquid injector for shot injection, characterized in that the liquid injector has a male connection part of the shot injection syringe within a range in which the syringe extends. 2. The male connecting portion of the shot injection syringe has an outer diameter at a tip portion larger than an inner diameter at a connecting end portion of a female connecting member having a luer taper conforming to the ISO standard. The liquid sampling apparatus for shot injection according to claim 1, wherein: 3. A liquid communication adapter used in the shot injection liquid sampling device according to claim 1 or 2, wherein a cannula capable of piercing a stopper of a chemical solution container and an insertion portion communicating with the cannula. The insertion portion has an expansion / contraction portion made of a material that expands in the diameter direction due to the insertion pressure of the insertion body, and can be connected to the male connection portion of the shot injection syringe within the expansion range. An adapter for liquid communication, characterized in that: 4. The liquid communication adapter according to claim 3, wherein the expansion and contraction portion is configured by the insertion portion being made of a material that expands in a diameter direction by an insertion pressure of the insertion body. 5. The liquid communication adapter according to claim 4, wherein the insertion portion is made of a soft synthetic resin. 6. The cannula is closed when its tip is closed, has an opening in its side wall, and has a needle inserted vertically into a 0.05 mm thick polyethylene sheet at a vertical speed of 25 mm / min. The liquid communication adapter according to claim 3, wherein the needle has a puncture resistance value defined by the maximum value of the load of 50 g or more. 7. The expansion / contraction part is provided in a lumen of the insertion part so as to be in contact with the insertion body, and is constituted by a projection made of a material that is compressed and deformed by an insertion pressure of the insertion body. 4. The liquid communication adapter according to claim 3, wherein: