JPH11114072A - Infusion set - Google Patents

Abstract

(57) [Problem] To provide an infusion set in which the flowability of a drug solution is not affected by the material and shape of an infusion container. An infusion set includes an infusion container (1) having an engagement means (protrusion) 111 on an outer wall of a mouth portion (11), and a front end portion capable of fitting to an inner wall of the mouth portion (11) of the infusion container (1). A connecting member 2 having a tubular shape, a female locking means 3 attached to the outside of the connecting member 2, and a drip tube 4 connected to a base end 24 of the connecting member 2. 2 has a ventilation hole 2 provided with an air filter 28
6 and a gas passage 27 communicating with the ventilation hole 26 and opening at the front end is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an infusion set in which an infusion container and an infusion tube can be connected without using a bottle needle or a communication needle.

[0002]

2. Description of the Related Art Conventionally, a drip set comprising a drip tube and a drip tube filled with a physiological saline solution, a medicinal solution, etc., is communicated by piercing a rubber stopper at the mouth of an infusion bottle with a bottle needle. Things are known. However, this drip set not only has the danger of leaking liquid from the puncture site, but also causes the bottle needle to drop off from the rubber stopper when the patient moves or is caught by hand during drip treatment, Therefore, there is a risk that an accidental puncture accident may occur.

As a solution to such a drawback, an infusion container provided with a drip connection tube as shown in FIG. 4 has been proposed (see Japanese Patent Application Laid-Open No. 7-241344). In this apparatus, a communication part connecting the infusion container 61 and the drip connection pipe 66 is connected to the guide cylinder 63, the communication needle 65, and the pushing operation member 64.
The upper end of the guide tube 63 is fixed to the outer periphery of the mouth 611 of the infusion container 61 in an airtight manner, and the pushing operation member 64 is disposed in the lower end side of the guide tube 63 in an airtight manner. The communication needle 65 is disposed between the sealing plug 62 of the mouth portion 61 and the push-in operation member 64 in the guide cylinder 63, and by moving the push-in operation member 64 upward.
Is moved to the infusion container 61 side, and the hermetic plug 62 is pierced. However, in the above-mentioned infusion container, a rubber stopper is mainly used as a hermetic stopper. Therefore, when the hermetic stopper is pierced with a communication needle, rubber fragments are generated (referred to as coring), which may be mixed into the chemical solution. . In addition, there is a risk that the communication needle pierced through the hermetic plug penetrates the hermetic plug and protrudes too much into the infusion container, so that the drug solution remains. Furthermore, the connection structure is complicated.

As a solution to the above problem, the present applicant has already applied for a patent for an infusion set as shown in FIG. 5 (Japanese Patent Application No. 9-54914). This is a drip container 7 having an opening 71 whose inner wall is formed in such a manner that the inner wall is tapered in the distal direction and a projection 711 is provided on the outer wall, and which is fitted with the opening 71. Connecting member 8 having a possible distal end 81 and a proximal end 82 to which the tube is connected
A locking means 9 attached to the outside of the connecting member 8 in the vicinity of the distal end portion 81 and having an internal wall formed with a female screw 91 capable of being screwed with the ridge 711; It is an infusion set including an infusion tube 10 connected to the base end portion 82. Since a bottle needle or a communication needle is not used for connecting the infusion container and the infusion tube,
There is no problem of coring of the rubber stopper, and there is no possibility that the chemical solution remains in the container.

[0005]

However, the drip set shown in FIG. 5 has a drawback that the flowability of the drug solution is deteriorated depending on the material and shape of the drip container. For example, when a hard plastic is used as the material of the drip container or when a bottle is used as the shape of the drip container, the container is unlikely to be deformed flat and the flowability of the drug solution is significantly reduced. The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an infusion set in which the flowability of a drug solution is not affected by the material and shape of an infusion container.

[0006]

Means for Solving the Problems The present inventors have conducted intensive studies to solve the above-mentioned problems, and as a result, have found that
It has been found that by providing a vent provided with an air filter and a gas passage communicating with the vent and opening at the distal end, a good flowability of the drug solution is always obtained regardless of the material and shape of the drip container. Reached the present invention. That is, the present invention provides a drip container having an inner wall formed by expanding the inner wall in a tapered shape in the distal direction and having an outer wall provided with an engagement means, and capable of fitting to the inner wall of the opening. A tubular connecting member having a proximal end to which a tube is connected with a distal end, and an inner wall attached to the outside of the connecting member close to the distal end, and capable of being screwed with the engaging means on an inner wall. And a drip tube connected to the base end of the connecting member, wherein the connecting member has a vent wall provided with an air filter. A drip set, characterized in that a gas passage communicating with the vent hole and opening at the tip is provided. Here, it is preferable that the locking means be rotatable by the connecting member in order to improve the operability, and it is more preferable that the locking means be slidable by a predetermined distance in the base end direction of the connecting member. The air hole may be provided with a check valve adjacent to the air filter so that the liquid medicine does not leak out of the air filter, or the air filter may be formed of a hydrophobic filter.

[0007]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing one embodiment of the drip set of the present invention, FIG. 2 is an enlarged longitudinal sectional view of the connecting member and the lock means shown in FIG. 1, and FIG. 3 is a perspective view of the drip container shown in FIG. (Showing the state before use). As shown in FIG. 1, the drip set of the present invention includes a drip container 1 having an engagement means (projection) 111 on an outer wall of a mouth portion 11, and an inner wall of a mouth portion 11 of the drip container 1. Fittable tip 21
, A female locking means 3 attached to the outside of the connecting member 2, and a drip tube 4 connected to a base end 24 of the connecting member 2. Is characterized in that a ventilation hole 26 provided with an air filter 28 and a gas passage 27 communicating with the ventilation hole 26 and opening at the distal end are provided in the tube wall of the first embodiment.

The infusion container 1 is a container for storing a physiological saline solution, a drip infusion liquid, etc., and has an opening 11 for letting out the physiological saline, the drip infusion liquid, and the like, and an infusion stand (shown in the figure). (Not shown). The inner wall of the mouth portion 11 is formed in a tapered shape whose diameter increases toward the front end, and a ridge 111 as an engagement means is formed on the front end portion (preferably the front end) of the outer wall. The drip container 1 is integrally formed of a plastic such as polyethylene or polypropylene having resistance to a physiological saline solution or a drip solution, and before use, as shown in FIG. 3, a so-called twist-off type closing member 13. The opening of the mouth portion 11 is closed. The closing member 13 is a tab 13 having a fragile portion 131 formed at a portion in contact with the mouth portion 11.
The tab 132 is twisted and rotated so that the tab 132 is broken from the mouth 11 at the fragile portion 131. The shape of the drip container 1 is not limited to the bottle shape shown in FIGS. 1 and 3, and may be, for example, a bag shape. Also, in FIG.
As an example, a relatively thick annular ridge is shown at any opposing position, but the engaging means of the present invention is not limited to this shape, and for example, a male screw is formed. You may.

As shown in FIG. 2, the connecting member 2 has a distal end 21 formed at the distal end so as to be fitted to the inner wall of the mouth 11 of the drip container 1 and a proximal end to which the drip tube 4 is connected. It is a tubular member having a portion 24, and the locking means 3 is attached so as to cover the outside of the tip portion 21 in the vicinity of the tip portion 21. The locking means 3 may be fixed to the connecting member 2 or may be rotatable, or may be rotatable and slidable in the proximal direction as shown in FIG. The connecting member 2 is provided with a chemical liquid passage 25 penetrating from the base end to the distal end, and a gas passage 27 communicating with a vent hole 26 opened at the distal end and provided in the tube wall. A filter 28 is provided. The vent 26 may be further provided with a check valve 29 adjacent to the air filter 28 if necessary. The air holes 26 are air filters 28
May be closed by a cap member 5 for protecting the cap member 5 in this case.
And a ring-shaped member 52 which is a portion attached to the ventilation hole 26
And the air filter 28 and the check valve 29 may be provided in the ring-shaped member 52. Reference numeral 53 denotes a pressing member for attaching the air filter 28 and the check valve 29 to the open end of the ventilation hole 26.

The distal end portion 21 of the connecting member 2 is formed so as to taper toward the distal end in accordance with the shape of the inner wall of the mouth portion 11 of the drip container 1.
And the gas passage 27 is open. Then, as shown in FIG. 2, when the lock means 3 is attached so as to be rotatable and slidable in the base end direction, the lock means 3 is provided at a predetermined interval on the base end side of the distal end portion 21. Annular projections 22 and 23 are provided as locking means for preventing falling off. The outer diameter of the annular projections 22 and 23 may be any size as long as the base end 31 of the locking means 3 is locked. Here, the locking means is not limited to a means formed continuously along the outer circumference, but may be a projection like a dot scattered along the outer circumference. Incidentally, the annular projection 23 may be formed in a flange shape as in this embodiment. In this case, the annular projection 23 serves as a locking means locking means and also serves as a means for hooking a finger when connected to the drip container 1. This is convenient because the connecting member 2 is easily fitted into the mouth 11 of the container 1. The annular projections 22 and 23 are provided at a predetermined interval.
When the distal end 21 is fitted into the mouth 11 of the drip container, the distance is not particularly limited as long as the locking means 3 can slide so as not to prevent the distal end 21 from being fitted into the mouth 11.

As the air filter 28 attached to the vent 26, a porous membrane having pores having a pore diameter of 0.2 to 0.5 microns is preferably adopted. As the porous film, those having hydrophobicity are preferable, and polytetrafluoroethylene, polyvinylidene fluoride, or the like is used as a forming material. The vent 26 is further provided with a check valve 291 adjacent to the air filter 28 in order to ensure the prevention of leakage of the chemical solution.
May be provided. The check valve 29 and the air filter 28
Thus, air free of bacteria can be introduced without leaking from the vent hole 26. In this embodiment, as the check valve 29, a so-called duckbill check valve having a pointed closed end is shown, but in addition to this valve, an umbrella valve, a flap valve, a poppet valve, A ball valve or the like may be employed.

The locking means 3 is a hood-shaped member having a hole through which the connecting member 2 can be inserted at the base end 31 thereof.
1 is mounted on the outside of the connecting member 2 close to the distal end portion 21 so that 1 is on the base end side of the connecting member 2, and is preferably rotatable and slidable along the outer wall of the connecting member 2. I have. The sliding distance of the locking means 3 is regulated by two annular projections 22 and 23 provided on the outer wall of the connecting member 2, and the base end 31 is locked by the annular projection 23 from the position locked by the annular projection 22. You can move to the position. On the inner wall of the locking means 3, a female screw 32 which can be screwed with the engaging means 111 of the mouth 11 of the drip container 1 is formed. If the tip 21 of the connecting member 2 and the mouth 11 of the drip container 1 are merely fitted, there is a risk of falling off at the time of drip. Is eliminated. The drip tube 4 connected to the connecting member 2 usually includes a drip tube, a roller clamp, and the like (not shown), and a puncture needle at the other end.

Next, the use of the drip set of the present invention will be described. The distal end 21 of the connecting member 2 is fitted into the mouth 11 of the drip container 1 from which the closing member 13 has been removed, and the locking means 3 is screwed into the ridge 111. This completes the connection between the drip container 1 and the connecting member 2. Next, the drip container 1
Is suspended on a drip stand (not shown), and the drip tube 4 is filled with the drug solution in the drip container 1 by operating a roller clamp. Finally, if the patient is punctured with a puncture needle connected to the end of the drip tube 4, the roller clamp can be opened to inject the drug solution into the patient's body. At this time, since the drug solution flows out of the drip container 1 and air is introduced into the drip container 1 through the gas passage 27 from the ventilation hole 26 into the drip container 1, the flowability is not reduced. Absent.

[0014]

As is apparent from the above description, the infusion set of the present invention is provided with a ventilation hole provided with an air filter on the side wall of a connecting member for connecting the drip container and the infusion tube, and this ventilation hole is provided. And a gas passage opening at the distal end thereof is provided, so that good chemical liquid flowability can be maintained without being affected by the material and shape of the drip container.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of an infusion set of the present invention.

FIG. 2 is an enlarged vertical sectional view of a connecting member and a lock unit shown in FIG.

FIG. 3 is a perspective view (showing a state before use) of the drip container shown in FIG. 1;

FIG. 4 is an explanatory diagram of a conventional technique.

FIG. 5 is an explanatory diagram of a conventional technique.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Infusion container 11 Mouth part 111 Protrusion (engaging means) 12 Suspension means 13 Closure member 131 Fragile part 132 Tab 2 Connecting member 21 Front end part 22 Annular projection 23 Annular projection 24 Base end part 25 Chemical passage 26 Vent hole 27 Gas Passage 28 air filter 29 check valve 3 locking means 31 proximal end 32 female screw 4 drip tube 5 cap member 51 cap body 52 ring-shaped member

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Akira Aramata, Inventor 3-9-3 Honjo Nishi, Kita-ku, Osaka Inside Nissha Corporation

Claims (5)

[Claims] 1. A drip container having an inner wall formed to have a diameter which is tapered in a distal direction and having a mouth provided with an engagement means on an outer wall, and which can be fitted to the inner wall of the mouth. A tubular connecting member having a proximal end to which a tube is connected with a distal end, and an inner wall attached to the outside of the connecting member close to the distal end, and capable of being screwed with the engaging means on an inner wall. And a drip tube connected to the base end of the connecting member, wherein the connecting member has a vent wall provided with an air filter. A drip set, characterized in that a gas passage communicating with the air hole and opening at the tip is provided. 2. The drip set according to claim 1, wherein the locking means is rotatable with respect to the connecting member. 3. The drip set according to claim 2, wherein the locking means is slidable in the base member toward the connecting member by a predetermined distance. 4. The drip set according to claim 1, wherein a check valve is provided adjacent to the air filter. 5. The infusion set according to claim 1, wherein the air filter comprises a hydrophobic filter.