JPH077968Y2 - Automatic opening and closing infusion set - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION The present invention provides a base (7) fixed in a liquid storage chamber (2), and an opening / closing control plug in a through hole (71) provided in the base (7) which is an outlet for infusion. The present invention relates to an infusion set in which (6) is fitted and the opening / closing control plug (6) is lifted by the buoyancy of the infusion and the opening / closing control plug (6) is lowered by the attraction of the infusion and gravity to automatically open and close.

[0002]

2. Description of the Related Art It is a well-known fact that in the field of medical treatment, drugs are infused by infusion and nutrients are often supplied. However, infusions usually take a long time, sometimes over hours or even days. For this reason, patients and nurses have neglected their attention, and sometimes they do not notice even if the liquid in the infusion bottle runs out. Especially for infusions at night, both the sick person and the caregiver fall asleep, the liquid in the infusion bottle and tube is exhausted, the blood flows back into the tube, the blood clots, and the venous needle is clogged. It was necessary to insert a new venous needle into the blood vessel again.

For this reason, many automatic opening / closing type infusion sets have been devised in the past, which generally use the relationship between buoyancy and the water level of the infusion to administer and stop the infusion. For example, what is shown in FIG. 1 is an infusion set of an automatic opening / closing type that uses a single thin-plate valve (A). In addition to this, an automatic opening / closing type infusion set using a spherical, tubular, or plate-like float as an opening / closing control plug has been devised.

[0004]

[Problems to be Solved by the Invention] In the above-mentioned automatic opening / closing type infusion set using the single valve (A), the valve (A) approaches the water outlet (B) when the sick person moves and the infusion shakes. ,
Due to the principle of siphoning, even if infusion remains in the infusion bottle, the phenomenon of opening and closing occurs and stable infusion cannot be performed. Moreover, the structure was complicated and not practical. In addition to this, a spherical, tubular, or plate-shaped float used as the opening / closing control plug has the same drawbacks.

[0005]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides an infusion set having an opening / closing control portion including a base (7) and an opening / closing control plug (6). The open / close control plug (6) has a configuration in which a hemispherical upper hemisphere (61) and a lower hemisphere (62) are connected by a cylindrical connecting portion (63), and the open / close control plug (6) has a connecting portion (63). ) Is inserted into the through hole (71) provided in the center of the base (7) so that the upper hemisphere (61) is located above the base (7). Upper and lower hemispheres (6
1) Since the upper and lower movement range of (62) is limited, the opening / closing control plug (6) maintains a stable state even when the infusion is shaken. When the infusion liquid above the base (7) of the liquid storage chamber (2) is exhausted, the upper hemisphere (61) automatically closes the through hole (71) of the base (7) by the gravity and attractive force of the infusion liquid.

[0006]

[Function] When there is an infusion liquid above the base (7) in the liquid storage chamber (2), the opening / closing control plug (6) is lifted by the hemisphere due to buoyancy, and the infusion liquid is the upper hemisphere (61) and the upper surface of the base (7). Through the vertical groove (64) of the connecting portion (63), the groove (65) of the lower hemisphere (62), and flows into the tube (3) under the base (7). When the infusion solution disappears above the base (7), the upper hemisphere base (7) descends due to the attractive force and gravity of the infusion solution, and the bottom surface of the upper hemisphere (61) passes through the through hole (71) of the base (7). Seal tightly. As mentioned above, automatic opening and closing control with a simple structure and high sealing performance can be performed.

[0007]

Embodiments will be described with reference to the drawings. First, FIG. 2 is a perspective view of an infusion set of the present invention, and FIG. 3 is a front view in which the infusion set of the present invention is partially sectioned. The infusion set of the present invention mainly comprises an infusion bottle (1), a liquid storage chamber (2), a tube (3), a flow rate controller (4), a venous needle (5) and the like. Infusion bottle (1)
Supplies the infusion liquid to the liquid storage chamber (2), and the infusion liquid is stored in the liquid storage chamber (2).
It reaches the tube (3) through the water outlet at the lower end, and the flow rate is controlled by the flow rate controller (4) to inject it into the vein from the vein needle (5).

The main feature of the present invention is to connect a liquid storage chamber (2) having a base (7) fixed directly below the inner wall by molding directly at the manufacturing stage to the upper end of the tube (3), A cylindrical through hole (71) is formed at the center of 7), and the infusion solution dripped from the infusion solution bottle (1) into the solution storage chamber (2) reaches the tube (3) through this through hole (71). It is the only outlet. The upper surface of the base (7) may be slightly conical, and the edge of the through hole (71) may be raised and the outer edge thereof may be lowered.

An opening / closing control plug (6) is fitted on the base (7). The opening / closing control plug (6) is made of an emulsion material by a foaming method. The upper hemisphere (61) and the lower hemisphere ( 62) and the connecting portion (63), and as shown in FIG. 4, the opening / closing control plug (6) is integrally molded. The volume of the upper hemisphere (61) is larger than that of the lower hemisphere (62), the upper surface is made spherical and the bottom surface is joined to the connecting portion (63), and further the flat surface is made to the lower hemisphere (62). There is. The connecting part (63) has a cylindrical shape and is provided between the upper hemisphere (61) and the lower hemisphere (62), and its diameter is smaller than the inner diameter of the through hole (71) of the base (7) and is vertically You can move. Further, the height of the connecting portion (63) is larger than the height of the through hole (71), so that the connecting portion (63) can move up and down after being fitted to the base (7).

On the side surface of the connecting portion (63), the connecting portion (6
3) A vertical groove (64) having a length equal to the height of 3) is provided, and the vertical groove (64), the upper hemisphere (61), the bottom surface and the lower hemisphere (6).
2) It is perpendicular to the upper surface and has an I shape. Further, the lower hemisphere (62) has a groove (65) which is in communication with the vertical groove (63).
To provide. The groove (65) penetrates the upper surface of the lower hemisphere (62). Connection part (6) of the open / close control plug (6)
3) partially moves up and down in the through hole (71) of the base (7).

When there is an infusion liquid in the liquid storage chamber (2), the opening / closing control plug (6) is lifted by the buoyancy of the oil liquid, and the upper surface of the lower hemisphere (62) is below the base (7). Because of this, it restricts the opening / closing control plug (6) from further rising, and maintains the stereotaxic state of the transfusion. At this time, the infusion solution dripped from the infusion solution bottle (1) into the storage chamber (2) is connected to the opening / closing control plug (6) through the gap between the bottom surface of the upper hemisphere (61) and the top surface of the base (7). It flows out to the lower part of the base (7) through the vertical groove (64) of (63) and further the groove (65), and flows out to the tube (3) from the water outlet at the lower end of the liquid storage chamber (2). When there is no infusion above the base (7) and the infusion is only below the base (7), the lower hemisphere (62) is smaller in volume and weight than the upper hemisphere (61) and above the base (7). The volume and weight of the tube is larger than the volume and weight below the base (7), and the tube (3)
The upper hemisphere (61) drops onto the base (7) due to the attractive force of the infusion solution remaining inside and the suction principle. At this time, the light sliding surface which is the bottom surface of the upper hemisphere (61) completely seals the through hole (71) of the base (7). The infusion set with automatic opening and closing is completed as described above.

When the infusion bottle is replaced and the infusion is continued, the opening / closing control plug (6) is set at the base (7) by the buoyancy of the infusion newly dropped from the infusion bottle (1) into the liquid storage chamber (2). ) Floating upwards, upper hemisphere (6
A gap is formed between 1) and the upper surface of the base (7), the through hole (71) of the base (7) opens the passage of the infusion, and the infusion is allowed to flow out, and the infusion further goes to the tube (3). Spilled,
Infusion can be resumed.

[0013]

According to the present invention, it is possible to provide an automatic opening / closing infusion set having a simple structure and a high degree of sealing. That is, according to the present invention, it is possible to prevent the situation where blood flows backward and clogs the venous needle when the infusion liquid in the infusion bottle is exhausted, and the venous needle must be struck again into the blood vessel when continuing the infusion.

[Brief description of drawings]

FIG. 1 is a partial sectional view of a conventional automatic opening / closing type infusion set.

FIG. 2 is a perspective view of an embodiment of the present invention.

FIG. 3 is a front view of an embodiment of the present invention, which is a partial cross-sectional view.

FIG. 4 is a perspective view of an opening / closing control plug according to an embodiment of the present invention.

[Explanation of symbols]

(1) Infusion bottle (2) Liquid storage chamber (3) Tube (4) Flow rate regulator (5) Vein needle (6) Open / close control plug (61) Upper hemisphere (62) Lower hemisphere
(63) Connecting part (64) Vertical groove (65) Groove (7) Base (71) Through hole

Claims (1)

[Scope of utility model registration request] 1. An infusion bottle (1), a liquid storage chamber (2),
Tube (3), flow regulator (4) and venous needle (5)
A base (7) fixed below the inside of the liquid storage chamber (2) provided at the upper end of the tube (3), and a through hole (71) is provided at the center of the base (7). (B) A connecting portion (63) in which a hemispherical upper hemisphere (61) and a lower hemisphere (62) are cylindrical and have an inner diameter smaller than the inner diameter of the through hole (71) and a length longer than that of the through hole (71). Connect with
One vertical groove (64) is formed on the side surface of the connecting portion (63).
Further, a groove (65) communicating with the vertical groove (64) is provided on the plane which is the upper end surface of the lower hemisphere (62). (C) The opening / closing control plug (6) is inserted into the through hole (71) so that the upper hemisphere (61) is above the base (7) and the lower hemisphere (62) is below the base (7). Connection part (6
3) Fit. An automatic opening and closing type infusion set having the above configuration.