JP2753966B2 - Automatic drip stop device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic drip infusion device for automatically stopping infusion when a drip solution or blood for transfusion is completed.

[0002]

2. Description of the Related Art A conventional infusion apparatus will be described with reference to the drawings. FIG. 1 is a perspective view illustrating a conventional infusion apparatus. In this drawing, reference numeral 1 denotes a drop of a drug solution connected by inserting an injection needle or the like into a mouth of a drug solution container (not shown) suspended upside down. A drip tube to be checked, 2 is an adjuster for adjusting the drop amount of the drug solution provided on the intermediate tube 3 continuous from the drip tube 1, and 4 is a tip tube 6 provided with a syringe needle 5 at the tip and the intermediate tube 3. This is a coupler. In addition, injection needle 5
Is inserted into a blood vessel such as a patient's arm.

In such a conventional infusion device, the controller 2
By moving the gear while rotating it,
By compressing the intermediate tube 3 to deform the diameter of the tube through which the drug solution passes, the speed at which water droplets are formed in the drip tube 1 is adjusted. Then, when the drug solution in the container runs out and the drug solution does not drip into the drip tube 1, the knob of the coupler 4 is turned to shut off the channel of the drug solution and terminate the drip.

[0004]

Since the conventional infusion apparatus is configured as described above, if the liquid medicine comes to the end, the liquid level will be high if the nurse does not perform the processing until the infusion is completed. (Interface between the space and the drug solution) a passes from the drip tube 1 through the intermediate tube 3, passes through the connector 4, reaches the injection needle 5 inserted into the patient's arm, and is inserted into the blood vessel into which the injection needle 5 is inserted. There is a problem that there is a danger of air entering into the vehicle.

[0005] Further, even when the liquid medicine in the container is exhausted and the drip is completed, the tip tube 6 provided with the injection needle 5 in the infusion apparatus is so arranged that the liquid medicine level does not reach the injection needle 5.
(Japanese Patent Application Laid-Open No. Hei 4-20351) has been proposed for automatically closing an infusion apparatus in which the shape of the infusion is held in an inverted S-shape on a vertical plane.
0 minutes, it may take 3 to 4 hours or half a day depending on the amount, during this time the patient is not necessarily lying in bed, and some patients can freely act depending on their symptoms and disease types, It is very difficult for such a patient to maintain the shape of the distal end tube 6 provided with the injection needle 5 in an inverted S-shape on a vertical plane for a long time. If the inverted S-shape is to be held in a state where a certain degree of freedom is allowed, there is a problem that the infusion apparatus must be very heavy equipment.

Accordingly, it is an object of the present invention to provide a new technical means capable of automatically stopping infusion without reaching the patient's liquid surface even if there is no liquid in the container.

[0007]

The above technical objects can be achieved by the present invention as described below. That is, the automatic drip stop device according to the present invention is composed of two vertically long chambers 7a and 7b communicating with a lower part capable of retaining a dripping liquid, and a dripping liquid is dropped on an upper part of one chamber 7a. A mouth 9 is provided and the drop
An outlet 10 for the dripping liquid is provided on the upper side surface of the other chamber 7b near the height of the port 9 and stays in the other chamber 7b.
From the liquid level of the dropped liquid thus dropped to the liquid level a of the one chamber 7a.
And the amount of liquid dropped in the other chamber 7b during
The liquid amount of the dripping liquid remaining until the shooting needle 5 became the same amount.
The drip stops at that point .

[0008] The present invention also relates to an automatic drip stop device.
In this case, the tip of the outlet 10 is connected to the bottom of the other chamber 7b.
Outflow conduit 11 positioned below
is there.

[0009]

[0010]

According to the present invention, a vertically elongated chamber for retaining the dripping liquid is placed between a container containing a drip solution for drip infusion or blood for transfusion and a syringe needle inserted into a blood vessel of a patient. Since the automatic drip infusion device is provided so that the longitudinal direction of the chamber is vertical, the drip liquid flows in from the inflow port provided in the lower part, and the drip liquid flows out from the outflow port provided in the upper part. When the dripping liquid in the container disappears and the dripping liquid does not drip into the vertically elongated chamber, the dripping liquid which has dropped due to the head drop from the container to the injection needle is set at the outlet of the automatic drip stop device as a fulcrum. The flow stops when the amount of the dripping liquid remaining between the time and the injection needle becomes equal to the remaining amount of the dripping liquid lifted to the outlet of the automatic infusion drip stop device, Drops of the same amount as the amount of liquid left in the room of the automatic drip stop device Liquid is, and thus remain in the tube to the injection needle inserted into the patient.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. Embodiment 1 FIG. FIG. 2 is a longitudinal sectional view showing an automatic infusion stop device according to the present invention,
FIG. 3 is a sectional view taken along the line AA in FIG. 2, and FIGS. 4, 5 and 6 are longitudinal sectional views illustrating an automatic drip infusion apparatus according to the present invention. In these figures, the same reference numerals as those in FIG. 1 denote the same or corresponding parts, and reference numeral 7 denotes a column-shaped automatic drip stop device, which is an inflow chamber 7a and an outflow chamber which are two vertically long chambers capable of retaining a drip liquid. 8 is a partition wall, and the two chambers 7a and 7b communicate with each other at the lower part. A drop 9 for a chemical is provided at the upper part of the inflow chamber 7a.
An outlet 10 for the dripping liquid is provided on the upper side surface of the outlet chamber 7b, and the outlet 10 is connected to an outlet conduit 11 whose tip is located below the bottom surface of the chamber 7b. The automatic drip stop device 7 in this embodiment is to be mounted at the position of the drip tube 1 instead of the drip tube 1 shown in FIG. 1, and the drip port 9 is connected to a drip container via a conduit or the like (tube). The tip of the outflow conduit 11 is connected to the intermediate tube 3.

Next, the method of use will be described. First,
The injection needle of the tube with the injection needle attached to one is inserted into the mouth of the container, and the drip port 9 of the automatic drip stop device 7 is connected to the other. Subsequently, one end of the intermediate tube 3 to which the controller 2 is attached is connected to the outflow conduit 11, and the other end is connected to the connector 4 of the distal tube 6. Thereafter, the automatic infusion stop device 7 is filled with the dripping liquid so that the automatic infusion stop device 7 is turned sideways so that the air chamber remains in the inflow chamber 7a. At this time, the inside of the intermediate tube 3 and the tip tube 6 is filled with the dripping liquid. Finally, when the automatic drip stop device 7 is released, as shown in FIG. 2, the automatic drip stop device 7 is hung so that the longitudinal directions of the two vertically long chambers 7a and 7b are oriented vertically.
Infusion starts.

When the chemical liquid (drop liquid) in the container is exhausted, the drop liquid level a of the inflow chamber 7a drops, but as shown by the dashed line in FIG. at a position where the dropping liquid volume and the outlet 10 of the outlet chamber 7b and the liquid amount of the remaining dropping solution until the needle 5 is the same amount that is until dropping liquid level a, the inflow chamber 7a Of the dropping liquid level a stops.

As shown in FIG. 5, when the drip is started with the air chamber formed above the outflow chamber 7b, or when the chemical liquid in the container runs out, the liquid level a of the inflow chamber 7a drops. Then, even when the air in the inflow chamber 7a is sent into the outflow chamber 7b, as shown by the dashed line in FIG. 6, from the outflow port 10 of the outflow chamber 7b to the dropping liquid level a in the inflow chamber 7a. dropping solution of outflow chamber 7b located between the outlet 10 until the liquid volume and the same amount of the remaining dropping solution until the needle 5, dropping liquid outflow chamber 7b the outflow port 10 Stop flowing out of.

As described above, when the amount of the dropping liquid indicated by the one-dot chain line in the outflow chamber 7b becomes equal to the amount of the dropping liquid remaining in the distal end tube 6 , the dropping of the dropping liquid is stopped. Automatically terminates. In this embodiment,
Since the inflow chamber 7a functions as the drip tube 1, the conventional drip tube 1 becomes unnecessary.

The outflow conduit 11 may be formed integrally with the outflow port 10. Further, the inflow chamber 7a and the outflow chamber 7b are partitioned by a partition wall 8 and communicate with each other at a lower part.

[0017]

[0018]

[0019]

[0020]

[0021]

[0022]

[0023]

[0024]

[0025]

[0026]

[0027]

According to the present invention, the descent of the finished drip can be reliably stopped by utilizing the weight balance. Thus, at the end of the drip or blood transfusion, even if a nurse or doctor is not at the side, it is possible to prevent air from entering and backflow of blood. In addition, the automatic infusion stop device of the present invention has a simple structure, so that it can be manufactured in large quantities by plastic molding, and the manufacturing cost can be reduced. By making it transparent, the feeling of cleanliness is increased and the state of the dripping liquid can be easily seen. Therefore, it can be said that the industrial applicability of the present invention is very high.

[Brief description of the drawings]

FIG. 1 is a perspective view illustrating a conventional infusion device.

FIG. 2 is a longitudinal sectional view showing an automatic drip stop device according to the present invention.

FIG. 3 is a cross-sectional view taken along line AA of the automatic drip stop device shown in FIG. 2;

FIG. 4 is a longitudinal sectional view illustrating an automatic drip stop device according to the present invention.

FIG. 5 is a longitudinal sectional view for explaining an automatic drip stop device according to the present invention.

FIG. 6 is a longitudinal sectional view illustrating an automatic drip stop device according to the present invention.

FIG. 7 is a cross-sectional view of the automatic drip stop device according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Infusion tube 2 Adjuster 3 Intermediate tube 4 Connector 5 Injection needle 6 Tip tube 7 Automatic drip stop device 7a Inflow chamber 7b Outflow chamber 8 Partition wall 9 Drip port 10 Outlet 11 Outflow conduit

Claims (2)

(57) [Claims] 1. A lower part capable of retaining a dripping liquid is composed of two vertically long chambers 7a and 7b communicating with each other.
A dropping port 9 for dropping liquid is provided at the upper part of the
Outflow port 10 of the dropping solution are found provided on the upper side surface of the height near the other chamber 7b, droplets retained in the other chamber 7b
Between the liquid level of the lower liquid and the liquid level a of the one chamber 7a
The amount of liquid dropped in the other chamber 7b and the outlet 10 through the injection needle 5
When the volume of the dropping liquid remaining until
An automatic drip infusion device, wherein the infusion is stopped. 2. The outlet 10 has a tip at the bottom of the other chamber 7b.
That the outflow conduit 11 positioned below the surface is continuous
The automatic drip infusion device according to claim 1.