JPS60188171A - Monitor apparatus in drug injection - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a monitoring device for medical liquid injection, and more specifically, to a monitoring device that accurately detects and notifies when 2L of a desired medical liquid is present or when the injection is completed. .

In medical treatment, it is sometimes desirable to administer intravenous injections to patients for purposes such as hydration, nutritional support, adjustment of electrolyte balance in the body, and hydration, and in recent years, there has been considerable interest and many medicinal solutions have been used. . Even when replenishing fluids or nutrients parenterally, the amount of fluid needed per day for adults is said to be approximately 2 liters, and depending on the symptoms, such large amounts of liquid medicine may be administered continuously for quite a long time. It may also be used. In addition, since the infusion rate of the drug solution introduced into the patient was influenced by different conditions such as the patient's weight, age, nature, symptoms, and properties of the injected solution, it was necessary to adjust the injection rate and It is necessary to be measurable to ensure that the patient receives an optimal effect from the drug solution.

Furthermore, in the introduction of the drug solution, it has traditionally been administered by injecting it into the patient by gravity flow from a container containing the drug solution to be supplied, but in this case, even when the amount of drug solution is at least 500 cc, it is approximately It takes 5 hours, and although the nurse begins the work of setting up and adjusting the drug container, the subsequent information on the patient's injection status and its completion is often left to the attentiveness and monitoring ability of the attendant. It is being

For example, if you are monitoring intravenous administration especially late at night, or if you are dealing with a critically ill patient in an emergency situation, you will have to make a difference between day and night. The attendants are very tired and the work is extremely hard.On the other hand, even if the family members and close relatives are working in an unfamiliar environment, they are exhausted from caring for them and cannot even take a nap (ω
The reality is that the situation has reached its peak.

In this way, if it becomes necessary to inject a drug solution such as an intravenous drip, the intravenous supply to the patient! There is a need for an apparatus that can automatically detect the injection status of liquid No. 11, especially when the injection is completed, and confirm that the injection has been performed accurately.

Even with my knowledge, it may be unlikely that I, my family, or a close relative will unfortunately encounter such a situation, but it is important that an attendant or other person constantly monitors the situation for a long time. There is a strong desire for a means of injecting liquid that can relieve the user from tedious work and at least allow him to take a nap.

For this reason, devices and methods for measuring liquids for intravenous injection, such as those disclosed in Japanese Patent Application Laid-Open No. 57-156771, which convey a precise amount of fluid, or those disclosed in Japanese Patent Application Laid-Open No. 57-8'1354, which contain electromagnetic radiation. Methods and apparatuses for exploring injected liquid using the method have been proposed.

However, even if the former is an accurate δ1 amount device for intravenous injections, for example, since the drugs administered to patients vary, it requires complicated operations such as replacing and adjusting the drug solution, and it is difficult to introduce the drug solution. Due to problems such as contamination of the injection channel, costs are also required for materials, and even when using optical transmission means such as the latter that uses electromagnetic radiation to probe the contents in the injection channel, it is difficult to maintain the specified state of the injection tube. Depending on the arrangement, etc., there is a drawback that the accuracy of the detection signal becomes unstable.

In view of these circumstances, the inventors of the present invention have conducted extensive research into methods that can continuously, accurately, and easily control the amount of medicinal solution injected into a patient's vein, and in particular can detect the completion of the injection and generate a control signal. As a result, they focused on the fact that the flow rate of a drug solution injected into a patient can be detected by measuring the amount of air inhaled into a drug solution injection container, and found that the above object can be achieved, leading to the completion of the present invention.

The present invention is a monitoring device F for medical liquid injection, comprising:
It is connected to the outer side of the inhalation needle attached to the drug solution container, and provides a means for undetectably changing the flow rate of the drug solution by balancing the amount of air inhaled into the container with the atmospheric pressure, and generates a detection signal. This invention relates to a monitoring device for liquid drug injection, characterized in that it is configured as follows. It is therefore an object of the present invention to provide a drug/infusion monitoring device with reliable and practical monitoring capabilities.

Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.

The drawings show one embodiment of the present invention, and FIG. 1 is an explanatory diagram of a monitoring device for drug injection according to the present invention, and FIG. 2 is a block diagram of the device according to the present invention.

In FIG. 1, 1 is a chemical liquid injection container, and 2 is an equipment section consisting of a detection section 4 and a control section 5. The chemical liquid injection container 1 is filled with a chemical liquid 3 to be supplied, and the chemical liquid is 3 passes through the injection path 6 and is injected into the patient from the injection needle portion 7.

Since the drug solution 3 is administered to the patient by the flow of gravity, the injection container 1 is usually suspended in a hanging state at a position higher than the patient. In addition to the injection path 6 for injecting the drug solution 3 into the patient, the injection container 1 is equipped with an inhalation needle 8 penetrating it to equalize the pressure between the inside of the injection container 1 and the outside air.

The device section 2 is connected to the above-mentioned inhalation needle 8 through an air supply passage 9, and an on-off solenoid valve 10 is installed in the middle of the passage 9, and is kept in a perfectly open state when injecting a drug solution. However, when the desired amount of liquid medicine is injected or the injection is completed, it is in a closed state and is configured to notify a signal that the injection of liquid medicine has been completed. Further, a U-shaped water tank 11 whose lower part is in a conductive state is disposed in the detection unit 4, and an intake opening 12 for inhaling the atmosphere is provided at one upper part of the water tank. When the electromagnetic valve 10 is set in the closed state, both the Y part and the Z part in the water tank are in equilibrium with the atmospheric pressure, and the water level thereof remains the same. In addition, the above water tank 1
A level sensor 13 is attached inside the tank 1 to detect the immersion state and to detect the liquid level and notify the state.

The present invention has the above-mentioned general configuration. First, a liquid container 1 containing a medicinal solution 3 to be supplied to a patient is suspended at a position higher than the patient, and an injection container 1 and an equipment part 2 are connected to an inhalation needle. 8 to form an integrated device, first,
By switching the opening/closing solenoid valve IO to the open state, the medicinal solution drips from the injection needle 7 and begins to be injected into the patient. Along with this, the liquid level in the liquid container 1 decreases to Lxo -4Lx+, the pressure in the X part in the container decreases, and the air in the Y part is sucked into the liquid in the liquid container, so the Y part The air becomes negative, and conversely, the liquid level in the Y part rises to ■, yo-L, y+, and the water level in the 7 part, which is in contact with this at the bottom of the tank, falls to L zo- = L z+. However, circulation is performed to maintain a state of equilibrium with atmospheric pressure.

When the liquid level in section 7 reaches the level sensor, the system detects the completion of the chemical liquid injection and notifies a chemical liquid injection completion signal.

FIG. 2 is a block diagram of the device according to the invention, illustrating the above-described cyclic operation pattern.

The part surrounded by dotted lines is a block diagram of the equipment section 2.

(a) Starting from drug injection setting, (b) Dropping of drug solution, (C) Decrease of air pressure inside drug container, (d) Opening/closing solenoid valve (normally open), (e) Inhalation of Y part air into drug solution in drug solution container. of(
In the repeating patterns b) to (e), the air pressures in the X section and the Y section are kept in balance with each other. In parts Y and 7 of the water tank, following (e) above, (f) decrease in air pressure in part Y, (g) rise in water level in part y, (h
) In the Z part water level lowering and the repeating pattern of (f) to (h), the balance with the atmospheric pressure is similarly maintained. Furthermore, (i) is the liquid level detection (L
z'o-Lz+interval M), (j) is the drug injection completion signal,
(k) shows a liquid medicine injection completion display and LED lighting 14.

As described above, the embodiments according to the present invention have been described, but the present invention is configured such that the flow rate of the drug solution discharged from the injection container can be indirectly detected by the amount of air injected into the container, and It has a rib at the point that causes the target 1 to generate a detection signal indicating the completion of drug injection. In order to achieve the above object in the present invention, a U-shaped water tank is used, and changes in the flow rate of the drug solution in the injection container are indirectly detected by the amount of air inhaled. Unlike other devices that use a container to measure liquids, it does not allow the chemical liquid to pass through it directly, does not require complicated chemical replacement or adjustment work, and does not cause the problem of contamination of the chemical liquid due to the substance of the container. Furthermore, even if the container is tilted during liquid injection and the level of the stored medicinal solution is disturbed, the measured value will not be affected because the air volume within the liquid container remains unchanged.

The present invention is not limited solely to the above-mentioned embodiments or by the description of the embodiments, and various changes and improvements may be made based on the knowledge of those skilled in the art without departing from the spirit of the present invention. ■It's something you can do.

As described above, the present invention is designed to accurately and easily control and notify the completion status of drug solution injection into a patient, without using a complicated device, and without using a pump injection system. It is ideal for injecting an infusion into a patient, for example, without causing problems such as contamination of drug fluids due to materials as shown in the figure.In that case, the conventionally known infusion operation technique is effective without any modification, and the conventionally known liquid infusion container can be used. It is integrated into an extremely simple mechanism that connects to the system, providing an efficient, easy-to-use, and practical device.

[Brief explanation of drawings]

The drawings show embodiments of the present invention, and FIG. 1 is an explanatory diagram of a monitoring device for liquid injection according to the present invention, and FIG.
The figure shows a block diagram of the device.

Claims (1)

[Scope of Claims] ■) A monitoring device for medical liquid injection, which is connected to the outer opening of an inhalation needle attached to a liquid medicine container, and is connected to the outer opening of an inhalation needle attached to a liquid medicine container, and monitors the balance between the amount of air inhaled into the container and atmospheric pressure. 1. A monitoring device for chemical liquid injection, characterized in that it is configured to detect a change in the flow rate of a chemical liquid and to generate a detection signal. 2) The monitoring device according to claim 1, characterized in that a U-shaped water tank is used as a means for detecting changes in the flow rate of the chemical solution to detect movement of the liquid level in the chemical solution container.