JPH10174716A - Drip infusion end alarming device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drip infusion end alarming device which senses the volume of medicinal liquid by a change in electrostatic capacity and makes alarm without using a liquid volume detector which allows the passage of the medicinal liquid. SOLUTION: Two sheets of metallic foil 5 are adhered opposite to the flanks of a medicinal liquid vessel 3 for drip fusion and a low-frequency oscillator which is changed in its oscillation frequency by the change in the electrostatic capacity between both sheets of the metallic foil is formed. This device has a signal transmitter 3 which transmits radio waves by applying an identification information signal corresponding to the medicinal liquid vessel 3 for drip infusion when the oscillation frequency of the low-frequency oscillator attains the set frequency determined in accordance with the change in both frequencies of the low-frequency oscillator when the medicinal liquid vessel 3 for drip infusion is in an empty state and when the vessel in a filled state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for notifying a nurse that a drip to a patient is about to be completed shortly before the drip to a patient is completed.

[0002]

2. Description of the Related Art Conventionally, in the case of infusion at a hospital, some devices have been proposed for notifying a nurse of the end of the infusion in order to perform an appropriate treatment after the infusion of the patient.

The drip state monitoring device disclosed in Japanese Utility Model Publication No. 5-32126 and Japanese Utility Model Application Laid-Open No. 5-95555 is a device for optically detecting a change in liquid level by a combination of a light emitting element and a light receiving element. is there.

The infusion state monitoring device disclosed in Japanese Utility Model Laid-Open Publication No. 8-10311 uses a capacitance type proximity switch as a detector for detecting the remaining amount of a chemical solution in a container. That is, it operates in response to a change in capacitance.

[0005]

However, in a conventional device for optically monitoring the state of infusion, the optical transmittance of a chemical solution is not so different from that of air. There is a risk of malfunction due to the small difference in the amount of light received by the liquid, and in the case of a drug such as blood having a higher viscosity than a drug such as a saline solution having a low viscosity, the drug may adhere to the inner surface of the container and malfunction. is there.

Further, in a device using a capacitance type proximity switch, although there is no possibility of the above-mentioned malfunction, the conventional device has a small change in capacitance, and it is easy to ensure accurate and reliable operation. Did not.

Accordingly, the applicant of the present application has filed a capacitance-type liquid-volume detecting device and a drip-end notification device as a drip-end notification device having a large capacitance change and high sensitivity (Japanese Patent Application No. 8-256268). ).

[0008] The liquid amount detecting device disclosed in Japanese Patent Application No. 8-256268 thins a part of the space between the wall surfaces, passes a chemical solution through a detection container in which a metal is attached to both wall surfaces of the device and opposes the electrostatic force based on the amount of the chemical solution. The detection is performed based on the change in capacitance, and the change in capacitance is large and the sensitivity is good. However, the structure of the liquid amount detection device requires a special liquid amount detection container and detects the chemical by passing the liquid amount detection container. Research and experiment on chemical changes to the environment must confirm safety.

SUMMARY OF THE INVENTION It is an object of the present applicant to provide an infusion end notification device that senses and notifies the amount of a chemical solution by a change in capacitance without using a liquid amount detection container through which the chemical solution passes.

[0010]

In order to achieve the above-mentioned object, a drip-completion notifying apparatus according to the present invention has a metal foil adhered to a side of a drip infusion solution container so that the metal foil is held between the two metal foils. A low-frequency oscillator whose oscillation frequency changes due to a change in electric capacity is formed, and is determined based on changes in both frequencies of the low-frequency oscillator when the infusion liquid container is empty and when the liquid is full. When the oscillation frequency of the low-frequency oscillator reaches the set frequency, the transmitter includes a transmitter that transmits an electric wave with an identification information signal corresponding to the liquid medicine container for infusion. This makes it possible to detect the amount of liquid by installing a detection unit directly on the infusion liquid container without using a special liquid amount detection container, and to increase the change in capacitance by increasing the area of the metal foil. it can. In addition, since the notification is performed based on the set frequency determined based on the empty state and the full state of the liquid medicine container for infusion, accuracy and reliability can be further improved. It is possible to more accurately notify which of the liquid medicine containers for infusion is about to end.

[0011] Further, the receiver is configured to receive a signal from the drip-end notifying device, and notify the identification information corresponding to the infusion liquid container together with an alarm from the signal. Thus, even when the nurse is at a remote place or forgets that the drip is being performed, it is possible to more reliably know that the drip is about to end.

[0012] Further, a metal foil is adhered to the side surface of the liquid medicine container for infusion to adhere thereto, and a low-frequency oscillator whose oscillation frequency is changed by a change in capacitance between the two metal foils is formed. When the oscillation frequency of the low-frequency oscillator reaches a set frequency determined based on a change in both frequencies of the low-frequency oscillator when the empty state and when the liquid medicine is full, the drip liquid medicine container A transmitter for transmitting a radio wave with a corresponding identification information signal is provided, and a relay receiver for receiving a signal from the transmitter is installed in an area where the transmitter exists, and a reception signal of the relay receiver is provided. Is provided with a transmitter that oscillates by adding an identification information signal of this area to the drip end notification device. Thereby, the metal foil can be adhered to the drip container without using a special liquid amount detection container, and the change in capacitance can be increased by detecting the liquid amount. In addition, since the set frequency is determined based on the empty state and the full state of the liquid medicine container for infusion, accuracy and reliability can be further improved, and the drip of the liquid medicine container for which drip in which room is almost completed. It can be more accurately notified of the presence.

Further, a receiver is provided which receives a signal from the drip-end notifying device, and notifies the identification information corresponding to the drip solution container and the identification information of the area together with an alarm from the signal. This allows nurses to determine which area (room, etc.)
Even if the nurse is in a remote place, it can be informed of which drip is about to end.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments and examples of the present invention will be described below with reference to the drawings.

FIG. 1 shows an example of the configuration of an infusion completion notification device according to the present invention.

Reference numeral 3 denotes an infusion liquid container for storing the liquid 4, reference numeral 5 denotes a metal foil adhered to the side of the infusion liquid container 3, and reference numeral 7 denotes a conventionally used infusion infusion set, and a roller for adjusting the amount of infusion. It comprises a clamp 8, an injection needle 9, and a vinyl hose 10. Reference numeral 11 denotes a hook and a table (Ilrigger) for holding the chemical solution 4. Reference numeral 13 denotes a small transmitter (to be described later) designed to carry out the present invention. When the oscillation frequency due to the capacitance of the metal foil 5 serving as a detection unit reaches a certain set value, the small transmitter is placed in the liquid container for infusion. A corresponding identification information signal, that is, an ID number signal is attached, modulated to a high frequency, and a radio signal radio wave is transmitted.

Reference numeral 15 denotes a relay receiver, and the small transmitter 13
Is installed on the ceiling or the like of an area (room or the like) where the wireless receiver is located, receives the radio signal radio wave, and sends the control apparatus 17 with an identification information (position ID number) signal of the area corresponding to the relay receiver. . The relay receivers 15 are installed corresponding to a plurality of liquid medicine containers 3 for infusion, which form a group such as the same room. The control device 17 stores information from a number of relay receivers 15, sends a signal to the pager transmitter 19 a few minutes before each chemical solution 4 ends, calls the pager 21, and corresponds to the relay receiver number. Identification information (position ID number)
And the identification information (ID number) corresponding to the liquid medicine container for drip near the end of the drip.

The transmission between the relay receiver 15 and the control device 17 may be performed by a wired system or a wireless system, but it is desirable to use a wireless system because installation work and the like can be simplified.

FIG. 2 is a diagram showing a metal foil serving as a sensor portion and a bonding state thereof. (A) is a side view of the metal foil 5 and the lead wire 14 to be bonded to each of the infusion liquid containers 3, and (B) is a diagram in which the metal foil 5 is attached to a bottle-shaped infusion liquid container 3 a. The figure shows a state and a state in which the metal foil 5 is attached to the bag-shaped drip solution container 3b. In recent years, in order to facilitate the treatment of empty bottles of drug solution, many drug solution containers for infusion of bags are used, but at present, they are still mixed with bottles. The metal foil 5 is preferably light and thin, and for example, an aluminum foil can be used. Also, the adhesive 6 and the backing sheet 8 are provided on the back surface of the metal foil 5 to form a seal, so that it is easy to handle. At the time of use, the metal foil 5 can be stuck to the side surface of the infusion liquid container 3 simply by peeling off the backing sheet 8. The adhesive 6 can be selected so that the metal foil 5 once adhered to the side surface of the infusion liquid container 3 can be peeled off, or the metal foil 5 can be disposable.

Each metal foil 5 is connected to a lead wire 14 for connecting to a small transmitter 13. Also, a lead wire 14 that connects the metal foil 5 to the small transmitter 13
The terminal 16 and the clip 18 can be provided in the middle to facilitate connection and disconnection of the lead wire 14.

FIG. 3 shows a block diagram of a small transmitter.

The low frequency oscillator 23 constitutes a circuit that oscillates by the capacitance of the metal foil 5 and a fixed inductance.

First, as shown in FIG. 2B, a metal foil 5 is adhered to an empty infusion liquid container 3 not containing the infusion liquid 4, and the lead wire 14 is connected thereto. The oscillation frequency of No. 3 is measured. The signal of the low frequency oscillator 23 oscillating in the liquid medicine container for infusion 3 enters the CPU device 27 via a filter (high-pass filter) 25 for removing an extra signal. Thereafter, the user operates the setting switch 29 provided on the CPU device 27, and stores the frequency at that time in the CPU device 27. Next, the metal foil 5 is adhered to the infusion solution container 3 containing the infusion solution 4 in the same manner as described above, the lead wire 14 is set, and the setting switch 29 is operated with the infusion solution 4 filled. The oscillation frequency at that time is
7 is stored. The CPU device 27 calculates the difference between the two frequencies. The set frequency is determined based on this difference. For example, the frequency at which the position reaches 90% of the difference is set as the set frequency. In other words, as shown in FIG. 5, when the infusion proceeds and the chemical solution 4 decreases, the oscillation frequency gradually increases. If the difference between X and Y is the difference between the set frequency for calling and the frequency when the container is full, Y / X is set to 0.90. When the frequency of the low-frequency oscillator 23 reaches the set frequency, the CPU device 27 sends an ID number to the high-frequency modulator 31.

Reference numeral 33 denotes a crystal oscillator for modulation, which is amplified by a high-frequency amplifier 35 and transmitted by an antenna 37. The small transmitter 13 is installed near the bed of each patient, and needs to be small. It is inconvenient to use a commercial power supply in installation, so it is desirable to use a battery. For this reason, it is desirable that the high-frequency amplifier 35 that consumes the most energy be intermittently operated by the CPU device 27 to reduce power consumption.

FIG. 4 shows a block diagram of a relay receiver when it is installed on the ceiling of a room where a drip is performed. Radio waves from the small transmitter 13 corresponding to the bed on which
The filter 4 is received by the antenna 39 of the relay receiver 15 and amplified by the high-frequency amplifier 41 to remove an extra frequency.
The signal enters demodulator 45 through 3. Reference numeral 47 denotes a local oscillator for the demodulator 45. The signal converted to the intermediate frequency by the demodulator 45 is amplified by the intermediate frequency amplifier 51, demodulated to a low frequency by the demodulator 53, and enters the CPU device 57.
Reference numeral 55 denotes a crystal oscillator for the demodulator 53. The CPU device 57 attaches the identification information (position ID number) of the region unique to the relay receiver 15 and sends it to the output terminal 63. The signal at the output terminal 63 is transmitted to the control device 17 and the pager transmitter 19.
Is transmitted through. Thus, the pager 21 carried by the nurse is caused to ring, and the number (ID number) corresponding to the relay receiver 15 and the number (position ID number) corresponding to the liquid medicine container 3 for infusion are displayed. It is possible to know which drip in which room is about to end anywhere.

The infusion end notification device of the above embodiment stores the change in capacitance between when the infusion liquid container is empty and when it is filled with the liquid medicine, and calculates the difference between the two to detect the end of infusion. Since the setting can be performed, the accuracy and reliability of the detection of the amount of the chemical solution can be improved, and the number of minutes before the end of the infusion can be easily set.

The drug solution in the present invention means all solutions used for infusion, such as saline, Ringer's solution, blood and the like.

[0028]

As described above, the infusion completion notification device of the present invention can accurately notify a nurse of which drip of a drip solution container is about to be completed to a nurse because of its high accuracy. Mistakes can be eliminated and the next process can be performed promptly. Therefore, there is no need for the nurse to constantly monitor the site of the infusion, and the patient can receive the infusion with confidence. Furthermore, the detection of the present invention can be carried out simply by sticking a metal foil to the outside of the drug solution container for infusion, which is simple and effective in preventing hospital-acquired infection.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram illustrating a configuration example of a drip termination notification device according to an embodiment of the present invention.

FIGS. 2A and 2B are external views showing a metal foil according to one embodiment of the present invention and a bonding state thereof, wherein FIG. 2A is a side view before use, and FIG. 2B is a perspective view at the time of use.

FIG. 3 is a block diagram of a small transmitter showing one embodiment of the present invention.

FIG. 4 is a block diagram of a relay receiver showing one embodiment of the present invention.

FIG. 5 is a conceptual diagram for explaining a method of determining a set frequency according to an embodiment of the present invention.

[Explanation of symbols]

1 Infusion end notification device, 3 infusion solution container, 4 infusion solution, 5 metal foil, 13 small transmitter, 14 lead wire, 15 relay receiver, 17 control device, 19 pager transmitter, 21 pager, 23 Low frequency oscillator, 25,43 filter, 27,57 CPU unit, 29,
61 setting switch, 31 high frequency modulator, 33, 55
Crystal oscillator, 35, 41 High frequency amplifier, 37, 39
Antenna, 45, 53 demodulator, 47 local oscillator, 5
1 Intermediate frequency amplifier, 63 output terminal.

Claims (4)

[Claims] 1. A low-frequency oscillator in which an oscillation frequency is changed by a change in capacitance between two metal foils, wherein a metal foil is adhered to a side surface of a liquid medicine container for infusion, and adhered. When the oscillation frequency of the low-frequency oscillator reaches a set frequency determined based on a change in both frequencies of the low-frequency oscillator when the empty state and when the liquid medicine is full, the liquid medicine container for infusion A drip end notification device provided with a transmitter for transmitting a radio wave with an identification information signal corresponding to the drip end. 2. A receiver that receives a signal from the infusion completion notification device according to claim 1, and notifies the identification information corresponding to the infusion liquid container together with an alarm from the signal. 3. A liquid medicine container for infusion, wherein a metal foil is adhered to a side surface of a liquid medicine container for infusion, and a low-frequency oscillator whose oscillation frequency is changed by a change in capacitance between the two metal foils is formed. When the oscillation frequency of the low-frequency oscillator reaches a set frequency determined based on a change in both frequencies of the low-frequency oscillator when the empty state and when the liquid medicine is full, the liquid medicine container for infusion A transmitter for transmitting a radio wave with an identification information signal corresponding to the transmitter is provided, and a relay receiver for receiving a signal from the transmitter is installed in an area where the transmitter exists. A drip end notification device, further comprising a transmitter that oscillates by further adding an identification information signal of the region to the signal. 4. A receiver which receives a signal from the infusion completion notification device according to claim 3, and notifies the identification information corresponding to the liquid medicine container for infusion and the identification information of the area together with an alarm from the signal.