JPH0898884A - Drip management device - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a device for appropriately controlling a medical drip device by quantitatively measuring and displaying the amount of drug solution, unit flow rate, etc. in the drip bottle. [Structure] At the lower end of the drip bottle 1, a sensor 7 that emits ultrasonic waves into the liquid medicine A in the drip bottle 1 and receives the ultrasonic waves reflected by the liquid level L is attached, and the sensor 7 obtains the output signal from the sensor 7. Based on the time from the oscillation of the generated ultrasonic wave to the reception of the ultrasonic wave, the arithmetic control unit 11 quantitatively measures the amount of the liquid medicine in the drip bottle 1, the unit flow rate, etc., and establishes it in the nurse room or in the nurse center away from the patient room. Display and alarm devices installed 12, 13
The progress status of the drip treatment is displayed, and the fact that the drip of the required amount of the liquid medicine has been completed is notified.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drip device for medical use, and more particularly to detecting and displaying the amount of drug solution in a drip bottle and its unit flow rate so that drip treatment can be appropriately performed. The present invention relates to a drip management device.

[0002]

2. Description of the Related Art A medical drip device is constructed, for example, as shown in FIG.

A drip bottle (01) containing a liquid medicine is a stand (0
It is suspended by the hanger (04) on the arm (03) of 2).

A flexible tube (06) such as a rubber tube is connected to the lower end of the drip bottle (01) via a connector (05), and an injection needle (07) is attached to the tip of the flexible tube (06). Is installed.

A drip chamber (08) is inserted in the middle of the flexible tube (06). Drip chamber (08)
Is a tube made of a transparent material such as glass and has a downward nozzle inside so that the dropping state of the passing chemical solution can be visually confirmed.

The connector (05) is provided with an adjusting cock (not shown) for adjusting the unit flow rate of the drug solution flowing down from the drip bottle (01).

At the time of use, the injection needle (07) is pierced into the vein of the patient, the adjusting cock is opened, the drug solution in the drip bottle (01) is allowed to flow down, and it is passed through the flexible tube (06) and the injection needle (07). Inject the drug solution into the patient's vein.

The doctor or nurse (hereinafter referred to as "procedure") who performs the treatment adjusts the opening degree of the adjusting cock while visually observing the time interval of the chemical liquid dropped from the nozzle (09) of the drip chamber (08). And set the required unit flow rate.

[0009]

As described above, in the conventional drip device, the unit flow rate of the chemical solution is set to the required value based on the dropping state of the chemical solution in the drip chamber (08). A considerable amount of experience is required to perform this properly, and even an experienced operator has variations in the set flow rate due to individual differences.

Further, since the amount of drug solution to be injected is determined by the set flow rate and the drip time, the operator estimates the approximate required time, and when the time has elapsed from the start of drip, the drip I'm trying to finish.

However, in a hospital or the like, it is rare that the operator is in charge of only one patient. Therefore, when other work is busy, the patient who is instilling is left alone and the infusion amount exceeds. In an extreme case, the drip bottle may be left unattended after it has been emptied, causing unnecessary pain to the patient.

In order to solve these disadvantages, the present invention can accurately detect and display information such as a unit flow rate of a liquid medicine, the amount of the liquid medicine that has been drip, and the completion of a predetermined drip amount. The purpose of the present invention is to provide a drip management device.

[0013]

[Means for Solving the Problems] The present invention for achieving the above object is configured as follows.

(1) An ultrasonic oscillating element which is attached to the lower end of the drip bottle and which emits an ultrasonic signal toward the liquid surface of the drug solution in the drip bottle, and an ultrasonic signal reflected from the liquid surface to receive electricity. A sensor equipped with a receiving element that outputs a signal, an arithmetic and control unit that detects the state of the liquid medicine in the drip bottle based on the electrical signal from the sensor, calculates and outputs a drip management data signal, and a drip management data signal And a display device for displaying the state of the drip treatment based on the above.

(2) In the item (1), the ultrasonic signal is an ultrasonic pulse signal.

(3) In the above item (1) or (2), the sensor is embedded in the sensor housing chamber formed in the lower end region of the drip bottle.

(4) In the above item (1) or (2), the sensor is attached to the lower end of the drip bottle by abutting against the lower surface of the flat portion formed parallel to the liquid surface.

(5) In any one of the above items (1) to (4), the sensor is an outer packaging material surrounding the ultrasonic wave transmitting element and the ultrasonic wave receiving element, and a material forming a drip bottle,
Sound impedance should be equal.

(6) In any one of the above items (1) to (5), the drip management data signal is the amount of the liquid medicine in the drip bottle, which is obtained based on the time interval between the oscillation and the reception of the ultrasonic pulse signal. It contains a signal that indicates.

(7) In any one of the above items (1) to (5), the drip management data signal is a drug solution obtained based on a difference in time interval between oscillation and reception of a plurality of ultrasonic pulse signals. It includes a signal indicating the unit flow rate of.

(8) In any one of the above items (1) to (5), the drip management data signal is required based on the amount of decrease from the liquid surface at the start of drip or based on the unit flow rate of the chemical liquid. It includes a signal that calculates the time required for the infusion of the amount and, based on the elapsed time, illuminates the end indicator lamp of the display device and activates the warning buzzer.

(9) In any one of the above items (1) to (8), the display device is provided in a patient room and a separate room separated from the patient room.
Multiple sets are installed in parallel.

[0023]

The time required for the ultrasonic pulse signal radiated from the oscillation element of the sensor into the drug solution in the drip bottle to reach the receiving element after being reflected by the liquid surface is the distance between the sensor and the liquid surface, that is, the drip. Since it changes in proportion to the amount of drug solution in the bottle, the amount of drug solution in the drip bottle is obtained based on the measured value of this time, and based on the difference between the measured values of multiple ultrasonic pulse signals, the drug solution Calculate the unit flow rate of.

It is detected that the required amount of infusion has been completed based on the decrease amount of the liquid medicine or the elapse of the infusion time based on the unit flow rate, and the lamp of the display device, the buzzer, etc.
The operator is notified of the end of the drip.

[0025]

1 is a cross-sectional view of an infusion bottle of an embodiment applied to an infusion control device of the present invention, and a diagram showing a schematic configuration of a related control device.

The transparent synthetic resin drip bottle (1) contains the drug solution (A) for drip inside and the delivery port of the drug solution (A) at the lower end.
It is equipped with (2) and is held by a hanger (3) for suspension.

A flexible tube (5) is connected to the delivery port (2) through a connector (4) as in the above-mentioned conventional drip device. As is well known, the delivery port (2) is sealed with a rubber film after being filled with a drug solution (A) by a drug maker, and when used, the injection needle provided in the connector (4) is pierced and the drip bottle ( The chemical solution (A) in 1) is made to flow out.

At the lower end of the drip bottle (1), a sensor housing chamber (6) containing a sensor (7) is formed at the side of the delivery port (2).

The sensor (7) is a liquid medicine (A) in the drip bottle (1).
The ultrasonic wave oscillating element (7a) which radiates an ultrasonic wave pulse inside and the ultrasonic wave pulse reflected by the liquid level (L) of the drug solution (A) are received,
And an ultrasonic receiving element (7b) for outputting an electric signal. In addition, the ultrasonic wave transmitting element (7a) and the ultrasonic wave receiving element (7b)
Includes a one-element structure in which a piezoelectric element is selectively used in a time division manner.

In the sensor (7), at least the front end of the material (7c) for enclosing the ultrasonic wave transmitting element and the receiving element is connected to the drip bottle (1).
It is good to measure the matching of the acoustic impedance in the same way as the material of. By doing so, the reflected waves at the portions close to both elements are eliminated, and the closer interface of the chemical liquid (A) can be measured without disturbance.

The sensor (7) comprises a plug (8) and a conductor (9).
Is connected to the ultrasonic transmitter / receiver (10).

The ultrasonic transmitter / receiver (10) controls the sensor (7) via the lead wire (9), and injects ultrasonic pulses into the chemical solution (A) from the ultrasonic oscillator (7a) at appropriate time intervals. Injection, liquid level
When the ultrasonic pulse reflected by (L) is incident, the sensor
The electric signal output from the receiving element (7b) of (7) is received.

The ultrasonic transmitter / receiver (10) is a sensor.
The time when the ultrasonic wave oscillating element (7a) of (7) emits an ultrasonic wave pulse and the ultrasonic wave pulse reflected on the liquid surface (L) are the receiving elements.
At the time of incidence on (7b), timing signals are output and transmitted to the arithmetic control unit (11) at the next stage.

Two kinds of timing signals from the ultrasonic transmitter / receiver (10) are proportional to the distance between the liquid level (L) and the sensor (7) which changes according to the increase / decrease of the amount of liquid medicine in the drip bottle (1). It is output with a time difference of

The arithmetic control unit (11) performs a required arithmetic operation based on the time difference between the two types of timing signals, creates a plurality of types of drip management data, and sets two sets of display and alarm devices (12).
It is configured to send to (13). However, the time difference between the timing signals is calculated based on the phase difference between the main frequencies when the delay time difference is within one cycle at the main frequencies of the transmission signal and the reception signal.

Of the two sets of display and alarm devices (12) (13), 1
The set (12) is installed in the patient's room where the patient receives the drip, and the other set (13) is installed in the nurse station away from the patient's room.

The following data can be created as the drip management data. (i) Amount of drug solution in the drip bottle (1) (ii) Unit flow rate of the drug solution (A) (iii) Amount of drug solution injected from the start of the drip (iv) Duration of drip and elapsed time from the start of drip (v) Notification at the end of infusion of the set amount (vi) Other alarms such as occurrence of abnormal conditions

The amount of liquid medicine in the drip bottle (1) is the time until the ultrasonic pulse signal is emitted from the sensor (7), reflected by the liquid surface (L) and received by the sensor (7), that is, It is obtained by measuring the distance between the sensor (7) and the liquid surface (L) based on the time difference between the two kinds of timing signals and the propagation velocity of the ultrasonic wave in the chemical liquid (A).

The unit flow rate of the liquid chemical (A) is selected by selecting two ultrasonic pulse signals separated by an appropriate unit time, and comparing the time difference between the timing signals in the respective ultrasonic pulse signals, whereby the liquid chemical (A) within the unit time is Is calculated by calculating the decrease amount of

The amount of the drug solution injected from the start of the drip can be determined by the unit flow rate of (ii) and the elapsed time of (iv), or by the decrease amount of the drug solution (A) from the start of the drip.

The required drip time is determined by a preset drip amount and unit flow rate, and the elapsed time from the start of drip is indicated by the arithmetic control unit (11) or the display and alarm device (12) (13). The time may be determined by installing a clock device and activating it at the start of infusion.

The notification at the end of the drip may be calculated based on the above drip required time and the elapsed time, or (i
The notification signal may be sent to the display and warning devices (12) and (13) when the amount of the injected liquid medicine in ii) reaches a preset drip amount.

As for the alarm for the occurrence of other abnormal states, for example, when the unit flow rate of the chemical solution (A) increases or decreases outside a predetermined range, the occurrence thereof is detected and an alarm signal is output.

These management data created by the arithmetic and control unit (11) are stored in two sets of display and alarm devices (1
2) It is sent to (13) and each data is displayed moment by moment,
In addition, at the end of the (v) infusion, the operator is notified of this by a buzzer sound, a warning display lamp blinking, or the like.

Even when the abnormal state (vi) occurs, the buzzer and the display lamp are similarly operated, but in this case, a mode different from the notification of the end of the drip, for example, the buzzer sounds intermittently or the drip end is finished. It is desirable that the operator be able to respond promptly by blinking a display lamp different from the one for display.

FIG. 2 is a sectional view of the essential parts showing another embodiment of the drip bottle applied to the drip management device of the present invention.

At the lower end of the drip bottle (14) made of transparent synthetic resin,
Similar to the above embodiment, the flexible tube (5) is inserted through the connector (4).
It has a delivery port (15) connected to the.

At the bottom of the drip bottle (14) on the side of the delivery port (15),
A plane portion (16) is formed. The flat part (16) is provided with an infusion bottle (1
When 4) is suspended in use, it is formed horizontally so as to be substantially parallel to the internal liquid level (L).

An ultrasonic wave oscillating element (17
A cylindrical case (18) containing a sensor (17) including a) and a receiving element (17b) is mounted. The case (18) is a drip bottle (1
4) Adhesive whose acoustic impedance is similar to that of
The front end portion for receiving and transmitting ultrasonic waves is detachably attached to the flat surface portion (16) with an adhesive material or the like having an extremely thin layer in which acoustic impedance can be ignored.

Moreover, when the case (18) is mounted, the surface of the ultrasonic wave oscillating and receiving element of the sensor (17) is flat (16).
It is configured to be in close contact with. The front end face (17c) of the case (18), the front end face of the ultrasonic transmitting element (17a) and the ultrasonic receiving element (17b) is directly exposed, or the material of the drip bottle (14) Materials with the same acoustic impedance,
It is applied to the front end faces of the ultrasonic wave transmitting element (17a) and the ultrasonic wave receiving element (17b).

Each terminal (19) of the sensor (17) is connected to the case (18).
It is configured so that it can be connected to the plug (20) by protruding through the opening on the lower surface of the.

The lead wire (21) connected to the plug (20) is shown in FIG.
Similar to the above embodiment, the ultrasonic transmitter / receiver (10) is connected to the control device below.

The embodiment of FIG. 2 is also similar to the sensor described above.
(17) Based on the time difference between oscillation and reception of the ultrasonic pulse signal emitted from the liquid surface (L) and reflected, the above-mentioned various management data can be created to enable proper drip management. It is possible.

Moreover, since the sensor (17) is not built in the drip bottle (14) and is attached to the flat surface portion (16) of the drip bottle (14) at the time of use, Since the configuration is simple and it is not necessary to incorporate the sensor (17) in each drip bottle (14), the common sensor (17) can be replaced and installed for use, thus reducing manufacturing cost and running cost. It can be reduced.

[0055]

【The invention's effect】

(a) During the drip treatment, the amount of the liquid medicine and the unit flow rate in the drip bottle can be detected moment by moment and displayed quantitatively, so that the operator can appropriately set the drip conditions.

(B) Since the operator is informed by a buzzer sound or a display lamp that the prescribed amount of infusion has been completed, even if the operator is busy and cannot keep up with the patient, the operation is completed properly. Treatment can be performed.

(C) An alarm can be issued even when an abnormal condition occurs such that the unit flow rate of the chemical liquid (A) increases or decreases outside a predetermined range, and troubles due to medical errors can be prevented.

(D) The display and alarm device can be installed in parallel with the hospital room and the nurse station, and the progress of infusion can be monitored even when the operator is away from the patient room.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a drip bottle of an embodiment applied to a drip management device of the present invention, and a diagram showing a schematic configuration of a related control device.

FIG. 2 is a cross-sectional view of another embodiment of the drip bottle.

FIG. 3 is a schematic view of a conventional drip device.

[Explanation of symbols]

 (1) Drip bottle (2) Delivery port (3) Hanger (4) Connector (5) Flexible tube (6) Sensor chamber (7) Sensor (7a) Ultrasonic transmitter (7b) Ultrasonic receiver (7c) ) Sealing material (8) Plug (9) Conductive wire (10) Ultrasonic transceiver (11) Arithmetic control unit (12) Display and alarm device (for hospital room) (13) Display and alarm device (for nurse station) ( 14) Drip bottle (15) Delivery port (16) Flat part (17) Sensor (17a) Ultrasonic wave transmitting element (17b) Ultrasonic wave receiving element (17c) Front end face (18) Case (19) Terminal (20) Plug ( 21) Conductor (A) Chemical liquid (L) Liquid level

Claims (9)

[Claims] 1. An ultrasonic oscillating element mounted on the lower end of an infusion bottle, which emits an ultrasonic wave signal toward the liquid surface of the drug solution in the infusion bottle, and an ultrasonic wave signal reflected from the liquid surface to receive electricity. A sensor equipped with a receiving element that outputs a signal, an arithmetic and control unit that detects the state of the drug solution in the drip bottle based on the electrical signal from the sensor, calculates and outputs a drip management data signal, and a drip management data signal And a display device for displaying the status of the drip treatment based on the above. 2. The drip management device according to claim 1, wherein the ultrasonic signal is an ultrasonic pulse signal. 3. The sensor according to claim 1, wherein the sensor is embedded in a sensor storage chamber formed in a lower end region of the drip bottle.
Infusion control device described in. 4. The drip management device according to claim 1, wherein the sensor is mounted on the lower end of the drip bottle in contact with the lower surface of a flat portion formed parallel to the liquid surface. 5. The sensor according to claim 1, wherein at least the front surface of the exterior material surrounding the ultrasonic wave transmitting element and the ultrasonic wave receiving element of the sensor has the same acoustic impedance as the material forming the drip bottle. 4. The drip management device according to any one of 4. 6. The drip management data signal includes a signal indicating the amount of the liquid medicine in the drip bottle, which is obtained based on the time interval between the oscillation and the reception of the ultrasonic pulse signal. Infusion control device described in. 7. The drip management data signal includes a signal indicating a unit flow rate of the drug solution, which is obtained based on a difference in time interval between oscillation and reception of a plurality of ultrasonic pulse signals.
The infusion control device according to any one of 1 to 6. 8. A drip management data signal calculates the time required for a drip of a required amount based on the amount of decrease from the liquid surface at the start of drip or based on the unit flow rate of a chemical solution, and the time has elapsed. The drip management device according to any one of claims 1 to 6, further comprising a signal for lighting an end indicator lamp of the display device and activating a warning buzzer. 9. The drip management apparatus according to claim 1, wherein a plurality of sets of display devices are installed in parallel in a patient room and another room separated from the patient room.