JP2539858Y2 - Liquid level detector for drip containers - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for detecting the liquid level of a drip container for detecting the infusion completion state by drip or the drip container replacement time.

[0002]

2. Description of the Related Art Generally, in order to supply a drug solution or the like from a container to a living body through a tube, a drip tube, an infusion tube,
An infusion set including a clamp, an injection needle, and the like is used. When an infusion tube is inserted into an infusion container, a drug solution or the like in the infusion container is dropped into the infusion tube, and is infused through an infusion tube. Such a drip injection device is provided with a liquid level detection device that automatically detects a drop in the liquid level in the drip container.
As disclosed in Japanese Unexamined Patent Application Publication No. 63-160670 and Japanese Patent Application Laid-Open No. Sho 63-160670, a light projecting means and a light receiving means are mounted in pairs on the lower side of the drip container, and the change in the infusion amount in the drip container is detected by the light receiving means. When the infusion amount reaches a predetermined value or less, an alarm device such as a buzzer is sounded immediately to notify the end state of the infusion and the replacement time of the drip container by detecting the change in the output from the infusion.

[0003]

In the prior art, if the mounting positions of the light projecting means and the light receiving means are slightly different from each other even if the drip containers have the same shape, the light amount level reaching the light receiving means changes greatly. In this case, the mounting angle between the light emitting means and the light receiving means must be finely adjusted each time, or the amplification factor of the amplifier connected downstream of the light receiving means must be adjusted again. The reliability was extremely poor. Moreover, in recent years, the use of synthetic resin back types, which are safe against drop impacts, has increased in place of glass types, which are easily broken and have many dangers, and are compatible with all types of infusion containers. Thus, it was impossible to accurately detect the end state of the infusion and the replacement time of the drip container.

[0004] Specifically, for example, Japanese Utility Model Application No. 58-1468.
Microfill of No. 25 (No. 60-54930)
Light-emitting element on the body of the cylindrical float body.
A sensor support that incorporates a sensor and a light receiving element
The light receiving element detects the presence or absence of liquid inside the float body.
Disclosed is a medical float liquid amount detection device configured to
Have been. However, every time the float body is replaced,
The sensor mounting angle must be readjusted.
Replacement work is troublesome, and different types of
The sensor support cannot be used for the funnel body.
No. In addition, with the liquid remaining in the float body,
Since the detection signal is output from the element,
The float body is replaced before the liquid is completely used up.
The liquid, that is, the liquid medicine is wasted.

On the other hand, Japanese Patent Laid-Open Publication No.
Is in place in the pipe segment into which fluid from the reservoir flows.
In addition, an LED as a light emitting means and a tube liquid as a light receiving means
Attach an empty container detector that incorporates an optical sensor for
When air is in the segment,
A drug that directs light to an optical sensor for tube liquid and detects it
An air detection device in an injection device is disclosed.

[0006] However, the pipe segment simply flows a chemical solution or the like.
The empty container detector detects the presence of air.
In the detected state, not only in the reservoir but also in the piping segment
Fluid quickly empties. For this reason, replacement of the storage
Without the speed, it can be permanently air from entering the human body
Cause concerns that patients may feel anxious. Also, the object to be detected
Is formed in a cylindrical shape,
The difference in the amount of light received by the light receiving means depends on the presence of
It does not appear so noticeably and can increase the reliability of detection.
I can't.

In view of the above problems, the present invention has
Compatible with any type of drip container and can be detected with a liquid level sensor.
The reliability of knowledge can be improved, and
There is no waste, and the end state of the drug solution or drip container
Removes patient anxiety when detecting a replacement
It is an object of the present invention to provide a liquid level detecting device for a drip container that can perform the following.

[0008]

According to the present invention, there is provided a drip flow path for transporting a drug solution or the like in a drip container , wherein a transparent object to be detected containing the drug solution or the like and having at least one side formed in a square is provided. as well as arranged, said sensor holding part with respect to the detected body and attached and fixed, so that the optical axis in the sensor holder are matched through both surfaces to form a side of the sensing object, to said sensing body You
And a liquid level sensor comprising a light projecting means and a light receiving means for detecting a drop in the liquid level .

[0009]

According to the above configuration, when the sensor holding portion is attached and fixed to a predetermined portion of the detection target at the time of infusion by drip,
The liquid level sensor is set in accordance with the liquid level corresponding to the drip end state in which a certain amount of the chemical solution or the like remains or the drip container replacement time. Thereafter, when the liquid level of the medical solution or the like in the detected body falls below the optical axis of the liquid level sensor due to the progress of the infusion, the liquid level sensor determines the liquid level by a difference in attenuation of light caused by the presence or absence of the chemical solution or the like. it senses that it has reached a level.

At this time, the liquid level sensor is provided in the drip flow path.
To detect a drop in the liquid level inside the
Each time the drop container is replaced, adjust the mounting angle of the liquid level sensor, etc.
There is no need Ru pollock, to respond to drip container of any type
It becomes possible. In addition, the detection target can contain a chemical solution or the like.
So that the drip container is completely empty
Can be exchanged, and there is no waste of chemicals and the like. Further
Then, with the chemical liquid remaining on the object to be detected,
A detection signal is output.
This eliminates patient anxiety. Moreover, it is square
Through both sides of one piece of the object to be detected formed in
Since the optical axis is aligned with the light receiving means, the liquid
The difference in the amount of light received by the light receiving means according to the
It appears that the reliability of liquid level sensor detection can be improved.
it can.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 to 4 show a first embodiment of the present invention,
As shown in the schematic explanatory view of FIG. 1, a guide rail 3 is provided on a ceiling 2 of a hospital room 1.
The moving body 4 is provided so as to be slidable along. Reference numeral 5 denotes a hanger attached to the moving body 4. The hanger 5 has a transparent synthetic resin back type drip container 6 containing a chemical solution or the like.
Are exchangeably suspended. A well-known infusion set including an infusion tube 7, an infusion tube 8, a clamp 9, a syringe needle 10, and the like is connected to the infusion container 6, and the medical solution and the like in the infusion container 6 are supplied to a living body. A certain infusion tube 8
A transparent cylindrical detection body 12 having one side 11 formed at 90 ° is provided in the middle of the drip tube 7 so as to be fixed to the upper portion of the drip tube 7. Reference numeral 13 denotes a sensor holding portion formed in a U shape, and the sensor holding portion 13 is attached and fixed so as to be vertically movable with respect to the detection target 12,
On both sides of the sensor holding portion 13, the optical axis 14 in a state where the detection target 12 is empty forms both sides 11 </ b> A, 11 forming one side 11 of the detection target 12.
A liquid level sensor 15 including a light projecting means 15A and a light receiving means 15B, which constitutes a transmission type photoelectric sensor so as to coincide with each other through B, is provided. Further, an amplifier unit 16 is connected to the liquid level sensor 15 via an electric cord 17, and this amplifier unit 16 relays the electric
Notification unit 19 and bed of nurse center 18 by
It is connected to a notification unit 21 attached at or near 20.

FIG. 2 shows a liquid level detecting unit, and a scale for indicating the remaining amount of a chemical solution or the like is provided on one side surface 11A of the detection object 12 provided between the drip tube 7 and the infusion tube 8. A portion 22 is formed, and an air valve 23
Are formed. In addition, both ends 24A, 24
B is provided with a plurality of convex pieces 25A and 25B, and the sensor holding section 13 is detected while engaging any one of the convex pieces 25A and 25B with the concave groove 26 of the sensor holding section 13. Body 12
When mounted on the body of the sensor, the light projecting means 15A and the light receiving means 15B of the liquid level sensor 15 embedded in the inner surface of the sensor holding
The detection object 12 faces each other at a position sandwiching both surfaces 11A and 11B of the detection object 12. At this time, when the detection target 12 is empty, the optical axes 14 of the light projecting means 15A and the light receiving means 15B coincide with each other, and the detection target 12 is inserted through a hole 27 provided on the inner surface of the sensor holding unit 13. Pass through both sides 11A and 11B. Also,
The power cord 17 is led out from the lower surface of the sensor holder 13. The amplifier unit 16 connected to the multi-end of the power cord 17 has a sensitivity adjustment volume (not shown), an optical axis adjustment check pin, an operation indicator, and a stability indicator. Indicator lights and the like are provided. Further, the notification unit 19 provided in the nurse center 18 is provided with a plurality of display lamps 28, a buzzer 29, a reset button 30, a buzzer stop button 31, and the like corresponding to each hospital room 1, and is based on the liquid level sensor 15. Indicator lamp 28 according to the signal
Lights up and the buzzer 29 sounds. This may be canceled by the reset button 30 and the buzzer stop button 31, but the buzzer 29 may be stopped after a certain time by a timer. The notification unit 21 is provided with one display lamp 28A and one buzzer 29A.

FIG. 3 shows an example of the notification circuit in a state where four liquid level detection devices are connected. As shown in the figure, the commercial power supply includes a transformer and a rectifier circuit (not shown),
A power supply circuit 32 for converting 100 V to DC 24 V is connected, and a power supply voltage of DC 24 V is supplied to each amplifier unit 16 and a relay circuit. Then, when the amount of light received by the light receiving means 14B of the liquid level sensor 15 reaches a predetermined level or more, a signal is output from, for example, the amplifier unit 16 of the AMP1, and the relay (X1) is energized via the normally closed reset switch 30A. As a result, the self-holding relay contact (X1) of the lamp circuit is turned on, the display lamps (OL1) 28 and 28A are turned on, and the relay contact (X1) of the buzzer circuit is also closed to close the normally closed relay contact (28X1). ) Via relay (B
X1) is energized, whereby the relay contacts (BX1) connected in series to the buzzers (BZ) 29, 29A are closed, and the buzzers (BZ) 29, 29A sound. Further, by performing the reset operation, the relay (X1) is turned off and the relay contact (X1) is opened, so that the display lamps (OL1) 28, 28
A goes out and the buzzer circuit relay contact (X
Since 1) is also closed, the buzzers (BZ) 29, 29A also stop sounding. On the other hand, the buzzer stop button
When the button 31 is pushed, the normally open buzzer stop switch 31A is closed to energize the relay (PBZX), thereby closing the relay contact (PBZX) and energizing the relay (28X1).
As a result, the normally closed relay contact (28X1) is opened, the relay (BX1) is turned off, and the buzzer (BZ) 29, 29A stops sounding because the relay contact (BX1) is opened.

Next, the operation of the above configuration will be described. At the time of infusion by drip, a transparent drip container 6 containing a transparent drug solution 33 and the like is hung on
The sensor holding portion 13 is attached and fixed to the detection target 12 while engaging one of the positions A and 25B with the concave groove 26. At this time, when the concave groove 26 is engaged with the uppermost convex pieces 25A and 25B, the liquid level sensor 15 indicates that the remaining amount of the chemical liquid 33 and the like is 25C.
C is set to the liquid level level corresponding to the drip end state for detecting whether or not the liquid has reached C or the time for replacing the drip container. Hereinafter, the engagement position between the convex pieces 25A and 25B and the concave groove 26 is moved downward while moving downward. As the sensor holder 13 is attached and fixed to the detection target 12, the liquid level sensor 15 has
It is set to the liquid level position for detecting whether CC or 5CC has been reached. In this state, when the power supply (not shown) is turned on to start the infusion, the light emitting means 15A emits light by the power-on operation. At this time, as shown in FIG. 4, in a state where the detection target 12 is filled with the chemical liquid 33 or the like, the light from the light projecting means 15A is applied to one side surface 11A of the detection target 12 by the lens action of the chemical liquid 33 or the like. Is reflected by
The light amount reaching the light receiving means 15B is lower than a predetermined level and no notification is made. On the other hand, when the infusion proceeds and the liquid level of the liquid medicine 33 or the like in the detection target 12 falls and becomes lower than the optical axis 14, the detection target 12 becomes empty as shown in FIG. As a result, the light from the light projecting means 15A sequentially passes through the one side surface 11A, the object 12 to be detected, and the one side surface 11B, and reaches the light receiving means 15B with little refraction or reflection. Therefore, a detection signal is output, and based on the detection signal, the notification unit 19 of the nurse center 18 immediately operates, the display lamp 28 and the buzzer 29 sound, and the notification unit 21 provided on the bed 20 is activated. Operate.
With this notification, the nurse can go to the sickroom 1 to perform the treatment for terminating the infusion or replace the drip container 6.

As described above, in this embodiment, the light projecting means 15 is provided to the transparent object 12 provided in the drip flow path.
A and a sensor holding portion 13 provided with a liquid level sensor 15 composed of a light receiving means 15B are attached and fixed.
Is to always detect the liquid level of the liquid medicine 33 and the like in the detection object 12 disposed in the drip flow path, so that the mounting angle of the liquid level sensor 15 is changed each time the drip container 6 is replaced as in the conventional example. It is no longer necessary to adjust the amplification factor of the amplifier unit 16 or the amplifier unit 16, and it is possible to accurately detect the end condition of the infusion and the replacement time of the drip container 6 for all types of drip containers 6 regardless of the glass type and the back type. It becomes possible.
In addition, since the detection target 12 can store the liquid medicine 33 and the like,
When the container 6 is completely empty, the drip container 6 is replaced.
And there is no waste of the liquid medicine 33 or the like. In addition, detected
Detected from liquid level sensor 15 with liquid 33 etc. remaining on body 12
Since the signal is output, do not replace the drip container 6 in a hurry
May remove the patient's anxiety. The liquid level sensor 15 is configured such that the optical axis 14 when the object 12 is empty is aligned with both sides 11A and 11B of one side 11 of the object 12 formed at 90 ° so that the light projecting means 15A and the light receiving Means 15B
The light path from the light projecting means 15A travels in a direction different by 90 ° between the case where the detection target 12 is filled with the chemical liquid 33 and the like and the case where the liquid is empty, and the light reaching the light receiving means 15B is provided. Since the difference in the amount appears remarkably, the chemical solution in the
It is possible to reliably detect a drop in the liquid level such as 33, and to further enhance its reliability. Further, a plurality of convex pieces 25A,
By engaging any one of the grooves 25B with the concave groove 26, the sensor holding portion 13 can be mounted so as to be movable in the vertical direction of the detection object 12, so that the drip speed and the hospital room 1 and the nurse center can be attached. It is also possible to adjust the liquid level detection level according to the distance to 18 and the like, and the usability can be greatly improved. Moreover, as an effect on the embodiment,
Scale section 22 for indicating the remaining amount of liquid medicine 33 or the like on the body of detected object 12
So that if formed, can determine in advance how much of a residual volume of the notification unit 19 and notification unit 21 is operated, together with the removed mental anxiety of the patient, drip exchange by nurses is also appropriately performed In addition, continuous infusion can be performed smoothly.

FIG. 6 shows a second embodiment of the present invention, in which the same portions as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted. In the present embodiment, the sensor holding unit 41
Is movably mounted and fixed at an arbitrary position in the vertical direction with respect to the detection object 44 by the slide piece 42 and the engagement groove 43,
Furthermore, to indicate whether the notification unit 19 and the notification section 21 to become advance how much of the remaining amount is activated, the sensor holding portion
A window 45 is formed in the window 41, and ruled lines 46 are provided on both sides of the window 45. Then, for example, the ruled line 46 is
By matching with “25” of 47, the liquid level sensor 15 including the light projecting means 15A and the light receiving means 15B provided on the inner surface on the back side of the detection object 44 can detect the remaining amount of the chemical 33 and the like in the detection object 42. Outputs a detection signal at the time when has reached 25 CC.

The present invention is not limited to the above embodiments, and various modifications can be made within the scope of the present invention. For example, the shape and structure of the sensor holding unit are not limited to the embodiments in the present invention and can be changed as appropriate. In addition, a drug solution and the like include physiological saline,
It contains nutrients, blood and the like.

[0018]

According to the present invention , in a drip flow path for transporting a drug solution or the like in a drip container, a transparent detection object containing the drug solution or the like and having at least one side formed in a rectangular shape is provided. the sensor holding portion is attached and fixed to, so that the optical axis in the sensor holder are matched through both surfaces to form a side of the detection object, the liquid level level in該被sensing body
Are those in which a liquid level sensor comprising a light projecting means and light receiving means for detecting a drop, any type infusion container
To improve the reliability of detection by the liquid level sensor.
And no waste of chemicals, etc.
The end state of the liquid or the replacement state of the drip container is detected.
Sometimes, it is possible to provide a drip container liquid level detecting device capable of removing anxiety of a patient .

[Brief description of the drawings]

FIG. 1 is a schematic explanatory view in a use state showing a first embodiment of the present invention.

FIG. 2 is a perspective view of the same device.

FIG. 3 is a circuit diagram of the same.

FIG. 4 is an explanatory diagram showing a case where a detection target is filled with a chemical solution or the like.

FIG. 5 is an explanatory diagram showing a case where the detection target is in an empty liquid state;

FIG. 6 is a perspective view showing a second embodiment of the present invention.

[Explanation of symbols]

 6 Drip container 8 Tube 11 One side 11A, 11B Both sides 12 Detected object 13 Sensor holding part 14 Optical axis 15 Liquid level sensor 15A Light emitting means 15B Light receiving means

Claims (1)

(57) [Scope of request for utility model registration] To 1. A drip flow path for transporting a chemical solution drip containers, with disposing the transparent sensing object to at least one side housing the liquid medicine or the like is formed in prismatic, with respect to the detection object the sensor holding portion is fixedly attached to the sensor holder so that the optical axes coincide throughout sided forming one side of the detection object, the liquid level of the level drop in該被sensing body
The liquid level detecting apparatus infusion container, characterized in that a liquid level sensor comprising a light projecting means and light receiving means for detecting.