JPH0715550Y2 - Drip flow controller - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a drip flow rate control device, and more specifically, displays a drip flow rate, a planned amount, and a cumulative amount, and when the planned drip amount is completed and when the liquid runs out. The present invention relates to a drip flow rate control device capable of calling attention by a display and / or voice when a drip is abnormal and further stopping drip.

[Problems to be solved by conventional technologies and devices]

Conventionally, when performing an infusion, the infusion rate etc. was calculated according to the type of infusion set, and the height of the liquid surface in the infusion tube and the drop interval were visually determined to adjust the infusion rate etc. .

However, in this method, stoppage due to completion of drip, replacement due to liquid shortage, etc. are predicted based on the elapsed time, and accuracy is lacking. Also, in the case of an abnormal drip, it could be recognized only by visual inspection, and it may be left unknowingly, which was dangerous.

Therefore, the present invention displays the flow rate, planned amount, and cumulative amount of the drip, and alerts the user with a display and / or voice when the planned drip amount is completed, when the liquid runs out, or when the drip is abnormal, and further, the drip is stopped. An object of the present invention is to provide a drip flow rate control device capable of performing the above.

[Means for Solving the Problems]

The drip flow rate control device of the present invention has a means for detecting a drop of infusion or the like falling in the drip tube, and calculates an output signal (the number of drops, its time interval, etc.) from this detecting means. The calculation means (calculation of the flow rate of the drip, calculation of the cumulative amount, etc.) is performed. The numerical result obtained by the calculation is displayed by the display means.

The drip flow rate control device of the present invention further comprises means for comparing and judging the numerical value obtained by the arithmetic means with a preset numerical value, and means for outputting the judgment result of this judging means. Therefore, when it is determined that the planned infusion amount has been completed, the liquid has run out, or the infusion is abnormal, an alarm is issued to alert the caregiver, such as by displaying the situation or issuing a sound.

Further, it comprises means for closing the drip tube in response to the judgment result of the judging means (completion of planned drip infusion, liquid shortage, abnormal drip, etc.), and the calculating means, the judging means, the output means and the closing means are provided. It is provided in the same housing.

The closing means has a hook-shaped member that penetrates the housing and can be displaced inward / outward of the housing, and hooks the drip tube on, for example, the hook of the hook-shaped member before the drip is started. By interposing in the gap between the hook portion and the outer surface of the housing, the hook-shaped member is displaced inward of the housing in the case of an abnormal drip, and the hook portion and the outer surface of the housing cause The drip tube can be occluded and the drip can be stopped.

[Action]

The drip flow rate control device of the present invention detects drops of an infusion solution or the like falling in the drip tube by the detection means and calculates an output signal from the detection means during normal drip.
The numerical result obtained by the calculation, that is, the flow rate of the drip, the cumulative amount, and the set value (planned amount) are displayed. When the planned drip infusion is completed, when the liquid runs out, or when the drip is abnormal, the situation is displayed and / or voiced to call attention. Further, the drip flow rate control device of the present invention can stop the drip while giving a warning.

〔Example〕

 An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a diagram when the detection means (hereinafter, also referred to as “drip sensor”) in the drip flow rate control device of the present invention is attached to a drip tube of an infusion set.

The drip sensor (1) is a device that is attached to a drip tube (A) of an infusion set as shown in FIG. 1 and detects an infusion solution (B) falling in the drip tube (A). Usually, it has 1 to 10, preferably 2 to 3 sensors (15) and one or more, preferably 2 light sources (16), and the drip tube is 20 ° to the vertical direction. It is possible to measure even with a slight tilt. When a plurality of sensors (15) and light sources (16) are arranged, it is desirable that they are arranged on the same plane. As the type of the sensor (15), it is preferable to use a phototransistor, a photodiode or the like. As the light source (16), it is preferable to use an infrared light emitting diode, a laser, or the like.

The output signal from the drip sensor (1) (number of drops, time interval thereof, etc.) is used to calculate the flow rate of drops, cumulative amount, etc.,
A comparison display is made to see if the flow rate is within a preset range.
The setting range of the flow rate is 10 to 1000 ml / h, and it is displayed that it is within ± 10% of this setting value. Even if the drip is abnormal (the drip flow rate is outside the set range, specifically, 1/2 or less or twice the target set value), the drop state (usually about 4 drops) The infusion is automatically stopped and a warning is given that the infusion is abnormal. As the alarm means, not only display means such as LED (light emitting diode), liquid crystal display, fluorescent display, but also sound means such as alarm, buzzer and chime are exemplified.

Further, the cumulative amount is compared with a preset planned amount, and when the cumulative amount reaches the planned amount, the tube is immediately closed and the drip is automatically stopped. At this time, the alarm means is activated to warn that the planned amount has been reached. still,
The set range of the planned amount is 10 to 9990 ml.

In addition, when the liquid drops out of the infusion solution, if the drop does not fall between the newest few drops (usually about 10 drops) within the set speed range, the drip is automatically stopped and
An alarm means such as sounding a buzzer warns that the liquid is running out.

However, the above-mentioned alarm means does not operate unless the above situation occurs.

An infusion set usually means an infusion tube, needle, drip tube, octopus tube, and clamp, and types of infusion set include general infusion sets made by JMS, Nipro, Terumo, etc., pediatric Use an infusion set.

Means for closing the drip tube (hereinafter, "drip stopper")
Also called. ) (2) is a housing (24) as shown in FIG.
The solenoid valve main body (21) provided inside, penetrates through the opening (25) that is connected to the solenoid valve main body (21) and is perforated in the housing (24), and extends outward of the housing (24). It is composed of a hook-shaped member (22) that protrudes, and the hook-shaped member (22) is displaced in the outer / inward direction of the housing (24) (vertical direction in FIG. 2) by the operation of the solenoid valve body (21). To do. Before the drip is started, the tube (C) is hooked on the hook portion (23) of the hook-shaped member (22) or attached to the outer surface (26) of the housing (24) by, for example, the tension acting on the tube (C). Then, the tube (C) is interposed in the gap (27) between the hook portion (23) and the outer surface (26). In the drip flow rate control device of the present invention, the drip stopper (2) has a casing (2
Since it is provided in 4), there is no need to fix the drip stopper (2) to the pole when installing this device, and there is an effect that installation can be completed in a short time.

Solenoid valve automatically when there is something wrong with infusion or drip infusion, when the accumulated amount reaches a preset amount, and when the silence / stop switch (3) is stopped. The main body (21) is operated, and the hook-shaped member (22)
Lower inward (arrow 28) of the housing (24), and
The tube (C) is closed by 3) and the outer surface (26) to stop the drip.

In addition, when the start switch (7) is turned on, the solenoid valve body (21) is automatically operated to raise the hook-shaped member (22) outward of the housing (24), and the tube ( Open C). Operations such as closing and opening are activated by command signals from a microcomputer controlling the solenoid valve body (21). This solenoid valve body (21) consumes electric power only at the moment of operation in order to save energy. The shape of the member (22) for pressing the drip tube is not particularly limited, and examples thereof include a cross section having a circular shape, a polygonal shape, and a combination thereof.

Another example of the drip stopper is shown in FIG. In FIG. 3, as the motor (31) rotates, the eccentric cam (32) rotates, and the member (22) that presses the drip tube (C) moves up and down. The position of the member (22) is controlled by sensing the signal plate (33) of the drive shaft of the motor (31) with the photo sensor (34).

FIG. 4 (a) is a front view of the drip flow rate control device of the present invention,
FIG. 4 (b) is a rear perspective view.

Check the number of drops per ml of the infusion set to be used, and select the infusion set selection switch (4) [1 ml = 15, 19 or 60 drops]
Set the number of drops per 1 ml of the infusion set with (this switch (4) is invalid in the start state, and is valid only in the stop state).

As the numeral display part (5), LED (light emitting diode),
Means such as liquid crystal display and fluorescent display are exemplified, and any one of the flow rate, the planned amount, and the accumulated amount is displayed.

The alarm display section (6) blinks when the infusion solution runs out, when there is a drip abnormality, and when the preset planned amount is completed. The alarm display section (6) does not go out until the start switch (7) is pushed. When started, the drip sensor (1) detects the drip of the drip.

The flow rate / scheduled volume setting switch (8) is used when setting the target flow rate and the planned infusion volume. In the numeral display section (5), pressing the “Δ” of the flow rate / scheduled quantity setting switch (8) increases the number, and pressing the “▽” decreases the number, and a confirmation sound sounds each time it changes. If the planned infusion volume is set to 0 ml, the alarm will not be activated even when the planned infusion volume is completed.

The display mode lamp (9) indicates the mode (flow rate / scheduled amount / cumulative amount) displayed on the numeral display section (5). The unit is "ml / h" for the flow rate and "ml" for the planned / cumulative amount.

The display mode changeover switch (10) is a switch for switching the contents displayed on the numeral display section (5) (each time the switch is pressed, the displayed contents are “flow rate” ……> “scheduled amount” ……>
It changes in the order of "cumulative amount"). This switch is effective in both start and stop states.

The accumulated amount clear switch (11) returns the accumulated amount display value to "0000" (it is necessary to keep pressing for about 2 seconds or more).
This switch (11) is effective in the stop state and when the display mode is the cumulative amount.

The flow rate relative value level display (12) shows the ratio (%) of the actually measured flow rate value to the target flow rate value at the position of the LED array (after calculating the flow rate for each drop and turning off the light for about 100 msec, Turn on the corresponding LED).

The drip stopper release switch (13) is used to stop the drip treatment when the planned infusion amount is completed.
Press to release the tube.

The mute / stop switch (3) is pressed when the alarm sound is erased and when the alarm is stopped.

The alarm volume adjustment switch (14) is used when adjusting the volume of the alarm sound.

Operations such as comparison and determination of numerical values are arithmetically controlled by a microcomputer (20) as shown in FIG. 5, for example.

The microcomputer mainly includes a microprocessor (central processing unit), a memory (storage device), and an interface (input / output signal processing circuit). The microcomputer receives the drop signal from the drip sensor (1) through the interface, calculates the drip flow rate and the accumulated amount, compares the set flow rate and the value of the planned infusion amount stored in the RAM, and determines the above. The result is output by display or the like.

Hereinafter, a method of using the drip flow rate control device of the present invention will be specifically described.

Attach the pole clamp (17) to the pole (D), insert the AC adapter (18) into the outlet, and turn the main power switch (19) to "ON" to open the drip stopper (2). Pass the tube (C) through (2) . Next, the drip sensor (1) is attached to the drip tube (A) of the infusion set, and the amount corresponding to the volume of one drip determined by the type of the infusion set is input by the infusion set selection switch (4).

Input the target flow rate value or planned infusion volume with the flow rate / scheduled volume setting switch (8) and press the start switch (7).
Starts measurement and display of flow rate value and accumulated amount, and alarm judgment.

[Effect of device]

As described above, the drip flow rate control device of the present invention can easily set the target drip flow rate and the planned infusion amount, and can immediately grasp the drip flow rate, the planned amount, and the cumulative amount. Further, when the planned drip infusion is completed, when the liquid runs out, or when the drip is abnormal, the situation is alerted by an alarm means such as sounding.

Further, in the drip flow rate control device of the present invention, since the closing means is provided in the housing of the device body, the device can be installed easily and can be completed in a short time. The closing means has a hook-shaped member penetrating the housing and displaceable inward / outward of the housing, and the drip tube is hooked on, for example, a hook of the hook-shaped member before the drip is started. Then, by interposing in the gap between the hook portion and the outer surface of the housing, in the event of an abnormal drip, the hook-shaped member is displaced inward of the housing, and the hook portion and the outer surface of the housing cause the drip infusion. The tube can be occluded and the drip can be stopped automatically.

[Brief description of drawings]

FIG. 1 is a diagram showing a state in which a drip sensor is attached to a drip tube of an infusion set, FIG. 2 is a sectional view of a drip stopper, FIG. 3 is a sectional perspective view showing another aspect of the drip stopper, and FIG. a) is a front view of the drip flow rate control device of the present invention, (b) is a rear perspective view, and FIG. 5 is a functional block diagram of the drip flow rate control device of the present invention. (A) …… Drip tube (B) …… Drop (1) …… Detection means (5) …… Display means (6) …… Judgment result output means (C) …… Drip tube (2) …… Closed means

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP 54-102089 (JP, A) JP 60-142863 (JP, A) JP 63-133242 (JP, A) Special table Sho 62- 500984 (JP, A)

Claims (1)

[Scope of utility model registration request] 1. A means for detecting a drop in a drip tube, a means for calculating an output signal from the detecting means, a means for comparing and judging a numerical value obtained by the calculating means with a preset numerical value, In the drip flow rate control device comprising means for outputting the judgment result of the judging means, and means for closing the drip tube corresponding to the judgment result of the judging means, the calculating means, the judging means, the output means and the closing means are A drip flow rate control device provided in the same housing, wherein the closing means has a hook-shaped member that penetrates through the housing and can be displaced inward / outward of the housing.