KR20100114599A - Method for metering the flow rate using vertical surface tension and system for controlling an amount of liquid adminstration using the method - Google Patents

Abstract

PURPOSE: A flux measuring method using a plumb surface tension and a liquid injection amount controlling system using the same are provided to efficiently perform medication management and patient care by remotely informing managers or patients of medication injection time and amount. CONSTITUTION: A flux measuring method using a plumb surface tension comprises a liquid storing pack(1), a instillation chamber(2), a liquid droplet sensor(5) and a dose adjuster(7). The liquid storing pack stores liquid like ringers solution. The instillation chamber drops the liquid of the liquid storing pack through a cylinder pipe(3) to supply to a lower connection hose(4). The liquid droplet sensor senses the liquid droplet which is supplied from the instillation chamber.

Description

Method for metering the flow rate using vertical surface tension and system for controlling an amount of liquid adminstration using the method}

The present invention calculates the flow rate of a unit liquid droplet by using the principle that the weight of the liquid droplet formed in the weight direction by the vertical surface tension in the cylindrical tube having the equilibrium pressure and a constant area is equal to the vertical surface tension of the liquid droplet. After that, the supply flow rate of the liquid drop is calculated to precisely measure the total flow rate, and the precisely measured flow rate is applied to the liquid administration, such as Ringer's solution. The present invention relates to a flow rate measurement method using a vertical surface tension that is effectively used for medication management and patient management by precisely controlling hourly doses and administration disorders by remote notification to a patient or a manager, and a liquid dosage control system using the same.

In general, a liquid therapeutic agent, glucose or injection solution, etc. required by a patient are injected into a patient's blood vessel using a liquid storage pack.

In this case, the quantitative provision of liquid total dose, time step dose, etc. according to the patient is a very important problem in the treatment and administration of the patient.

When checking the conventional Ringer's fluid injecting device as an example, Ringer's pack with a built-in Ringer's solution, a hose connected to the lower ringer's pack, a drop chamber to check the dosage of Ringer's solution on the hose, a syringe injected into the patient's blood vessel, It consists largely of regulators that control the dose supplied through the hose.

However, such a conventional device adjusts the dose by manually adjusting the regulator according to the situation identified by the eye through the drip chamber, so that the patient's environmental change (for example, movement, movement, etc.) or administration disorder (vanyl blockage, etc.) If the dose is changed, the patient has the inconvenience that other administrators should frequently check the dosage of Ringer's solution, as well as the problem that it is difficult to precisely adjust the dose and detect the administration disorder.

In order to solve such a conventional problem by automatic flow control, a number of droplet counting methods using light, a flow control device structure, and the like have been known.

Flow rate measurement methods for falling objects include a method of measuring the drop period and the size of the drop by placing a special electrode shape in the drop chamber of Sedlier (US Patent No. 4105028, 1978), and the Marx (US Patent No. 432224, 1979). A method of calculating the volume of a drop by measuring the width of the drop and the shape of the drop by attaching an infrared pulse generator and two optical sensors to the drop chamber, and a special shape drop chamber of Steuer (US Patent No. 450463, 1985). There was a way to calculate the volume of the droplet as a signal that appears through light.

 Drop cycle measurement methods and methods include a technique for measuring a drop cycle in a drop chamber using light filed by Darling (US Patent No. 353176, 1964) and adjusting the drop cycle with a motor when it differs from a preset cycle. And the drop period of a desired drop filed by Corbin (US Patent No. 3197068; 1965, US Patent No. 32152623; 1966).

(desired drop frequency) and the algorithm to correct the drop period (actual drop frequency) and the drop period of the actual droplets have been proposed, Hidebrant (US Patent No. 3450153, 1969) proposed to reduce the drop period between the two drops The method of measuring the period by calculating the interval, Deltour (US Patent No. 363090, 1971) uses a reflector to measure the period of the drop, and when the Prtree (US Patent No. 3601124, 1971) is abnormal, The motor-controlled proposals, Hidebrant (US Patent No. 3609379, 1971) propose a method for detecting the absence of liquid in the drip chamber using light, and Swick (US Patent No. 3609379, 1971) in the press device. A tube structure proposal for easy control and Cambell (US Patent No. 363144, 1971) have a conductor plate with polarity in the drop chamber to detect the conductivity of the liquid and measure the drop period, and Kienitz ( United States of America Patent No. 3655095, 1972) proposes to generate an alarm when there is an error in the period after measurement of the drop period using light, and suggests a method of drop cycle control using a step motor of Geogi (US Patent No. 3736930, 1973). Of the electromagnet after counting the drop period by placing the electrode in the electromagnetic field of McComick (US Patent 379794, 1974) and placing the electrode in the drop chamber of Geogi (US Patent 3880794, 1974). Proposal to control the drop droplet period by the stepping pressure, the proposal of the shape of the electrode to count the drop in the drop chamber of Pierce (US Patent No. 3890968, 1975), and the drop period of Moulet (US Patent No. 4001801, 1977) Proposed circuit configuration for counting and counting cycles using light even in the state of tilting LeFever (US Patent No. 4038981, 1977) and controlling the drop period by controlling the position of the ball using electromagnetic And the proposal of a method and circuit for measuring the drop period using Walter (US Patent No. 4434468, 1982) and measuring and controlling the flow velocity with an optical sensor, and the drop of Stiff (US Patent No. 4432468, 1984). Proposal to control alarm and flow rate when out of cycle, independent drop cycle measurement and control scheme to supply two injections of Bujan (US Patent No. 4432468, 1984), Bisera (US Patent No. 450463, 1985) Proposal of flow control using pump and pressure sensor, Structural proposal to control the drop period by controlling the hole size of the entrance and exit of Tarzian (US Patent No. 5098408, 1992), Strachevich (US Patent No. 5098408) , 1997) and the method for installing the tube cross-sectional area control device and the method of installation, and the method to measure the drop period even when tilted with one light generator and three light-receiving sensors of Molko (US Patent No. 6803206, 2000). Proposal, Yoshioka (the United States (6558346, 2003), a proposal to control the flow rate using a constant pressure bag to maintain a constant pressure in a Ringer's solution vessel, and two pole plates facing the outer periphery of the drip chamber of Brown (US Pat. No. 6562012, 2003). It is proposed to measure the drop size and drop period by detecting the change in capacitance as the liquid passes through the plate, and Gallagher (US Pat. No. 6,667,801 B1, 2004) to detect droplets in droplets using optical fibers. There was a suggestion of how.

In addition, in Korea, if there is a difference between the pre-set free fall time interval of Kang Sang-wook and three others (registered patent 10 0664615) and the measured value of the optical sensor, the tube presser increases or decreases the cross-sectional area of the tube to maintain a desired speed. There is a proposal for an adjustment device.

However, it is difficult to precisely control the dosage due to the difficulty of precisely measuring the weight of the liquid drop that is supplied drop by the conventional methods, as well as various control of the dosage according to the change of the administration environment. Problems such as the difficulty of precise control of the dosage were still included.

The present invention is to solve the problems of the prior art and to differentiate from the prior art, the weight of the liquid droplet formed in the weight direction by the vertical surface tension in the cylindrical tube having the equilibrium pressure and a certain area It is an object of the present invention to provide a flow rate measuring method using surface tension for precisely measuring the total flow rate by calculating the flow rate of a liquid drop after calculating the flow rate of a unit liquid drop by using the same principle as the vertical surface tension.

Dose set by the user by applying the flow rate precisely measured by the flow rate measurement method using the vertical surface tension of the present invention to the liquid administration, such as Ringer's solution, dosages per unit time and the like currently supplied, dosages per unit time, It is an object of the present invention to provide a liquid dosage control system that can be effectively used for medication management and patient management by precisely comparing the administration disorders and precisely controlling the patient or the administrator by remote notification.

This invention,

Using the principle of free fall in the direction of gravity when a liquid drop is formed in the direction of gravity due to the vertical surface tension in a cylindrical tube having an equilibrium pressure and a constant area, and the weight (Wg) of the liquid drop is greater than the vertical surface tension (Fg). The weight (Wg) of the falling liquid drop is calculated by calculating the weight of the falling liquid drop by the relation formulated equal to the vertical surface tension (Fg) of the liquid drop, and the process of counting the number of the falling liquid drops It is characterized by providing a flow rate measuring method using the vertical surface tension to calculate the total flow rate of the falling liquid droplets.

The present invention provides a liquid storage pack for storing a liquid such as Ringer's liquid, a drop chamber for dropping the liquid in the liquid storage pack in a drop form through a cylindrical tube and supplying it to the lower connection hose, and a liquid drop drop supplied from the drop chamber. And a dose controller for adjusting the dose of the liquid supplied through the connecting hose by the microcomputer according to the dose of the liquid droplet detected by the detector, wherein the cylindrical tube has an equilibrium pressure. And the microcomb is formed in a capillary shape having a vertical surface tension by a certain area, and the microcomputer detects the number of unit liquid drops dropped from the cylindrical tube by the vertical surface tension by a detector, and the flow rate of the liquid drops dropped and supplied. A measurement input unit for measuring and inputting a drop cycle, and a flow rate and a drop of the liquid droplet measured and input by the measurement input unit; Comparator for comparing the total dose set by the user and the dosage per unit time with respect to the cycle, and by adjusting the opening and closing the dose regulator by the value compared in the comparison unit to adjust the dose of the liquid supplied through the connecting hose It is a feature of the present invention to provide a liquid dosage control system composed of a control unit which controls to control.

The dose controller of the present invention is coupled to the drive rod driven by the drive motor and the interlocking gear meshed with the interlocking gear to move back and forth, the grip portion formed in the form of hooks on the tip of the tightening rod pulls the cross-sectional size of the connection hose It is a feature of the invention to provide a liquid dosage control system which is adapted to adjust the liquid dosage per unit time by means of regulation.

The present invention calculates the flow rate of the unit liquid droplets using the principle that the weight of the liquid droplets formed in the weight direction by the vertical surface tension in a cylindrical tube having an equilibrium pressure and a constant area is equal to the vertical surface tension of the liquid droplets. After calculating the number of supply of the liquid droplets to provide accurate measurement of the total flow rate, as well as by precisely measuring the flow rate of the drop-liquid liquid fluid applied to the liquid administration, such as Ringer's solution, per user set dosage, per unit time Compared to the dosage and the currently supplied dosage, dosage per unit time, administration disorders, etc. by precisely controlling the remote notification to the patient or administrator has an effective use in the administration of medication and patient management.

First, the flow measurement method of the drop fluid supplied through the cylindrical tube of the present invention will be described.

In a cylindrical tube (e.g. capillary tube with surface tension) having an equilibrium pressure and a constant area, the liquid surface is formed in the direction of gravity by the vertical surface tension, so that the weight of the liquid droplet (Wg) is greater than the vertical surface tension (Fg). The process of converting the weight of the falling liquid into a volume after calculating the weight of the falling liquid by the relation that the weight of the falling liquid (Wg) is equal to the vertical surface tension (Fg) of the liquid using the principle of free fall in the direction of gravity. And it provides a method for calculating the total flow rate of the falling liquid droplets by the process of counting the number of the falling liquid droplets.

That is, [Equation 1] below to calculate the weight (Wg) of the drop liquid drop and [Equation 2] below to calculate the vertical surface tension (Fg) of the drop liquid drop below [Equation 2] Fluid dynamics as shown in

[Equation 1]

Wg = γhS = γhπd² / 4 [g / cm 3]

[Equation 2]

Fg = σπd. cosθ (dyne)

&Quot; (3) "

Wg = γhS = γhπd² / 4 = Fg = σπd. cosθ [dyne / cm]

   γ: unit weight of fluid with temperature (20 ° C = 71.32 for water)

   σ: surface tension of the fluid with temperature = γhd / 4cosθ (20 ° C = 0.998 for water)

   θ: surface tension contact angle (water and glass θ = 8 ~ 9 °, cos9 = 0.987)

    Wcc: volume of water (20 ° C. = 0.998 g / cm 3; cc)

    h: fluid surface tension vertical component

    S: area of cylindrical tube

    d: diameter of cylindrical tube

    1 g of = 980 dyne

Calculating the weight (Wg) of the drop liquid drop by the fluid dynamic equation such as [Equation 3] and then changing the weight of the drop liquid drop by volume;

Counting the number of drop liquid drops; It is to calculate the total flow rate of the drop liquid drop by.

As an example of the flow measurement method of the present invention, the flow rate of the falling liquid droplet which freely supplies water at 20 ° C. by the vertical surface tension through a cylindrical tube having an equilibrium pressure and a surface area of 1 mm 2 is supplied. The measurement is as follows.

&Quot; (3) "

Wg = γhS = γhπd² / 4 = Fg = σπd. cosθ [dyne / cm]

First, when the weight (Wg) of the drop liquid drop is calculated by [Equation 3] defined above, the weight (Wg) of the drop liquid drop is calculated as 22.35 [g.dyne.cm 3], and the weight of the drop liquid drop is calculated. In terms of the weight applied to gravity, the weight of the drop liquid drop (Wg) is in 0.0228g, when the weight of the drop liquid (Wg) in terms of 20 ℃ water volume, the volume of the drop liquid drop is 0.0228 calculated as cc.

Thus, since the number of liquid drops dropped and supplied to the volume of the falling liquid droplets is counted, the total flow rate supplied by the drop is calculated.

On the other hand, as an example of the flow measurement method of the present invention as described above, the liquid weight (Wg) in the state where the water of 20 ° C has a surface area of 1 cm² is calculated as follows by the formula (3) defined above.

Wg = γhS = γhπd² / 4 = Fg = σπd. cosθ = 3.14 × 71.32

            γ: unit weight of fluid with temperature (20 ° C = 71.32 for water)

            θ: surface tension contact angle (water and glass θ = 8-9 °)

            σ: surface tension of the fluid with temperature (20 ° C = 0.998 for water)

By counting the number of supply of the unit liquid droplets to the flow rate of the unit liquid droplets calculated as above, it is possible to precisely measure the total fluid supplied through the cylindrical tube.

Next, a control system for controlling the dose of the liquid by using the flow rate value calculated by the flow rate measurement method using the vertical surface tension of the present invention will be described in detail with reference to FIGS. 1 to 2.

A liquid storage pack (1) for storing a liquid such as Ringer's liquid, and a drop chamber (2) for dropping the liquid in the liquid storage pack through a cylindrical tube (3) and supplying the liquid to the lower connection hose (4); A liquid drop detector 5 for detecting a liquid drop dropped from the drop chamber 2 and a connecting hose 4 by the microcomputer 6 according to the dose of the liquid drop detected by the detector; Dosage controller (7) for adjusting the dose of the liquid supplied,

The cylindrical tube 3 is formed in the form of a capillary tube having a vertical surface tension by the equilibrium pressure and a predetermined area,

The microcomputer 6 measures the flow rate and the drop period of the drop of liquid supplied drop by detecting the number of the unit liquid drop supplied from the cylindrical tube 3 by the vertical surface tension by the sensor (5) An input unit 11, a comparison unit 12 which compares the total dose set by the user and the dose per unit time with respect to the flow rate and the dropping period of the liquid droplets measured and input by the measurement input unit, and the comparison unit. It consists of a control unit 14 for controlling to adjust the dose of the liquid supplied through the connection hose by opening and closing the dose regulator by the set value.

At this time, the microcomputer 6 is a display unit for displaying the current liquid dosage, administration status, administration failure status and the like by the value input by the measurement input unit 11 and the value compared in the comparison unit 12 through the display window 15 and the alarm unit 16 for alarming an emergency situation, such as a dispensing disorder state is made.

In addition, the flow rate of the liquid droplets measured and input by the measurement input unit 11 of the microcomputer 6 is such that the liquid droplets are formed in the direction of gravity by the vertical surface tension in the cylindrical tube, so that the weight of the liquid droplets (Wg) is greater than the vertical surface tension (Fg). The weight of the drop (Wg) is equal to the vertical surface tension (Fg) of the drop by using the principle of free fall in the direction of gravity, when

Wg = γhS = γhπd² / 4 = Fg = σπd. cosθ [dyne / cm]

By calculating the weight of the falling liquid drop by the number of the liquid drop to the value converted into the volume is to calculate the flow rate of the liquid drop.

In other words, the flow rate value of the droplet measured by the flow rate measuring method using the vertical surface tension of the present invention is measured and input.

In addition, the liquid drop detector 5 detects a change in capacitance when a liquid droplet passes between an infrared transceiver, a light generator and a light sensor, an infrared light generator and a light sensor, and two plates (a type of capacitor). Of course, it is possible to apply a variety of methods for detecting the liquid droplets passing through the drip chamber using the optical fiber.

The dose controller 7 may be applied in various forms, but as shown in FIGS. 3 and 4, the rod is tightened to the interlocking gear 22 engaged with the driving gear 21 driven by the driving motor M. Screw (25) to move back and forth,

The gripping portion 26 formed in the shape of a hook at the tip of the tightening rod 25 is configured to adjust the cross-sectional size of the pulled hose 4 so as to adjust the liquid dosage per unit time.

At this time, the connection hose 4 forms a bending portion 28, which is "S" shaped bending the upper and lower portions of the tightening rod 25, and insert the tightening table 29 to the inner side of the bending portion, respectively, the tightening The rod 25 is configured to adjust the cross-sectional size by pressing and relaxing the connecting hose 4 by pulling and relaxing the connecting hose.

As an unexplained symbol, 30 represents a support.

Next will be described the operation and action of the present invention described above.

First, the user selectively inputs the type of liquid, total dosage, administration time, and dosage per unit time to the microcomputer 6 through a separate input device, and operates on.

The control unit 13 of the microcomputer 6 opens the connection hose 4 connected to the drip chamber by operating the drive motor M of the initial dose regulator 7.

In this state, a liquid such as Ringer's liquid of the liquid storage pack 1 is dropped and supplied in the form of a liquid drop through the cylindrical tube 3 having the vertical surface tension by the equilibrium pressure and a predetermined area.

At this time, the number of liquid droplets dropped from the cylindrical tube 3 by the sensor 5 outside the drop chamber 2 is detected and input to the measurement input unit 11 of the microcomputer 6.

The measurement input unit 11 measures the flow rate and the drop period of the liquid drop supplied drop.

That is, the weight of the unit liquid droplet is calculated and converted into a volume based on the information of the liquid previously input to the microcomputer 6 and the information of the circular tube 3, and then considering the number of liquid droplets detected by the detector. It is to measure the flow rate and the drop period of the total liquid droplets.

In particular, the flow rate of the total liquid droplets is free in the direction of gravity when the liquid droplets are formed in the gravity direction by the vertical surface tension in the cylindrical tube 3 and the weight (Wg) of the liquid droplets becomes larger than the vertical surface tension (Fg). Using the falling principle, the weight of the drop (Wg) is equal to the vertical surface tension (Fg) of the drop.

Wg = γhS = γhπd² / 4 = Fg = σπd. cosθ [dyne / cm]

   γ: unit weight of fluid with temperature (20 ° C = 71.32 for water)

   σ: surface tension of the fluid with temperature = γhd / 4cosθ (20 ° C = 0.998 for water)

   θ: surface tension contact angle (water and glass θ = 8 ~ 9 °, cos9 = 0.987)

    Wcc: volume of water (20 ° C. = 0.998 g / cm 3; cc)

    h: fluid surface tension vertical component

    S: area of cylindrical tube

    d: diameter of cylindrical tube

    1 g of = 980 dyne

Since the number of liquid droplets is taken into account by calculating the weight of the falling liquid droplets and converting them into volume, it is possible to perform precise measurement unlike in the prior art.

In this way, the flow rate and drop period of the drop liquid droplets measured by the measurement input unit 11 of the microcomputer 6 are compared with the total dosage, administration time, and dosage per unit time set by the user in the comparison unit 12. By controlling the dose controller 7 by the control unit 13 will be controlled.

That is, when the current total amount is set and the current measured amount is compared, the presently measured amount is in a state of being administered.

In the case of a dispensing state in which the current measurand is measured equally or the dosage disorder in which the current measurand is measured as 0 by comparing the set total dose with the present measurand, the supply is blocked by the dose controller 7 Will end.

In addition, when comparing the set dose per unit time and the current measurement, the normal time operation is performed when the unit time step set dose and the current measurement amount are the same, and therefore, the process proceeds to comparing the set total dose and the current measure amount again. Become,

If the set dose per unit time and the current measured amount is different, the dose controller 7 is fine-opened and controlled, and then the process proceeds to comparing the set total dose with the current measured amount.

That is, when the current measurement amount is smaller than the set hourly dose, the dose controller 7 is finely opened, and when the current measurement amount is large, the dose controller 7 is finely closed.

In addition, when the current measurement amount is 0 for the set hourly dose, the dosing state is interrupted, so that the supply is blocked by the dose controller 7 and the dosing operation is terminated.

In the administration process as described above, the situation such as the real-time dose, the intermediate dose or the completion of the administration, administration disorders, etc. are displayed through the display window of the separate display unit 15 as well as alarm operation to check each situation in the alarm unit 16 You can, but not only the user but also remotely managed.

As described above, the administration of the total dose and the dosage per unit time is completed, and the administration is completed by closing the dose controller 7.

Therefore, the present invention is to ensure the convenience and reliability of the user, since the control operation to maintain a constant total dose, dosage per unit time, etc., even when the administration operation is normal, as well as changes in the user's movement or other administration environment.

Furthermore, the present invention provides a more efficient opening and closing operation of the dose controller 7 by the control unit, which is interlocked with the drive gear 21 driven by the drive motor M. While rotating in reverse, the tightening rod 25 is moved back and forth to control.

That is, the grip portion 26 formed in the shape of the hook of the end of the tightening rod 25 is to adjust the cross-sectional size while pulling the connecting hose 4, the connecting hose is "S" up and down of the tightening rod 25 &Quot; The band is mounted to form a bent portion 28, and the clamping rod 29 is inserted into each of the bending portions. ), The dosage is controlled by adjusting the cross-sectional size while pressing and relaxing.

1 is a block diagram showing an entire system of the present invention.

2 is an operational flowchart of the present invention.

3 and 4 are plan and front views of the present invention dose regulator.

** Description of the symbols for the main parts of the drawings **

1: liquid storage pack 2: drip chamber

3: cylindrical tube 4: connecting hose

5: droplet detector 6: micom

7: Dose controller 11: meter input

12: comparison unit 14: control unit

21: drive gear 22: interlocking gear

25: Clamping rod 26: Gripping portion

29: captive

Claims (6)

Using the principle of free fall in the direction of gravity when a liquid drop is formed in the direction of gravity due to the vertical surface tension in a cylindrical tube having an equilibrium pressure and a constant area, and the weight (Wg) of the liquid drop is greater than the vertical surface tension (Fg). The weight of the drop liquid drop (Wg) is the process of converting the weight of the drop liquid volume to the volume after calculating the weight of the drop liquid by the relationship established equal to the vertical surface tension (Fg) of the liquid drop, And calculating the total flow rate of the falling liquid droplets by counting the number of the falling liquid droplets. The method of claim 1, The process of calculating the weight (Wg) of the drop liquid drop, A hydrodynamic equation in which the weight (Wg) of the falling liquid drop is equal to the vertical surface tension (Fg) of the liquid drop, Wg = γhS = γhπd² / 4 = Fg = σπd. cosθ [dyne / cm]    γ: unit weight of fluid with temperature (20 ° C = 71.32 for water)    σ: surface tension of the fluid with temperature = γhd / 4cosθ (20 ° C = 0.998 for water)    θ: surface tension contact angle (water and glass θ = 8 ~ 9 °, cos9 = 0.987)     Wcc: volume of water (20 ° C. = 0.998 g / cm 3; cc)     h: fluid surface tension vertical component     S: area of cylindrical tube     d: diameter of cylindrical tube     1 g of = 980 dyne The flow rate measuring method using the vertical surface tension, characterized in that for calculating the weight (Wg) of the drop liquid drop. A liquid storage pack (1) for storing a liquid such as Ringer's liquid, a drop chamber (2) for dropping the liquid in the liquid storage pack through a cylindrical tube (3) and supplying it to the lower connection hose (4); The liquid drop detector 5 which detects the liquid drop dropped and supplied from the drop chamber 2, and is supplied through the connecting hose 4 by the microcomputer 6 according to the dosage of the liquid drop detected by the detector. In the liquid dosage control system consisting of a dosage controller (7) for adjusting the dosage of the liquid to be made, The cylindrical tube 3 is formed in the form of a capillary tube having a vertical surface tension by the equilibrium pressure and a predetermined area, The microcomputer 6 measures the flow rate and the drop period of the drop of liquid supplied drop by detecting the number of the unit liquid drop supplied from the cylindrical tube 3 by the vertical surface tension by the sensor (5) In the input unit 11, a comparison unit 12 for comparing the total dose set by the user and the dosage per unit time with respect to the flow rate and the drop period of the liquid droplets measured by the measurement input unit, and in the comparison unit And a control unit (14) for controlling to adjust the dose of the liquid supplied through the connection hose by opening and closing the dose controller by the compared value. The method of claim 3, The microcomputer 6 displays a current liquid dosage amount, administration state, or administration disability state, etc. through a display window, based on the value input by the measurement input unit 11 and the value compared by the comparison unit 12. And an alarm unit (16) for alarming an emergency situation such as an administration disorder state. The method of claim 3, The dose controller 7 is coupled to the drive rod (21) driven by the drive gear 21 and the interlocking gear 22 meshed with the drive rod (22) so as to move back and forth, The liquid dosage control system, characterized in that the grip portion 26 formed in the shape of a hook at the tip of the tightening rod 25 adjusts the cross-sectional size of the pulled hose 4 so as to adjust the liquid dosage per unit time. . The method of claim 5, The connecting hose 4 forms a bending portion 28 that is “S” shaped bent up and down of the tightening rod 25, and inserts a tightening rod 29 into each of the inside of the bending portion to install the tightening rod ( 25) The liquid dosage control system, characterized in that the tightening table is configured to pressurize and relax the connecting hose (4) to adjust the cross-sectional size by pulling and relaxing the connecting hose.

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