KR20170027358A

KR20170027358A - Intravenous delivery device

Info

Publication number: KR20170027358A
Application number: KR1020150123612A
Authority: KR
Inventors: 장관순
Original assignee: 장관순
Priority date: 2015-09-01
Filing date: 2015-09-01
Publication date: 2017-03-10
Also published as: KR101738252B1

Abstract

The present invention relates to an intravenous injection liquid supply apparatus which automatically extrudes and injects a certain amount of artificial fluid at a predetermined time interval irrespective of the position of a fluid bag,
Usually, the fluid bag needs to be kept higher than the human body during the infusion of fluid, and the infusion volume is controlled by a roller clamp-type fluid controller depending on the user's senses or the amount of fluid is controlled by a complicated mechanical device,
In the present invention, a suction tube, an extruder tube and a choke body are provided in an elastic tube and a certain amount of liquid is discharged by pushing the elastic tube between the reverse tube and the motor drive means from the outside, A pressure sensor is installed in close contact with the outer surface of the elastic tube between the choke body and the choke body so that the pressure to be extruded is detected in real time to detect whether the liquid is normally supplied or air bubbles in the liquid are not mixed, And controls and warns the motor in accordance with the control signal.

Description

[0001] INTRAVENOUS DELIVERY DEVICE [0002]

The present invention relates to an intravenous injection device for extruding a predetermined amount of a fluid at a predetermined time interval artificially irrespective of the position of a fluid bag,

Usually, the fluid bag needs to be kept higher than the human body during the infusion of fluid, and the infusion volume is controlled by a roller clamp-type fluid controller depending on the user's senses or the amount of fluid is controlled by a complicated mechanical device,

In the present invention, a suction tube, an extruder tube and a choke body are provided in an elastic tube and a certain amount of liquid is discharged by pushing the elastic tube between the reverse tube and the motor drive means from the outside, A pressure sensor is installed in close contact with the outer surface of the elastic tube between the choke body and the choke main body so that the pressure at the time of extrusion can be detected in real time to detect whether the liquid is normally supplied or air bubbles in the liquid are not mixed, It is an intravenous fluid supply device that controls and alerts the motor according to the result.

The present invention extrudes and injects a certain amount of liquid at a predetermined time interval, irrespective of the height of the liquid bag, regardless of the height of the liquid bag, and simultaneously detects whether the liquid is normally supplied or air bubbles in the liquid are introduced into the microcontroller. And to control the motor driving means according to the result.

First, in order to obtain a proper pressure, it is known that the vertical height between the bag and the patient's heart should be maintained at about 80 cm to stabilize the fluid without risk of blood reflux.

For this purpose, when a patient or a caregiver injects sap using a hanger or the like, the patient or the caregiver should always make an effort to maintain the height of the sap bag at a proper height, and when using the hanger or the caregiver, But it is difficult to keep the height at a proper height while receiving it.

As described above, the pressing means is used to obtain an appropriate pressure,

For example, compressed air or a separate high-pressure gas which can pressurize the liquid bag in the chamber may be used as a power source,

There is a method of diffusing the gas into the piston at a constant speed and using this as a power source to indirectly press the liquid storage container to perform liquid infusion.

Further, the pressing plate is pressed using the restoring force of the coil spring or the screw of the motor to apply pressure to the liquid bag,

There is a method of infusing the infusion bag by pressing the infusion bag by winding the infusion bag on the winding roller using a restoring force of a spring or a motor, and these methods require a separate apparatus and require complicated devices for pressurizing the infusion bag It is necessary.

Second, electronically controlled interlocking pumps and roller pumps are commonly used to control the proper injection rate,

The peristaltic pump drives the separated cam arrays at angularly different angles to sequentially actuate the pressure fingers to produce linear wave motion and move the liquid in the tube by this linear wave motion to release the liquid Lt; / RTI &

The roller type pump is a structure in which a plurality of rollers are in contact with each other on a circumferential tube and rotates to move the liquid in the tube so that liquid is discharged and the liquid is injected. However, since the liquid is supplied by the motor, In the case where continuous control is required and a long time fluid is to be injected, the operation time of the motor is long and the current consumption is large, which is not only inefficient, but also has a problem that it is large in size due to the battery size proportional to the current consumption,

In addition, the drop period of droplets dropping from the dropper is detected by using optical sensor, ultrasonic sensor, vibration sensor, infrared sensor, electrode, etc., and microprocessor technology is applied to drive a separate driving source, Third, separate safety devices for detection of air bubbles and occlusion of the fluid tube must be accompanied.

Background Art [0002] The background art of the present invention is disclosed in Japanese Patent Laid-Open No. 10-1504012.

In order to solve the above-described problems, the present invention relates to a microprocessor technology, which automatically and safely injects a predetermined amount of infusion fluid,

SUMMARY OF THE INVENTION A first object of the present invention is to provide a method of using a liquid storage container (liquid bag)

The second object of the present invention is to provide a compact and low-cost product which can reduce the power consumption by instantaneously repeatedly operating the motor at the input speed without continuously operating the motor as the driving means,

The third object of the present invention is to provide a method of detecting the presence or absence of air bubbles in a fluid by injecting a predetermined amount of fluid at a predetermined time interval, to be.

The construction of the present invention can be roughly classified into a mechanical part and an electrical part. First, a mechanical construction will be described with reference to the drawings.

Figs. 1, 2, and 3 are external views schematically showing the entire configuration of the present invention

Figs. 4 and 5 are perspective views showing a cover opened and attached to the liquid bag 25 according to the present invention. In the present invention, the cam 32 driven by the motor 30 is used to push out the liquid solution as shown in Figs. 7, 8, 9, , The liquid set 20 shown in Fig. 11 is constructed,

The cabin 5 on which the opening and closing device 8 is mounted is provided with an LCD window 6 and a housing chamber 9 for accommodating the power supply means 700. The PCB 4 for controlling the motor 30 Only the location of the placement is shown in Fig.

Fig. 10 is a set of liquids 20 of the present invention.

The insertion needle 21 is elastically inserted into one side of the elastic tube 22 and then the suction backflow 50, the extrusion backflow 60 and the choke body 70 are sequentially inserted into the elastic tube 22 ,

A liquid supply tube 23 having a sap needle 24 coupled thereto is plastically inserted into the outlet of the choke body 70.

The structures of the suction backwash 50, the extruded backwash 60, and the choke body 70 inserted in the elastic tube 22 will be described with reference to FIGS. 11, 12, 13, and 14. FIG.

The structure of the suction backflow 50 will be described as follows.

As shown in Figs. 12 (a) and 12 (b), in the side body 53 having the inlet seat 51 formed with the inlet hole 51 formed therein,

The cap 57 is formed by projecting the projecting portion 54 and piercing the outlet hole 55 and having an annular groove 56 formed on the outer peripheral surface thereof,

In the space between the toilet seat 52 and the protruding portion 54, the side plate 58 is inserted and positioned at the center of the toilet seat 52,

The protruding portion 54 is inserted into the elastic tube 22 at a desired position inside the suction tube 50 and pushed against the elastic ring 59 so that the side plate 58 can naturally come into close contact with the toilet seat 52.

The structure of the extrusion backlash 60 will be described below.

As shown in Figs. 13 (a) and 13 (b), in the side body 63 having the inlet seat 61 formed with the inlet hole 61 formed therein,

The protrusion 64 is projected to puncture the outlet hole 65 and a cap 67 having an annular groove 66 formed thereon is inserted into the outer peripheral surface,

The rotary plate 68 is inserted into the space between the toilet seat 62 and the protrusion 64 to be positioned at the center of the toilet seat 62,

The projecting portion 64 is formed by inserting the extruded retrofit 60 projected so that the rotary plate 68 strongly contacts the toilet seat 62 at a desired position inside the elastic tube 22 and being pushed by the elastic ring 69,

The thickness "T" of the rotary plate 68 used for the extruded backing 60 is thicker than the thickness "t" of the rotary plate 58 used for the suction backlash 50, Tightly against the toilet seat 62 to prevent backflow.

The structure of the choke main body 70 will be described as follows.

An orifice hole 72 having a diameter smaller than that of the choke hole 71 is drilled at the end of the choke 71 and the orifice hole 72 having a diameter significantly smaller than the diameter of the choke hole 71 is drilled at the center of the choke 71, And an annular groove 73 is formed in the elastic tube 22 and inserted into the end of the elastic tube 22,

The pressure of the fluid instantaneously discharged from the extruding backwash 60 expands the elastic tube 22 of the detection section W3 shown in FIG. 11, and then the hydraulic pressure gradually disappears, thereby alleviating the pulsation of the supplied fluid The elastic tube 22 shrinks to the original shape,

As shown in Fig. 15, the pressure sensor 41, which is in contact with the lower surface of the elastic tube 22 in close contact, senses such a change in the water pressure.

The material of the above-described suction backwash 50, the extruded backwash 60 and the chock main body 70 is a type of medical synthetic resin. The elastic tube 22 and the side plates 58, 68 are elastic, It is possible to use a material which is harmless to the human body such as medical silicone or latex which can be used.

6 is a front view of the main body 1 in which the space portion 2 for inserting the liquid receiver 20 and the space portion 3 for inserting the pressure sensor 41 are formed,

7 shows a state in which the pressure plate 40 is pivoted to the shaft 46 fixed with the screw 47 by inserting the liquid receiver 20 and the pressure sensor 41 into the space portions 2 and 3 in FIG. However,

At the other end of the pressure plate 40, a column 42 in which a permanent magnet 43 is embedded is fixed to the left side surface corresponding to the Hall sensor 44. [

8 is a plan view showing a state in which the main plate 10 is engaged with the same shaft 46 to which the pressure plate 40 is attached and the PCB 4 and each component are mounted on the main plate 10, These components will be described as follows.

As shown in Figs. 4, 5, 8 and 9, an "L" type motor fixing plate 33, to which the motor 30 is laterally fixed, is fixed to the main plate 10, 32 are fixed and the cam 32 pushes the pressure plate 40 through the pressing hole 12 so that the motor 30 according to the present invention needs to be downsized and requires a large torque The geared motors are used in combination.

A hole 15 is formed in one end of the fixing plate 33 by drilling the hole sensor hole 14 so as not to be affected by the magnetic field of the permanent magnet 43 and fixing the hall sensor 44 at a position corresponding to the permanent magnet 43 Fixed,

The square hole 13 is drilled so that the column 42 fixed to the pressing plate 40 is moved up and down,

An adjusting bolt 45 for adjusting the upward and downward moving distance of the pressing plate 40 is inserted,

The sealing cap 26 of the liquid bag 25 to which the insertion needle 21 is coupled)

A cover 5 mounted with a PCB 4 and attached with an LCD window 6 is coupled with a hinge 7 in the right empty space of the main board 10.

Second, the electrical configuration will be described with reference to the drawings.

Buttons are mounted on the cover 5 so as to operate various switches on the PCB 4 fixed to the main plate 10 and the LCD window 6 is attached and the power supply means 700 is separately mounted on the lower side of the main body 1 (9).

The intravenous infant supply device of the present invention injects a predetermined amount of infusion into the human body at a constant infusion rate irrespective of the height of the infusion bag and at the same time the infusion, bubble inclusion, fluid exhaustion, It detects the abnormal condition such as malfunction and inputs it to the microcontroller. It controls the driving means according to the result, alarms by LED light or sound, and intermittently drives the motor instantaneously, so that the power consumption can be remarkably reduced. It is free to move and the backflow of blood is not originally possible, and it is an invention that can realize an ultra-low price product with minimal parts composition.

1 is an external perspective view of the present invention.
Fig. 2 is a front view
Fig. 3 is a left side view
Fig. 4 is a perspective view showing a state in which the cover is opened in the state of Fig. 1 of the present invention; Fig.
Fig. 5 is an enlarged perspective view of the main part of Fig.
6 is a front view of the main body of the present invention
FIG. 7 is a plan view showing a state in which a liquid receiver, a pressure sensor, and a pressure plate are mounted on the body of the present invention
Fig. 8 is a plan view showing a state in which the motor is mounted on the main plate in the state of Fig. 7 of the present invention,
Fig. 9 is an enlarged perspective view showing a state in which the main plate and the cover of the present invention are opened. Fig.
10 is a plan view of the liquid set of the present invention
Fig. 11 is an enlarged cross-sectional view showing a set of four steps of the liquid set of the present invention
Fig. 12 is an enlarged cross-sectional view of the suction turbocharger of Fig. 11 of the present invention
(a) shows a normal state diagram
(b) shows the suction state
Fig. 13 is an enlarged cross-sectional view of the extruder of Fig. 11 of the present invention
(a) shows a normal state diagram
(b) shows an extrusion state diagram
Figure 14 is an enlarged cross-sectional view of the choke body of Figure 11 of the present invention
15 is a sectional view showing an operation state of the cam according to the present invention
(a) is a sectional view
(b) is a state sectional view in which the liquid is extruded by the descent of the cam and the pressure sensor detects the extrusion pressure
16 is a state sectional view of a portion for adjusting the discharge amount of the present invention by adjusting bolts
(a) shows a state in which the maximum discharge amount is adjusted
(b) shows the state where the adjustment bolt is lowered to reduce the discharge amount from the maximum
17 is a graph showing changes in the resistance value according to the pressure sensing of the pressure sensor during the extrusion of the present invention
As the indicated graff
(a) shows the steady state state
(b) shows the tube closure state diagram
(c) shows a state in which no pressure is detected
18 is a block diagram of a control block constituting the microcontroller according to the present invention.
Figure 19 is a flow chart of the electrical control portion of the present invention

The liquid-receiving means (A) of the present invention will be described as follows.

11 is an enlarged cross-sectional view of the liquid set 20 of the present invention. The function can be divided into a suction section W1, an extrusion section W2, a detection section W3, and a supply section W4,

The suction section W1 extends from the insertion needle 21 to the side plate 58 of the suction backflow 50,

The extrusion section W2 extends from the side plate 58 of the suction backlash 50 to the side plate 68 of the extrusion backlash 60,

The detection section W3 extends from the side plate 68 of the extrusion counterflow 60 to the end of the choke body 70,

The supply section W4 extends from the distal end of the choke main body 70 to the sap needle 24.

The insertion needle 21 is inserted into the seal cap 26 of the liquid bag 25 and the elastic tube 22 of the extrusion section W2 is repeatedly pressed to discharge the air in the liquid receiver 20, The elastic tube 22 of the extrusion section W2 is repeatedly pressed after the air in the liquid bag 25 is collected toward the sealing cap 26 with the sealing cap 26 of the bag 25 upward, Air in the bag 25 can also be discharged.

When all the air is discharged and the elastic tube 22 of the extrusion section W2 is pressed, the liquid in the extrusion section W2 pushes the rotary plate 68 of the extruded retrofit 60 with water pressure and passes through the detection section W3 And supplies it to the supply section W4,

Upon returning to the elastic tube 22 of the extrusion section W2 that was being pressed, the liquid of the liquid bag 25 is sucked by the restoring force of the elastic tube 22 into the swash plate 58 of the suction swash plate 50, W2).

The extrusion means (B) of the present invention will be described as follows.

7 in which the pressure sensor 41 and the liquid receiver 20 are inserted and the liquid bag 25 and the liquid receiver set 20 are coupled with each other and the main plate 10 on which the motor 30 is mounted, The cam 32 continuously moves the pressure plate 40 up and down by the amount of eccentricity of the cam 32 so that the elastic tube of the extrusion section W2 22 is repeatedly sucked and extruded to discharge all the air in the liquid set 20 and is ready for use.

Thereafter, when the start / stop button 81 is pressed, the motor 30 is operated at a repetition period according to the injection speed, and the cam 32 is repeatedly lifted and lowered to extrude the liquid.

The position detecting means (C) of the present invention will be described as follows.

When the cam 32 is lowered after the motor 30 is driven, the permanent magnet 43 embedded in the left side of the column 42 of the pressing plate 40 is also interlocked and fixed to the position corresponding to the permanent magnet 43 The hall sensor 44 senses that the permanent magnet 43 has been lifted, stops the motor 30, and completes the extrusion once.

The extrusion amount adjusting means (D) of the present invention will be described as follows.

16, the extrusion amount is determined according to the width of the pressure plate 40 and the vertical movement distance "H" or "h" of the pressure plate 40 so that the width of the pressure plate 40 can be made It is possible to achieve a desired object by adjusting the moving distance of the pressure plate 40, which is constant with a predetermined constant at the time when the pressure plate 40 is returned to the upper side, to "H"

16A shows a state in which the pressure plate 40 is in close contact with the cam 32 and the liquid is sucked into the elastic tube 22 in an amount corresponding to the height "H" of the elastic tube 22 of the extrusion section W2. Lt; / RTI >

16 (b) shows a state in which the adjustment bolt 45 is lowered and the adjustment bolt 45 restricts the upward movement of the pressure plate 40, and the liquid is supplied to the elastic tube 22 of the extrusion section W2 at the height " quot; h "of the elastic tube 22, as shown in Fig.

The cam 32 is always operated by the same eccentric amount with the up-and-down movement distance, but the discharge amount is determined as the up-and-down moving distance "H" or "h" of the pressure plate 40,

It is a necessary means for initially setting an extrusion amount of an adult of the present invention or setting a single extrusion amount for a child.

The pressure detecting means (E) of the present invention will be described as follows.

15 (a) is a normal state. In this state, when the cam 32 is lowered as indicated by the arrow in FIG. 15 (b) by driving the motor 30, the liquid is instantaneously discharged by pressing the pressure plate 40, The hydraulic pressure is temporarily raised while passing through the choke hole 71 and the orifice hole 72 of the pressure chamber 70 and the elastic tube 22 of the detection section W3 is pressed against the pressure sensor 41 And the pressure can be measured by the resistance value converted by the pressure sensor 41. The water pressure is gradually reduced by the restoring force of the expanded elastic tube 22 and the resistance value of the pattern as shown in Fig. The state can be indirectly read.

In the normal case, the resistance value is interlocked with the up-and-down movement of the pressure plate 40 as shown in Fig. 17 (a)

If the pressure plate 40 is normally operated but the liquid supply pipe 23 is twisted or the cuff is bent to cause pipe clogging which is not smoothly supplied, the low resistance value state is maintained as shown in FIG. 17 (b)

The elastic tube 22 of the detection section W3 does not generate a hydraulic pressure and is unable to inflate even if the pressure plate 40 normally moves up and down when the liquid is exhausted or air is sucked in the liquid, As shown in (c) of FIG. 17, it is possible to maintain the high resistance value state and to read the resistance value having a different pattern according to each extrusion state, and to detect whether the extrusion is normally performed.

The control means (F) of the present invention will now be described.

Detecting means (100) for detecting in real time the state in which the liquid is injected and whether or not the top dead center is detected;

An input means 200 for inputting a mode setting, a numerical input, a function selection, and the like;

Motor driving means 300 for driving the motor 30 to press the elastic tube 22 of the extrusion section W2;

A microcontroller (400) for controlling the motor driving means (300) according to the input of the detecting means (100) and the input means (200);

Display means (500) for displaying on the LCD window (6) information such as an input result set by the user, an injection progress / result, and an alarm content under the control of the microcontroller (400);

An alarm means (600) for turning on the LED (89) under control of the microcontroller (400) according to the input of the detection means (100) and generating a sound;

A power supply unit 700 for supplying operating power to the microcontroller 400 and each part;

And a communication unit (800) for managing and controlling the microcontroller (400) by a remote computer,

The configuration of the control means (F) will be described in detail as follows.

The configuration of the detection means 100 will be described below.

The pressure state in the elastic tube 22 of the detection section W3 during extrusion is read as a resistance value as shown in Figs. 17A, 17B, and 17C using the pressure sensor 41, (E) for detecting whether or not the air is supplied,

A permanent magnet 43 interlocked with the cam 32 and a hall sensor 44 fixed at a position corresponding to the permanent magnet 43 are provided in a position detecting means C for detecting the top dead center of the pressing plate 40, .

The input means 200 will now be described.

Power switch (80) Turns the equipment ON / OFF.

Start / stop button 81: Starts or stops the intravenous injection device of the present invention.

Reset button (82): Initialize to the value input by pressing after clearing alarm cause.

The rapid charging button 83 is used to discharge the air in the liquid set. When the rapid charging button 83 is depressed, the motor 30 continuously operates regardless of whether the input speed and detection means are detected, And appendage.

A mode button 84, an injection progress mode, an injection amount control mode, an injection speed control mode, and an alarm confirmation mode.

In the injection progress mode, the total injection amount (ml), the injection rate (ml / hr), the injection completion estimated time (min), the operation status of the motor 30, and the remaining amount of battery are displayed.

In the injection amount adjustment mode, the injection amount can be adjusted by the injection amount increase button 85 and the injection amount decrease button 86, and when the mode button 84 is pressed for one second after the adjustment, the injection amount is set by entering the setup mode.

In the injection rate control mode, the injection rate can be adjusted by the injection rate increase button 87 and the injection rate decrease button 88. If the mode button 84 is pressed for one second after the adjustment, the system enters the setup mode, .

The motor driving means 300 will now be described.

And an extrusion means B for repeatedly raising and lowering the cam 32 in conjunction with the motor 30 operating at a repetition cycle according to the injection speed to extrude the liquid.

The display means 500 will be described as follows.

LED 89: Each time the motor 30 is operated, the LED turns on in green, and turns on in response to an alarm.

An LCD window (6); The microcomputer 400 displays the input result, the injection progress state, the remaining battery level, and the alarm content so that the user can confirm the operation state of the present invention.

The alarm means 600 will be described as follows.

The motor 30 continues to be driven and injected beyond the input time,

If the pressure in the detection zone W3 is not detected due to the liquid depletion or bubble mixing,

The pressure of the detection section W3 is not extinguished because the liquid supply tube 23 is twisted or the elbow is folded and the tube is closed with the liquid not exhausted,

The top dead center is not detected even when the motor 30 and the motor 30 inputted with a mechanical defect exceed the operating time,

It is a means of alarming when there is insufficient power.

The communication means 800 will be described below.

It is equipped with a communication means that allows a plurality of devices to be centralized using RF communication, so that a plurality of patients can be managed very efficiently remotely even with a small number of persons.

The present invention having the above-described functions and structure will be described with reference to the flowchart shown in FIG.

Turn on the power switch (S1), turn on the charging button (S2), drive the motor (S3), and add to the fluid set.

When the start / stop switch is depressed (S4), the Hall sensor detects the top dead center (S5), if not the top dead center, drives the motor (S6) and detects the top dead center (S7)

Then, when the top dead center is detected, the period value of the cam according to the input injection speed is calculated and the timer is driven (S8).

If the timer value and the cycle value of the cam coincide with each other (S9), the motor is driven and the LED turns on in green (S10).

At this time, if the motor is continuously driven to be over-injection beyond the input time (S19)

When the pressure is not detected by the pressure sensor (S20)

If the pressure does not disappear and the pressure state is maintained (S20), an alarm is issued (S22) and the process is terminated (S17).

If the top dead center is detected (S11) and the top dead center is detected (S11), the motor is stopped and the LED is turned off (S12) )do.

The total injection amount is calculated by multiplying the total number of times of extrusion by one injection amount (S14)

The total injection amount is displayed on the LCD (S15) to complete one cycle,

When the start / stop switch is pressed (S16), the process is ended (S17)

Until the start / stop switch is pressed, the cycle value is continuously read to drive the timer (S8)

If the input injection amount and the total injection amount match with each other by the periodic drive of the motor (S18), the alarm is made (S22) and the process is terminated (S17).

The functional relationship between the injection speed and the repetition period of the cam will be described as follows.

The set of adult liquids for administering the sap is usually made to be 15 points per 1 ml. The reason for this is that the droplets dropping are checked visually and the infusion rate (ml / hr), the present invention is set to the adjustment bolt 45 so as to be 15 points per 1 ml of the cam.

For example, in the case of glucose, if the repetition period of one point is 4 seconds, the number of points in one hour is 900 points, and the rate of injection is 900 points / hr × 1/15 ml = 60 ml / hr.

That is, when the injection speed of the present invention is inputted at 60 ml / hr, the cyclic repetition period of the cam 32 is automatically adjusted to 4 seconds by the calculation of the microcontroller,

When the injection speed is set to 48 ml / hr, the cyclic repetition period of the cam 32 is automatically adjusted to 5 seconds,

Typically, when the infusion rate of the infant is 15 ml / hr, the repetition period of the cam 32 is automatically adjusted to 16 seconds, and the repetition period can be adjusted by adjusting the discharge amount per cycle of the cam 32 with the adjustment bolt 45 .

1: main body 10: main plate 20: liquid set 22: elastic tube
32: cam 40: pressure plate 41: pressure sensor 43: permanent magnet
44: Hall sensor 45: Adjusting bolt 50: Suction backlash 60: Extruding backlash
70: Choke body
W1: Suction section W2: Extrusion section W3: Detection section W4: Supply section
A: Liquid set means B: Extrusion means C: Position detecting means
D: Extrusion amount adjusting means E: Pressure detecting means F: Control means
100: detecting means 200: input means 300: motor driving means
400: microcontroller 500: display means 600: alarm means
700: power supply means 800; Communication means

Claims

A liquid set 20 consisting of a suction section W1, an extrusion section W2, a detection section W3 and a supply section W4 is inserted into the space section 2 of the main body 1, and,
An extruding means B for pressing the pressure plate 40 to the cam 32 fixed to the motor shaft 31 and pressing the elastic tube 22 of the extrusion section W2,
The column 42 in which the permanent magnet 43 is embedded is fixed to the pressure plate 40 and the hole sensor 44 is fixed to a position corresponding to the permanent magnet 43, Position detecting means C for detecting the top dead center of the pressure plate 40,
An extrusion amount adjusting means D for limiting the movement distance of the pressing plate 40 by limiting the upward movement of the pressing plate 40 by the adjusting bolt 45 inserted into the main plate 10,
Constitutes pressure detecting means (E) for detecting the pressure state of the liquid to be extruded by closely inserting the pressure sensor (41) on the lower surface of the elastic tube (22) of the detection section (W3);
A detecting means (100) composed of the position detecting means (C) and the pressure detecting means (E)
An input unit 200 for inputting the injection amount of the liquid and the injection speed,
Motor driving means 300 including the extrusion means B,
A microcontroller 400 for controlling the motor driving means 300 according to the inputs of the detecting means 100 and the input means 200,
Display means 500 for displaying on the LCD 6 information such as an input result set by a user under the control of the microcontroller 400, an injection progress / result and an alarm content,
An alarm means (600) for alarming an abnormal state of the detection means (100) under the control of the microcontroller (400)
And control means (F) including communication means (800) for allowing the microcontroller (400) to be managed and controlled by a remote computer.

The method according to claim 1,
The suction section W1 between the insertion plates 21 and the side plates 58 of the suction backwash 50,
The extrusion section W2 between the rotary plates 68 of the suction backflow 50 and the rotary plates 68 of the extruded rotary shaft 60,
The detection section W3 between the orifice holes 72 of the choke body 70 and the detection section W2 between the detection needle 24 and the choke body 70 after the orifice hole 72 of the choke body 70, And a supply section (W4).

3. The method of claim 2,
The orifice hole 72 having a diameter smaller than that of the choke hole 71 is punctured and the pressure sensor 41 which is brought into close contact with the lower surface of the elastic tube 22 of the detection section W3 is pressed And the choke body (70).

The method of claim 3,
And detects a non-detection state of the pressure due to fluid depletion or bubble inclusion with the pressure sensor (41).

The method of claim 3,
And the pressure sensor (41) detects a state in which the pressure does not disappear due to the tube clogging.

The method according to claim 1,
It is characterized in that the suction backwashing 50, the extruding backwash 60 and the choke main body 70 are sandwiched by the respective elastic rings 59, 69, 74 at desired positions in the elastic tube 22 Wherein the intravenous infusate supply device comprises: