KR100728527B1 - Intravenous infusion apparatus - Google Patents

Abstract

An intravenous infusion apparatus is provided to prevent the risk of backflow of blood regardless of the positions of the intravenous infusion bag and the patient's heart and to inject the intravenous infusion stably. The intravenous infusion apparatus has an intravenous infusion bag container(10) which pressurizes an intravenous infusion bag(20) with its own internal pressure. The intravenous infusion container(10) is connected to an air pump(50). An air pressure sensor(48) and a solenoid valve(43) are installed on an air supply conduit(90) between the intravenous infusion bag container(10) and the air pump(50). A control portion is provided to control the valve(43) and the air pump(50) according to the internal pressure of the intravenous infusion bag container(10) detected by the air pressure detection sensor(48) to make the internal pressure of the intravenous infusion bag container(10) maintained to be a reference pressure.

Description

Infusion apparatus {Intravenous infusion apparatus}

1 is a view showing the configuration of the infusion syringe according to the present invention;

2 is a view showing the control flow of the control unit in the infusion syringe according to the present invention;

3 is a view showing a case where a sap bag container that is a precision chamber is provided according to the present invention;

4 is a view showing a control flow of the control unit to compensate for the pressure according to the pressure head change to maintain a constant amount of infusion per unit time;

5 and 6 are views showing another configuration example for compensating for the change in the amount of infusion per unit time according to the pressure head change;

7 is a view showing an example of the infusion machine according to the present invention installed on the belt or backpack; And

8 is a view showing an example in which the user wears the infusion machine according to the present invention in the form of a belt.

<Description of Major Symbols in Drawing>

10: sap bag container 20: sap bag

50: air pump 90: air supply line

48: air pressure sensor 43: solenoid valve

80: microprocessor 5: infusion tube

The present invention relates to an infusion injector, and more particularly, to an infusion injector that can be easily moved to a portable and stable infusion of the sap irrespective of the height change of the sap bag.

In general, the administration of the sap depends on gravity, and for this purpose, the sap bag is placed at a position higher than the heart of the patient using a hanger or the like, and the sap of the sap bag is administered to the patient by the height difference. In this case, the vertical height between the sap bag and the patient's heart should be maintained at an average of about 80 cm so that the sap can be stably injected without the risk of blood backflow.

Therefore, it is inconvenient to infuse fluid in this way depending on gravity. Patients or caregivers should always make efforts to maintain the proper height of the sap bag, and use a hanger or the like to accompany the sap bag when moving. As you listen, the difficulty is to make sure that the height is maintained at the proper height.

Therefore, regardless of the location between the sap bag and the patient's heart in relation to the infusion of the sap bag, there is no fear of blood backflow at all times, and the infusion rate is constant so that the sap can be administered stably. A sap injector is required to move comfortably alone.

The present invention satisfies the above request. Therefore, the object of the present invention, regardless of the position between the sap bag and the patient's heart, there is no concern of blood backflow at all times, and the infusion rate of the sap is constant so that the sap can be administered stably. It is to provide an infusion machine that can be moved comfortably alone.

The sap injector according to the object of the present invention is provided with a sap bag inside, the sap bag container for pressurizing the sap bag with an internal pressure; An air pump connected through the fluid bag container and an air supply line; An air pressure sensor installed in the air supply line between the fluid bag container and the air pump to sense a pressure of air in the fluid bag container; A valve installed in the air supply line between the fluid bag container and the air pump; A control unit connected to the air pressure sensor and controlling the valve and the air pump according to the pressure inside the infusion bag container sensed by the air pressure sensor to control the internal pressure of the infusion bag container to maintain a reference pressure. Characterized in that made.

In an embodiment of the present invention, the control unit includes: an internal pressure determining means for determining whether the internal pressure of the infusion bag container sensed by the air pressure sensor reaches a reference pressure; A sap bag container internal pressure increasing means for opening the valve and operating an air pump to increase the internal pressure when the internal pressure is smaller than the reference pressure as a result of judging by the container internal pressure judging means; And a sap bag container internal pressure increase-stop means for stopping the increase of the internal pressure by closing the valve and stopping the operation of the air pump when the internal pressure reaches the reference pressure as a result of judging by the container internal pressure determining means. It is preferable.

In addition, in the embodiment of the present invention, the infusion bag container is preferably an air bag that can be expanded and contracted according to the pressure change therein.

According to the invention, the sap bag container is a static chamber; The control unit includes: a pressure change rate storage means at a reference position for storing a pressure change rate with time inside the sap bag container at a reference position; Pressure change rate measuring means for measuring a pressure change rate inside the sap bag container; Pressure change rate comparing means for comparing the pressure change rate at the reference position with the pressure change rate inside the container measured by the pressure change rate measuring means; Pressure reducing means for reducing the pressure inside the container by opening the valve when the rate of change of pressure inside the fluid bag container is greater than the rate of change of pressure at the reference position; As a result of the comparison of the pressure change rate comparing means, the pressure increase means for opening the valve and operating the air pump to increase the pressure inside the container when the pressure change rate inside the fluid bag container is smaller than the pressure change rate at the reference position. It is preferable that the pressure compensation means according to the height change of the sap bag made of a further comprising.

In an embodiment of the present invention, the inside of the infusion bag container may be provided with an airbag connected to the air supply line as being in contact with the infusion bag.

In other cases, the infusion pipe pressure sensor is installed in the infusion pipe, and the control unit of the infusion bag for controlling the valve and the air pump to maintain a constant pressure difference between the air pressure sensor and the infusion fluid pressure sensor It may further have a pressure compensation means according to the height change.

In another case, an infusion pipe sensor is installed in the infusion pipe, and the control unit controls the valve and the air pump so that the infusion flow rate detected through the infusion flow sensor is maintained according to the height change of the infusion bag. It may further have a means for compensating for the pressure difference.

In the present invention, the infusion injector is installed on the belt or backpack, the user can simply wear through these belt or backpack.

Sap injector according to the present invention is preferably installed in the infusion tube connected to the hundreds and hundreds more preferably has an infusion dose controller for adjusting the infusion amount.

Embodiments of the present invention will now be described with reference to the accompanying drawings.

1 is a view showing the configuration of the infusion syringe 100 according to the present invention.

As shown, the infusion injector 100 according to the present invention has a infusion bag 20 is provided therein has a infusion bag container 10 for pressurizing the infusion bag 20 at its internal pressure, the infusion bag The container 10 is connected to the air pump 50 through the air supply line 90. The air supply line 90 may be formed, for example, in the form of a tube.

An air pressure sensor 48 is installed in the air supply line 90 between the fluid bag container 10 and the air pump 50 to detect the pressure of the air inside the fluid bag container 10, and The solenoid valve 43 is installed in the air supply line 90 between the infusion bag container 10 and the air pump 50, and between the air pump 50 and the infusion bag container 10. Open or close.

The infusion bag 20 inside the container 10 is connected to an infusion tube 5, and the infusion tube 5 is provided with an infusion needle 8 at its end.

The infusion pipe (5) may be installed with the infusion injection controller 30 to adjust the amount of infusion. The infusion amount controller 30 is a micro-channel is formed therein and by adjusting the length of passage of the tube to enable the injection of a certain amount of the fluid is already disclosed in various forms. For example, the same as the drug solution injection amount control device of the Republic of Korea Utility Model Registration No. 20-0265972 can be used.

The air pressure sensor 48, the valve 43, and the air pump 50 are connected to a microprocessor 80, and the microprocessor 80 is a fluid bag container sensed by the air pressure sensor 48. 10, the valve 43 and the air pump 50 are controlled according to the internal pressure to control the internal pressure of the infusion bag container 10 to maintain the reference pressure.

The sap bag 20 is installed inside the sap bag container 10 to receive the internal pressure of the sap bag container 10, and accordingly, the inner pressure of the sap bag container 10 is the sap. It becomes the pressure which presses the bag 20.

Therefore, according to the present invention, since the pressure in the sap bag container 10 can be adjusted under the control of the microprocessor 80, the sap is constantly supplied regardless of the height of the sap bag 20 It becomes possible. That is, since a certain pressure is pressed against the sap bag 20, the sap inside the sap bag 20 is constantly discharged by this pressing force. In particular, in this case, the infusion is administered to the patient through the infusion controller 30 to maintain the constant supply.

Typically, the typical infusion dose controller 30 is designed based on the pressure of about 1.08 atm is applied to the input end. Therefore, the internal pressure (reference pressure) of the infusion bag container 10, which is controlled and kept constant by the microprocessor 80, pressurizes the infusion bag 20 so that the input end of the infusion controller 30 is supplied. It is desirable to set the pressure at which a pressure of about 1.08 atm can be formed.

According to the present invention, the infusion bag container 10 is preferably made of a synthetic resin material in the form of an air bag that can be expanded and contracted according to the pressure change therein.

2 is an example showing the control flow of the microprocessor 80 according to the present invention.

Initially, the microprocessor 80 opens the valve 43 and operates the air pump 50. (Step S201)

Accordingly, the internal pressure of the fluid bag container 10 is increased, and the microprocessor 80 senses the pressure inside the fluid bag container 10 through the air pressure sensor 48 (step S202). It is determined whether or not the pressure has reached the set reference pressure P. (Step S203)

If the pressure inside the infusion bag container 10 reaches the reference pressure, the valve 43 is closed and the operation of the air pump 50 is stopped (step S204), otherwise, the above-described control flow Repeat to reach the reference pressure.

As such, the present invention provides a sap bag container 10 and maintains the pressure therein at a reference pressure capable of supplying a stable sap, so that the sap bag 20 therein receives the reference pressure and thus stably. The sap is to be supplied, and at this time, a predetermined amount of sap is to be supplied via the sap injection amount adjusting device 30.

The present invention also prevents the change of the amount of infusion per unit time caused by the change of the height of the sap bag so that the sap can be administered to the patient more stably.

That is, when the sap bag 20 is changed in height, a pressure head is issued according to the height change, which affects the amount of infusion per unit time. The present invention compensates for the change in the amount of infusion per unit time according to the height change of the sap bag 20 so that the amount of infusion per unit time is kept constant.

To this end, in the present invention, a constant volume chamber 105 is first provided as the sap bag container 10. (See Figure 3)

When the fluid bag 20 is installed in the static chamber 105, the volume Vc of pure air in the static chamber 105 is linked with the volume Vg of the fluid bag 20. That is, the volume Vg of the sap bag 20 decreases or increases corresponding to the increase or decrease of the air volume Vc of the static chamber 105, respectively.

In particular, since the air volume Vc and its internal pressure Pc in the static chamber 105 are kept constant according to Boyle's law, the fluid bag 20 therein in the static chamber 10 is concluded. The change ΔVg of the capacitance corresponds to the change in its internal pressure Pc.

Therefore, if the change in pressure change rate with time of the static chamber internal pressure Pc is kept constant, this means that the volume change rate with time of the sap bag 20 is kept constant, and thus, the amount of sap per unit time is maintained. This means that the flow rate remains constant.

Accordingly, the present invention, when the pressure head occurs in accordance with the change in the height of the sap bag 20, the change in pressure change rate due to the effect, to recognize this to compensate for the pressure change rate. Specifically, when a reference position is set and a height change occurs with respect to the reference position based on the air pressure change rate, which is an internal pressure of the fluid bag container 105 which is a static chamber, with respect to the reference position, a pressure change occurs. The compensation is made to maintain the rate of change of pressure at the reference position. As a result, the volume change rate of the infusion bag 20 in the infusion bag container 105, which is a static chamber, is kept constant, and thus, a predetermined amount per unit time. Infusion of sap is to be.

Referring to FIG. 3, as in FIG. 3A, a sap back container 105 that is a static chamber is provided, and a sap bag 20 is provided therein.

In other cases, an air bag 108 connected to the air supply line 90 may be provided inside the fluid bag container 10, which is a static chamber, and the air bag 108 may be in contact with the fluid bag 20. Then, the pressure inside the airbag 108 will form the internal pressure Pc of the fluid bag container 10 described above. 3 (b) shows such an example, in which two airbags 108 are in contact with both sides of the fluid bag 20 inside the fluid bag container 10, which is the static chamber, and air for each air bag. Separation lines 91 and 93 branched from the supply line 90 are connected.

4 shows the control flow of the microprocessor 80 to compensate for head pressure.

First, the rate of change of the air pressure (or internal pressure) of the infusion bag container 105 according to the change of time with respect to the reference position is measured and stored. (Step S401)

The rate of change of the air pressure of the fluid bag container 105 at the reference position can be measured and set in advance, and in other cases, the value can be measured and stored at the position designated by the patient as the reference position. That is, while wearing the sap injector 100 according to the present invention with a belt or a backpack to be described later, to inform the microprocessor 80 to a specific position to the reference position and then the microprocessor 80 of the infusion bag container 105 at that position Measure and remember the rate of change of air pressure.

Next, the microprocessor 80 measures the rate of change of the air pressure of the fluid bag container 105 at the position of the current fluid bag 20. (Step S402)

Next, the microprocessor 80 determines whether the measured rate of change of the air pressure of the sap bag container 105 matches the rate of change of the air pressure of the sap bag container 105 at the reference position. (Step S403) If they match, it means that there is no change in the reference position, and compensation is not necessary.

If the rate of change of the air pressure of the sap bag container 105 at the current position is larger than the rate of change of the air pressure of the sap bag container 105 at the reference position (step S404), this is a case where the current position is higher than the reference position. Since a positive head is generated, the microprocessor 80 opens the valve 43 to reduce its air pressure. (Step S405)

If the rate of change of the air pressure of the sap bag container 105 at the current position is smaller than the rate of change of the air pressure of the sap bag container 105 at the reference position (step S404), this is a case where the current position is lower than the reference position. Since a negative head is generated, the microprocessor 80 opens the valve 43 and operates the air pump to increase its air pressure. (Step S406)

In this way, the present invention can maintain the change in the amount of infusion per unit time due to the generation of chickenpox according to the height change of the sap bag.

In other cases, as shown in Figure 5, the infusion tube 5 is the infusion pressure sensor 38 is installed, the microprocessor 80 is the air pressure sensor 48 and the fluid inlet pressure By controlling the valve 43 and the air pump 50 to maintain a constant pressure difference of the sensor 38, it is possible to compensate for the change in the amount of fluid input per unit time due to the generation of head caused by the change of the height of the fluid bag. .

In another case, as shown in FIG. 6, the infusion tube 5 is provided with a fluid flow sensor 28, and the microprocessor 80 receives an fluid per unit time detected through the fluid flow sensor 28. The valve 43 and the air pump 50 may be controlled to maintain a constant injection flow rate.

The infusion device 100 according to the present invention is installed on the belt 200 or backpack 300, the user can easily wear through these belt 200 or backpack 300. FIG. 7 shows an example of such a case, and FIG. 8 shows a case where a patient wears a belt.

As described above, the present invention is not concerned about blood flow at all times regardless of the position between the sap bag and the patient's heart, and the infusion rate of the sap is constant so that the sap can be administered stably. Provide an infusion syringe that can be moved easily.

Specifically, the present invention enables the supply of sap stably regardless of whether the sap bag is changed in height, and also compensates the supply amount of sap due to the occurrence of head pressure due to the height change of the sap bag. The input is made possible. In addition, the infusion injector according to the present invention can be worn in the form of a belt or backpack, the patient can move comfortably after wearing.

It will be appreciated that this has been achieved the object of the present invention.

Although the present invention has been described with reference to the embodiments, the present invention is not limited thereto, and the scope of the present invention is defined by the following claims according to the spirit of the present invention.

Claims (10)

A sap bag container provided therein to press the sap bag with an internal pressure; An air pump connected through the fluid bag container and an air supply line; An air pressure sensor installed in the air supply line between the fluid bag container and the air pump to sense a pressure of air in the fluid bag container; A valve installed in the air supply line between the fluid bag container and the air pump; A control unit for measuring the pressure inside the infusion bag container through the air pressure sensor and compares it with a set reference pressure to control the valve and the air pump to control the internal pressure of the infusion bag container to maintain the reference pressure Branch in the infusion machine, (a) the sap bag container is a static chamber; (b) the controller is (b1) pressure change rate storage means at a reference position for storing a pressure change rate with time inside said fluid bag container at a reference position; (b2) pressure change rate measuring means for measuring a pressure change rate with time inside the sap bag container; (b3) pressure change rate comparing means for comparing the rate of change of pressure at the reference position with the rate of change of pressure inside the container measured by the pressure change rate measuring means; (b4) pressure reduction means for reducing the pressure in the container by opening the valve when the rate of change of pressure inside the fluid bag container is greater than the rate of change of pressure at the reference position; and (b5) comparing the pressure change rate comparing means to open the valve and operate the air pump to increase the pressure inside the container when the pressure change rate inside the fluid bag container is smaller than the pressure change rate at the reference position. Sap injector, characterized in that it has a pressure increasing means. delete delete The method of claim 1, Sap injector, which is installed in the infusion tube connected to the sap bag further has a sap injection amount regulator for adjusting the amount of infusion. delete The method of claim 1, The fluid injector of the fluid bag container is provided in contact with the fluid bag is connected to the air supply line is provided. delete delete The method according to claim 1 or 6, The infusion injector is installed on the belt or backpack, the infusion injector, characterized in that the user can easily wear through the belt or backpack. The method of claim 6, Sap injector, which is installed in the infusion tube connected to the sap bag further has a sap injection amount regulator for adjusting the amount of infusion.

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