KR20010004420A - Automatic Dispencing System for Venous Injection - Google Patents

Abstract

PURPOSE: An automatic injection device for providing intravenous infusion dose to patients is useful for the automatical and correct injection of intravenous infusion dose without any particular effort. CONSTITUTION: An automatic dose injection device for providing intravenous infusion comprises an intravenous injector equipped with a duck-neck pump. The device enables the accurate dose and the injection rate of to be achieved by means of an arithmetic and control process with a microcomputer built in a pump driving control. The driving control has a driving source working based on the current heating and contraction movement. The source is noise-free, super light, low power consumptive and runs for a long time even with a portable battery. The device effects the accuracy of intravenous dose and enables the patient to move without other supporting means such as stand or rack.

Description

Medical Dispencing System for Venous Injection

The present invention relates to a medical intravenous fluid injection device. When administering fluid to a patient using a conventional gravity-use intravenous infusion syringe set, the administration speed was controlled by appropriately adjusting the size of the injection tube depending on the experience of the caregiver. Efforts were needed to monitor and control the rate of administration.

In addition, if intravenous fluid is being administered and the patient needs to move to another space (rest room, toilet, etc.), it is very important for the patient or the caregiver because an auxiliary means (sap rest, wall hanging, etc.) is required to maintain a constant gravity in the fluid. It's cumbersome.

The present invention is a device for accurately and automatically administering intravenous fluids without any effort from the caregiver. Therefore, the following technical problems should be solved.

(One). Due to the nature of handling medical drugs, the venous fluid and the drive of the device are directly

Indirect drive without contact

(2). Do not integrate the intravenous fluid administration condition according to the doctor's prescription

It is possible to control precise dosage and speed by operation control to microcomputer.

Check it.

(3). The pump drive element with noiseless and vibration-free characteristics

Choose.

(4). Easy to carry portable battery for comfortable operation of patients

Allow the pump to run for a long time while moving.

1 is a functional venous fluid injection device for medical purposes according to the present invention

As a function summary diagram displayed separately

1. Duckwood pump

2. Pump drive control unit

3.portable battery

4. Consists of battery charger.

2 is a structural diagram of a duck pump according to Figure 2.1 cross-sectional view and Figure 2.2 side view 1

1.Pump drive tube (silicone rubber tube)

2. Shape memory alloy (SMA wires) driving device

3. bias spring

4. Drive element support

5. Electric circuit connecting plate of pump drive control part

6. Pump drive tube holder is marked.

Figure 2.3 side view 2 also shows the operation of the pump when the drive element is retracted

Indicates the state.

3 is a structural diagram of the driving element

1. Moving piece shaft

2. bias spring

3. Shape memory alloy wire spring

4. Moving piece support

5. The movable piece was marked.

Referring to the configuration and function in the order of the accompanying drawings as follows.

1. (Fig. 1): Function of each part shown in the function overview

-. Condition input device: Intravenous fluid administration condition according to doctor's prescription

Quantification of amount, start time of administration, duration of administration, etc.

Input by menu drive method.

-. Status display device: Intravenous fluid administration status calculated by microcomputer

The amount of intravenous fluid, administration time, etc. are displayed on the LCD.

-. Microcomputer: Arithmetic processing information input from condition input device

Single 8-bit microprocessor and storage

It is composed of chip type and displays status display device and output device.

To control.

-. Current output device: Control signal generated from the control part of the microcomputer

Convert it to current and output it.

-. Driving element: When current is applied to the shape memory alloy wire,

When heated and the temperature reaches the point of shape change

By applying the principle of shrinking and restoring to the memorized shape

Generates force to squeeze the pump drive tube.

-. Pump drive tube: Silicone rubber certified as harmless medical

It is shaped and the driving device and intravenous fluid are completely separated.

Lee.

In addition, the sequential pressing force generated from the driving element is determined.

The fluid is transferred by sequentially delivering to the venous fluid

All.

2. (Figure 2): Structure description of each part shown in the schematic diagram of the duckwood pump

Pump drive tube: length 60mm, inner diameter 2mm, made of silicone rubber

4 mm diameter cylindrical tube, transverse pattern of esophagus

With the structure to smooth the contractile linkage movement like the flesh

In the middle of the fluid line of the IV solution syringe set

Connect.

Shape memory alloy wire drive element: capable of shrinkage deformation of about 3%

Made of Ti-Ni alloy wire.

If the shape resistance is heated by current resistance heat,

Contraction deformation more than 2mm while maintaining the force

It is a structure that drives the movable piece using force.

Bias spring: When shape memory alloy wire shrinks and deforms,

By compensating for proper elasticity, the drive element can

It is a spring made to be.

Drive element support: Supports the drive element to maintain a constant

Moving in tooth and direction to pump drive tube

All.

Electrical circuit connecting plate: physically supports the drive element support and the pump drive tube support

Binding, and the current output element of the pump drive control unit

Make electrical connection to the shape memory alloy wire.

Pump drive tube holder: extra shovel into the fluid line of the IV solution syringe set

The pump drive tube connected to the pump drive element

Is a structure.

3. Description of operation principle of duck pump

The continuous and regular signal of the microcomputer of the pump drive control unit is amplified by the current output device and transmitted to each drive device, and the drive device made of the shape alloy wire is heated by the current resistance heat.

When the drive element is heated above the shape change temperature, it is contracted and deformed into a memorized shape. When the current is cut off, the drive element is cooled by natural heat dissipation and restored to its original state by the elasticity of the bias spring and the silicone rubber tube.

The physical force generated as described above is sequentially transmitted to the pump drive tube formed of silicon rubber, such as contracted interlocking movement of the lateral pattern muscle of the esophagus, and pressurizes the sap.

In the operation of the alder pump drive tube applying the Esophagus fluid transfer principle, the eight-step operation as shown in the following figure is performed continuously by the microcomputer's operational control.

(One). The drive tube of the alder pump applied in the present invention is simple in structure and can be pressurized without direct contact with the venous sap and the pump driving device, and can control the very precise amount without the feedback circuit by the flow rate and the hydraulic measurement.

In addition, even when the pump drive controller fails, intravenous fluid can be continuously administered using gravity.

(2). The shape memory alloy wire driving device applied to the present invention can be manufactured in a portable type because of the noiseless, ultra small and low power consumption characteristics.

As described above, the present invention can automatically and precisely inject a dose of intravenous fluid according to a doctor's prescription to assist the doctor and the caregiver's medical activities, and can be easily carried for a certain period of time for the patient's comfortable activity. It is effective in improving the medical environment by ensuring the

Claims (3)

In the intravenous fluid syringe set to precisely control the intravenous fluid dosage and administration rate, the intravenous fluid automatic metering device consisting of the 1. duck neck pump, 2. pump drive control unit and 3. portable battery. The alder pump driving tube according to claim 1, wherein a silicone rubber is properly shaped and attached to the conduit of the intravenous infusion syringe set for the purpose of driving the pump. The ultra-light weight according to claim 2, wherein the drive source of the alder pump is light. Pump driving element for shape memory alloy wire with ultra small and noiseless characteristics.