JPS59500254A - Device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Name: Device The present invention relates to an apparatus. In particular, the present invention relates to an apparatus for handling solutions to be injected into the veins of animals. do.

The usual method of dosing solutions intravenously is to obtain the desired flow via gravity feeding. This is done through a regulated valve. However, although many valves have been tried, Difficulty making adjustments and especially difficulty maintaining extended periods is common due to sore throat. has been reported. Difficulty maintaining desired flow rate over extended periods Some of the reasons are changes in the liquid front surface, changes in the patient, and cooling in the resin. It is gradual.

As a result, various methods of intravenous administration have been tried, but these are limited to closed-controlled metering. Adequate control of the flow rate is possible using a pump, but the use of a pump 0, which is generally considered undesirable due to various problems. Therefore, our objective is to develop a device in which the above-mentioned problems are solved.

SUMMARY OF THE INVENTION The present invention provides an intravenous dosing device comprising: a chamber, a first valve; The inlet of the small chamber provided with the valve, the outlet from the small chamber provided with the first and second valve, and the '14) liquid in the small chamber. a first liquid level sensor arranged to detect a body level; a second liquid level in the chamber; arranged to detect a level at the body level that is higher than the first fluid level; a second fluid level sensor, and an intravenous solution such that the solution fills the chamber; When the first valve is opened and the solution reaches the second level, the first valve is closed and the second valve is closed. When opened, the solution flows out the outlet by gravity, and when the second valve is closed, the solution flows out the outlet. Pressure is applied to perform a cycle in which the liquid descends to a first level. and control means used for operation when supplied to the inlet.

The distance between the first and second levels is usually constant to treat the fiber solution and maintain a constant pressure at the inlet. If the solution is delivered by force, this results in a substantially constant rate cycle.

However, maintaining a constant pressure at the inlet is difficult and difficult for various patients and various solutions. Since fluid is required at various solution supply rates, the rate control means adjusts the cycle rate. Preferably provided for controlling the temporally selected substantial A fixed amount of solution can be delivered to the patient.

Various methods of rate control include pressurizing the chamber above a second level to a predetermined pressure. However, electrical circuit control of the ratio is generally preferred.

One means of rate control uses a third valve downstream of the second valve to A timing means is used to open the third valve at intervals and times.

Another means of rate control is to control a second valve that opens only at preselected time intervals. As such, conditional circuit means are included in the circuit. In this case, the preferred method is selected in advance. a second valve and a timer for closing the means at set time intervals; A normally open means is included in the circuit to control.

Most preferably, the rate control is at least partially implemented on a cosopter or H microcomputer. controlled by computer means, said microconbeater means being controlled by a patient or a predetermined and control the rate of dosing in response to signals derived from the program.

Whatever rate control means is used, accurate rate control is highly desirable; This is at least more frequent than the time it takes for the solution to flow out of the chamber and refill the chamber. should be maintained or acted upon at equal times such that it is not repeated frequently .

Although the solution is supplied by an input pump, gravity feeding is usually sufficient.

There is no suggestion that the solution flow from the outlet to the patient by means other than gravity.

The first level is the air entering the exit and the possibility of embolism caused by the air. It should be sufficiently above the exit so that it is protected by a counter-exit.

The first and second valves may be operated in any suitable manner, but solenoid control is generally preferred. Yes.

The device according to the invention has at least two separable parts, the first part being a compartment. , carrying an inlet, an outlet, and first and second valves, and the second part carries an inlet, an outlet, and first and second valves; and a solenoid operating a second valve, and a first and second liquid level sensor. It carries such means as The first part is intended for single use only and if necessary Disposed of after use. The second part is intended for repeated use. second part There is no physical contact with the solution and there is no need to use it in a sterile state.

The first part, which comes into contact with the solution, is preferably supplied in sterile conditions.

A second liquid level sensor is positioned to vary the second liquid level and the amount of solution. is distributed in each cycle. Although this is not essential, it is desirable and Because it is preferable that the distribution is not substantially intermittent but substantially constant. It is.

This last desire is if the height difference value between the first and second liquid level is the same Even the measurements of different cubicles can be measured.

It is not essential that the first and second valves meter the valve, and generally the valve is just a valve. It is preferable that it is ON/OFF only.

The liquid level sensor is preferably a photoelectric effect device (propagation or reflection). Operate using t.

The sensor includes separate light emitting and receiving devices. However, the light emitting device The range of units and units coupled to the photodetector and photodetector are commonly available. is used as necessary.

The sensor is applied to detect the passage of uneven surfaces.

The third liquid level sensor may cause the liquid level in the chamber to drop to the second level due to some failure. Provided to shut off the device if the third level rises above the level.

The specific structure of the device according to the invention and its method of use will be described with the aid of the accompanying drawings. do.

FIG. 1 is a schematic diagram of a device according to the invention as put into use; FIG. 2 is an exploded perspective view of the device; FIG. 3 is a sectional view taken along line A-A in FIG. Figure 4 is a sectional view taken along line B-B in Figure 2; FIG. 5 is a partial schematic circuit diagram of the device; FIG. 5a is a schematic representation of the circuit diagram described above, and FIG. 6 is a section of the electric circuit used. minute block diagram, FIG. 7 is a block diagram of another circuit used; FIG. 8 is a first part of another device; 9 is a rear perspective view of the first part shown in FIG. 8, and FIG. 10 is a front perspective view of the first part shown in FIG. A front perspective view of the second part of another device, FIG. 11 is a schematic representation of the part of the other device , FIG. 12 is a flowchart showing a method of operating the other device, and FIG. 13 is a circuit diagram of the other device.

The device according to the invention shown in FIG. 1 comprises a first part 1 and a second part 2. The device according to the invention shown in FIG.

The first part 1 has a main body 10 .with an inlet 41 . Valve 16 downstream of inlet, downstream of valve 16 a chamber or cylinder 50, an outlet 51, a valve 17 upstream of the outlet; The cylinder 50 is supplied with the cylinder 50.

Valves 16 and 17 are identical in construction and are shown in more detail in FIG. valve 16 and 17 are the inlet portion 24, the cylinder 50 and the cylinder 50, which communicate with the inlet 41 and the cylinder 50, respectively. and an outlet portion 25 communicating with the outlet 51, respectively, and an elastic body 22 which is accommodated in the chamber 26. and a valve closing means comprising an operating section 23. In use, the operating section 23 When pressed, the main body 22 deforms downward as shown in FIG. allows a narrow passage for liquid flow from the inlet section 22 through the chamber 26 to the outlet section 25. Allow. When the operation part 23 is opened, the main body 22 closes the small chamber 26. Return to shape.

The cylinder 50 has an arm 54 for connecting the second part 2.

The second part 2 includes a body 55 with lugs 56 for coupling to an arm 54.

The main body 55 includes a core diode, phototransistor units 181 and 191. to carry.

In normal use, the second part 2 is assembled with the first part 1 to form windows 18 and 19. In the area in which it is located, the cylinder 50 has the shape shown in FIG.

As shown in FIG. 3, the cylinder has a window 61 through which units 181 and 1 The light from the diode at one end of the and through a path to be reflected by the reflective surface 20 to the curved wall 21. The light reflected from the wall 21 substantially passes through the units 181 and 191, the above-mentioned equipment. If necessary, equivalent equipment designated by the reference number raJ shall be provided in the use of the equipment. It is mounted on a stand 7 for containing intravenous solutions such as blood, glucose or electrolytes. Combined with bottle 3.

The bottle 3 is connected to the inlet 41 by the tube 4, and the cylinder 50 is connected to the breathing tube 12. is provided and an outlet 51 is connected to the patient by line 5. In addition, the electrical circuit of the device from the control unit 8 to the microprocessor 9, recorder printer, if necessary. It is connected to the printer 10 and remote alarm device 11 by multiplex cables.

Control unit 8 is normally open switch 1 and 72, these switches and a timer means.

When the operation is started, the control unit 8 acts to close the single head switch 71. .

As a result, the solenoid 14 is activated, and its knob 141 comes into contact with the operating part 23 of the valve 16. The valve 16 is opened and the solution flows by gravity into the bottle 3 and the tube 4 into the cylinder 5. When the rising uneven surface of the 0 solution reaches the level of the unit 191, the unit closes the valve 16. Open the switch 71 to close it, and open the switch 72tl to open the valve 17. - send a signal to the control unit to close;

The column of solution flows through valve 17 through outlet 51 and tube 5 to the patient.

When the uneven surface of the cylinder 50 on which the solution descends reaches the level of 22, 181, the unit closes the valve. send a signal to the control unit to close switch 17 and open switch 72; Ru.

Thereafter, the control unit repeats the sequence according to the controlled rate, unit 1 Since the distance between 81 and 1910 is constant, a constant volume of solution is distributed at a controlled rate. be done.

The Micro Zorocessor 9 is a recorder that monitors the patient's physical condition and changes the appropriate prescription rate. - Output to the printer 10. If the device malfunctions, the alarm device 11 issues a signal, It is arranged so that

The first part 1 can be discarded after one use, but the second part 2 can be used many times. good.

It is important to test logic that provides various forms of control other than those mentioned above. This point will be explained with reference to FIGS. 5a to 7 of the accompanying drawings.

In FIG. 5a, S indicates bottle 3, X and Y indicate valves 16 and 17; A and B are optoelectronic devices comprising a diode light emitter and a diode photodetector. and P indicates the patient.

In this case, devices A and B will have their outputs high when clean liquid is present in front of them. It's starting to look like this.

In this case, the operating cycle starts when the liquid fills the cylinder 5o, A and B is covered and its output ゛ becomes high. X and Y are closed.

The logical form is ABT XY III 00 where O and ■ indicate logical high and low voltages and valve closing and opening, respectively. vinegar. T indicates negative triganoculus, not shown here. In this position the device is standby a The negative trigger signal T arrives from the variable frequency oscillator force 1. Equipment cycle frequency number and final intravenous. This frequency is operated (manual control potentiometer) The logical form based on the force or given physiological input determined by 11 Tori Noculus therefore returns to a high level. The liquid in the cylinder 50 is released by opening the valve Y. It descends to patient P and the output of B becomes a low level. The logic then changes to the valve settings It is organized so that there is no

The logical form is here logic valve The liquid therefore continues to fall into the cylinder 50 such that the output of A is at a low level. logic With this change in, valve X is opened and valve Y is simultaneously closed.

The logical form is here logic valve ABT XY 00I IO The liquid level in the cylinder 50 now rises under the influence of the tip of the bottle 3. A's output becomes higher. The logic is arranged in such a way that no change occurs in the valve settings.

The logical form is here logic valve Therefore, the liquid continues to rise up the circle 5 column 50 so that the output of B is at a high level. A Since both Tori prepares for the meal.

The logical form is here logic argument Q ABT XY III 00 Therefore, to summarize the operation cycle: logic valve The logical forms of A and B are equivalent to when a liquid moves up or down a cylinder; The configuration of is complementary to the switch states of valves X and Y. This is A and This is achieved by switching the bistable Z whose edge I-IJ is changed by the change in B. Ru. If state 2 is included in the truth table, it can be summarized as follows.

l0INSOI 00IOlo IOINSIO IIIINSOO Here, NS indicates a case where it is not important.

Similar considerations apply when the opaque liquid is at the front of devices A and B and its outlet is low. This affects the logic values for the electrical circuit shown in Figure 6, and the photoelectric effect The outputs of devices A and B are fed to a comparator and each signal is applied to the I tension meter setting base. Compared to quasi-voltage. The reference voltage in each case is determined by the comparator when the liquid surface has an associated photoelectric effect. set to change the conditions when traversing the device. Comparator output is clean liquid High levels occur when the body covers the device. Dynamic “engineering” of logic circuits provided throughout in terms of its characteristics.

The "clean" comparator signal is provided to the logic circuit shown in FIG. The basic logic circuit is It is shown in FIG. 7 and its operation has already been described.

Instead, the logic sequence uses a microprocessor based on interrupt control. You can also execute it by

such that valves X and Y open at the same time or the side arm is not refilled (A and recognition of warning conditions such as the arrival of a trigger pulse when There are also provisions for flags.

The devices shown in Figures 8 to 13 are the same as those shown in Figures 1 to 7, and are mainly based on the microcombinator system. They differ in other respects.

Reference numerals similar to those used in FIGS. 1-7 are used where applicable.

The device of FIGS. 8-13 includes a first part 1 and a second part 2. The device of FIGS.

In this case, the first part 1 takes a shape different from that in Figs. 1 to 7 and is mainly filled with air. The breathing tube 12 is removed and the cylinder 50 is integrated with the first part 1 to further form the first part. A key lug 202 and The rear portion 206 of the second portion 2 has a recess 204 and a pin 205. To tolerate. Furthermore, the second part 2 is a combination of the first (1) and the second (2) parts. It has a goal receiver 207 provided for removably holding the goal.

In this case, the first portion 1 is different from that of FIGS. 1 to 7 as described above, but also Manual override buttons for solenoids 14 and 15 - 211 and 212 [and to any unit outside the first part 1 without using an external power supply] O includes batteries and control circuits as a self-contained unit that does not need to be connected The second part 2 contains solenoids 14 and 15, and windows 18 and 19 have individual solenoids 14 and 15. Diodes 181a and 191a and phototransistors 181b and 1 9''b, which are located on opposite sides of the cylinder 50 when the first part 1 is positioned. 181C and 191C.

Furthermore, the second part 2 has a hollow front surface and a groove provided with control switches 221 to 226. 0 with a four-character numeric display 227 The display device 227 uses an integrated circuit N5M1416. In addition, the second part 2 includes an alarm buzzer 22'8 and a voltage regulator which is LM340105. , LM339, four operational amplifiers in which two units are used. , and 6805 Microzorosesor.

The microprocessor is made by Motorola and has 8 bits and 4K ROM. have k.

FIG. 13 shows a circuit block diagram.

As is clear from Figure 13, what should be noted is that 4 ME (crystal 23 of z 0 is used and the signal to solenoids 14 and 15 is IRF 521. FET.

FIG. 11 shows a block diagram and FIG. 12 shows a flowchart.

In FIG. 11, X and Y indicate valves 16 and 17, and A and B indicate valves 16 and 17. Composed of odes 181a and 191a, phototransistors 181b and 191b indicates upper and lower liquid level sensors, S indicates bottle 3 and P indicates the patient.

The microprocessor executes the program according to the flowchart shown in Figure 12. do.

Operation of a selected one of switches 223 and 224 increases the rate of injection. The proportion of such selections to increase or decrease 9 is represented by display 227. Show. quantity of switches 225 and 226 (this quantity then turns off the device) (injected until The information is displayed on the display 227.

Opening the operation switch 222 opens both valves X and Y, allowing liquid to flow into the line. The air inside is purged before the line is connected to the patient.

As considered from the flowchart, the Microsoroscessor gives and displays an alarm. If there is a blockage in the line or if the supply S is empty, the injection can be stopped. Cut off.

1. Including each novel feature and combination of features disclosed herein. The scope of the present invention Transformation and adaptation occur without departing from the spirit.

In the above-mentioned variants, the second valve (e.g. valve 17) is within the chamber (cylinder 50). It pulses to inject a larger amount of liquid over a longer period. Such pulsations are related This is preferably achieved by pulsating the solenoid 15. Therefore, the desired timer move The stages allow valve 17 to open and close periodically at predetermined intervals during appropriate periods of the cycle. It is integrated into a part of the circuit supply solenoid 15 so as to In fact, Marks of Valve 17 By adjusting the exposure ratio appropriately, the flow rate can be opened or can be closed.

In another variation, the third liquid level sensor is connected to the first and second liquid level sensors. 8 of the first and second liquid level sensors on the first liquid level sensor during The distance between them is, for example, 2/3rds. For example, a switch A disconnected circuit is one in which the third liquid level sensor is not used or the first or second liquid level sensor is provided for use in place of the first and second liquid level sensors. Any one of the total amount of cylinders 50 between the between the liquid level sensors) and the amount of 2/3rds (between the third and first liquid level sensors). (among sensors) are selectively distributed.

Pure (μ (within “j”) Procedural amendment form) December 6, 1982 Mr. Kazuo Wakasugi, Commissioner of the Patent Office ■ Incident display PCT/AU83100012 2 Name of the invention Device 3 Person making the amendment Relationship to the incident: Patent applicant Name: Austin, George Alfred Priceby (1 other person) 4 agents Address: 8-10-5 Toranomon-chome, Minato-ku, Tokyo 105 Date of amendment order 6 Target of correction (1) Translation of the description and claims (2) Translation of drawings (3) Power of attorney 7 Contents of amendment (1) Translation of the description and claims (no change in content) (2) Engraving of the translation of the drawing (no changes to the content) (3) As shown in the attached sheet 8 List of attached documents (1) One copy each of a translated version of the written specification and scope of claims. (2) Translation of the printed drawing: 1 copy (3) Power of attorney and its translation: one copy each (2)

Claims (1)

[Claims] 1. An intravenous medication device, the device comprising: a chamber; a first valve; An inlet, an outlet from a small chamber provided with a second valve, a first liquid repe in the small chamber, a first liquid level sensor arranged to detect a second liquid level within the chamber; a second liquid level located to detect a liquid level higher than the first liquid level; Fluid level sensor, and intravenous solution is activated by pressure to the inlet to the cylindrical control means which operate in use when supplied for running a cycle; The cell opens the first valve so that the chamber begins to fill with solution and enters the second level. When the solution arrives, the first valve is closed and the second valve is opened so that gravity causes 7 the solution flows out the outlet, and the second valve is closed once the solution has descended to the first level. An intravenous medication device comprising a chain. 2. Claims in which the device includes means for supplying the solution at a constant pressure to the inlet 2. The intravenous medication device according to item 1. 3. the device is configured to allow a selected substantially constant amount of the solution to flow from the outlet over time; Claim No. 3 includes rate control means for controlling the rate of repetition of said cycle. The intravenous medication device according to item 1. 4. The rate control means controls the third valve downstream of the second valve and the third valve at selected time intervals. 3. Intravenous medication according to claim 3, comprising timing means for opening three valves. Device. 5. The rate control means for opening the second valve at preselected time intervals. 4. An intravenous dosing device as claimed in claim 3, including conditional circuit means for operating. 6. The conditional circuit means includes a normally open means for controlling a second valve in the circuit and a preselected Claim 5 comprising a timer means for closing the normally open means at a time interval Intravenous medication device as described. 7. The intravenous medication device according to claim 3, wherein the rate control means includes a computer. Place. 8. The computer is guided by the patient and/or the predetermined glodarum. Claim 7 adapted to control dosing of the solution in response to a signal. intravenous medication device. 9. Claims 1 to 8, wherein the solution is injected into the patient through the outlet only by gravity. An intravenous dosing device according to any of paragraphs. 10 The first level is sufficient to protect against the possibility of air entering the outlet. Claims 1-. above the outlet. Intravenous medication device according to any of clause 9 . 11 There are two separate parts, the first part is the chamber, the inlet, the outlet and the first and enclosing the second valve, the first part includes means for operating the first and second valves; and a second liquid level sensor. Intravenous medication device as described. 12. The method according to claim 11, wherein the second part additionally includes rate control means. Intravenous medication device. 13 Claims where the second part is reusable and the first part is disposed of after use 13. The intravenous medication device according to item 11 or 12. 14. Claim 1 in which the second part has no physical contact with the solution during use. 14. An intravenous medication device according to any one of items 1 to 13. 15. A second liquid sensor changes the second liquid level so that the amount of the solution changes each cycle. Any of claims 1 to 14 whose position can be adjusted so that it is distributed by The intravenous medication device according to claim 1. 16. The first portion is selected from a number of first portions each having a different amount of chambers. An intravenous medication device according to any one of claims 11 to 14. 17. Any one of claims 1 to 16 in which the first and second valves turn on and off the valves. The intravenous medication device according to any one of the above. 18. Claim 1, wherein the first and second liquid level sensors are photoelectric effect devices. 18. The intravenous dosing device according to any one of items 1 to 17. 19. The device is configured such that the liquid level rises to a third level in the chamber that is greater than or equal to the second level. Claim 1 includes a third liquid level sensor that shuts off the device when the liquid level rises. 19. The intravenous dosing device according to any of items 18 to 18. 20 The control means causes the level in the chamber to drop to the first level within a predetermined time. 21 of Claims 1 to 19, which is used to shut off the device if the system does not cool down. Claims that the level in the chamber does not rise to the second level within a predetermined time The intravenous medication device according to any one of Items 1 to 20. 22. Any of claims 1 to 21, wherein the control means is adapted to issue an alarm. The intravenous medication device according to any one of the above. 231. An intravenous medication device that operates according to the flowcharts disclosed herein. 24. An intravenous dispensing device substantially as described in any of the accompanying drawings. Engraving (no changes to the content)