KR101727229B1

KR101727229B1 - Measuring apparatus for the flow rate of ringer solution

Info

Publication number: KR101727229B1
Application number: KR1020160010456A
Authority: KR
Inventors: 곽경호; 고왕기; 이승완
Original assignee: 주식회사 메디유케어
Priority date: 2016-01-28
Filing date: 2016-01-28
Publication date: 2017-04-20

Abstract

The present invention relates to an infusion injection speed measuring device. By accurately sensing a drop with respect to the trembling of an infusion drop pipe caused by external force such as the movement of a patient, an infusion injection speed is measured, so an infusion injection speed according to prescription can be maintained. Thus, a safety accident which may occur when an infusion is excessively or insufficiently injected to a human body can be preemptively prevented. The infusion injection speed measuring device according to the present invention comprises: a light source (111) for irradiating light to a drop (200) loaded from an infusion drop pipe (220); a mirror for reflecting light passing through the light source (111) or the drop (200); and a sensor (113) for detecting light reflected through the mirror. The mirror is a concave mirror (112) disposed on the same plane as the bottommost end part of the drop (200) disposed right before being separated from the light source (111) and the infusion drop pipe (220), and the light source (111) is disposed to have a valid ejection range (205) which is the range of light irradiated to the concave mirror (112). The sensor (113) is disposed to have a valid incidence range (206) which is the range of light irradiation irradiated from the light source to have the valid ejection range (205) and collected and projected while being reflected through the concave mirror (112). The sensor (113) is disposed in one side of the topmost end surface of a volume for forming the valid ejection range (205). Thus, a drop tilted and loaded with respect to the infusion drop pipe (220) is detected.

Description

TECHNICAL FIELD [0001] The present invention relates to a liquid infusion rate measuring apparatus,

The present invention relates to a liquid infusion rate measuring apparatus, and more particularly, to a liquid infusion rate measuring apparatus which accurately detects a drop of a liquid drop tube due to an external force such as a patient's motion and measures a liquid infusion rate, Which can prevent a safety accident that may occur due to excessive or inadequate administration of the liquid to the human body.

Generally, in hospitals, intravenous infusion is used in which a needle is inserted and injected directly into the vein to supply fluid, medicine, or blood to the human body.

The intravenous infusion therapy injects the sap directly into the vein, so that it is accurate and quick.

In order to perform the intravenous injection therapy, most hospitals use a set of liquids consisting of a fluid container, a liquid infusion bottle, a fluid syringe, a flow controller, and an injection needle, and a nurse inserts the injection needle directly into the patient's vein, The infusion rate of the infusion fluid was calculated and the infusion rate of the infusion fluid was directly controlled by the naked eye using a flow controller of the infusion set.

However, as described above, since the nurse manually adjusts the infusion rate of the liquid, if the infusion rate of the infusion fluid into the patient's vein is fast, excessive infusion of fluid may occur and side effects may occur. If the infusion rate of the infusion fluid is low, So that the efficacy of the sap solution is remarkably reduced.

In addition, it is difficult for the nurse to manually adjust the infusion rate according to the prescription. Because the infusion rate is not constant depending on the person who adjusts, the medical staff periodically checks the remaining amount of the fluid. This was a waste problem. This is the same when injecting blood, drugs, etc. into a patient.

Therefore, in the case of infusion of liquid or the like, it is important that infusion of liquid or the like is performed at a correct speed according to the prescription.

In order to solve the above problems, Registration No. 20-0409394 (registered on Feb. 15, 2006) is installed in a medical ringer set comprising a ringer bottle, a Ringer's solution dispenser, a ringer's fluid amount adjusting device, a connecting hose and a syringe A sensing unit including a light emitting element and a light receiving element for sensing the Ringer's solution droplet; an arithmetic processing unit for calculating the injection amount and the remaining amount of the Ringer's solution in response to the signal, and a remaining amount is outputted to the LCD, and the Ringer's solution is abnormally inputted And a radio transmitter for quickly notifying the remote nurse of the signal.

The above-mentioned patent discloses that when a ringer solution drop passes between a light emitting element and a light receiving element, light passing through the Ringer's solution drops and light having a reduced amount of light is sensed to measure the infusion rate of the liquid and the remaining amount of the liquid. When the liquid set is shaken or tilted due to movement or the like, the Ringer's solution drop can be dropped out of the detection range and thus the accurate infusion rate can not be measured.

7A and 7B, in which the x axis is the number of senses and the y axis is the signal value, light is focused by the convex lens effect of the Ringer's solution droplet, and the amount of light is increased Or if the infusion rate of the liquid is increased, the Ringer's solution drop can not be detected, and thus the error rate with respect to the infusion rate of the liquid can be significantly increased.

Disclosure of the Invention The present invention has been proposed in order to solve the above-mentioned problems, and it is an object of the present invention to provide a method and apparatus for detecting a point to be injected even with respect to swinging of a liquid- It is an object of the present invention to provide a liquid infusion rate meter capable of measuring the infusion rate.

In addition, it is an object of the present invention to provide a fluid infusion rate measuring instrument which can measure the infusion rate of fluid and confirm the remaining amount of infusion fluid, and generate a warning sound when the infusion of fluid into the patient is completed, .

The problems to be solved by the present invention are not limited to the above-mentioned problems, and other matters not mentioned can be clearly understood by those skilled in the art from the following description.

In order to accomplish the above object, the liquid infusion rate measuring apparatus according to the present invention includes a light source 111 for irradiating light to a drop 200 dropped from a liquid drop tube 220, And a sensor (113) for detecting light reflected through the mirror, wherein the mirror includes a light source (111) and a light source Is a concave mirror (112) positioned on the same plane as the lowermost end of the point (200) positioned immediately before leaving the point tube (220), and the light source (111) And the sensor 113 is disposed so as to have an effective emission range within a range of the effective emission range 205. The sensor 113 reflects light from the light source through the concave mirror 112 so as to have the effective emission range 205, The effective incidence range 206, which is a range And is configured to detect the point where the sensor 113 is positioned on one side of the uppermost surface of the volume forming the effective emission range 205 and tilted and dropped relative to the liquid drop pipe 220 .

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A signal processing unit 120 for receiving a signal generated by sensing the dots 200 from the sensor 113 and calculating a fluid infusion rate and a remaining amount of fluid; And a display unit 140 for displaying the speed and the remaining amount of the liquid.

The present invention may further comprise an optical fiber 114 for receiving the light of the light source 111 reflected from the concave mirror 112 and a light source 111 for condensing the light of the light source 111 transmitted from the optical fiber 114 And may further comprise a lens 115.

As described above, according to the present invention, the liquid infusion rate measuring device measures the liquid infusion rate accurately by sensing the liquid even against the swing of the liquid drop tube due to an external force such as a patient's motion, thereby greatly reducing the error rate of the liquid infusion rate In addition, according to the prescription, the liquid can be normally injected into the human body, so that it is possible to prevent safety accidents due to excessive and undesirable administration of the liquid.

In addition, it is possible to check the remaining amount of the fluid by measuring the infusion rate of the fluid, and when the injection of the fluid is completed to the patient, a warning sound is notified to the infant so that the infusion process of the infusion fluid is not needed from time to time. And it has an effect of reducing blood vessel damage and time consuming due to prolonged use of the patient.

FIG. 1 is a block diagram of a liquid infusion rate measuring apparatus according to an embodiment of the present invention,
FIG. 2 is a block diagram showing a structure of an apparatus for sensing a fluid in a fluid infusion rate measuring apparatus according to an embodiment of the present invention,
FIG. 3A and FIG. 3B are graphs showing the path and light amount of light when there is no drop in the liquid sensing part of the liquid infusion rate measuring instrument according to the embodiment of the present invention,
FIGS. 4A and 4B are diagrams for explaining the light path and light amount when the liquid detection unit of the liquid infusion rate measuring apparatus according to the embodiment of the present invention is dotted,
FIGS. 5A to 5C are diagrams illustrating a detection range for detecting a drop of a liquid infusion rate measuring instrument according to an embodiment of the present invention. FIG.
FIG. 6 is a state diagram illustrating a position of a light source of a liquid infusion rate measuring apparatus according to an embodiment of the present invention. FIG.
7A and 7B are graphs showing experimental results of a conventional transmission type liquid infusion rate measuring instrument,
8A and 8B are graphs showing experimental results of a liquid infusion rate measuring apparatus according to an embodiment of the present invention.

Hereinafter, a fluid infusion rate measuring instrument according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a flow chart of a fluid infusion rate measuring apparatus according to an embodiment of the present invention, and FIG. 2 is a fluid sensor of a fluid infusion rate measuring apparatus according to an embodiment of the present invention.

3A and 3B are a path and a light amount of light when there is no drop in the liquid sensing part of the liquid infusion rate measuring instrument according to the embodiment of the present invention. FIGS. 4A and 4B are views 5A through 5C are diagrams showing a detection range for detecting the drop of the liquid infusion rate measuring apparatus according to an embodiment of the present invention. Fig.

6 is a state diagram showing the position of a light source of the liquid infusion rate measuring apparatus according to an embodiment of the present invention.

FIGS. 7A and 7B are graphs showing experimental results of a conventional transmission type liquid infusion rate measuring instrument, and FIGS. 8A and 8B are graphs showing experimental results of a liquid infusion rate measuring apparatus according to an embodiment of the present invention.

In the drawings, the same reference numerals are given to the same elements even when they are shown in different drawings. In the drawings, the same reference numerals as used in the accompanying drawings are used to designate the same or similar elements. And detailed description of the configuration will be omitted. Also, directional terms such as "top", "bottom", "front", "back", "front", "forward", "rear", etc. are used in connection with the orientation of the disclosed drawing (s). Since the elements of the embodiments of the present invention can be positioned in various orientations, the directional terminology is used for illustrative purposes, not limitation.

As shown in FIGS. 1 to 6, the liquid infusion rate measuring instrument according to one preferred embodiment of the present invention is configured to detect a drop 200 loaded on a liquid drop drip tray 210, To measure the infusion rate of the liquid.

In other words, a liquid sensing unit for sensing a drop 200 dropping in the liquid drop dispenser 210, and a control unit 210 for receiving an electric signal generated by sensing the drop 200 from the liquid sensor, A display unit 140 for displaying the infusion rate and the remaining amount calculated by the signal processing unit 120 and a controller 130 for controlling the display unit 140 and the fluid sensing unit, And an operation unit 160 for operating the operation of the fluid sensing unit to the control unit 130.

The apparatus may further include a power supply unit (not shown) for supplying power for operating the liquid infusion rate measuring apparatus.

As shown in FIG. 2, the fluid sensing unit includes a light source 111 for irradiating light to a dropping point, a mirror for reflecting light of the light source, and a sensor for detecting light through the mirror 113).

Here, the light source 111 is used for generating and irradiating light such as an LED, and is preferably capable of maintaining a constant light intensity, and more preferably, uses green light.

It is preferable that the mirror uses a concave mirror 112 having a concave reflection surface to refract and reflect light transmitted through the light source 111 or the dot 200.
The concave mirror 112 is positioned on the same plane as the lowermost portion of the dot 200 positioned immediately before the light source 111 and the liquid drop pipe 220 are separated from each other.

The sensor 113 should be able to detect light such as an illuminance sensor and vary an output signal according to the amount of the light. The light from the light source 111, which is reflected from the concave mirror 112, And a lens 115 for condensing the light of the light source 111 transmitted from the optical fiber 114. The optical fiber 114 may be an optical fiber,

The light source 111 and the sensor 113 are located on one side outward from the radial direction of the liquid receiving dot cylinder 210 and the concave mirror 112 is located on the outer side of the liquid receiving dot cylinder 210 from the radial direction It is preferable to be located on the other side.

At this time, the light source 111 is irradiated while transmitting at least a part of the drop 200 to be dropped, and the sensor 113 should be positioned away from the light source 111.

The light source 111 positioned as described above irradiates light into the liquid receiving dot 210 and the irradiated light is reflected and condensed by the concave mirror 112 and reaches the sensor 113 do.

3A and 3B, light irradiated from the light source 111 is reflected by the concave mirror 112 and is reflected by the concave mirror 112. In this case, And is condensed to reach the sensor 113.

The sensor 113 detects the light of the light source 111 reflected through the concave mirror 112 and the light amount of the light detected by the sensor 113 is greater than a certain level due to the concave mirror 112 .

4A and FIG. 4B, at least a part of the light emitted from the light source 111 is transmitted through the droplet receptacle 200, The reflected light is reflected by the concave mirror 112 and reaches the sensor 113.

Here, the light emitted from the light source 111 is condensed through the dots 200 serving as a convex lens, and reaches the concave mirror 112. Then, the reflected light is diffused through the concave mirror 112 and detected by the sensor 113. Therefore, since the light detected by the sensor 113 is diffused through the concave mirror 112, the light amount of light is greatly reduced as compared with the case where the light is not transmitted through the dot 200.

In the case where the liquid receiver 210 is shaken or tilted due to movement of a patient to which liquid is injected or the like, when the drop 200 is dropped in the liquid drop container 210 in a direction tilted by gravity Light of the light source 111 is transmitted to a part of the drop 200 falling along the inclined liquid drop container 210 so that the drop 200 can be sensed.

In other words, if the liquid dispenser 210 is tilted, the liquid sensing part mounted on the liquid dispenser 210 also tilts, so that the path of the light irradiated by the light source 111 is inclined It is dropped in the same direction as before the tilting and only in the tilted direction. 5A, when the liquid drop pipe 220 is tilted up and down in the sensing range 300, the light source 111 is moved in the vertical direction It is possible to detect the dot because light passing through at least a portion of the dot is transmitted. Here, when the liquid receiving drip tube 220 is tilted in the left-right direction on the basis of the liquid receiving drip tube 220, the focus of the light passing through the drippers is changed to the vertical direction only, Can be ignored because there is almost no change.

5A, the sensing range 300 may include an effective incidence range 206 (see FIG. 5A) in which the light of the light source 111 is condensed while being reflected through the concave mirror 112 to reach the sensor 113 ) Within the effective emission range 205, which is the emission range of the light source 111. The effective emission range 205 corresponds to the range in which the dot is located.

Here, it is preferable that at least a part of the position of the dot is included in the effective emission range 205. If the position of the dot is not included in the effective output range 205, the amount of light incident on the sensor 113 when there is no dot and the light passing through the dot not included in the effective output range 205 Will reach the sensor 113, and rather the increased amount of light will be detected.

3A, the light source 111, the sensor 113, the concave mirror 112, and the liquid-receiving dot 112 are arranged on the path line of the drop that is dropped in the upright state, The effective incidence range 205 that is irradiated through the light source 111 on a horizontal section passing through the tube 220 and the effective incidence range 205 that is condensed while being reflected through the concave mirror 112 and is incident on the sensor 113 206).
Here, the sensor 113 may be positioned on one side of the uppermost surface of the volume forming the effective emission range 205 so as to detect a drop that is tilted with respect to the liquid drop pipe 200, and the effective emission range 205 and the uppermost end face of the effective incidence range 206 may be in the same plane position.

On the other hand, the sensing range 300 is defined as a range from +20 degrees to - 20 degrees with respect to the horizontal cross section with respect to light irradiated through the light source 111 passing through the dotted line, 20 DEG, but the present invention is not limited thereto. That is, the sensing range 300 can be changed according to the detection range of the sensor 113. [

5B is a schematic view of a path of light when the droplet 201 is dropped toward the upper side with respect to the droplet 200 which is dropped in the upright state of the liquid drop tube 220.

That is, light passing through the dots 201 shifted toward the upper side is collected through the dots 201, diffused while being reflected through the concave mirror 112, and irradiated outside the detection range of the sensor 113 do. Accordingly, a small amount of light is detected as compared with a state in which there is no dot, thereby detecting the dot.

5C is a schematic view of the path of light when the droplet 202 is dropped downward with respect to the droplet 200 to be dropped in the upright state.

That is, the light of the light source 111 is reflected through the concave mirror 112 and is condensed and passes through the dots 202, which are shifted downward. The light is diffused by the dots 202, 113). Accordingly, a small amount of light is detected as compared with a state in which there is no dot, thereby detecting the dot.

6, the light source 111 is positioned to be irradiated to the lowermost end of the droplet 200 located immediately before the droplet is discharged from the liquid drop tube 220.

Since the lowermost part of the drop 200 detached from the receiver liquid dropping tube 220 has a minimum displacement with respect to the bouncing or shaking of the liquid drop receiver 210, the drop 200 can be detected easily. In other words, the drop 200 dropping from the inclined or swollen liquid drop container 210 becomes more difficult to detect because the fall angle increases as the distance separating from the drop receiver 220 becomes longer.

Therefore, in order to effectively detect the drop even when the liquid drop bottle 210 is tilted or wobbling, the light source 111 is positioned so as to irradiate the lowermost end of the drop 200 deviating from the liquid drop pipe 220, It is possible not only to facilitate the detection of the dot pattern 200 but also to significantly reduce the error rate due to the undetected dot.

If the light source is irradiated to the intermediate portion in the longitudinal direction of the liquid receiving point dispenser 210 when the period in which the droplet 200 is dropped from the liquid receiving drip tube 220 is shortened, When the light source is irradiated to the lowermost end of the drip 200 that is separated from the liquid drop dripping tube 220 as described above, the droplet 200 is moved by gravity It is possible to precisely detect the dot 200 because it is before acceleration.

As described above, when the light reflected by the concave mirror 112 is detected by the sensor 113, the sensor 113 determines the signal value according to the light amount of the light.

8A and 8B, when light reaching the sensor 113 is not transmitted through the dot 200, light is condensed by the concave mirror 112 and the sensor 113 The light diffused by the light source 111 is reflected by the dot 200 when the light is transmitted through the dot 200 and reaches the sensor 113. [ ), And then diffused by the concave mirror 112, the signal value obtained by converting the light amount of the light detected by the sensor 113 is detected to be 1900 lx or less.

Therefore, since the amount of light detected by the sensor 113 through the dots 200 is considerably lower than the amount of light detected by the sensor 113 without passing through the dots 200, Can be made more accurate.

Thereafter, the signal converted by the sensor 113 is transmitted to the signal processing unit 120, and the signal processing unit 120 detects the values shown in FIGS. 8A and 8B. Therefore, the injection rate of the liquid is calculated by analyzing it according to the signal value of the sensor 113. That is, since the signal value is different depending on whether the light is transmitted to the dot 200, it is possible to know the time when the dot 200 drops, and the liquid infusion rate can be calculated. In addition, the remaining amount of the liquid in the liquid receiving tube 230 can be calculated using the liquid infusion rate.

Here, the x-axis represents the number of times of sensing and the y-axis represents the amount of light.

On the other hand, when the liquid is not a transparent liquid but an opaque liquid such as blood, since the light of the light source 111 can not transmit opaque liquid, the light reaching the concave mirror 112 and the sensor 113 So that the signal value at the sensor 113 is significantly lowered. Accordingly, since the signal value is much larger than that when the transparent dot is detected in the presence / absence of the opaque dot, the injection rate and the remaining amount of the liquid can be more accurately calculated.

The infusion rate and remaining amount of the infusion fluid calculated by the signal processing unit 120 are displayed on the display unit 140 so that it is possible to accurately recognize not only the medical staff but also patients and the like in which the fluid is being injected.

In addition, when the infusion rate and the remaining amount are received by the control unit 130 and an abnormality occurs in a predetermined infusion rate of the infusion fluid or a predetermined amount of infusion liquid is reached, the alarm sound unit 150 is operated, .

On the other hand, the manipulation unit 160 is configured to preset the infusion rate and the remaining amount of the fluid according to the doctor's prescription.

The manipulation unit 160 includes an execution button for executing the fluid sensing unit.

Therefore, in the case of using the liquid infusion rate measuring instrument of the present invention constructed as described above, it is not necessary to arbitrarily calculate not only the non-expert but also the expert, so that the liquid infusion rate can be normally set. It is possible to measure the infusion rate of the fluid even if the infusion set is shaken or tilted by the movement and the error rate concerning the measurement of the fluid infusion rate can be greatly reduced.

Accordingly, it is possible to prevent excessive infusion and undue administration of the infusion liquid to the patient, thereby preventing a safety accident in advance.

In addition, it is possible to confirm the remaining amount of the fluid by measuring the infusion rate of the fluid, and it is unnecessary for the medical staff to check the injection process of the fluid from time to time by informing the patient of the warning sound when the infusion of the fluid is completed. And it has an effect of reducing blood vessel damage and time consuming due to prolonged use of the patient.

The embodiments of the present invention described above and shown in the drawings should not be construed as limiting the technical idea of the present invention. The scope of protection of the present invention is limited only by the matters described in the claims, and those skilled in the art will be able to modify the technical idea of the present invention in various forms. Accordingly, such improvements and modifications will fall within the scope of the present invention if they are apparent to those skilled in the art.

111: light source 112: concave mirror
113: sensor 114: optical fiber
115: lens 120: signal processor
130: control unit 140: display unit
150: warning sound part 160:
200 to 202: Dot 205: Effective emission range
206: Effective incidence range 210:
220: liquid drop tube 230: liquid tube
300: detection range

Claims

A light source 111 for irradiating light to the drop 200 dropped in the liquid drop tube 220 and a mirror for reflecting the light having passed through the light source 111 or the drop 200, And a sensor (113) for detecting light reflected through the liquid flow path,
The mirror is a concave mirror 112 positioned on the same plane as the lowermost portion of the dot 200 positioned immediately before the light source 111 and the liquid drop pipe 220 are separated from each other,
The light source 111 is positioned to have an effective emission range 205 which is a range of light irradiated to the concave mirror 112,
The sensor 113 is positioned so as to have an effective incidence range 206 that is a range of the irradiated light that is converged while being irradiated from the light source and reflected through the concave mirror 112 so as to have the effective emission range 205,
And the sensor (113) is located on one side of the uppermost end of the volume forming the effective emission range (205), and is configured to detect a drop that is tilted with respect to the liquid drop pipe (220) Speedometer.

The method according to claim 1,
A signal processing unit 120 for receiving a signal generated by sensing the dot 200 from the sensor 113 and calculating a fluid infusion rate and a fluid remaining amount; And a display unit (140) for displaying the remaining amount of the fluid.

The method of claim 2,
An optical fiber 114 for receiving the light of the light source 111 reflected from the concave mirror 112 and a lens 115 for condensing the light of the light source 111 transmitted from the optical fiber 114 Further comprising a flow rate sensor for measuring the flow rate of the infusion fluid.

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