KR20220097073A - Automatic vein detecter - Google Patents

Abstract

An automatic vein detector according to the present invention comprises: a support part for holding an arm of a subject; a pressing unit provided on the support part to press the arm of the subject; a near-infrared ray irradiation part provided in an upper portion of the support part and configured to irradiate the arm of the subject with near-infrared rays at a predetermined number of times to detect the vein of the subject; a light-quantity measurement part measuring the quantity of light reflected from the arm of the subject according to the irradiation of the near-infrared ray at the predetermined number of times; and a vein detection part detecting a vein site based on the measured quantity of the light and determining a target venipuncture point at the detected vein site, wherein the vein detection part may detect a plurality of vein boundary lines by connecting only positions where the difference in the quantity of the light measured the predetermined number of times is greater than a predetermined range for each count and determine the target venipuncture point within a predetermined range in the vicinity of the center between the plurality of vein boundary lines.

Description

Automatic Vein Detector {AUTOMATIC VEIN DETECTER}

The present invention relates to an automatic vein searcher.

In general, blood collection is performed to obtain blood required for clinical pathology laboratories or various tests from blood vessels. Blood collection is performed by a doctor or nurse, clinical pathologist, and nursing assistant at a hospital or clinic, finding blood vessels, tying a tourniquet to the blood collection site by hand, and inserting a syringe for blood collection into the blood vessel to obtain predetermined blood.

However, when collecting blood or securing a vein, the distribution of veins is irregular, and if there is swelling of the skin or insufficient elasticity of the vein, the skin may be stabbed several times. In addition, since securing the intravenous line is usually done manually, it is labor-intensive and takes a lot of time, and in an emergency, securing it is delayed, so that proper treatment cannot be performed. And, if there is an infection caused by a specific microorganism, gloves are worn when securing the intravenous route. There is a problem in that it takes a long time to collect blood and the tension may change each time the tourniquet is tied. For example, if the tourniquet is tied too weakly, there is a problem that blood flow is not properly compressed and blood collection is not performed properly. may be

Not only in large hospitals, but also blood collection and intravenous access are performed manually and are time-consuming tasks. The present invention ultimately proposes a blood collection device capable of automatically performing blood collection and infusion injection, etc., since there are many overloads in terms of time and cost to perform blood collection and infusion injection by personnel such as nurses.

The technical problem to be achieved in the present invention is to provide an automatic vein searcher.

The technical problems to be achieved in the present invention are not limited to the above technical problems, and other technical problems not mentioned will be clearly understood by those of ordinary skill in the art to which the present invention belongs from the following description.

In order to achieve the above technical problem, the automatic vein searcher according to the present invention includes a support for mounting the arm of the subject; a pressing unit provided to press the arm of the subject on the support part; a near-infrared irradiator provided on the upper portion of the support for irradiating near-infrared rays to the arm of the subject a predetermined number of times to detect the subject's veins; a light quantity measuring unit measuring the amount of light reflected from the arm of the subject according to the near-infrared irradiation the predetermined number of times; and a vein detection unit configured to detect the vein site based on the measured light amount and determine a target venipuncture point in the detected vein area, wherein the vein detection unit includes: A plurality of vein boundary lines may be detected by connecting only positions having a difference greater than a predetermined range, and the target venipuncture point may be determined within a predetermined range near a center between the plurality of vein boundary lines.

The automatic vein searcher may further include a syringe movement control unit for moving the syringe to puncture the vein at a predetermined angle to the target venipuncture point. Here, the predetermined angle may correspond to 10 to 20.

The automatic vein searcher further includes a spectrometer for detecting that the syringe is filled with the test subject's blood, wherein the syringe separation control unit inserts the syringe into the target vein when the amount of blood filling the spectrometer is greater than or equal to a predetermined range It can be separated from the puncture site.

The automatic vein searcher further includes a spectrometer for detecting that the syringe is filled with the test subject's blood, wherein the syringe corresponds to a catheter, and the syringe separation control unit is the spectrometer with the amount of blood filled in the spectrometer or more In this case, the gel nose of the catheter and the stillet may be separated.

In the automatic vein searcher, when the light quantity measurement unit fails to detect positions where the difference in light quantity is greater than a predetermined range for each number of times, and the vein detection unit does not detect the vein site, the compression unit recompresses the arm of the subject. It may further include a pressing unit control unit that controls to press or to press more.

The vein detection unit generates a line by connecting only positions where the difference in the amount of light for each number of times measured a predetermined number of times is not greater than a predetermined range, but can be recognized as a line within the vein boundary line or outside the vein.

The automatic vein searcher according to an embodiment of the present invention can replace the role of the examiner/blood source as it is possible to automatically detect the vein of the examinee to collect and/or inject blood from the vein of the examinee.

When the automatic vein searcher according to an embodiment of the present invention is provided to a hospital with insufficient manpower, there is a significant effect in reducing manpower costs.

In addition, based on the present invention, it is possible to install a module when periodic blood collection is required in the intensive care unit and connect WiFi to allow blood collection without manual operation at a desired time. In addition, in the emergency room, it is possible to install a simple test kit on the machine so that the test can be performed immediately.

The effects obtainable in the present invention are not limited to the above-mentioned effects, and other effects not mentioned may be clearly understood by those of ordinary skill in the art to which the present invention belongs from the following description. will be.

1 is a block diagram illustrating an automatic vein searcher according to the present invention.
FIG. 2 is a diagram for explaining the structure of an automatic vein searcher including a light quantity measuring unit 140 .
3 is an exemplary diagram for explaining the function of the light quantity measuring unit 140 .
4 is a diagram illustrating an example of a model of the automatic vein searcher 100 according to the present invention.
5 is a view showing the spectrometer 170 in the automatic vein searcher 100 according to the present invention.

Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings. DETAILED DESCRIPTION The detailed description set forth below in conjunction with the appended drawings is intended to describe exemplary embodiments of the present invention and is not intended to represent the only embodiments in which the present invention may be practiced. The following detailed description includes specific details in order to provide a thorough understanding of the present invention. However, it will be apparent to one of ordinary skill in the art that the present invention may be practiced without these specific details.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS [0012] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS [0010] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS [0010] Reference is made to the accompanying drawings, which show by way of illustration specific embodiments in which the present invention may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the present invention. It should be understood that the various embodiments of the present invention are different but need not be mutually exclusive. For example, certain shapes, structures, and characteristics described herein with respect to one embodiment may be implemented in other embodiments without departing from the spirit and scope of the invention. In addition, it should be understood that the location or arrangement of individual components within each disclosed embodiment may be changed without departing from the spirit and scope of the present invention. Accordingly, the detailed description set forth below is not intended to be taken in a limiting sense, and the scope of the present invention, if properly described, is limited only by the appended claims, along with all scope equivalents as those claimed. Like reference numerals in the drawings refer to the same or similar functions throughout the various aspects.

In some cases, well-known structures and devices may be omitted or shown in block diagram form focusing on core functions of each structure and device in order to avoid obscuring the concept of the present invention. In addition, the same reference numerals are used to describe the same components throughout the present specification.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings in order to enable those of ordinary skill in the art to easily practice the present invention.

The automatic vein searcher according to the present invention automatically searches for veins in the arm of a subject (or patient, etc.), and moves a syringe for blood collection and/or injection (injection of fluid, etc.) It performs the function of automatically puncturing, separating the syringe depending on whether it is for blood collection or injection, or leaving a part of the syringe in the punctured state and separating only the part. Hereinafter, the automatic vein searcher according to the present invention will be described in more detail.

1 is a block diagram illustrating an automatic vein searcher according to the present invention.

Referring to Figure 1, the automatic vein searcher includes a support unit 110, a compression unit 120, a near-infrared irradiator 130, a light quantity measurement unit 140, a vein detection unit 150, a syringe movement control unit 160, a spectrometer ( 170), the compression unit control unit 180 and the syringe separation control unit 190 may be included.

The support unit 110 supports under the arm so that the arm of the subject (patient) is stably supported for blood collection and/or injection (hereinafter referred to as 'blood collection, etc.').

The pressing unit 120 is provided to press the arm of the test subject supported by the support unit 100 . The compression unit 120 may be, for example, a tourniquet, a tourniquet, a tourniquet, or the like, and may be configured in various forms such as a belt type or a rubber band type. A cuff is a device used to apply pressure to a limb or limb to restrict (but not stop) the flow of blood. The compression unit 120 is positioned to compress the proximal portion of the subject's arm. Alternatively, the pressing unit 120 may be provided to press the upper arm, which is a shoulder side, rather than a point for blood collection, etc. on the arm of the subject. The compression unit 120 performs a function of making the veins well exposed by compressing the arm of the examinee before blood collection, etc. so that the veins are congested.

The near-infrared irradiator 130 is provided on the upper portion in a vertical direction with respect to the support 110 to irradiate the near-infrared rays to the arm of the subject (skin of the arm of the subject). The near-infrared irradiator 130 may irradiate near-infrared rays a predetermined number of times (eg, three times) or more to the arm (or the skin of the arm) of the subject to detect the subject's veins. Hereinafter, near-infrared rays will be briefly described. In the spectrum of light, the outer part of red is called infrared, and infrared has a longer wavelength than visible light. When the light emitted from sunlight or a heating element is dispersed in the spectrum, infrared is outside the end of the red spectrum, and the shortest wavelength among them is near-infrared. Infrared rays are generally used for industrial and medical purposes because they have a stronger thermal action than visible rays or ultraviolet rays. In addition to the thermal action, including the electron spectrum, near-infrared radiation exhibits photographic, photoelectric, and fluorescence effects, so detectors include photoelectric plates, photoelectrics, photoelectric tubes, thermocouples, phosphors, etc. this is used The photo-drying plate and the phototube can detect only the wavelength of 1.2㎛. It is used for disinfection, sterilization, and treatment of joints and muscles. Tungsten filament bulbs use near-infrared rays up to 3.5㎛.

In the present invention, the near-infrared irradiator 130 irradiates a near-infrared ray to the arm (or the skin of the arm) of the subject to confirm the position of the vein by the difference in absorbance between the vein and the skin (or general tissue, muscle, not venous blood vessels). used The near-infrared irradiator 130 irradiates near-infrared rays under the arm (or arm skin) of the subject, which is a target area, thereby transmitting the near-infrared rays to the inside of the skin including subcutaneous veins.

The near-infrared irradiator 130 irradiates near-infrared rays under the skin of the target region through the skin outside of the target region, so that the near-infrared rays are transmitted to the inside of the skin including veins. As an embodiment, the wavelength of the near-infrared irradiated by the near-infrared irradiator 130 may be changeable within a predetermined range. Accordingly, it is possible to observe the shape of the body organ under the target area according to the purpose. As another embodiment, the wavelength of the near-infrared irradiated by the near-infrared irradiator 130 may be 730 nm to 740 nm. Near infrared rays in the 730 nm to 740 nm region have a higher absorbance of deoxyhemoglobin than water, so it is suitable for visualization of venous blood flowing through veins.

FIG. 2 is a diagram for explaining the structure of the automatic vein searcher including the light quantity measuring unit 140 , and FIG. 3 is an exemplary view for explaining the function of the light quantity measuring unit 140 .

Referring to FIG. 2 , the light quantity measuring unit 140 measures the amount of light reflected from the arm of the subject according to the near-infrared irradiation. The light quantity measuring unit 140 may be provided under the near-infrared irradiator 130 and positioned so as to be in a straight line perpendicular to the support unit 110 . The support unit 110 and the light quantity measurement unit 140 may be positioned so that only the Z-axis is different from each other. That is, the light quantity measuring unit 140 is provided so as to be in a straight line (to be in the Z-axis direction) with the arm of the subject placed on the support unit 110, and absorbs the light reflected or emitted from the arm of the subject, and the amount of light can be measured.

Since the near-infrared irradiator 130 irradiates near-infrared rays a predetermined number of times (eg, three times) to the arm of the subject, the light quantity measurement unit 140 also reflects from the arm of the inspectee according to the irradiation of the near-infrared rays a predetermined number of times (eg, three times) The amount of light is measured a predetermined number of times. In addition, the light quantity measuring unit 140 records the measured light quantity, and may also identify a light reflection part on the subject's arm that matches or corresponds to each recorded (or measured) light quantity, that is, a light reflection position/point. To this end, the light quantity measuring unit 140 may be implemented as an LED (Light Emitting Diode) (panel) as an example. Hereinafter, a case in which the light quantity measuring unit 140 is implemented with an LED and a sensor will be described as an example to help understanding.

Usually, an LED is a device that emits light, but the LED can act as a multifunctional device that acts as a photosensor, so the amount of light absorbed by each LED device (or LED pixel) can be measured. The light quantity measuring unit 140 may record the amount of light absorbed for each LED element (or LED pixel) a predetermined number of times, and calculate a difference (or difference size) of the light amount for each predetermined number of times.

3 shows the vein boundary line in the arm of the subject. The part shown by the solid line is the vein boundary line. Point A is a point between the boundary lines of the vein sites, and points B and D are points on the vein boundary line, respectively. C is a point outside the boundary line of the vein site, and may be a point such as skin or muscle. There is almost no light emission on the vein boundary line for near-infrared irradiation, but the amount of light emission is high in areas other than the vein boundary line.

At point B, where the vein boundary line and general tissue meet (it is on the vein boundary line, so it comes into contact with the general tissue), if the luminescence amount is measured for a predetermined number of times, the deviation of the luminescence amount for each measurement due to the fine muscle movement in the general tissue will be large At points A and C, which are points other than the vein boundary line, there is little or no variation in the amount of light emitted during each measurement. Expressing this as a formula is as follows.

For example, the light emission amount measured the first time at point A is L _A,1 , the light emission amount measured the second time at point A is L _A,2 , the light emission amount measured the third time at point A is L _A,3 , and point B The luminescence amount measured the first time at LB _,1 , the luminescence quantity measured the second time at the point B is LB _,2 , and the luminescence quantity measured the third time at the point B is LB _,3 , and the luminescence quantity measured at the point C and D is called the first time. Measured luminescence was measured the second time at L _C,1 , L _D,1 , C and D, respectively, and the third measured at L _C,2 , L _D,2 , C and D, respectively. Let L _C,3 and L _D,3 be respectively.

In this case, │LA,1 - LA,2│ ≒ │LA,1 - LA,3│≒ │LA,2 - LA,3│. That is, the magnitude of each difference between the light emission amount measured at the first point at point A, the light emission amount measured at the second time at point A, and the light emission amount measured at the third time at point A is almost the same. Similarly, │L _C,1 -L _C,2 │ ≒ │L _C,1 -L _C,3 │≒│L _C,2 -L _C,3 │ and │L _A,1 -L _A,2 │ ≒│L _A,1 - L _A,3 │≒│L _A,2 - L _A,3 │≒│L _C,1 - L _C,2 │≒│L _C,1 - L _C,3 │≒│ L _C,2 - L _C,3 │ .

After all, │L _A,1 - L _A,2 │ ≒ │L _A,1 - L _A,3 │≒│L _A,2 - L _A,3 │≒│L _C,1 - L _C,2 │ ≒ │L _C,1 - L _C,3 │≒ │L _C,2 - L _C,3 │ < │L _B,1 - L _B,2 │ ≒ │L _B,1 - L _B,3 │≒ │L _B,2 - L _B,3 │≒ │L _B,1 - L _B,2 │ ≒ │L _B,1 - L _B,3 │≒│L _B,2 - L _B,3 │. The difference in light emission at points B and D on the vein boundary line is greater than the difference in light emission at points A and C at a site other than the vein boundary line by a predetermined range or more.

The light quantity measurement unit 140 measures the amount of light emitted at various points, such as points A, B, C, and D, for each predetermined number of times (here, three times are taken as an example), and measures the difference in the magnitude of the amount of light emitted for each number of times at each point. Calculate.

The vein detection unit 150 generates a virtual line by connecting positions where the difference in the amount of light emission measured at each point is within a predetermined range with dots, and generates a corresponding function (eg, a linear regression function, etc.) can do. The vein detection unit 150 may acquire the vein boundary line of the examinee corresponding to the points located on the virtual line. Here, if the virtual line is lowered in the vertical direction, it is matched with the vein boundary line of the examinee. That is, in the coordinates of the virtual line, the X and Y coordinate values are the same as the X and Y coordinate values of the vein boundary line of the subject.

The vein detection unit 140 detects a plurality of vein boundary lines having points B and D by connecting only the positions/points where the difference in the amount of light measured by the light amount measurement unit 140 is greater than a predetermined range for each number of times. can Here, the plurality of vein boundary lines means that the veins have boundary lines on both sides of the arm (or the arm skin) of the subject, so a line for separating the venous region from the region other than the vein can be called a venous boundary line. Here, as for the plurality of vein boundary lines, a boundary line passing through point B may be referred to as a first vein boundary line, and a boundary line passing through point D may be referred to as a second vein boundary line, and inside the first vein boundary line and the second vein boundary line corresponds to the venous region.

The vein detection unit 150 may determine a target venipuncture point to puncture the syringe within a predetermined range in the vicinity of the center between the first and second vein boundary lines. Preferably, the vein detection unit 150 may determine a center or an intermediate point within the first and second vein boundary lines as the target puncture point.

The syringe movement control unit 160 moves and controls the syringe to puncture the vein at a predetermined angle with respect to the target venipuncture point determined by the vein detection unit 150 . Here, the predetermined angle is an angle formed between the plane formed by the arm of the examinee and the syringe, and may be preferably between 10 and 20 degrees.

The syringe movement control unit 160 calculates a parabolic equation with the determined venipuncture point as the parabolic focus, then sets the slope for the syringe to puncture to the determined venipuncture point, and moves the syringe with the set slope and the calculated parabolic equation. However, it can be controlled to puncture the vein at the puncture point.

In general, since alcohol is disinfected near the puncture point before blood collection or injection, the automatic vein searcher according to the present invention is a disinfection unit (not shown in the figure) that can spray alcohol in the direction of the puncture point on the upper part of the subject's arm. ) may be further provided. The disinfection unit may be provided to be supported by the body frame of the automatic vein searcher. The disinfection unit may be provided to allow alcohol to be injected within a predetermined range based on the determined venipuncture point, and to change and control the alcohol injection point according to a change in the puncture point.

The syringe punctures the determined venipuncture point under the control of the syringe movement controller 160 . The spectrometer 170 may detect that the syringe is filled with blood extracted from the test subject. The spectrometer 170 is capable of analyzing the wavelength of light, so that the incident light is separated by wavelength using a grating. The spectrometer 170 can separate the wavelength of the light of the blood color, so that it can detect that the blood is filled in the syringe. To this end, the spectrometer 170 is provided between the near-infrared irradiator 130 and the support unit 110 in the vertical direction to detect that the syringe is filled with blood extracted from the subject. In addition, the spectrometer 170 can measure not only the wavelength of the light but also the intensity to detect whether or not the syringe is filled with blood over a predetermined range.

When the spectrometer 170 detects that the amount of blood extracted from the subject is greater than or equal to a predetermined range, the syringe separation control unit 190 separates the syringe from the determined venipuncture point to stop blood collection. The syringe may be a vacutainer (vacuum collection vessel) as a syringe for blood collection. In addition, the syringe may be of a type such as a catheter for blood collection and/or injection.

A catheter is a thin tube made by extrusion molding using medical materials and is used for various functions in the medical field. A catheter is a medical device that is inserted into the human body when handling a disease or performing an operation. A catheter is an intravascular tube syringe, which is a thin rubber or metal tube used to withdraw the contents of a patient's digestive tract, bladder, bronchi, or blood vessels, or, conversely, to inject drugs or detergents into the body. The catheter consists of a plastic needle (jelco), a wire (steel) inserted through the catheter, and a needle (needle). ) is a common blood draw and/or injection procedure.

If the purpose of the syringe is not to collect blood but to inject or inject intravascular fluid, the syringe may be of a catheter type. When the spectrometer 170 detects that the amount of blood extracted from the subject is filled in the tube of the catheter or the like is over a predetermined range, or when it is detected that the blood extracted from the subject is filled in the tube of the catheter, etc., the syringe separation control unit 190 ) separates the gel nose and stiletto of the catheter so that blood collection is stopped and the gel nose can be left punctured in the subject's vein for infusion of fluid, etc.

As such, the type of the syringe may be configured in various types such as a vacutainer (vacuum collecting vessel), a catheter, and the like, and is not limited by these two types.

On the other hand, since the light quantity measurement unit 140 fails to detect positions/points where the difference in light quantity (luminous quantity) is greater than a predetermined range for each predetermined number of times, the vein detection unit 150 also includes a vein region (eg, a plurality of vein boundary lines). is not detected, the compression unit controller 180 may control the compression unit 180 to re-compress the subject's arm or to press the subject's arm more than the first pressure. That is, since the vein detection unit 150 failed to detect the vein site, the compression unit 180 re-compresses the arm of the examinee or presses it more, so that the vein is more congested, so that the (proximal) vein is congested and is well exposed on the skin. let it be The part of the blood vessel close to the heart is called the proximal part, and the part farther away is called the distal part.

In addition, the vein detection unit 150 may generate a virtual line (line) by connecting only positions/points where the difference in the amount of light for each number of times measured a predetermined number of times is not greater than a predetermined range, in this case, the line is the vein boundary. It is recognized or regarded as a line in which venous blood vessels are located as it is within the line, or as a line in which general tissues and muscles are located as outside the vein.

4 is a diagram illustrating an example of a model of the automatic vein searcher 100 according to the present invention.

Referring to FIG. 4 , the automatic vein searcher 100 has a main body, and a support unit 110 for supporting the arm of the examinee is provided in the main body. As an example, as shown in FIG. 4 , the support part 100 may be provided to be inserted through the body for the convenience of blood collection, etc. of the examinee.

The support unit 110 is provided so that the arm of the subject (patient) is stably supported on the floor for blood collection and the like. The pressing unit 120 is provided to press the arm of the test subject supported by the support unit 100 . The near-infrared irradiator 130 is provided on the upper portion in a vertical direction with respect to the support 110 to irradiate the near-infrared rays to the arm of the subject. The spectrometer 170 is provided between the near-infrared irradiator 130 and the support unit 110 in the vertical direction to detect that the syringe is filled with blood extracted from the subject.

The syringe movement control unit 160 may be supported by the support unit 110 or the main body (body frame), and may move the syringe by performing a parabolic movement to the venipuncture point determined at a predetermined angle.

5 is a view showing the spectrometer 170 in the automatic vein searcher 100 according to the present invention.

Referring to FIG. 5 , the needle 220 of the syringe 200 is punctured at the determined venipuncture point 250 of the subject's vein 230 . The spectrometer 170 is provided vertically above the syringe 200 to detect that the syringe 200 is filled with the blood 260 extracted from the test subject.

If the purpose of the syringe 200 is not for blood collection, but for injection or injection of intravascular fluid, the syringe 200 may be a catheter type. When the spectrometer 170 detects that the amount of the blood 230 extracted from the test subject filled in the tube of the catheter 200 is over a predetermined range, or the blood 230 extracted from the test subject is transferred to the tube of the catheter 230, etc. When it is sensed that the syringe is filled, the syringe separation control unit 190 separates the gel nose and stiletto of the catheter 200 to stop blood collection and leave the gel nose punctured in the vein of the examinee for injection of fluid, etc. It can be left.

As described above, the automatic vein searcher according to an embodiment of the present invention automatically detects the vein of the examinee, and as blood collection and/or injection from the vein of the examinee is possible, it is possible to replace the role of the examiner/blood collection source. can have an effect.

As described above, when the automatic vein searcher according to an embodiment of the present invention is provided to a hospital with insufficient manpower, there is a significant effect in reducing manpower costs.

As described above, the automatic vein searcher according to an embodiment of the present invention has high vein detection accuracy of the examinee.

The embodiments described above are those in which elements and features of the present invention are combined in a predetermined form. Each component or feature should be considered optional unless explicitly stated otherwise. Each component or feature may be implemented in a form that is not combined with other components or features. It is also possible to configure embodiments of the present invention by combining some elements and/or features. The order of operations described in the embodiments of the present invention may be changed. Some features or features of one embodiment may be included in another embodiment, or may be replaced with corresponding features or features of another embodiment. It is apparent that claims that are not explicitly cited in the claims can be combined to form an embodiment or included as a new claim by amendment after filing.

It is apparent to those skilled in the art that the present invention may be embodied in other specific forms without departing from the essential characteristics of the present invention. Accordingly, the above detailed description should not be construed as restrictive in all respects but as exemplary. The scope of the present invention should be determined by a reasonable interpretation of the appended claims, and all modifications within the equivalent scope of the present invention are included in the scope of the present invention.

Claims (6)

a support for mounting the arm of the subject;
a pressing unit provided to press the arm of the subject on the support part;
a near-infrared irradiator provided on the upper portion of the support for irradiating near-infrared rays to the arm of the subject a predetermined number of times to detect the subject's veins;
a light quantity measuring unit measuring the amount of light reflected from the arm of the subject according to the near-infrared irradiation the predetermined number of times; and
Comprising a vein detection unit for detecting the vein site based on the measured amount of light and determining a target venipuncture point in the detected vein site,
The vein detection unit,
A plurality of vein boundary lines are detected by connecting only positions where the difference in the amount of light measured a predetermined number of times is greater than a predetermined range for each number of times,
and determining the target venipuncture point within a predetermined range in the vicinity of a center between the plurality of vein boundary lines. The method of claim 1,
The automatic vein searcher further comprising a syringe movement control unit for moving the syringe to puncture the vein at a predetermined angle to the target venipuncture point. 3. The method of claim 2,
Further comprising a spectrometer for detecting that the syringe is filled with the test subject's blood,
The syringe separation control unit separates the syringe from the target venipuncture point when the amount of blood filled in the spectrometer is greater than or equal to a predetermined range, automatic vein searcher. 3. The method of claim 2,
Further comprising a spectrometer for detecting that the syringe is filled with the test subject's blood,
The syringe corresponds to the catheter, and the syringe separation control unit separates the gel nose and stiletto of the catheter when the amount of blood filled in the spectrometer is greater than or equal to a predetermined range. The method of claim 1,
When the light quantity measurement unit fails to detect positions where the difference in light quantity is greater than a predetermined range for each number of times, and the vein detection unit also fails to detect the vein region, the compression unit presses the arm of the subject again or more strongly. Further comprising a compression unit control to control to do, automatic vein explorer. 3. The method of claim 2,
The vein detection unit generates a line by connecting only positions where the difference in light amount for each number of times measured a predetermined number of times is not greater than a predetermined range, but recognizes as a line within the vein boundary line or outside the vein, automatic vein Explorer.

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