Arterial blood sampling auxiliary device

Abstract

The present application relates to the field of medical auxiliary equipment and provides an arterial blood sampling auxiliary device, comprising a fixed portion and a light-emitting portion. The light-emitting portion is provided with a light-emitting body capable of generating light of a certain intensity in a certain direction. The light-emitting portion is mounted on the fixed portion in a manner that is rotatable relative to the fixed portion, so that the illumination direction of the light-emitting portion can be adjusted. At least two light-emitting portions are provided, and by adjusting the illumination direction of the light-emitting portion, different light-emitting portions can illuminate the same position. For different patients and different blood sampling locations, the illumination direction of the light-emitting portion can be adjusted so that more light is distributed near the artery, making the shadow of the artery more obvious. The use of multiple light-emitting portions can not only generate greater light intensity, but also enable the detection of deeper arteries. It is particularly suitable for use in people who have difficulty locating arteries due to excessive body fat, and can be used for arterial blood sampling in different locations such as the radial artery, brachial artery, and even femoral artery.

Description

Technical Field

[0001] The present application relates to the field of medical auxiliary equipment, and in particular to an arterial blood sampling auxiliary device. Background Art

[0002] Arterial blood sampling is commonly used for blood gas analysis. By measuring blood oxygen, carbon dioxide, pH, and other parameters, it comprehensively assesses a patient's respiratory function and acid-base balance, providing a basis for the diagnosis and treatment of conditions such as respiratory failure and acid-base imbalance. It is widely used clinically. Common arterial blood sampling sites include the radial, brachial, and femoral arteries. The radial artery is located on the outside of the wrist, superficially and easily palpated and pinpointed, making it one of the most commonly used blood sampling sites. Although the radial artery has relatively few peripheral nerves and blood vessels, blind puncture without clear guidance can easily damage peripheral nerves or result in unsuccessful punctures. Furthermore, the radial artery is located deeper in the arm, making it difficult to accurately locate. The radial artery is thin and prone to slippage, and repeated punctures increase pain. The brachial artery, located on the inside of the upper arm near the median nerve, is located deeper in the arm, requiring caution to avoid nerve damage. Accurately locating the brachial artery in obese patients can also be difficult. The femoral artery, located at the base of the thigh, is relatively large, boasts abundant blood flow, and offers a high success rate for blood collection. However, the femoral artery is adjacent to the femoral vein, making it easy to mistakenly insert blood into the vein during blood collection. Furthermore, the femoral artery carries a high risk of infection, making it typically chosen when puncture at other locations is impractical. Therefore, precise arterial positioning is crucial for blood collection.

[0003] Given the limitations of different arterial blood sampling sites, using auxiliary devices to determine the location of blood vessels is key to improving blood collection efficiency. There are two main types of existing angiography devices. One uses direct visible light illumination. While relatively inexpensive, visible light has limited penetration and cannot illuminate deeper areas. It is generally used for intravenous injections on the back of the hand and cannot be used for imaging deeper arteries. The other type uses infrared light for detection, but the human eye cannot detect infrared light. Therefore, infrared light must be detected by an instrument and then projected onto the skin through a projection structure. This structure is complex and costly, and therefore has not been widely adopted.

[0004] The Chinese patent application with the patent number "CN114209276A" and the name "A Vascular Imaging Device" discloses a vascular imaging device whose LED lamp beads are distributed in a ring shape, so that the light is relatively dispersed and is only suitable for viewing superficial blood vessels. If there is a lot of body fat, the effect is not ideal, especially for viewing the femoral artery.

[0005] The Chinese patent application with the patent number “CN106037674B” and the name “A vein imaging system based on hyperspectral imaging” discloses a vein imaging system, which has a complex structure and high cost.

[0006] The Chinese patent application with the patent number "CN106923792B" and the name "Reflective Ultra-Portable Human Superficial Vein Imaging Device" discloses a vein imaging device. However, the device also suffers from the problem of poor imaging when there is a lot of body fat. The device is only suitable for superficial vein imaging and has poor imaging effect on deeper veins. Summary of the Invention

[0007] The present application provides an arterial blood sampling auxiliary device that achieves more accurate blood sampling by improving the imaging effect.

[0008] According to the present application, an arterial blood sampling auxiliary device is provided, including a fixed part and a light-emitting part. The light-emitting part is provided with a light-emitting body that can generate light of a certain intensity in a certain direction. The light-emitting part is installed on the fixed part in a manner that is rotatable relative to the fixed part, so that the illumination direction of the light-emitting part can be adjusted. At least two light-emitting parts are provided, and by adjusting the illumination direction of the light-emitting part, different light-emitting parts can illuminate the same position.

[0009] Compared with the prior art, the arterial blood sampling auxiliary device of the present application has the following beneficial effects:

[0010] For different patients and different blood collection locations, the irradiation direction of the light-emitting part can be adjusted so that more light is distributed near the artery, making the shadow of the artery more obvious. The use of multiple light-emitting parts can not only produce greater light intensity and detect deeper arteries, but also enable intermittent use for shallower arterial visualization, avoiding overheating and damage of the light-emitting lamp beads, making arterial visualization clearer, reducing puncture time, and improving arterial blood collection efficiency. It can also be used for arterial blood collection in different locations such as the radial artery, brachial artery, and even the shallower femoral artery.

[0011] In one embodiment, the fixing portion is provided with multiple semicircular mounting slots or holes, which can be mounted on the light-emitting units. Installing multiple light-emitting units can provide more uniform light distribution. The semicircular mounting slots facilitate rotation of the light-emitting units, while the rectangular mounting holes allow the light-emitting units to be closer to the skin, resulting in more concentrated light and better arterial visualization.

[0012] In one embodiment, the light-emitting unit is equipped with a focusing lens and a reflector, enabling it to generate parallel light. Parallel light is more concentrated and can illuminate a greater distance. Parallel light is also easier to control in direction, allowing it to illuminate arteries from different angles. Existing divergent light techniques cannot visualize deeper arteries; only focused light can achieve better visualization.

[0013] In one embodiment, the light-emitting portion includes a first light-emitting portion and a second light-emitting portion. The first light-emitting portion can form a fan-shaped light source. The fan-shaped light source can have a larger illumination range, which can mainly make the skin and near-epidermal tissue have a certain degree of permeability under the action of light. The second light-emitting portion can form a strip light source. The strip light source has a longer illumination distance. The use of the strip light source can form a certain intensity of light near deeper arteries with better differentiation, which can better image the arteries. In particular, in some cases, it may be necessary to penetrate a longer distance to ensure the development effect.

[0014] In one embodiment, the light emitting portion is fixed to the fixing portion by a rotating positioning piece, which has a better fixing effect and prevents the angle of the light emitting portion from changing arbitrarily.

[0015] In one embodiment, the light emitting portion is provided with a rotary switch and the brightness of the light emitting body is controlled by rotation. Arteries at different depths require different brightness irradiation, which can achieve better imaging effects.

[0016] In one possible embodiment, the light-emitting portion is provided with a mechanical rotating timing device. Since a larger light intensity is required, the power is larger and the cost of setting up a heat dissipation structure is higher. If a heat dissipation structure is not provided, it cannot work for a long time. The mechanical timing device can be used to turn off the light-emitting body at a fixed time to avoid long-term use of the light-emitting body to generate high temperature and cause damage to the device.

[0017] In one embodiment, the fixing portion includes a fixing block and an elastic connecting block. The elastic connecting block is made of an elastic material and is connected to different fixing blocks at both ends. The different fixing blocks are connected by the elastic connecting block. The fixing block has a mounting slot for mounting the light-emitting portion. Different blood collection sites and different people have different shapes. The provision of the elastic connecting block can accommodate different shapes, provide more stable positioning, and achieve better imaging effects.

[0018] In one embodiment, the fixed part is provided with a blood collection frame, and the blood collection frame is provided with a blood collection bracket. The blood collection bracket can be installed with a blood collection device. There may be visual differences at different angles. The provision of the blood collection bracket can ensure that the needle moving plane and the blood vessel plane are in the same plane, thereby achieving more accurate blood collection.

[0019] In one embodiment, the blood collection bracket is provided with a sliding track that can slide relative to the blood collection frame, and the blood collection frame is provided with a laser bar emitting light, so that the blood collection position can be better positioned. In theory, the blood collection needle of the blood collection device and the laser bar are in the same plane to ensure the accuracy of puncture.

[0020] In one embodiment, the fixing portion is provided with a plurality of mounting chains, and adjacent mounting chains are hinged to each other by a hinge shaft so that the mounting chains can rotate relative to each other. A mounting hole is provided in the center of the mounting chain, and the mounting hole can install the light-emitting portion. The light-emitting portion is provided with a shell, and a second arc surface of a large semi-cylindrical surface is provided at one end of the shell. The mounting hole is provided with a third arc surface and a fourth arc surface matching the second arc surface, and the third arc surface and the fourth arc surface are respectively located on both sides of the mounting hole. The mounting chain includes a first matching portion, a second matching portion, a first arc-shaped connecting arm and a second arc-shaped connecting arm. The first matching portion is provided with a third arc surface on a side close to the second matching portion, and the second matching portion is provided with a fourth arc surface on a side close to the first matching portion. The two ends of the first matching portion and the second matching portion are connected by a first arc-shaped connecting arm and a second arc-shaped connecting arm. The first arc-shaped connecting arm and the second arc-shaped connecting arm are C-shaped. The first arc-shaped connecting arm and the second arc-shaped connecting arm have a certain elasticity and can be deformed within a certain range, that is, the distance between the two ends of the C can be changed. In this way, the fixing part forms a chain structure and the length can be adjusted according to actual needs. The first arc-shaped connecting arm and the second arc-shaped connecting arm are elastic, which can make the fixing part match different shapes in different positions, so that the position of the fixing part is more stable when worn.

[0021] The method for using the arterial blood sampling auxiliary device to collect blood from the radial artery mainly includes the following steps: first, fixing the fixing portion of the arterial blood sampling auxiliary device to a suitable position on the wrist; second, setting a fan-shaped light-emitting portion in front of the radial artery; setting a second strip-shaped light-emitting portion and a first strip-shaped light-emitting portion on both sides of the fan-shaped light-emitting portion and in front of the radial artery, respectively; the main light of the first strip-shaped light-emitting portion is irradiated on the area in front of the radius; the main light of the second strip-shaped light-emitting portion is irradiated on the area in front of the ulna; a third strip-shaped light-emitting portion is set behind the radius and pubic bone; the light of the third strip-shaped light-emitting portion is irradiated between the radius and ulna and emitted from the ulna side toward the radial side; third, adjusting the position and light intensity of each light-emitting portion based on the initial imaging of the radial artery to achieve the best imaging effect; finally, using the blood sampling device to collect blood. This method is suitable for most people, especially in cases where the radial artery is difficult to locate due to a thick arm, and can greatly improve blood collection efficiency and avoid the serious harm caused by multiple punctures to the patient.

[0022] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present application, nor is it intended to limit the scope of the present application. Other features of the present application will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and other objects, features and advantages of the exemplary embodiments of the present application will become readily understood by reading the detailed description below with reference to the accompanying drawings. In the accompanying drawings, several embodiments of the present application are shown in an illustrative and non-limiting manner, in which:

[0024] In the drawings, the same or corresponding reference numerals denote the same or corresponding parts.

[0025] Figure 1 A three-dimensional schematic diagram of an arterial blood sampling auxiliary device according to Example 1 of the present application is shown;

[0026] Figure 2 A front view schematic diagram of the arterial blood sampling auxiliary device according to Example 1 of the present application is shown;

[0027] Figure 3 A cross-sectional schematic diagram of the arterial blood sampling auxiliary device according to Example 1 of the present application is shown;

[0028] Figure 4 A three-dimensional schematic diagram of an arterial blood sampling auxiliary device according to Example 2 of the present application is shown;

[0029] Figure 5 A front view of the arterial blood sampling auxiliary device according to Example 2 of the present application is shown;

[0030] Figure 6 A cross-sectional schematic diagram of an arterial blood sampling auxiliary device according to Example 2 of the present application is shown;

[0031] Figure 7 A three-dimensional schematic diagram of the light-emitting portion of an embodiment of the present application is shown;

[0032] Figure 8 A three-dimensional schematic diagram of the structure of the rotating circuit board inside the light-emitting portion of an embodiment of the present application is shown;

[0033] Figure 9 A schematic diagram of the distribution of the luminous parts during radial artery blood sampling in an embodiment of the present application is shown.

[0034] Description of the numbers in the figure:

[0035] 1. Fixing part; 2. Light-emitting part; 3. Fixing belt; 4. Radius; 5. Radial artery; 6. Ulna; 7. Skin; 8. Subcutaneous tissue; 10. Mounting slot; 11. First arc surface; 12. Light-transmitting hole; 13. Fixing block; 14. Elastic connecting block; 15. Blood collection frame; 16. Blood collection bracket; 17. Semi-cylindrical groove; 18. Track; 19. Transmitting lamp; 20. Housing; 21. Second arc surface; 22. Focusing lens; 23. Reflector; 24. Circuit board; 25. Lamp beads; 26. Rotating positioning piece; 27. Mounting chain; 28. Articulated shaft; 29. ​​Rotating timing device; 30. Rotary switch; 2 00. Gear; 201. First light-emitting portion; 202. Second light-emitting portion; 203. Rectangular portion; 204. Semi-cylindrical portion; 205. Battery; 206. Cylindrical lens; 207. Rotating shaft; 208. Gear teeth; 209. Control lever; 221. Fan-shaped light-emitting portion; 222. Second strip-shaped light-emitting portion; 223. First strip-shaped light-emitting portion; 224. Third strip-shaped light-emitting portion; 271. Mounting hole; 272. Third arc surface; 273. Fourth arc surface; 274. First matching portion; 275. Second matching portion; 276. First arc-shaped connecting arm; 277. Second arc-shaped connecting arm; 281. Nut. DETAILED DESCRIPTION

[0036] In order to make the purpose, features, and advantages of this application more obvious and easy to understand, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of this application.

[0037] like Figure 1 、 Figure 3 and Figure 4 As shown, the arterial blood sampling auxiliary device includes a fixed portion 1 and a light-emitting portion 2. Light-emitting portion 2 is equipped with a light source capable of generating light of a certain intensity in a certain direction. Light-emitting portion 2 is rotatably mounted relative to fixed portion 1, allowing the illumination direction of light-emitting portion 2 to be adjusted. At least two light-emitting portions 2 are provided, and by adjusting the illumination direction of light-emitting portion 2, different light-emitting portions 2 can illuminate the same location. Fixed portion 1 is equipped with a fixing strap 3, which can be a conventional wristband with Velcro to adjust the length.

[0038] The light-emitting portion 2 can emit near-infrared light, red light, and some other visible light. Human blood vessels have a strong reflectivity for blue light, but tissues such as human skin strongly absorb blue light. If only blue light is used to illuminate the skin, the blue light is absorbed by the skin, and the location of the blood vessels is essentially indistinguishable. Blood vessels have a strong absorption capacity for red light and infrared rays. If near-infrared light is used to illuminate the skin, shadows will be formed at the blood vessels, while other locations will appear translucent under the light. To make the location of arteries more visible, red and yellow light can be increased and blue light reduced. Unwanted light can be filtered through a filter, and the wavelength of the light can be controlled to above 570 nanometers as much as possible. Red and yellow LED beads are preferred for light sources. Since both arteries and veins have a visual effect, it is difficult to distinguish them. However, arteries generally pulsate regularly, so whether they are arteries can be confirmed based on the pulsation. In addition, the approximate location of each artery can be confirmed based on the location of the bones.

[0039] Example 1:

[0040] like Figure 1 、 Figure 2 and Figure 3 As shown, the fixing portion 1 is provided with a plurality of semicircular mounting grooves 10 , and the mounting grooves 10 can be used to mount the light-emitting portion 2 .

[0041] The semicircular mounting groove 10 is provided with a first arc surface 11 in the shape of a semi-cylinder. The curvature of the first arc surface 11 is slightly greater than π, so that the opening position of the mounting groove 10 is slightly reduced. The elasticity can be used to slightly expand the opening when the light-emitting part 2 is installed. After the installation is completed, the light-emitting part 2 is directly limited by the opening structure, so that installation and disassembly are very convenient. The curvature of the first arc surface 11 can be set to 3.2-3.5. The light-emitting part 2 is provided with a shell 20. One end of the shell 20 is provided with a second arc surface 21 in the shape of a large semi-cylinder. The curvature of the second arc surface 21 is greater than the curvature of the first arc surface 11. The curvature of the second arc surface 21 can be set to 4.5-5. The radius of the first arc surface 11 is the same as the radius of the second arc surface 21 or the first arc surface 11 is slightly larger. In this way, the first arc surface 11 and the second arc surface 21 are fitted together during installation. The light-emitting part 2 can rotate a certain angle in the mounting groove 10. In order to increase the resistance to rotation, a rubber structure can be provided locally in the mounting groove 10 to increase friction.

[0042] like Figure 1 、 Figure 2 and Figure 3 As shown, in one embodiment, a rectangular light-transmitting hole 12 is provided at the bottom of the mounting groove 10, and the light emitted by the light-emitting unit 2 reaches the human skin through the light-transmitting hole 12. The light-emitting unit 2 can be provided with a cylindrical lens 206 or a focusing lens 22 to refract the divergent light emitted by the light source into parallel light.

[0043] In one embodiment, a plurality of light-emitting parts 2 are provided and inserted into the mounting grooves 10 respectively. The number of light-emitting parts 2 can be increased or decreased according to actual needs. The deeper the artery is located, the more light-emitting parts 2 are required. The needs of different people are also different. In addition, the brightness can be adjusted to meet different needs.

[0044] In one embodiment, the light emitting unit 2 is provided with a focusing lens 22 and a reflector 23 so that the light emitting unit 2 can generate parallel light. The convex lens can generate focused light, and the reflector 23 can increase the light intensity, so that the lighting effect is better. Figure 3 As shown, the focusing lens 22 can be a cylindrical lens 206, the reflector 23 is also in the shape of a long strip, the light-emitting portion 2 is provided with a long circuit board 24, and the circuit board 24 is provided with a plurality of lamp beads 25 arranged along a straight line, which can generate strip-shaped light under the action of the cylindrical lens 206.

[0045] In one embodiment, the light-emitting part 2 is fixed to the fixed part 1 by a rotating positioning piece 26. The rotating positioning piece 26 is provided with a thread to determine the position. The radius of the rotating positioning piece 26 is greater than the radius of the light-emitting part 2 so that the rotating positioning piece 26 directly abuts against the fixed part 1 to achieve positioning.

[0046] In one embodiment, the light emitting portion 2 is provided with a rotary switch 30 and the brightness of the light emitting body is controlled by rotation. Different depths require different brightness, and the rotary switch 30 is more convenient to control.

[0047] In one embodiment, the light-emitting portion 2 is provided with a mechanical rotating timing device 29, which is linked to the light-emitting body switch to automatically turn off the power of the light-emitting body at a certain time. The rotating timing device 29 controls the time length according to the rotation angle, which is very convenient to use.

[0048] In one embodiment, the fixing part 1 includes a fixing block 13 and an elastic connecting block 14. The elastic connecting block 14 is made of elastic material and is connected to different fixing blocks 13 at both ends. The different fixing blocks 13 are connected through the elastic connecting block 14. The fixing block 13 is provided with an installation groove 10 to install the light-emitting part 2.

[0049] like Figure 1 、 Figure 2 and Figure 3As shown, as another embodiment, the fixed block 13 is made of a transparent material, so there is no need to open a rectangular light-transmitting hole 12. The light-emitting part 2 can directly transmit light through the fixed block 13 to the human skin. Since the refractive index of different media is different, the refractive index of the fixed object is usually greater than the refractive index of air. In this way, the light-emitting part 2 rotates a smaller angle, and the refraction through the fixed block 13 can achieve a larger deflection angle, which plays a role of angle magnification, similar to the role of a prism. Therefore, the rotation space requirement for the light-emitting part 2 is smaller, and more light-emitting parts 2 can be set to increase the depth of development and adapt to more arterial blood sampling. For example, the femoral artery blood sampling depth is large, and more light-emitting parts 2 need to be set to achieve better development.

[0050] In one embodiment, the fixing portion 1 is provided with a blood sampling frame 15 , the blood sampling frame 15 is provided with a blood sampling bracket 16 , the blood sampling bracket 16 can be installed with a blood sampling device, and the blood sampling bracket 16 is provided with a semi-cylindrical groove 17 for installing a blood sampling syringe.

[0051] In one embodiment, the fixing portion 1 is provided with a fixing strap 3, and the fixing strap 3 is provided with a Velcro. Adjusting the position of the Velcro can change the effective length of the fixing strap 3 so as to fix the strap to different positions, such as the wrist, arm, thigh, or instep.

[0052] In one embodiment, the blood sampling support 16 is provided with a slidable dovetail groove track 18 that can slide relative to the blood sampling frame 15. The blood sampling frame 15 is provided with a laser bar emitting lamp 19. The laser bar emitting lamp 19 is arranged relative to the blood sampling support 16. The laser bar emitting lamp 19 can emit a long linear laser spot on the human skin. The laser bar is first adjusted to the corresponding position of the artery. When performing arterial blood sampling, it is sufficient to ensure that the blood collection needle and the laser bar are in the same plane. In this way, the blood collection operation can be performed with the light-emitting part 2 turned off. Of course, in general, it is easier to collect blood with the light-emitting part 2 turned on. However, if the light-emitting part 2 has a high power, it cannot be turned on for a long time. In more complex situations, if the blood collection operation cannot be completed in a short time, the light-emitting part 2 can be turned off and the blood collection operation can continue.

[0053] Example 2:

[0054] like Figure 4 、 Figure 5 and Figure 6As shown, the fixed portion 1 is provided with multiple mounting chains 27, which can be configured as needed, but generally at least four are provided. Adjacent mounting chains 27 are hingedly connected to each other via hinge shafts 28, allowing relative rotation between the mounting chains 27. A mounting hole 271 is defined in the center of each mounting chain 27. This rectangular mounting hole 271 is adapted to accommodate the light-emitting portion 2. The light-emitting portion 2 is provided with a housing 20, one end of which is provided with a second, semi-cylindrical, curved surface 21. The mounting hole 271 is provided with a third and fourth curved surfaces 272 and 273 that mate with the second curved surface 21. The third and fourth curved surfaces 272 and 273 are located on either side of the mounting hole 271, respectively.

[0055] In one embodiment, the mounting chain 27 includes a first matching portion 274, a second matching portion 275, a first arc-shaped connecting arm 276, and a second arc-shaped connecting arm 277. The first matching portion 274 is provided with a third arc surface 272 on the side close to the second matching portion 275, and the second matching portion 275 is provided with a fourth arc surface 273 on the side close to the first matching portion 274. The first matching portion 274 and the second matching portion 275 are connected at both ends by the first arc-shaped connecting arm 276 and the second arc-shaped connecting arm 277. The first arc-shaped connecting arm 276 and the second arc-shaped connecting arm 277 are C-shaped. The first arc-shaped connecting arm 276 and the second arc-shaped connecting arm 277 have a certain elasticity and can be deformed within a certain range, that is, the distance between the two ends of the C can be changed, so that the distance between the third arc surface 272 and the fourth arc surface 273 also changes, which facilitates the installation of the light-emitting portion 2 on the mounting chain 27. The mounting chain 27 can adopt a chain structure similar to a watchband, with adjacent mounting chains 27 connected end to end. A certain gap is provided at the hinged position of the mounting chain 27, allowing for a smaller rotation angle perpendicular to the axis, making it easier to secure to surfaces of various shapes. The first and second curved connecting arms 276, 277 can be bent to varying degrees, varying their lengths, making it easier to secure the mounting chain 27 to tapered surfaces. A mounting chain 27 employing this structure eliminates the need for a blood collection frame 15, and a larger mounting chain 27 provides ample space for blood collection.

[0056] In one embodiment, the light-emitting portion 2 includes a first light-emitting portion 201 and a second light-emitting portion 202. The first light-emitting portion 201 can form a fan-shaped light source, and the second light-emitting portion 202 can form a strip-shaped light source. The fan-shaped light source is relatively simple. Ordinary light sources have a certain divergence, that is, close to a fan-shaped light source. A reflector 23 is also used to make the light more concentrated, and it can be directed in a certain direction. The strip-shaped light source requires the reflector 23 or the focusing lens 22 to have a focusing function, which can form a large amount of parallel light. At least the divergent light needs to be focused onto a straight line, which can also be achieved using a cylindrical lens 206. The fan-shaped light source is more divergent than the strip-shaped light source, and the fan-shaped light source can also be directly replaced by an ordinary light source. In one embodiment, to ensure hygiene, the fixed portion 1 is made of plastic material and can be discarded after one-time use. A transparent shell is provided on the outside of the light-emitting portion 2. The transparent shell is disposable, and the light-emitting portion 2 is reusable.

[0057] In one embodiment, a nut 281 is provided on the hinge shaft 28. By adjusting the nut 281, the resistance to relative rotation between the mounting chains 27 can be controlled. The increase in resistance can fix the mounting chain 27 at a certain angle without changing, which makes it convenient to adjust the incident angle and position of the light-emitting portion 2 to ensure a better development effect.

[0058] like Figure 6 、 Figure 7 and Figure 8 As shown, in one embodiment, the shell 20 of the light-emitting portion 2 includes a rectangular portion 203 and a semi-cylindrical portion 204, a battery 205 is provided in the rectangular portion 203, a circuit board 24 and a lamp bead 25 are provided in the semi-cylindrical portion 204, a cylindrical lens 206 is provided below the lamp bead 25, the circuit board 24 is arranged on a plane parallel to the XY plane, a rotating shaft 207 is provided at the rear center of the circuit board 24 so that the circuit board 24 rotates around the rotating shaft 207 in the Z-axis direction perpendicular to the circuit board 24, and gear teeth 208 are provided on the edge of the circuit board 24, and the gear teeth 208 match the gear 200 of the control rod 209 so that the control rod 209 can rotate to drive the circuit board 24 to rotate around the rotating shaft 207, so that the angle of the light of the light-emitting portion 2 can be adjusted so that as much light as possible is irradiated on the artery position.

[0059] like Figure 9As shown in one embodiment, the figure shows a schematic cross-sectional view of the wrist, with the radius 4 on the left, the radial artery 5 on the lower left side, and the ulna 6 on the right. The double arrows represent the emission of parallel light. The skin 7 and subcutaneous tissue 8, muscle tissue, connective tissue, etc., absorb little red light. Therefore, red light is emitted as much as possible toward or behind the radial artery 5, where it absorbs more red light. As a result, the radial artery 5 reflects less red light, while the subcutaneous tissue 8 reflects or scatters more infrared light. This allows the shadow of the radial artery 5 to be displayed at the location of the radial artery 5. For obese individuals, multiple light-emitting units 2 may be needed to illuminate the radial artery 5 from different angles. For example, a light-emitting unit 2 can be placed in the gap between the radius 4 and ulna 6. Only the parallel light of the present application can provide strong light through the gap between the radius 4 and ulna 6, achieving better imaging results. The existing technology, which uses only unilaterally dispersed light, makes it difficult to achieve deeper arterial imaging. The present invention can achieve deeper arterial imaging.

[0060] like Figure 9 As shown, the method for sampling blood from the radial artery 5 mainly includes the following steps: first, fix the fixing part 1 of the arterial blood sampling auxiliary device at a suitable position on the wrist; secondly, set a fan-shaped light-emitting part 221 in front of the radial artery 5, and set a second strip-shaped light-emitting part 222 and a first strip-shaped light-emitting part 223 on both sides of the fan-shaped light-emitting part 221 and in front of the radial artery 5. The main light of the first strip-shaped light-emitting part 2 is irradiated on the front area of ​​the radius 4, and the main light of the second strip-shaped light-emitting part 222 is irradiated on the front area of ​​the ulna 6. A third strip-shaped light-emitting part 224 is set behind the radius 4 and the pubic bone. The light of the third strip-shaped light-emitting part 224 is irradiated between the radius 4 and the ulna 6 and is emitted from the side of the ulna 6 toward the side of the radius 4; again, according to the preliminary development of the radial artery 5, adjust the position and light intensity of each light-emitting part 2 to achieve the best development effect; finally, use the blood sampling device to collect blood. This method is suitable for most people, especially when it is difficult to determine the position of the radial artery 5 due to a thick arm. It can greatly improve the efficiency of blood collection and avoid multiple punctures causing greater harm to the patient.

[0061] It should be understood that the various forms of the processes shown above can be used to reorder, add, or delete steps. For example, the steps described in this application can be performed in parallel, sequentially, or in a different order, as long as the desired results of the technical solution of this application can be achieved. This is not limited herein.

[0062] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0063] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. An arterial blood sampling auxiliary device, characterized in that: The invention comprises a fixing part (1) and a light-emitting part (2), wherein the light-emitting part (2) is provided with a light-emitting body capable of generating light of a certain intensity in a certain direction, the light-emitting part (2) is mounted on the fixing part (1) in a manner rotatable relative to the fixing part (1), so that the irradiation direction of the light-emitting part (2) can be adjusted, at least two light-emitting parts (2) are provided, and by adjusting the irradiation direction of the light-emitting part (2), different light-emitting parts (2) can irradiate the same position, the light-emitting part (2) is provided with a focusing lens (22) so that the light-emitting part (2) can generate parallel light, and the fixing part (1) is provided with a fixing belt (3), and the fixing belt (3) fixes the fixing part (1) to the wrist, arm, thigh or instep; The fixing portion (1) comprises a fixing block (13) and an elastic connecting block (14), wherein the elastic connecting block (14) is made of an elastic material and is connected to different fixing blocks (13) at both ends, and the different fixing blocks (13) are connected via the elastic connecting block (14), and the fixing block (13) is provided with a mounting groove (10) capable of mounting the light-emitting portion (2); Alternatively, the fixing portion (1) is provided with a plurality of mounting chains (27), adjacent mounting chains (27) are hinged to each other via hinge shafts (28) so that the mounting chains (27) can rotate relative to each other, and a mounting hole (271) is provided at the center of the mounting chain (27), and the mounting hole (271) can be used to mount the light-emitting portion (2).

2. The arterial blood sampling auxiliary device according to claim 1, characterized in that: The light-emitting portion (2) comprises a first light-emitting portion (201) and a second light-emitting portion (202); the first light-emitting portion (201) can form a fan-shaped light source, and the second light-emitting portion (202) can form a strip-shaped light source.

3. The arterial blood sampling auxiliary device according to any one of claims 1-2, characterized in that: The fixing portion (1) is provided with a plurality of semicircular mounting grooves (10) or mounting holes (271), and the mounting grooves (10) or the mounting holes (271) are capable of mounting the light-emitting portion (2).

4. The arterial blood sampling auxiliary device according to claim 3, characterized in that: The light-emitting portion (2) is provided with a rotary switch (30) and controls the brightness of the light-emitting body by rotation. The light-emitting portion (2) is also provided with a mechanical rotary timing device (29).

5. The arterial blood sampling auxiliary device according to claim 4, characterized in that: The fixing portion (1) is provided with a blood sampling frame (15), and the blood sampling frame (15) is provided with a blood sampling bracket (16), and the blood sampling bracket (16) can be installed with a blood sampling device.

6. The arterial blood sampling auxiliary device according to claim 5, characterized in that: The blood sampling support (16) is provided with a slidable track (18) capable of sliding relative to the blood sampling frame (15), and the blood sampling frame (15) is provided with a laser strip emitting lamp (19).

7. The arterial blood sampling auxiliary device according to claim 3, characterized in that: The light-emitting portion (2) is fixed to the fixed portion (1) via a rotating positioning piece (26).

8. The arterial blood sampling auxiliary device according to any one of claims 1-2, characterized in that: The light-emitting portion (2) is provided with a shell (20), one end of the shell (20) is provided with a second arc surface (21), the mounting hole (271) is provided with a third arc surface (272) and a fourth arc surface (273) matching the second arc surface (21), the third arc surface (272) and the fourth arc surface (273) are respectively located on both sides of the mounting hole (271), the mounting chain (27) comprises a first matching portion (274), a second matching portion (275), a first arc-shaped connecting arm (276) and a second arc-shaped connecting arm (277), the first matching portion (274) is close to the side of the second matching portion (275), The third arc surface (272) is provided, and the fourth arc surface (273) is provided on the side of the second matching portion (275) close to the first matching portion (274). The first matching portion (274) and the second matching portion (275) are connected at both ends by the first arc connecting arm (276) and the second arc connecting arm (277). The first arc connecting arm (276) and the second arc connecting arm (277) form a C shape. The first arc connecting arm (276) and the second arc connecting arm (277) have a certain elasticity and can be deformed within a certain range, that is, the distance between the two ends of the C shape can be changed.

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