Vascular puncture guiding instrument

Abstract

A blood vessel puncture guiding instrument comprises a fingerstall. The blood flow monitoring sensor is arranged at the finger pad position; the distance measuring sensor is arranged at the second end of the fingerstall; the distance measuring sensor is used for monitoring the distance L1 from the distance measuring sensor to the punctured skin in the direction perpendicular to the connecting line of the blood flow monitoring sensor and the distance measuring sensor; the distance between the distance measuring sensor and the blood flow monitoring sensor is L2 which is a consistent fixed distance, or a distance sensing unit is specially arranged on each of the distance measuring sensor and the blood flow monitoring sensor, and L2 is obtained through the two distance sensing units; l1 is perpendicular to L2 all the time, a right triangle with L1 and L2 as right-angle sides is constructed, the inclination angle between L2 and the puncture plane where the puncture skin is located is a, and the angle of a is obtained through the formula tana = L1 / L2; the first prompting structure is used for prompting the monitored blood flow; the prompting structure II is used for prompting that the value a or L1 is monitored; when the first prompt structure and the second prompt structure send out prompt signals at the same time, puncture is guided. The structure is integrated on the fingerstall, and the device is small in size and easy and convenient to operate.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical devices, and in particular to the field of various devices for vascular puncture, and specifically to a vascular puncture guiding device. Background Art

[0002] In clinical work, needlestick injuries occur from time to time. Nursing staff are a high-risk group for needlestick injuries. Previous studies have found that the incidence of needlestick injuries among nursing staff in my country is as high as 76.55%. The risk of needlestick injury exposure accompanies the entire process of diagnosis and treatment activities, which can easily cause the spread of blood-borne diseases and affect the physical and mental health of medical staff. Therefore, it is urgent to strengthen the prevention of nurses in practice, and the simplest and most convenient way to prevent it is to wear medical gloves, but wearing ordinary medical gloves will reduce sensitivity and affect nurses' judgment of blood vessels.

[0003] The patent application with the authorization announcement number CN207821186U and the name of "A rubber glove for blood sampling or infusion" discloses a rubber glove for blood sampling or infusion. The rubber glove is durable and easy to operate and use, which improves the user's touch feeling of touching the blood vessels and better ensures the accuracy of touching the blood vessels. However, it still has the following disadvantages: the glove is mainly based on the feeling of finger touch, which is only suitable for patients with shallow and protruding veins. Nurses rely on subjective feelings to touch the blood vessels, and cannot ensure the accuracy of the location of the blood vessels. The gloves rely on people's subjective feelings to find veins, which will prolong the operation time and bring inconvenience to patients and nurses.

[0004] In addition, even if the blood vessel corresponding to the puncture point is found, the determination of the puncture angle depends more on the experience of the nursing staff. The wrong angle is also an important reason for puncture failure. Therefore, how to use instruments to find the blood vessels and determine the puncture angle after finding them is a technical problem that needs to be solved.

[0005] In view of the above technical problems, the present invention provides a blood vessel puncture guiding device. Summary of the invention

[0006] In view of the problem that the location and angle of blood vessel puncture are both dependent on the experience of nursing staff and are difficult to find and determine, if a blood flow monitoring structure is added to the fingertip position of the conventional finger cuff and a distance sensor is set at the rear end of the finger cuff; and the distance between the distance sensor and the blood flow monitoring structure is determined and known, a distance perpendicular to the line connecting the distance sensor and the blood flow monitoring structure and the distance from the distance sensor to the corresponding plane of the punctured skin is obtained through the distance sensor, and the inclination angle of the finger is calculated using trigonometric functions. When the inclination angle of the finger is consistent with the required puncture angle, the inclination angle of the finger can represent the angle for guiding the puncture, and then the finger position is maintained as a reference, and the puncture can be performed directly to the puncture point where the blood flow is detected at an accurate angle, and the puncture is completed accurately. In this way, the blood flow is monitored by the blood flow monitoring structure, and the puncture point is determined, and then an effective guiding puncture angle is obtained by using the finger inclination angle obtained by the distance sensor and the blood flow monitoring structure. The accuracy and effectiveness of the puncture can be greatly improved by setting the two structures. The whole process depends on the finger cuff and the structure on it, and the device is compact as a whole.

[0007] The specific technical solution is: a vascular puncture guide device comprising: The finger sleeve has a first end for the finger pad and a second end for the finger insertion end; The blood flow monitoring sensor is set at the fingertips to monitor blood flow in real time and send out blood flow signals; The distance measuring sensor is arranged at the second end of the finger sleeve; it is used to monitor the distance L1 from the distance measuring sensor to the punctured skin along the direction perpendicular to the connection line between the blood flow monitoring sensor and the distance measuring sensor; The distance between the distance measuring sensor and the blood flow monitoring sensor is L2, which is a consistent fixed distance, or a distance sensing unit is specially set on the distance measuring sensor and the blood flow sensor respectively, and L2 is obtained through the two distance sensing units; L1 and L2 are always perpendicular, and a right triangle with L1 and L2 as right angles is constructed, and the inclination angle of L2 and the puncture plane where the punctured skin is located is a; the angle a is obtained by the formula tana=L1 / L2; Prompt structure 1, when obtaining a valid blood flow signal, controls it to give a prompt and sends a prompt signal; The prompt structure 2, when obtaining the required a value or the signal of the value of L1 corresponding to a, controls it to prompt and sends a prompt signal; When the prompt structure 1 and the prompt structure 2 send out prompt signals simultaneously, puncture is guided.

[0008] Furthermore, in order to better realize the transmission of signals, a control unit is provided to store effective arterial and / or venous blood flow signals, receive blood flow signals from blood flow sensors in real time, and send effective blood flow signals to prompt structure 1 after receiving effective arterial or venous blood flow signals. The control structure also receives the real-time value of L1, and can calculate the angle a in real time according to the value of L1, or the control structure stores the L1 value of the required angle calculated in advance; when the control structure receives the required a value or L1 value, it sends the value to prompt structure 2. By providing an effective control unit, the required information can be effectively stored and calculated, and signals can be sent to the prompt structure according to the required blood flow signal and angle signal.

[0009] Further, after receiving a blood flow signal within an effective range, the prompt structure 1 prompts that the closer to the optimal blood flow signal, the higher the signal strength emitted by the prompt structure 1. The prompt structure 2 receives an a value within an effective range or an L value within an effective range, and the closer to the optimal value, the higher the signal strength emitted by the prompt structure 2.

[0010] More specifically, there are the following situations: First, prompt structure 1 is a display light, where the vein is a blue flashing light and the vein is a red flashing light; the closer to the optimal blood flow signal, the higher the flashing frequency of the light; prompt structure 2 is also display light 2; because different puncture angles are suitable for different puncture needs; venous blood collection: 30°, intravenous infusion: 15-30°, intradermal injection 5°; 90 degrees is a vertical needle insertion, no need to find an angle, just find the appropriate blood flow and perform the puncture directly. For 5°; 15°; 30°, three colors of color lights are set respectively, and there are three different L values ​​or a values ​​in the control structure; when the corresponding value is reached, the control structure controls the corresponding light of prompt structure 2 to flash.

[0011] In the second case, the prompt structure 1 and the prompt structure 2 are combined into a display structure that can display the blood flow velocity and a value in real time. The display structure displays the blood flow velocity of the artery and vein respectively, and displays the a value in real time; when a signal related to the arterial or venous blood flow velocity or the range of a value is received, the relevant area of ​​the display screen flashes. The operating nurse adjusts the angle and position by observing the specific values ​​and the patient's condition.

[0012] Furthermore, the puncture types are classified and selected in the control structure, or different puncture auxiliary instruments are set according to different puncture methods.

[0013] Furthermore, in the specific clinical process, because some patients have thick subcutaneous fat tissue, it is difficult to find blood vessels, or the blood flow rate of the found blood vessels is very slow. If the puncture is performed according to the puncture angle of conventional patients, the puncture is often inaccurate. Therefore, it is necessary to determine the best puncture angle according to the blood flow rate. Generally, the slower the blood flow rate, the larger the puncture angle needs to be selected within the appropriate puncture angle range. The above-mentioned instrument can be used to input the blood flow rate and puncture angle of some difficult clinical patients with successful punctures into the machine learning system, and the corresponding relationship between the blood flow rate and the puncture angle of different difficult patients can be obtained through the neural network of machine learning, and the obtained results are stored in the control structure. In this way, after the blood flow rate corresponds to the puncture angle, the display light flashes to prompt the operator that the operation can be performed.

[0014] Furthermore, the finger sleeve is an elastic sleeve that is sleeved on the outside of the medical glove and can be stably sleeved on the finger.

[0015] Furthermore, in order to ensure the accuracy of tilt angle monitoring and avoid bending of the finger during operation, an anti-bending structure is set on the inside or outside of the finger cuff. The anti-bending structure fits on the finger cuff and will not interfere with the blood flow sensor in finding the blood vessel.

[0016] Furthermore, the anti-bending structure includes 1-3 anti-bending straight rods arranged along the longitudinal axis of the finger sleeve, at least one anti-bending straight rod is arranged on the outer side of the finger sleeve corresponding to the back of the finger, and the anti-bending straight rods also include 2 on both sides; the three anti-bending straight rods are arranged within the range of 180° semicircle of the finger sleeve. The arrangement of such anti-bending straight rods can effectively prevent the finger from bending during the detection process, and because no anti-bending straight rods are arranged in the finger surface area opposite to the back of the finger, and the anti-bending straight rods are arranged at intervals, the arrangement of the anti-bending straight rods will not affect the elastic finger sleeve being arranged on the finger.

[0017] Furthermore, extension plates are arranged on both sides of the middle position of the two sides of the finger sleeve, and the extension plates can be connected with the anti-bending straight rods on both sides; prompt structure 1 and prompt structure 2 are arranged above the extension plates, and a distance measuring sensor is arranged below the extension plates. In this way, effective setting positions can be set for each structure.

[0018] Furthermore, an arc rod is provided in the same plane as the extension plate, and the arc center of the arc rod is the center of the blood flow monitoring sensor; the arc rod is provided at the second end of the finger sleeve, and a movable puncture guide structure is provided on the arc rod, and the puncture guide structure includes a micro laser generator, and the micro laser generator emits a laser line toward the blood flow monitoring sensor. Because the arc rod moves with the finger sleeve, the laser line emitted by the micro laser generator thereon can represent the puncture direction. The purpose of this structural setting is that when a suitable puncture angle is found through the finger with the finger sleeve, and it is impossible to puncture directly near the finger, an effective laser guide line can be obtained at other required positions through the puncture guide structure moving along the arc rod, and accurate puncture guidance can be performed at the required position through the laser guide line.

[0019] Furthermore, a combination hole is provided on the puncture guide structure, which is consistent with the cross section of the arc-shaped rod, and the puncture guide structure is combined with the arc-shaped rod and the puncture guide structure is moved on the arc-shaped rod through the combination hole.

[0020] Furthermore, the arc rod is symmetrically arranged on both sides of the finger sleeve, and the overall curvature range of the arc rod is 150-180 degrees. This angle range can cover substantially all suitable puncture positions.

[0021] The beneficial effects of the present invention are: By arranging a blood flow monitoring sensor and a distance measuring sensor on the finger cuff, the puncture point can be known through the blood flow sensor, and the distance L1 to the punctured skin measured by the distance measuring sensor can be compared with the known distance between the distance measuring sensor and the blood flow monitoring sensor as L2; ​​the angle at which the finger is lifted can be obtained in real time, and a prompt can be given after comparing the measured angle with the angle required for puncture, and an effective puncture guiding direction can be given through the angle of the finger on the table; finally, the puncture position and puncture angle guidance are achieved by knowing the puncture position, and the overall device is compact, and the design is simple and reasonable.

[0022] By displaying the blood flow velocity and the finger lifting angle a in real time through the display structure, an optimal puncture angle within a suitable puncture angle range can be found for some difficult patients according to the effective blood flow velocity displayed.

[0023] By setting an anti-bending straight rod, monitoring errors caused by bending of fingers during finger lifting can be avoided, thereby improving the accuracy of monitoring.

[0024] Through the cooperation of the arc plate and the movable puncture guide structure thereon which can emit a laser guide line toward the blood flow monitoring sensor, the puncture guide line can be transferred to a position other than the finger, while effectively maintaining the original puncture angle, so that it can be guided in a better guiding position. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention in which the first end of the finger sleeve is closed; Figure 2 This is a schematic diagram of the overall structure of an embodiment of the present invention in which a small opening is provided at the first end of the finger sleeve; Figure 3 This is a schematic diagram of the overall structure of the present invention from the bottom and side; Figure 4 It is a schematic diagram of the overall structure of an embodiment of the present invention with a curved plate and a puncture guide structure; Figure 5 It is a schematic diagram of the structure of the embodiment of the present invention with a curved plate and a puncture guide structure in a puncture plane state; Figure 6 It is a schematic diagram of the state structure of the puncture guide structure and the blood flow monitoring sensor of the present invention; Figure 7 It is a schematic diagram of the distance measuring sensor and the blood flow monitoring sensor of the present invention and the constructed right triangle structure; Figure 8 A flow chart of signal receiving and sending of the control unit of the present invention; Description of main reference numerals 1. Finger sleeve; 11. Small opening; 2. Blood flow monitoring sensor; 3. Distance measuring sensor; 4. Prompt structure one; 5. Prompt structure two; 6. Control unit; 7. Puncture plane; 8. Anti-bending straight rod; 81. Elastic ring; 9. Extension plate; 10. Arc rod; 101. Puncture guide structure; 102. Micro laser generator; 103. Combination hole. DETAILED DESCRIPTION

[0026] refer to Figure 1-8 A blood vessel puncture guiding instrument comprises a finger cuff 1, the first end of which is the finger pad end, and the second end is the finger insertion end; a blood flow monitoring sensor 2 is arranged at the finger pad position, and is used to monitor the blood flow in real time and send out a blood flow signal; a distance measuring sensor 3 is arranged at the second end of the finger cuff 1; it is used to monitor the distance L1 from the distance measuring sensor 3 to the punctured skin along the direction perpendicular to the connection direction of the blood flow monitoring sensor 2 and the distance measuring sensor 3; the distance between the distance measuring sensor 3 and the blood flow monitoring sensor 2 is L2, which is a consistent fixed distance, or a distance sensing unit is specially arranged on the distance measuring sensor 3 and the blood flow sensor respectively, and L2 is obtained through the two distance sensing units; L1 and L2 are always perpendicular, constructing a right triangle with L1 and L2 as right-angled sides, and the inclination angle of L2 to the puncture plane 7 where the punctured skin is located is a; the angle a is obtained by the formula tana=L1 / L2; It also includes a prompt structure 1 4, which controls the prompt structure to give a prompt and send a prompt signal when a valid blood flow signal is obtained; and a prompt structure 2 5, which controls the prompt structure to give a prompt and send a prompt signal when a signal of the required a value or the L1 value corresponding to a is obtained; when the prompt structure 1 4 and the prompt structure 2 5 send prompt signals at the same time, puncture is guided.

[0027] A control unit 6 is also provided to store effective arterial and / or venous blood flow signals, receive blood flow signals from a blood flow sensor in real time, and send effective blood flow signals to a prompt structure 1 4 after receiving effective arterial or venous blood flow signals. The control structure also receives the real-time value of L1, and can calculate the angle a in real time according to the value of L1, or the control structure stores the L1 value of the required angle calculated in advance; when the control structure receives the required a value or L1 value, it sends the value to a prompt structure 2 5.

[0028] By providing an effective control unit 6, the required information can be effectively stored and calculated, and a signal can be sent to the prompt structure according to the required blood flow signal and angle signal.

[0029] In one embodiment, in order to better display the signal, the prompt structure 1 4 receives a blood flow signal within a valid range and then prompts that the closer to the optimal blood flow signal, the higher the signal strength emitted by the prompt structure 1 4. The prompt structure 2 5 receives an a value within a valid range or an L value within a valid range, and the closer to the optimal value, the higher the signal strength emitted by the prompt structure 2 5.

[0030] It should be noted that when using the above-mentioned device, because the length of the finger is not long, the puncture plane can be defaulted to a plane within a small range, or the patient's position can be adjusted so that the skin near the puncture area is basically on the same plane to ensure the accuracy of the monitoring results; in addition, by finding a longitudinal axis that is always in the plane of the skin near the puncture area, the finger can be set along the longitudinal axis, and the angle found at this position is a more accurate angle. In a simple way, you can find an angle that can ensure that the obtained finger tilt angle is a real and effective angle.

[0031] When in use, the finger with the finger sleeve 1, especially the distance sensor 3, needs to be set in the plane where the puncture area is located or on the longitudinal axis of the plane where the skin near the puncture area is located, and then the blood flow signal is searched by the fingertip. When an effective blood flow signal is found, the prompt structure 1 4 sends a prompt signal. After the position is slightly adjusted and the strongest prompt signal is found, the finger is stopped from moving, and the angle of the finger is adjusted by raising or lowering the finger. When the appropriate angle is reached, the lifting structure 2 sends a prompt signal. At this time, the best puncture point and the best puncture angle are found. The finger position is controlled to remain unchanged, and the puncture is performed along the direction of the finger or with reference to the angle of the finger. Puncture in this way enables primary caregivers to quickly find the puncture position and puncture angle, and can provide effective references, reduce the degree of dependence on the experience of caregivers, and effectively avoid doctor-patient conflicts that may be caused by frequent and repeated punctures due to long-term inability to find blood vessels. This device can be used for various punctures, but when the puncture angle is 90°, it is only necessary to use the above-mentioned device to find the effective blood vessel position. This device can also be used for simulation training of daily nursing staff, shortening the actual training time of nursing staff.

[0032] A more preferred embodiment is to classify according to the puncture type, store the classification in the control structure, and select it in the control structure, or set different types of finger sleeves 1 according to different puncture types.

[0033] A more preferred embodiment is to set a vascular blood flow receptor on one side of the fingertip to distinguish arteries and veins by blood flow velocity, with the range of high flow velocity being the artery and the range of low flow velocity being the vein.

[0034] More specifically, the prompt structure 1 4 and the prompt structure 2 5 can be set as follows. The first way is that the prompt structure 1 4 is a display light, in which the blue flashing light flashes when the venous blood flow signal is detected, and the red flashing light flashes when the arterial blood flow signal is detected; the closer to the optimal blood flow signal, the higher the flashing frequency of the light, and the prompt structure 2 5 is also a flashing light, and the closer to the optimal a value, the higher the flashing frequency of the light. This color selection corresponds to the display color of traditional arteriovenous blood vessels, which can reduce the difficulty of distinction.

[0035] One implementation method is that different puncture angles are suitable for different puncture needs; venous blood sampling: 30°, intravenous infusion: 15-30°, intradermal injection 5°; 90 degrees is vertical needle insertion, no need to find an angle, just find the appropriate blood flow and perform puncture directly. For the three angle signals of 5°, 15°, and 30°, the prompt structure 2 5 is set to flashing lights of 3 colors, and there are 3 different L values ​​or a values ​​in the control structure; when the corresponding value is reached, the control structure controls the corresponding color of the prompt structure 2 5 to flash.

[0036] In the second case, the prompt structure 1 4 and the prompt structure 2 5 are combined into a display structure that can display the blood flow velocity and the a value in real time. The display structure displays the blood flow velocity of the artery and the vein respectively, and displays the a value in real time; when a signal related to the blood flow velocity of the artery or vein or the range of the a value is received, the relevant area of ​​the display screen flashes. The operating nursing staff adjusts the angle and position by observing the specific values ​​and the patient's condition.

[0037] A more preferred implementation is that in a specific clinical process, some patients have thick subcutaneous fat tissue, which makes it difficult to find blood vessels, or the blood flow rate of the found blood vessels is very slow. If the puncture is performed according to the puncture angle of conventional patients, the puncture is often not accurate. Therefore, it is necessary to determine the best puncture angle according to the blood flow rate. Generally, the slower the blood flow rate, the larger the puncture angle needs to be selected within the appropriate puncture angle range. The above-mentioned instrument can be used to input the blood flow rate and puncture angle of some difficult clinical patients with successful punctures into the machine learning system, and the corresponding relationship between the blood flow rate and the puncture angle of different difficult patients can be obtained through the neural network of machine learning, and the obtained results are stored in the control structure. In this way, after the blood flow rate corresponds to the puncture angle, the display light flashes to prompt the operator that the operation can be performed.

[0038] In a more preferred embodiment, the finger sleeve 1 is an elastic sleeve that is sleeved on the outside of the medical glove and can be stably sleeved on the finger.

[0039] A more preferred implementation is that, in order to ensure the accuracy of tilt angle monitoring and avoid bending of the finger during operation, an anti-bending structure is provided on the inner or outer side of the finger cuff 1. The anti-bending structure is attached to the finger cuff 1 and will not interfere with the blood flow sensor in finding the blood vessel.

[0040] A more preferred embodiment is to refer to Figure 1-3 The anti-bending structure includes 1-3 anti-bending straight rods 8 arranged along the longitudinal axis of the finger sleeve 1, at least one anti-bending straight rod 8 is arranged on the outer side of the finger sleeve 1 corresponding to the back of the finger, and the anti-bending straight rods 8 also include 2 on both sides. The three anti-bending straight rods 8 are arranged within the range of 1180° semicircle of the finger sleeve.

[0041] A more preferred embodiment is to connect the three anti-bending straight rods 8 together through elastic rings 81 on both sides of the anti-bending straight rods 8, and the angle range of the elastic ring 81 at the first end of the anti-bending straight rod 8 is 180°-240°; the elastic ring 81 at the first end does not cover the area where the fingertips are located. This arrangement can also effectively avoid the interference of the elastic ring 81 on the blood flow monitoring sensor 2.

[0042] A more preferred embodiment is to refer to Figure 1-3Extension plates 9 are arranged on both sides of the middle position of the finger sleeve 1, and the extension plates 9 can be connected with the anti-bending straight rods 8 on both sides; prompt structure 1 4 and prompt structure 2 5 are arranged above the extension plates 9, and the distance sensor 3 is arranged below the extension plates 9. In this way, effective setting positions can be set for each structure. The extension plates 9 are triangular plates, which can improve the stability of the structure.

[0043] A more preferred implementation is that the power supply and control structure can also be set at the extension plate 9, or a wireless transmission module can be set on the blood flow sensor ranging sensor 3 and the prompt structure 1 4 and the prompt structure 2 5, and the control structure is also correspondingly provided with a wireless transmission module, and the transmission between various signals is realized through wireless signals. This arrangement can effectively reduce the structural arrangement of the finger cuff 1 and reduce the weight and complexity of the setting of the finger cuff 1.

[0044] Alternatively, the prompt structure 1 4 and the prompt structure 2 5 may also be provided with indicator lights on the back side of the finger sleeve 1 .

[0045] The specific power supply setting method of the vascular puncture guiding instrument is that the power supply is a solar panel structure, and the setting of the solar panel does not affect the setting of the indicator light.

[0046] The specific distance measuring sensor 3 can be any microstructure sold on the market that meets the requirements of being set on the extension plate 9 . Specifically, the distance measuring sensor 3 is a micro distance measuring sensor 3 , such as a micro laser distance measuring sensor 3 .

[0047] A more preferred embodiment is to refer to Figure 4-5 ; An arc rod 10 is provided in the same plane as the extension plate 9, and the arc center of the arc rod 10 is the center of the blood flow monitoring sensor 2; the arc rod 10 is provided at the second end of the finger sleeve 1, and a movable puncture guide structure 101 is provided on the arc rod 10, and the puncture guide structure 101 includes a micro laser generator 102, and the micro laser generator 102 emits a laser line toward the blood flow monitoring sensor 2. Because the arc rod 10 moves with the finger sleeve 1, the laser line emitted by the micro laser generator 102 thereon can represent the puncture direction. The purpose of this structural setting is that when a suitable puncture angle is found through the finger with the finger sleeve 1, and it is impossible to puncture directly near the finger, an effective laser guide line can be obtained at other required positions through the puncture guide structure 101 moving along the arc rod 10, and accurate puncture guidance can be performed at the required position through the laser guide line.

[0048] The puncture guide structure 101 is provided with a combination hole 103 having the same cross section as the arc rod 10, and the puncture guide structure 101 is combined with the arc rod 10 and moved on the arc rod 10 through the combination hole 103. The arc rod 10 is symmetrically arranged on both sides of the finger sleeve 1, and the overall curvature of the arc rod 10 is in the range of 150-180 degrees. This angle setting can ensure to the greatest extent that a suitable position is found for puncture guidance.

[0049] In a more preferred embodiment, two distance measuring sensors 3 may be arranged on the extension plates 9 on both sides, and the average value obtained by the two distance measuring sensors 3 is L1. This arrangement can further reduce the error.

[0050] In a more preferred embodiment, a small opening 11 is provided at the first end of the finger sleeve 1 , and this arrangement allows the gloves of the caregiver to extend from the small opening 11 , thereby preventing the gloves from interfering with the finger sleeve 1 .

[0051] The technical solutions in the embodiments of the present invention are clearly and completely described above through specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation methods. In the absence of conflict, the above embodiments and features in the embodiments can be combined with each other. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

Claims

1. A blood vessel puncture guide device, characterized in that: It includes The finger sleeve has a first end for the finger pad and a second end for the finger insertion end; The blood flow monitoring sensor is set at the fingertips to monitor blood flow in real time and send out blood flow signals; The distance measuring sensor is arranged at the second end of the finger sleeve; it is used to monitor the distance L1 from the distance measuring sensor to the punctured skin along the direction perpendicular to the connection line between the blood flow monitoring sensor and the distance measuring sensor; The distance between the distance measuring sensor and the blood flow monitoring sensor is L2, which is a consistent fixed distance, or a distance sensing unit is specially set on the distance measuring sensor and the blood flow sensor respectively, and L2 is obtained through the two distance sensing units; L1 and L2 are always perpendicular, and a right triangle with L1 and L2 as right angles is constructed, and the inclination angle of L2 and the puncture plane where the punctured skin is located is a; The angle of a is obtained by the formula tana=L1 / L2; Prompt structure 1, when obtaining a valid blood flow signal, controls it to give a prompt and sends a prompt signal; The prompt structure 2, when obtaining the required a value or the signal of the value of L1 corresponding to a, controls it to prompt and sends a prompt signal; When the prompt structure 1 and the prompt structure 2 send out prompt signals simultaneously, puncture is guided.

2. The device according to claim 1, characterized in that A control unit is also provided to store effective arterial and / or venous blood flow signals, receive blood flow signals from a blood flow sensor in real time, and send effective blood flow signals to prompt structure one after receiving effective arterial or venous blood flow signals. The control structure also receives the real-time value of L1, and can calculate the angle a in real time according to the value of L1, or the control structure stores the L1 value of the required angle calculated in advance; when the control structure receives the required a value or L1 value, it sends the value to prompt structure two.

3. The apparatus according to claim 1, characterized in that After the prompt structure 1 receives a blood flow signal within a valid range, the prompt structure 1 prompts that the closer the blood flow signal is to the optimal blood flow signal, the higher the signal strength emitted by the prompt structure 1; the prompt structure 2 receives an a value within a valid range or an L value within a valid range, and the closer the a value is to the optimal value, the higher the signal strength emitted by the prompt structure 2; Preferably, the puncture types are classified and the classification is stored in the control structure, and can be selected in the control structure, or different types of finger sleeves are set according to different puncture types; Preferably, a vascular blood flow receptor is provided on one side of the fingertip to distinguish arteries from veins by blood flow velocity, the range with high flow velocity is the artery, and the range with low flow velocity is the vein.

4. The device according to claim 3, characterized in that Prompt structure 1 is a display light, in which the blue flashing light flashes when the venous blood flow signal is detected, and the red flashing light flashes when the arterial blood flow signal is detected; the closer to the optimal blood flow signal, the higher the flashing frequency of the light; prompt structure 2 is also a flashing light, and the closer to the optimal a value, the higher the flashing frequency of the light; Preferably, the prompt structure 2 is set to flashing lights of three colors corresponding to the three angle signals of 5°, 15° and 30°, and there are three different L values ​​or a values ​​in the control structure; when the corresponding values ​​are reached, the control structure controls the lights of the corresponding colors of the prompt structure 2 to flash.

5. The apparatus according to claim 3, characterized in that The prompt structure 1 and the prompt structure 2 are combined into a display structure capable of displaying the blood flow velocity and the a value in real time. The display structure displays the blood flow velocity of the artery and the vein respectively, and displays the a value in real time. When a signal related to the blood flow velocity of the artery or vein or the range of the a value is received, the relevant area of ​​the display screen flashes. Preferably, the blood flow velocity and puncture angle of some difficult clinical patients with successful puncture are input into the machine learning system by using the above-mentioned instrument with display structure, and the corresponding relationship between the blood flow velocity and puncture angle of different difficult patients is obtained through the neural network of machine learning, and the obtained results are stored in the control structure, so that after the blood flow velocity corresponds to the puncture angle, the light on the display screen flashes.

6. The apparatus according to claim 1, characterized in that Finger cots are elastic cots that are attached to the outside of medical gloves and can be stably worn on fingers.

7. The apparatus according to claim 6, characterized in that An anti-bending structure is arranged on the inner side or the outer side of the finger sleeve, and the anti-bending structure is fitted on the finger sleeve, and the arrangement position thereof will not interfere with the blood flow sensor in finding the blood vessel; Preferably, the anti-bending structure includes 1-3 anti-bending straight rods arranged along the longitudinal axis of the finger sleeve, at least one anti-bending straight rod is arranged on the outside of the finger sleeve corresponding to the back of the finger, and the anti-bending straight rods also include 2 on both sides. The three anti-bending straight rods are arranged within the range of 180° semicircle of the finger sleeve.

8. The device according to claim 7, characterized in that The three anti-bending straight rods are connected together by elastic rings on both sides of the anti-bending straight rods, and the angle range of the elastic ring at the first end of the anti-bending straight rod is 180°-240°; the elastic ring at the first end does not cover the area where the fingertips are located.

9. The apparatus according to claim 8, characterized in that Extension plates are arranged on both sides of the middle position of both sides of the finger sleeve, and the extension plates are integrally connected with the anti-bending straight rods on both sides; prompt structure 1 and prompt structure 2 are arranged above the extension plates, and a distance measuring sensor is arranged below the extension plates; Preferably, the power supply and control structure can also be arranged at the extension plate position, or a wireless transmission module can be arranged on the blood flow sensor distance sensor and the prompt structure 1 and the prompt structure 2, and the control structure can also be provided with a wireless transmission module accordingly, so as to realize the transmission between various signals through wireless signals; Alternatively, the indicator lights of the prompt structure 1 and the prompt structure 2 may be arranged on the back side of the finger sleeve; Preferably, the power source is a solar panel structure, and the setting of the solar panel does not affect the setting of the indicator light; Preferably, the distance measuring sensor is a micro distance measuring sensor, such as a micro laser distance measuring sensor; Preferably, two distance measuring sensors may be arranged on the extension plates at both sides, and the average value obtained by the two distance measuring sensors is L1.

10. The apparatus according to claim 9, characterized in that An arc rod is provided in the same plane as the extension plate, and the arc center of the arc rod is the center of the blood flow monitoring sensor; the arc rod is provided at the second end of the finger sleeve, and a movable puncture guide structure is provided on the arc rod, and the puncture guide structure includes a micro laser generator, and the micro laser generator emits a laser line toward the blood flow monitoring sensor; Preferably, a combination hole is provided on the puncture guide structure, which is consistent with the cross section of the arc-shaped rod, and the puncture guide structure is combined with the arc-shaped rod and the puncture guide structure is moved on the arc-shaped rod through the combination hole; Preferably, the arc-shaped rods are symmetrically arranged on both sides of the finger sleeve, and the overall curvature of the arc-shaped rods ranges from 150 to 180 degrees.

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