A vascular fluoroscopic system

Abstract

Vascular fluoroscopy can provide medical staff with a larger acupuncture field of view. However, due to the large number of human blood vessels and their wide distribution, it is difficult to obtain the optimal blood vessel to be injected through manual observation. The present invention relates to a vascular fluoroscopy system. The system comprises a blood vessel lighting unit, a dispatching center, a human body detection unit and an injection detection unit. Through the cooperation between the blood vessel lighting unit, the dispatching center, the human body detection unit and the injection detection unit, the system can obtain the optimal blood vessel in the specified injection area and the corresponding projection image of the blood vessel based on the collected information analysis. Medical staff can increase the efficiency of their injection based on the optimal image recommended by the system.

Description

Technical Field

[0001] The present invention relates to the field of sensor technology, and in particular to a blood vessel fluoroscopy system. Background Art

[0002] When it comes to getting an IV or having blood drawn, many people are afraid of needles. In fact, some people often need two or even more injections to be successful because their veins are too thin or too low. Even for professional medical personnel, intravenous injection is a challenging process. Improper operation may cause phlebitis, vascular blockage or other complications.

[0003] There are many ways to assist injection. The most widely used method is for medical staff to dilate the patient's blood vessels through patting, and then find the point where the needle can be inserted based on the dilated blood vessels.

[0004] The Chinese patent with the patent publication number CN112927199B discloses a method for selecting an injection point for non-intravenous injection therapy, comprising: S1, using a near-infrared imaging device to image the user's injection site to obtain a near-infrared vein image ORIGINAL of the injection site; S2, performing pre-processing such as cropping and scaling on the near-infrared vein image ORIGINAL obtained in S1 to obtain a grayscale image GRAY; S3, performing grayscale normalization processing on the grayscale image GRAY obtained in S2 to obtain a normalized grayscale image NORM; S4, performing pre-processing such as cropping and scaling on the near-infrared vein image ORIGINAL obtained in S3 to obtain a grayscale image GRAY; S5, performing grayscale normalization processing on the grayscale image GRAY obtained in S2 to obtain a normalized grayscale image NORM; S6, performing pre-processing such as cropping and scaling on the near-infrared vein image ORIGINAL obtained in S3 to obtain a grayscale image GRAY; S7, performing pre-processing such as cropping and scaling on the near-infrared vein image ORIGINAL obtained in S3 to obtain a grayscale image GRAY; S8, performing pre-processing such as cropping and scaling on the near-infrared vein image ORIGINAL obtained in S1 to obtain a grayscale image GRAY; S9, performing pre-processing such as cropping and scaling on the near-infrared vein image ORIGINAL obtained in S1 to obtain a grayscale image GRAY; S10, performing pre-processing such as cropping and scaling on the near-infrared vein image ORIGINAL obtained in S1 to obtain a grayscale image GRAY; S11, performing pre-processing such as cropping and scaling on the near-infrared vein image ORIGINAL obtained in S1 to obtain a grayscale image GRAY; S12, performing pre-processing such as cropping and scaling on the near-infrared vein image ORIGINAL obtained in S1 to obtain a grayscale image The normalized grayscale image NORM is binarized to obtain a near-infrared binary image BINARY; S5, the near-infrared binary image BINARY obtained in S4 is filtered to obtain a vascular binary image VESSEL; S6, candidate pixel points are collected from the vascular binary image VESSEL obtained in S5, the range square size of each candidate pixel point is calculated and compared, and the pixel point position corresponding to one or more specific positions that are most suitable as the injection point is obtained. The system performs pixel processing based on vascular perspective in order to obtain a clearer field of view for finding blood vessels.

[0005] In the prior art, the vascular fluoroscopy technology is mature, so that when patients are injecting liquid medicine, they can provide medical staff with a larger and clearer vascular image through the vascular fluoroscopy. However, in the actual injection process, the vascular image presented by the high-quality field of view contains more injectable blood vessels, which gives medical staff more choices, but also increases the difficulty for medical staff to judge the quality of blood vessels based on vascular images. Based on this, the present invention relates to a vascular fluoroscopy system, which constructs a mirror image 3D virtual blood vessel identical to the blood vessel by monitoring different dimensions of the blood vessel, thereby providing medical assistance to medical staff.

[0006] In addition, on the one hand, there are differences in understanding among those skilled in the art; on the other hand, the applicant studied a large number of documents and patents when making the present invention, but due to space limitations, not all details and contents are listed in detail. However, this does not mean that the present invention does not have the characteristics of these prior arts. On the contrary, the present invention already has all the characteristics of the prior art, and the applicant reserves the right to add relevant prior art to the background technology. Summary of the invention

[0007] Infusion or injection has become a commonly used medical method in clinical medicine. However, infusion or injection requires medical staff to learn and practice for a long time, and accumulate a lot of experience to achieve the probability of successful direct intravenous injection. The biggest reason for intravenous injection errors is that it is difficult for medical staff to find the location of the human body's venous blood vessels close to the epidermis through the epidermis, especially for people with vascular atrophy or small blood vessels. In the prior art, medical staff often use patting to promote venous dilation to increase the clarity of the veins in the field of vision. On the one hand, for obese people and people with small blood vessels, the increase in venous clarity under this method is relatively small. Due to the thickness of the epidermis or the small blood vessels, it is still difficult for medical staff to accurately find the location of injectable blood vessels; on the other hand, for people with vascular atrophy or frequent injections, patting and artificial suppression of the flow path diameter of the flow front end of the injectable blood vessels (for example, tightening the arm with a rubber tube) will damage their fragile blood vessels. Even if medical staff gently implement this method, it may still cause patients to have capillary ruptures and generate bleeding points.

[0008] With the advancement of technology, venous lighting devices have emerged. The venous lighting device is a venous observation lighting tool developed using advanced LED light source technology. When the patient's epidermis is illuminated, the corresponding blood vessels will be projected at the irradiated position, allowing medical staff to directly see the blood vessels under the patient's epidermis. However, in actual operation, the injection position for different populations needs to be selected based on the experience of medical staff. At the same time, the selection of injection blood vessels also requires medical staff to select based on the blood vessel flow rate state. The angle at which the needle enters the patient's blood vessel also determines whether the injection process is smooth and whether the patient is comfortable during the infusion process. During this process, medical staff will assume the insertion process to confirm after suspending the injection needle, and often change the position after observing the patient's extremities. At this time, medical staff need to manually adjust the venous lighting device, holding the injection needle in one hand, and adjusting the lighting device with the other hand to track the position of the injection needle. This process may cause the needle held by the medical staff to be contaminated. When choosing an upper limb vein for injection, the radial vein has a better injection effect, but when changing positions, the branches around the radial vein are confusing, making it more difficult for medical staff to find the radial vein, which reduces the efficiency of the injection process. At the same time, because there are thousands of blood vessels in the human body, when performing vascular fluoroscopy, medical staff need to select the injection vessel in the fluoroscopic image in a very short time. This selection is highly random and cannot truly play the role of efficient injection under vascular fluoroscopy, that is, to select the best quality blood vessel for injection.

[0009] In view of the problems caused by the prior art, the present invention provides a vascular fluoroscopy system, which at least includes a vascular lighting unit, a dispatch center, a human body detection unit and an injection detection unit. The human body detection unit can provide a first focal area for the vascular lighting unit to initially track, and the injection detection unit tracks the injection in the form of image data, wherein the dispatch center triggers the vascular lighting unit to turn on based on the information of the human body contour provided by the human body detection unit to confirm that the vascular lighting unit enters the first focal area, and in response to the opening of the vascular lighting unit, the injection detection unit tracks the injection in the first focal area and sends the position information related to the position of the injection to the dispatch center, and the dispatch center controls the vascular lighting unit to move to the area where the injection is located. The system involved in the present invention can perform secondary positioning, and through the division of the patient's extremity area and the further division of the vascular flow direction based on the extremity area, the system can accurately move to the location of the injection needle and promptly find out whether there is an error in the injection process. When there is a problem with the injection angle during the injection process, there may be a problem that the injection needle enters the blood vessel but then passes through the blood vessel, causing the liquid to be injected into the area outside the blood vessel, or there may be a problem that the injection needle does not enter the blood vessel at the beginning. Regardless of which of the above injection problems occur, the dispatch center can determine whether the injection needle has left the blood vessel area through the injection detection unit's position detection of the injection needle and the blood vessel position distribution provided by the blood vessel illumination unit.

[0010] The injection process is divided into three stages, including the first injection stage, the second injection stage and the third injection stage. When in the first injection stage, the injection needle has not yet entered the human body, and the medical staff holds the injection needle to find an injectable position and an injectable angle. When in the second injection stage, the medical staff holds the injection needle and allows the injection needle to enter the human body. When in the third injection stage, it is divided into three situations based on the three medical methods of injection, infusion and puncture. The third injection stage of the injection is that the medical staff pushes the needle by hand and pulls out the needle after the liquid is injected into the body. The third injection stage of the infusion is that after the medical staff fixes the position of the needle, the patient waits alone for the infusion process to end. The third injection stage of the puncture includes the drainage of the collected sample, that is, the stagnation of the puncture needle and the withdrawal of the puncture needle.

[0011] Specifically, the human body detection unit confirms the tissue site of the human body for injection, that is, the first focus area is the back of the hand, the upper arm or the front chest. When the system tracks the tissue site within the field of view, it clarifies the detection range of the injection detection unit. When the injection exceeds the first focus area, the injection detection unit no longer tracks the injection. Through this method, a reference is provided for the injection area. When the first focus area is the back of the hand, the dispatch center can confirm whether the patient has been injected on the back of the hand in the short term based on the patient history database. When the back of the hand has not been punctured by a needle, the dispatch center selects a blood vessel with a good state based on the back of the hand blood vessel distribution image provided by the blood vessel lighting unit, and controls the blood vessel lighting unit to move to the blood vessel position, and displays the perspective image of the blood vessel at the back of the patient's hand, thereby reducing the blood vessel search time of medical staff. When the blood vessel is abandoned, the blood vessel is abandoned, which means that the medical staff holds the needle and moves it from the blood vessel to other positions due to other factors (difficult angle adjustment, etc.). The conditions for the dispatch center to judge that the blood vessel is in a good state include: the thickness of the blood vessel and the location of the blood vessel. When the dispatch center screens blood vessels, blood vessels with large diameters and located in areas that are convenient for injection are optimal.

[0012] According to a preferred embodiment, the injection detection unit can monitor the position of the injection needle in real time based on visual scanning to enable the system to track and locate the injection needle. The center point of the injection detection unit can be perpendicular to one end of the injection needle, so that the system can follow the movement of the injection needle when the injection needle moves. The system can be assembled in a container, with the lighting unit as the center, facing the patient's injection site. The mobile structure of this system can be the same as the structure of the VeinSight mobile vascular imager.

[0013] According to a preferred embodiment, the method for recommending the optimal blood vessel is to divide the injection angle priority and the blood vessel diameter priority based on the region, and calculate the ranking of the blood vessel in the first focal region. The blood vessel ranking score is calculated as follows:

[0014] F=a×S+b×Z

[0015] F is the vascular evaluation score, a is the weight of the vascular position in the vascular evaluation, b is the weight of the vascular diameter parameter in the vascular evaluation, S is the grade of the vascular position, and Z is the vascular diameter parameter.

[0016] The first focus area is divided into at least two partitions, the first partition is the middle, and the second partition is the two sides, such as Figure 2 As shown, the first zone has a higher grade than the second zone, and its S value is higher than the second zone. Since the edge position is more difficult to acupuncture than the central area, and the edge area is easily compressed by the patient's hand rotation, the blood vessel selectivity of the second zone is worse than that of the first zone.

[0017] Since the blood vessels in the first focal area are connected, each blood vessel is distinguished by the node where it bifurcates or merges as the endpoint of the blood vessel. The weights of a and b can be adjusted autonomously by medical staff. When targeting obese patients, since their epidermal thickness is higher than that of ordinary patients, the injection position has a greater impact on the injection process than the blood vessel diameter. For example, when the epidermal thickness is higher, the needle puncture distance is longer. When injecting at the edge, medical staff need to adjust the needle puncture tilt angle, and the injection difficulty is higher. The weight value of a is greater than the weight value of b.

[0018] Through calculations using the above formula, the blood vessels in the first focal area are arranged from large to small according to the size of the F value, and are recommended to medical staff in order from large to small.

[0019] According to a preferred embodiment, the recommended method is that medical staff can adjust the working mode of the dispatch center through the external control components of the system (such as buttons, touch screens, etc.). The dispatch center includes at least a first mode and a second mode.

[0020] According to a preferred embodiment, the first mode is a recommendation mode, that is, the system obtains the preferred blood vessel arrangement in the first focal area based on the above formula and recommends it to the medical staff. The recommended method is: the blood vessel lighting unit moves sequentially to collect all blood vessel information in the first focal area, including the position and blood vessel diameter. The dispatch center segments the blood vessels based on the collected blood vessel information with the fulcrums of the blood vessel bifurcation or confluence as the two ends of the blood vessel. Based on the above formula, the segmented blood vessels are ranked. The dispatch center controls the blood vessel lighting unit to move to the position of the first-ranked blood vessel, and only generates a projection image of the blood vessel on the skin epidermis. When the medical staff abandons the blood vessel based on their own judgment, the dispatch center controls the blood vessel lighting unit to move to the position of the second-ranked blood vessel in response to the change in the position information of the injection needle provided by the injection detection unit, and still only provides the projection image of the blood vessel at this position.

[0021] According to a preferred embodiment, the second mode is a tracking mode. The dispatch center is used to trigger and control the movement of the blood vessel lighting unit. When the injection enters the first focal area, the dispatch center triggers the injection detection unit. The injection detection unit tracks the injection at all times within the first focal area, and sends the position of the injection to the dispatch center in the form of a coordinate system. The dispatch center controls the blood vessel lighting unit to move to the coordinate position so that the projection area of ​​the blood vessel lighting unit coincides with the injection. By tracking the injection in real time, the device can intelligently provide medical staff with the vascular conditions of the patient's injection area that they want to know.

[0022] According to a preferred embodiment, the human body detection unit includes a thermal imaging unit and a visual acquisition unit, wherein the dispatch center overlaps the image captured by the visual acquisition unit and the image captured by the thermal imaging unit to confirm the first focal area where the injection needle can be injected.

[0023] According to a preferred embodiment, the injection detection unit monitors the injection within the tracking frame generated by the first focal area, and generates the coordinate information of the position when the injection stays at its location for more than α, and sends it to the dispatch center. The injection detection unit can perform initial information acquisition, that is, the image of the injection that enters the field of view of the injection detection unit for the first time can be captured, and then the injection detection unit can track the injection according to the acquisition of the initial image in the first focal area. In order to reduce the amount of data processing of the dispatch center and make the control of the vascular lighting unit by the dispatch center smoother, when the injection stays at a position in the first focal area for more than α, the dispatch center controls the injection detection unit to move to the position of the injection based on the medical staff's willingness to find the blood vessel at this position, and provides the medical staff with the blood vessel perspective image at this position. By judging the time, it is avoided that the position change during the movement causes the dispatch center to frequently send the moving position information to the blood vessel lighting unit. Preferably, the range of α is 1~10s.

[0024] According to a preferred embodiment, the dispatching center can construct a 2D image of the blood vessel based on the relevant information about the position distribution and diameter of the blood vessel provided by the blood vessel lighting unit, and control the blood vessel lighting unit to project the 2D image onto the information collection area of ​​the human body area, so that the projected blood vessel can correspond to the actual blood vessel position.

[0025] According to a preferred embodiment, when the overlap time between the blood vessel illumination unit and the injection needle exceeds β, the dispatch center determines that the current stage is the second injection stage. In response to the warning requirement of the second injection stage, the dispatch center generates an injection failure alarm based on the injection needle provided by the needle detection unit entering the blood vessel area outside the blood vessel perspective view provided by the blood vessel illumination unit. Preferably, the range of β is 30s~5min to cover the monitoring of the injection, puncture and infusion process.

[0026] According to a preferred embodiment, when the injection needle remains in the blood vessel area provided by the blood vessel illumination unit for more than γ, the dispatch center determines that the patient is in the third injection stage, and the dispatch center controls the injection detection unit to collect images of the injection needle and the blood vessel where the injection needle is located, and generates an alarm of abnormal infusion when the injection needle leaves the blood vessel area. Preferably, γ can be greater than 5 minutes.

[0027] According to a preferred embodiment, in response to the dispatch center determining that the current process enters the second injection stage, the human body detection unit enters a dormant state. The dispatch center can switch the contrast and color of the vascular area and the extravascular area projected by the vascular illumination unit based on observation requirements, so that the operator can distinguish the vascular area from the extravascular area.

[0028] According to a preferred embodiment, the vascular illumination unit uses an LED light source with a wavelength of 620nm to 760nm. The vascular fluoroscopy collects near-infrared light based on the difference in the absorption of near-infrared light by deoxyhemoglobin in the veins, and finally displays the veins clearly on the screen after photoelectric conversion and image processing of the absorbed light energy. In addition to being able to see the surrounding venous branches, the vascular illumination unit can even see the valves and blood flow of the patient's blood vessels 15 mm below the skin. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a 3D physical demonstration diagram of the present invention;

[0030] Figure 2 4 is an example diagram of the partitioning of the first focus area of ​​the present invention.

[0031] Description of Reference Numerals

[0032] 100: first partition; 200: second partition. DETAILED DESCRIPTION

[0033] The following is a detailed description with reference to the accompanying drawings.

[0034] The vascular fluoroscopy device in the prior art only has the fluoroscopy function, and when in use, medical staff are required to select the scanning area and the blood vessel to be injected. When the blood vessels are visible, due to the large number of blood vessels in the human body, doctors can only choose based on experience and may not necessarily screen out the most suitable blood vessels for injection, and cannot give full play to the optimal function of the vascular fluoroscopy device. This system sets an intelligent first mode and a tracking second mode based on the needs of medical staff. In the first mode, medical staff can obtain the most suitable injection blood vessels through objective data analysis. In the second mode, medical staff can obtain the vascular fluoroscopy images of the area they need to observe in a timely manner through the tracking and positioning of the system. Example 1

[0035] The detection system involved in the present invention is suitable for infusion monitoring.

[0036] Specifically, the present invention provides a vascular fluoroscopy system. The system at least includes a vascular lighting unit, a dispatch center, a human body detection unit, and an injection detection unit. The human body detection unit can provide a first focal area for the vascular lighting unit to initially track, and the injection detection unit tracks the injection in the form of image data, wherein the dispatch center triggers the vascular lighting unit to turn on based on the information of the organ contour provided by the human body detection unit to confirm that the vascular lighting unit enters the first focal area, and in response to the turning on of the vascular lighting unit, the injection detection unit tracks the injection in the first focal area and sends the position information related to the position of the injection to the dispatch center, and the dispatch center controls the vascular lighting unit to move to the area where the injection is located.

[0037] Specifically, the medical staff turns on the system, and the dispatch center and the human body detection unit are turned on first. The patient places his hand with the back of the hand facing the human body detection unit within the detection range of the human body detection unit. The human body detection unit sends the image to the dispatch center through visual scanning. The dispatch center confirms that the first focus area is the back of the hand.

[0038] In response to the confirmation of the first focus area, the injection detection unit and the blood vessel lighting unit are turned on. When the infusion needle enters the first focus area, the injection detection unit captures an image of the infusion needle based on the initial injection needle, and sends the image information to the dispatch center. The dispatch center confirms the tracking target. When the infusion needle exceeds the first focus area, the injection detection unit no longer tracks the infusion needle. Through this method, a reference is provided for the injection area.

[0039] When the first focus area is the back of the hand, the dispatch center can confirm whether the patient will be injected on the back of the hand in the short term based on the patient history database. When the back of the hand has not been punctured, the dispatch center selects a blood vessel in good condition based on the blood vessel distribution image of the back of the hand provided by the blood vessel lighting unit, and controls the blood vessel lighting unit to move to the blood vessel position, and displays the perspective image of the blood vessel at the back of the patient's hand, thereby reducing the time for medical staff to find the blood vessel. When the blood vessel is abandoned, the blood vessel is abandoned when the medical staff holds the needle and moves it from the blood vessel to other locations due to other factors (difficult angle adjustment, etc.). The conditions for the dispatch center to judge whether the blood vessel is in good condition include: the thickness of the blood vessel and the location of the blood vessel. When the dispatch center screens blood vessels, blood vessels with large diameters and located in areas that are convenient for injection are optimal.

[0040] The method for recommending the optimal blood vessel is to divide the injection angle priority and the blood vessel diameter priority based on the region, and calculate the ranking of the blood vessel in the first focal region. The ranking score of the blood vessel is calculated as follows:

[0041] F=a×S+b×Z

[0042] F is the vascular evaluation score, a is the weight of the vascular position in the vascular evaluation, b is the weight of the vascular diameter parameter in the vascular evaluation, S is the grade of the vascular position, and Z is the vascular diameter parameter.

[0043] For example, if the patient suffers from vascular atrophy, a is 40% and b is 60%. The back of the hand is divided into a first partition 100 and a second partition 200. The S value of the first partition 100 is 10, and the S value of the second partition 200 is 5. At this time, the system measures the blood vessels in the image provided by the vascular lighting unit. The diameter of the first blood vessel distributed in the first partition 100 is 5 mm, and the diameter parameter of the second blood vessel distributed in the second partition 200 is 3 mm. According to the above formula, the judgment score F1 of the first blood vessel is 7, and the judgment score F2 of the second blood vessel is 3.8. Since the F value of the first blood vessel is higher than that of the second blood vessel, the recommendation priority of the first blood vessel is higher than that of the second blood vessel.

[0044] Since the blood vessels in the first focal area are connected, each blood vessel is distinguished by the node where it bifurcates or merges as the endpoint of the blood vessel. The weights of a and b can be adjusted autonomously by medical staff. When targeting obese patients, since their epidermal thickness is higher than that of ordinary patients, the injection position has a greater impact on the injection process than the blood vessel diameter. For example, when the epidermal thickness is higher, the needle puncture distance is longer. When injecting at the edge, medical staff need to adjust the needle puncture tilt angle, and the injection difficulty is higher. The weight value of a is greater than the weight value of b.

[0045] Through calculations using the above formula, the blood vessels in the first focal area are arranged from large to small according to the size of the F value, and are recommended to medical staff in order from large to small.

[0046] According to a preferred embodiment, the recommended method is that medical staff can adjust the working mode of the dispatch center through the external control components of the system (such as buttons, touch screens, etc.). The dispatch center includes at least a first mode and a second mode.

[0047] When the medical staff selects the first mode, the system obtains the preferred blood vessel arrangement in the first focal area based on the above formula and recommends the first blood vessel to the medical staff. The blood vessel illumination unit moves to the location of the first blood vessel and projects the image of the first blood vessel at the location. When the medical staff abandons the first blood vessel based on their own judgment, the dispatch center controls the blood vessel illumination unit to move to the location of the second blood vessel in response to the change in the position information of the injection needle provided by the needle detection unit, and only provides the projection image of the blood vessel at this location.

[0048] When the medical staff selects the second mode, the dispatch center is used to trigger and control the movement of the blood vessel lighting unit. When the injection needle enters the first focal area, the dispatch center triggers the injection detection unit. The injection detection unit tracks the injection needle at all times within the first focal area, and sends the position of the injection needle to the dispatch center in the form of a coordinate system. The dispatch center controls the blood vessel lighting unit to move to the coordinate position so that the projection area of ​​the blood vessel lighting unit coincides with the injection needle. By tracking the injection needle in real time, the device can intelligently provide the medical staff with the vascular conditions of the patient's injection area that they want to know. According to a preferred embodiment, the injection detection unit monitors the injection needle within the tracking frame generated by the first focal area, and generates the coordinate information of the position when the injection needle stays at its location for more than 3 seconds, and sends it to the dispatch center.

[0049] According to a preferred embodiment, the dispatch center can construct a 2D image of the blood vessel based on the information related to the position distribution and diameter of the blood vessel provided by the blood vessel illumination unit, and control the blood vessel illumination unit to project the 2D image on the information collection area of ​​the human body area so that the projected blood vessel can correspond to the actual blood vessel position. By projecting the 2D image on the epidermal position corresponding to the blood vessel, operation guidance is provided to medical staff.

[0050] According to a preferred embodiment, when the overlap time between the blood vessel illumination unit and the infusion needle exceeds 1 minute, the dispatch center determines that the current stage is the second injection stage. In response to the warning requirement of the second injection stage, the dispatch center generates an injection failure alarm based on the infusion needle provided by the injection detection unit entering outside the blood vessel area in the blood vessel perspective view provided by the blood vessel illumination unit. The alarm can exist in the form of an image or sound. The alarm can also be: the change of the blood vessel illumination lamp from on to sleep.

[0051] According to a preferred embodiment, when the infusion needle remains in the first blood vessel area provided by the blood vessel lighting unit for more than 15 minutes, the dispatch center determines that the patient is in the third injection stage. The dispatch center controls the injection detection unit to collect images of the infusion needle and the blood vessel where the infusion needle is located, and generates an alarm for abnormal infusion when the infusion needle leaves the area of ​​the blood vessel. When the medical staff leaves, the patient waits alone for the end of the infusion. When the patient turns over or moves the back of the hand for the injection, the infusion needle may accidentally fall off or poke out of the blood vessel, resulting in infusion failure. The system in the third injection stage can automatically switch to the second mode. It can follow the patient's movement when the patient moves slightly to avoid false alarms.

[0052] According to a preferred embodiment, in response to the dispatch center determining that the current process enters the second injection stage, the human body detection unit enters a dormant state. The second injection stage is the stage where the medical staff inserts the infusion needle into the patient's blood vessel. In order to avoid redundancy of data screened by the dispatch center, the human body detection unit no longer sends detection data to the dispatch center.

[0053] According to a preferred embodiment, the dispatch center can switch the contrast and color of the vascular area and the extravascular area projected by the vascular lighting unit based on observation needs, so that the operator can distinguish the vascular area from the extravascular area. Preferably, the vascular color can be transparent and the extravascular color can be red or green, and the color of the vascular is the color of the patient's epidermal skin. Through the color contrast between the inside and outside of the blood vessel, medical staff can clearly observe the direction of the blood vessel and distinguish whether the needle has entered the correct position when the needle enters the blood vessel. Example 2

[0054] The detection system involved in the present invention is suitable for puncture. Puncture can be used for venous blood sampling.

[0055] Specifically, the present invention provides a vascular fluoroscopy system. The system at least includes a vascular lighting unit, a dispatch center, a human body detection unit, and an injection detection unit. The human body detection unit can provide a first focal area for the vascular lighting unit to initially track, and the injection detection unit tracks the blood collection needle in the form of image data, wherein the dispatch center triggers the vascular lighting unit to turn on based on the information of the organ contour provided by the human body detection unit to confirm that the vascular lighting unit enters the first focal area, and in response to the turning on of the vascular lighting unit, the injection detection unit tracks the blood collection needle in the first focal area and sends the position information related to the position of the blood collection needle to the dispatch center, and the dispatch center controls the vascular lighting unit to move to the area where the blood collection needle is located.

[0056] Specifically, the medical staff turns on the system, and the dispatch center and the human body detection unit are turned on first. The patient places his arm with the palm facing the human body detection unit within the detection range of the human body detection unit. The human body detection unit sends the image to the dispatch center through visual scanning. The dispatch center confirms that the first focus area is the arm.

[0057] In response to the confirmation of the first focus area, the injection detection unit and the blood vessel lighting unit are turned on. When the blood collection needle enters the first focus area, the injection detection unit collects an image of the blood collection needle based on the blood collection needle that initially appears, and sends the image information to the dispatch center. The dispatch center confirms the tracking target. When the blood collection needle exceeds the first focus area, the injection detection unit no longer tracks the blood collection needle. Through this method, a reference is provided for the injection area, and the problem of false alarms is avoided.

[0058] When the first focus area is the arm, the dispatch center can confirm whether the patient has been injected in the arm in the short term, as well as the injection area of ​​the arm based on the patient history database. The dispatch center can exclude the blood vessels located in this area when arranging the blood vessel positions to avoid repeated acupuncture of the blood vessels in this area and the formation of scars. Specifically, the area of ​​the arm that has been acupunctured within 3 days can be included in the history database. The dispatch center selects blood vessels in good condition based on the arm blood vessel distribution image provided by the blood vessel lighting unit, and controls the blood vessel lighting unit to move to the blood vessel position, and displays the perspective image of the blood vessel at the patient's arm position, thereby reducing the time for medical staff to find blood vessels. When the blood vessel is abandoned, the blood vessel is abandoned when the medical staff holds the needle and moves it from the blood vessel to other locations due to other factors (difficult angle adjustment, etc.).

[0059] The method for recommending the optimal blood vessel is to divide the injection angle priority and the blood vessel diameter priority based on the region, and calculate the ranking of the blood vessel in the first focus area. The ranking score of the blood vessel is calculated as follows:

[0060] F=a×S+b×Z

[0061] F is the vascular evaluation score, a is the weight of the vascular position in the vascular evaluation, b is the weight of the vascular diameter parameter in the vascular evaluation, S is the grade of the vascular position, and Z is the vascular diameter parameter.

[0062] For example, if the patient is obese, a is 60% and b is 40%. The arm area is divided into a first partition 100 and a second partition 200. The S value of the first partition 100 is 5, and the S value of the second partition 200 is 10. At this time, the system measures the blood vessels in the image provided by the blood vessel illumination unit. The diameter of the first blood vessel distributed in the first partition 100 is 3 mm, and the diameter parameter of the second blood vessel distributed in the second partition 200 is 5 mm. According to the above formula, the judgment score F1 of the first blood vessel is 4.2, and the judgment score F2 of the second blood vessel is 8. Since the F value of the second blood vessel is higher than that of the first blood vessel, the recommendation priority of the second blood vessel is higher than that of the first blood vessel.

[0063] Through calculations using the above formula, the blood vessels in the first focal area are arranged from large to small according to the size of the F value, and are recommended to medical staff in order from large to small.

[0064] According to a preferred embodiment, when the overlap time between the blood vessel lighting unit and the blood collection needle exceeds 30 seconds, the dispatch center determines that the current stage is the second injection stage. In response to the early warning requirement of the second injection stage, the dispatch center generates an injection failure alarm based on the fact that the blood collection needle provided by the injection detection unit enters outside the blood vessel area in the blood vessel perspective view provided by the blood vessel lighting unit. The alarm can exist in the form of an image or sound. The alarm can also be the change process of the blood vessel lighting lamp from turning on to sleeping. The alarm is used to prevent the mixing of non-target samples that occurs during venipuncture, that is, the mixing of tissue fluid into the blood sample.

[0065] It should be noted that the above-mentioned specific embodiments are exemplary, and those skilled in the art can come up with various solutions inspired by the disclosure of the present invention, and these solutions also belong to the disclosure scope of the present invention and fall within the protection scope of the present invention. Those skilled in the art should understand that the present invention specification and its drawings are illustrative and do not constitute a limitation on the claims. The scope of protection of the present invention is defined by the claims and their equivalents. The present invention specification contains multiple inventive concepts, such as "preferably", "according to a preferred embodiment" or "optionally", all of which indicate that the corresponding paragraph discloses an independent concept, and the applicant reserves the right to file a divisional application based on each inventive concept.

Claims

1. A vascular fluoroscopy system, It is characterized in that The system at least comprises a blood vessel illumination unit, a dispatch center, a human body detection unit and an injection detection unit, wherein the human body detection unit can provide a first focal area for initial tracking of the blood vessel illumination unit, and the injection detection unit tracks the injection in the form of image data, wherein: The dispatch center confirms that the blood vessel lighting unit enters the first focus area based on the human body contour information provided by the human body detection unit and triggers the blood vessel lighting unit to turn on. In response to the turning on of the blood vessel lighting unit, the injection detection unit tracks the injection in the first focus area and sends the position information related to the position of the injection to the dispatch center. The dispatch center controls the blood vessel lighting unit to move to the area where the injection is located. The injection detection unit monitors the injection within the tracking frame generated by the first focus area, and generates coordinate information of the position when the injection stays at the position for more than α, and sends it to the dispatch center. When the overlap time between the blood vessel illumination unit and the injection needle exceeds β, the dispatch center determines that the current stage is the second injection stage. In response to the warning requirement of the second injection stage, the dispatch center generates an injection failure alarm based on the fact that the injection needle provided by the needle detection unit enters outside the blood vessel area in the blood vessel perspective view provided by the blood vessel illumination unit. When the injection needle remains in the blood vessel area provided by the blood vessel lighting unit for more than γ time, the dispatch center determines that the patient is currently in the third injection stage - infusion, and the dispatch center controls the injection detection unit to collect images of the injection needle and the blood vessel where the injection needle is located, and generates an infusion abnormality alarm when the injection needle leaves the blood vessel area.

2. The vascular fluoroscopy system according to claim 1, It is characterized in that The human body detection unit includes a thermal imaging unit and a visual acquisition unit, wherein the dispatch center overlaps the image captured by the visual acquisition unit and the image captured by the thermal imaging unit to confirm a first focal area where the injection needle can be injected.

3. The vascular fluoroscopy system according to claim 1, It is characterized in that The dispatch center can construct a 2D image of the blood vessel based on the relevant information about the position distribution and diameter of the blood vessel provided by the blood vessel lighting unit, and control the blood vessel lighting unit to project the 2D image onto the information collection area of ​​the human body area so that the projected blood vessel can correspond to the actual blood vessel position.

4. The vascular fluoroscopy system according to claim 3, It is characterized in that The vascular fluoroscopy system includes a first mode for recommending injection vessels to medical personnel, wherein the dispatch center generates priorities of the vessels within the first focus area based on information related to the positions of the vessels and the diameters of the vessels provided by the vessel illumination unit.

5. The vascular fluoroscopy system according to claim 1, It is characterized in that In response to the dispatch center determining that the current process enters the second injection stage, the human body detection unit enters a dormant state.

6. The vascular fluoroscopy system according to claim 1, It is characterized in that The dispatch center can switch the contrast and color of the vascular area and the extravascular area projected by the vascular illumination unit based on observation requirements, so that the operator can distinguish the vascular area from the extravascular area.

7. The vascular fluoroscopy system according to claim 1, It is characterized in that The blood vessel lighting unit adopts an LED light source with a wavelength of 620nm to 760nm.

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