Radial artery compressor control method and related devices

Abstract

The application provides a radial artery compressor control method and related equipment, which can be used in the field of image processing technology; the method comprises the following steps: acquiring a first laser blood image of a hand region of a target object collected by an image acquisition component; determining a target speckle contrast according to the pixel intensity of a pixel point in the first laser blood image, and determining the current blood flow rate of the hand region according to the target speckle contrast; in the case that the current blood flow rate indicates that the radial artery has an occlusion risk, controlling the ulnar artery balloon to deflate, and determining a target pressure according to the highest pressure pulse wave amplitude of the target object in the deflation process of the ulnar artery balloon; controlling the ulnar artery balloon to inflate until the pressure applied by the ulnar artery balloon to the ulnar artery reaches a blockage pressure, and controlling the radial artery balloon to inflate or deflate until the pressure applied by the radial artery balloon to the radial artery reaches the target pressure. In the application, the blood flow of the radial artery is ensured to be unobstructed to avoid radial artery occlusion.

Description

Technical Field

[0001] This application relates to the field of image processing technology, and in particular to a radial artery compressor control method and related equipment. Background Technology

[0002] Radial artery puncture is a common clinical procedure used to obtain arterial blood samples or for treatment procedures such as arterial catheterization. However, radial artery puncture can cause symptoms such as hematoma and bleeding at the puncture site. Bandages are usually used for bandaging, but the bandages can adhere to the arterial sheath used for puncture, making subsequent maintenance difficult. At the same time, the continuous pressure of the bandage on the puncture site can cause obstruction of blood flow, etc.

[0003] To prevent bleeding after radial artery puncture, devices such as compression devices have been developed for applying pressure to the puncture site to stop the bleeding. These compression devices are used by medical personnel, but they often cannot control the pressure applied, leading to improper compression and symptoms such as bruising, swelling, pain, and occlusion at the radial artery puncture site. The principle of open-flow radial artery compression is to maintain the patency of the radial artery during compression to reduce the risk of vascular occlusion.

[0004] In the exemplary technology, pulse wave amplitude or blood oxygen saturation at the finger is detected for estimation. However, the pulse wave amplitude varies greatly from person to person and also shows great differences under different conditions. Therefore, it cannot accurately assess blood flow, which can lead to radial artery occlusion. In other words, inaccurate blood flow detection can cause radial artery occlusion. Summary of the Invention

[0005] This application provides a radial artery compressor control method and related equipment, which solves the problem of radial artery occlusion caused by inaccurate blood flow detection.

[0006] Firstly, this application provides a method for controlling a radial artery compressor.

[0007] An application is made to a radial artery compressor, the radial artery compressor comprising an image acquisition component, a radial artery balloon, and a ulnar artery balloon, the control method of the radial artery compressor comprising:

[0008] The image acquisition component acquires a first laser blood image of the hand region of the target object, wherein the target object is used to indicate a user wearing the radial artery compressor;

[0009] The target speckle contrast is determined based on the pixel intensity of the pixels in the first laser blood image, and the current blood flow rate of the hand region is determined based on the target speckle contrast.

[0010] When the current blood flow rate indicates a risk of radial artery occlusion, the ulnar artery balloon is deflated, and a target pressure is determined based on the highest pressure pulse wave amplitude of the target object during the deflation of the ulnar artery balloon. The target pressure is the pressure applied to the ulnar artery by the ulnar artery balloon when the pressure pulse wave amplitude of the target object is at its highest pressure pulse wave amplitude.

[0011] The ulnar artery balloon is inflated until the pressure applied to the ulnar artery by the ulnar artery balloon reaches the blocking pressure, and the radial artery balloon is inflated or deflated until the pressure applied to the radial artery by the radial artery balloon reaches the target pressure. The blocking pressure is used to indicate the pressure when the ulnar artery balloon compresses and closes the ulnar artery.

[0012] In one embodiment, after determining the current blood flow rate of the hand region based on the target speckle contrast, the method further includes:

[0013] Obtain the blood flow threshold of the radial artery under conditions of risk of occlusion;

[0014] If the current blood flow rate is less than the blood flow threshold, it is determined that the radial artery is at risk of occlusion.

[0015] In one embodiment, obtaining the blood flow threshold of the radial artery under the risk of occlusion includes:

[0016] The radial artery balloon and the ulnar artery balloon are inflated until the pressure applied by the radial artery balloon to the radial artery and the pressure applied by the ulnar artery balloon to the ulnar artery both reach the occlusion pressure.

[0017] The image acquisition component acquires a second laser blood image of the hand region, and determines the initial blood flow rate of the hand region based on the pixel intensity of the pixels in the second laser blood image.

[0018] Control the deflation of the ulnar artery balloon, and determine the initial pressure based on the highest pressure pulse wave amplitude of the target object during the deflation of the ulnar artery balloon, wherein the initial pressure is the pressure applied to the ulnar artery by the ulnar artery balloon when the pressure pulse wave amplitude of the target object is the highest pressure pulse wave amplitude;

[0019] The ulnar artery balloon is inflated until the pressure applied to the ulnar artery by the ulnar artery balloon reaches the initial pressure, and a third laser blood image of the hand region is acquired by the image acquisition component.

[0020] Based on the pixel intensity of the pixels in the third laser blood image, a reference blood flow rate for the hand region is determined, and based on the reference blood flow rate and the initial blood flow rate, a blood flow threshold for the radial artery under the risk of occlusion is determined.

[0021] In one embodiment, acquiring a first laser blood image of the hand region of the target object acquired by the image acquisition component includes:

[0022] Control the inflation of the ulnar artery balloon until the pressure applied to the ulnar artery by the ulnar artery balloon reaches the occlusion pressure;

[0023] Control the deflation of the radial artery balloon until the pressure applied to the radial artery by the radial artery balloon reaches the initial pressure;

[0024] The image acquisition component is controlled to acquire laser blood images of the hand area of ​​the target object at set intervals to obtain the first laser blood image.

[0025] In one embodiment, determining that the radial artery has a risk of occlusion includes:

[0026] Obtain the duration during which the current blood flow rate is less than the blood flow threshold;

[0027] If the duration reaches the set duration, it is determined that the radial artery is at risk of occlusion.

[0028] In one embodiment, determining the target speckle contrast based on the pixel intensity of pixels in the first laser blood image includes:

[0029] In the first laser blood image, a region of interest is determined, and the pixel variance and average pixel intensity are determined based on the pixel intensity of the pixels in the region of interest. The total speckle contrast is determined based on the pixel intensity and the average pixel intensity.

[0030] Determine the noise contrast corresponding to the first laser blood image, and determine the target speckle contrast based on the noise contrast and the total speckle contrast.

[0031] In one embodiment, determining the noise contrast corresponding to the first laser blood image includes:

[0032] The shot noise variance is determined based on the gain parameters of the image acquisition component;

[0033] The time variance is determined based on the images acquired by the image acquisition component under set conditions.

[0034] The noise contrast corresponding to the first laser blood image is determined based on the shot noise variance, the time variance, and the set quantization noise variance.

[0035] Secondly, this application provides a radial artery compressor, comprising:

[0036] The acquisition module is used to acquire a first laser blood image of the hand region of a target object acquired by the image acquisition component of the radial artery compressor, wherein the target object is used to indicate a user wearing the radial artery compressor;

[0037] The determination module is used to determine the target speckle contrast based on the pixel intensity of the pixels in the first laser blood image, and to determine the current blood flow rate of the hand region based on the target speckle contrast.

[0038] The first control module is used to control the ulnar artery balloon of the radial artery compressor to deflate when the current blood flow rate indicates that there is a risk of radial artery occlusion, and to determine the target pressure based on the highest pressure pulse wave amplitude of the target object during the deflation of the ulnar artery balloon, wherein the target pressure is the pressure applied to the ulnar artery by the ulnar artery balloon when the pressure pulse wave amplitude of the target object is the highest pressure pulse wave amplitude.

[0039] The second control module is used to control the inflation of the ulnar artery balloon until the pressure applied by the ulnar artery balloon to the ulnar artery reaches the blocking pressure, and to control the inflation or deflation of the radial artery balloon of the radial artery compressor until the pressure applied by the radial artery balloon to the radial artery reaches the target pressure. The blocking pressure is used to indicate the pressure when the ulnar artery balloon compresses the ulnar artery to close.

[0040] Thirdly, this application provides a radial artery compressor, including an image acquisition component, a radial artery balloon, a ulnar artery balloon, a processor, and a memory and a communication interface communicatively connected to the processor. The image acquisition component, the radial artery balloon, and the ulnar artery balloon are all communicatively connected to the processor.

[0041] The communication interface is used to communicate with other communication devices;

[0042] The memory is used to store computer-executed instructions;

[0043] The processor is used to execute computer execution instructions stored in the memory to implement the radial artery compressor control method as described above.

[0044] Fourthly, this application provides a computer-readable storage medium storing computer-executable instructions that, when executed by a processor, implement the radial artery compressor control method as provided in the first aspect.

[0045] Fifthly, this application provides a computer program product, including a computer program that, when executed by a processor, implements the radial artery compressor control method as provided in the first aspect.

[0046] The radial artery compressor control method and related equipment provided in this application acquire laser blood images of the hand area of ​​the user wearing the radial artery compressor, obtain speckle contrast based on the laser blood images, and determine the current blood flow rate of the hand area through speckle contrast. If the current blood flow rate indicates that there is a risk of radial artery occlusion, the ulnar artery balloon of the radial artery compressor is deflated to obtain the target pressure. The ulnar artery balloon is then inflated until the pressure applied to the ulnar artery by the ulnar artery balloon reaches the blocking pressure. The radial artery balloon of the radial artery compressor is inflated or deflated so that the pressure applied to the radial artery by the radial artery balloon reaches the target pressure. In this application, the speckle contrast can reflect the movement rate of red blood cells in the blood of the user's hand wearing a radial artery compressor, thereby accurately determining the blood flow rate of the user's hand based on the movement rate. When the blood flow rate indicates a risk of radial artery occlusion, the pressure of the ulnar artery balloon is controlled to the blocking pressure to compress and close the user's ulnar artery, increasing the blood flow into the radial artery and thus preventing radial artery occlusion. Furthermore, with the pressure of the ulnar artery balloon controlled to the blocking pressure, the pressure of the radial artery balloon is controlled to reach the target pressure. The target pressure is the pressure applied to the ulnar artery by the ulnar artery balloon when the user's pressure pulse wave amplitude is at its maximum pressure pulse wave amplitude. The radial artery has sufficient blood supply at the maximum pressure pulse wave amplitude, thus maintaining the unobstructed blood flow in the radial artery. That is, with the accurate blood flow rate obtained in advance, the radial artery balloon and the ulnar artery balloon in the radial artery compressor are inflated and deflated to ensure unobstructed blood flow in the radial artery and avoid radial artery occlusion. Attached Figure Description

[0047] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0048] Figure 1 This is a schematic diagram of the radial artery compressor in this application;

[0049] Figure 2 This is a schematic diagram illustrating the use of the radial artery compressor in this application;

[0050] Figure 3This is one of the step flow diagrams of the radial artery compressor control method provided in the embodiments of this application;

[0051] Figure 4 This is the second schematic diagram of the steps of the radial artery compressor control method provided in the embodiments of this application;

[0052] Figure 5 This is the third step of the flowchart illustrating the radial artery compressor control method provided in the embodiments of this application;

[0053] Figure 6 This is the fourth step of the flowchart illustrating the radial artery compressor control method provided in the embodiments of this application;

[0054] Figure 7 This is a schematic diagram of the program module of a radial artery compressor provided in the embodiments of this application;

[0055] Figure 8 This is a schematic diagram of the hardware structure of a radial artery compressor provided in an embodiment of this application.

[0056] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0057] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. Furthermore, although the disclosure in this application is described according to one or several exemplary examples, it should be understood that each aspect of these disclosures can also constitute a complete implementation method on its own.

[0058] It should be noted that the brief descriptions of terms in this application are only for the convenience of understanding the embodiments described below, and are not intended to limit the embodiments of this application. Unless otherwise stated, these terms should be understood in their ordinary and common meaning.

[0059] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover but not exclusively include, for example, a product or device that includes a series of components is not necessarily limited to those that are explicitly listed, but may include other components that are not explicitly listed or that are inherent to such product or device.

[0060] The term "module" as used in the embodiments of this application refers to any known or subsequently developed hardware, software, firmware, artificial intelligence, fuzzy logic, or combination of hardware and / or software code capable of performing the functions associated with that element.

[0061] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, data stored, data displayed, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties. Furthermore, the collection, use and processing of the relevant data must comply with relevant laws, regulations and standards, and corresponding operation entry points are provided for users to choose to authorize or refuse.

[0062] Radial artery puncture is a common clinical procedure used to obtain arterial blood samples or for treatment procedures such as arterial catheterization. However, radial artery puncture can cause symptoms such as hematoma and bleeding at the puncture site. Bandage is usually used for bandaging, but the bandage can adhere to the arterial sheath used for puncture, making subsequent maintenance inconvenient; at the same time, the continuous pressure of the bandage on the puncture site can cause obstruction of blood flow, etc.

[0063] To prevent bleeding after radial artery puncture, devices such as compression devices have been developed for applying pressure to the puncture site to stop the bleeding. These compression devices are used by medical personnel, but they often cannot control the pressure applied, leading to improper compression and symptoms such as bruising, swelling, pain, and occlusion at the radial artery puncture site. The principle of open-flow radial artery compression is to maintain the patency of the radial artery during compression to reduce the risk of vascular occlusion.

[0064] The inventors of this application have discovered that estimating blood flow by detecting the amplitude of the pulse wave or blood oxygen saturation at the fingertip is not feasible because the amplitude of the pulse wave varies greatly from person to person and also shows significant differences under different conditions. This can lead to radial artery occlusion due to inaccurate blood flow detection.

[0065] The inventors of this application therefore conceived that speckle contrast can reflect the movement rate of red blood cells in the blood of a user wearing a radial artery compressor, thereby accurately determining the blood flow rate of the user's hand based on the movement rate. When the blood flow rate indicates a risk of radial artery occlusion, the pressure of the ulnar artery balloon is controlled to a blocking pressure to compress and close the user's ulnar artery, increasing the blood flow into the radial artery and thus preventing radial artery occlusion. Furthermore, with the ulnar artery balloon pressure controlled to a blocking pressure, the pressure of the radial artery balloon is controlled to reach a target pressure. The target pressure is the pressure applied to the ulnar artery by the ulnar artery balloon when the user's pressure pulse wave amplitude is at its highest pressure pulse wave amplitude. The radial artery has a relatively sufficient blood supply at its highest pressure pulse wave amplitude, thus maintaining the unobstructed blood flow in the radial artery. That is, with the accurate blood flow rate obtained in advance, the radial artery balloon and the ulnar artery balloon in the radial artery compressor are inflated and deflated to ensure unobstructed blood flow in the radial artery and avoid radial artery occlusion.

[0066] The following is for reference Figure 1 The structure of the radial artery compressor of this application will be described. For example... Figure 1 As shown, the radial artery compressor is equipped with a wristband 101, on which a radial artery balloon 102 and a ulnar artery balloon 103 are mounted, and the entire unit 104 of the radial artery compressor is also mounted on the wristband 101. The entire unit 104 includes a screen 105, buttons 106, a laser emitter 107, and an image receiver 108. Furthermore, both the radial artery balloon 102 and the ulnar artery balloon 103 are equipped with electronic valves (not shown) and air pumps (not shown). The entire unit 104 is connected to the air pumps and electronic valves. The entire unit 104 controls the inflation of the ulnar artery balloon 103 and the radial artery balloon 102 via the air pumps, and deflates the ulnar artery balloon 103 and the radial artery balloon 102 via the electronic valves. Additionally, both the ulnar artery balloon 103 and the radial artery balloon 102 are connected to corresponding pressure sensors (not shown), which transmit the collected pressure data to the entire unit 104.

[0067] When radial artery hemostasis is required, the user wears a wristband 101, in which a radial artery balloon 102 is configured to compress the user's radial artery, and a ulnar artery balloon 103 is configured to compress the user's ulnar artery. The device 104 controls the inflation of the radial artery balloons 102 and ulnar artery balloons 103 via an air pump, or controls their deflation via an electronic valve. Pressure sensors detect the pressure data applied to the ulnar and radial arteries by the balloons and send this data to the device 104. The processor in the device 104 separates the pressure data; the direct current obtained is the pressure applied to the user by the balloons, and the alternating current is the pressure pulse wave. The universal pressure pulse wave can be used to calculate the user's diastolic blood pressure, systolic blood pressure, and mean blood pressure, thereby determining the degree of vascular occlusion in the hand. Additionally, the screen 105 can display the data detected by the device 104, and the buttons 106 can be used to input commands or control other components.

[0068] Reference Figure 2 , Figure 2 This is a diagram illustrating the use of a radial artery compressor. (Example) Figure 2 As shown, the laser emitter and image receiver clamp the finger in the form of a clip to detect blood flow; alternatively, the laser emitter and image receiver can be arranged on the same side of the hand. The laser emitter sends a laser beam to the finger, and the image receiver receives the laser beam carrying blood flow information from the finger to form a laser blood image. The image receiver transmits the acquired laser blood image to the optical signal acquisition chip in the radial artery compressor via a wire. The radial artery balloon and the ulnar artery balloon are connected to the device via a trachea. The device includes a module for controlling the air pump and valves, and this module can also receive pressure data transmitted from the pressure sensors of the radial or ulnar artery balloons. The device includes display, communication, and button functions, and includes a controller (MCU) and a processor (CPU). The MCU sends instructions to various components, and the CPU processes data and sends instructions back to the MCU.

[0069] The following is passed Figure 1 , Figure 2 The technical solutions shown in this application will be described in detail with reference to specific embodiments. It should be noted that the following embodiments may exist independently or in combination with each other, and the same or similar content will not be described again in different embodiments.

[0070] Reference Figure 3 , Figure 3 This is one of the flowcharts illustrating the radial artery compressor control method provided in this application embodiment. The radial artery compressor control method includes:

[0071] Step S301: Acquire a first laser blood image of the hand area of ​​the target object by the image acquisition component. The target object is used to indicate a user wearing a radial artery compressor.

[0072] In this embodiment, the user wears a radial artery compressor for hemostasis after radial artery puncture. The user wearing the radial artery compressor is defined as the target object. The radial artery compressor is worn on the wrist so that the center of the radial artery balloon is directly opposite the radial artery puncture point, and part of the sheath is pulled out. The laser emitter and image receiver clamp the hand area of ​​the target object, such as the fingers.

[0073] After the target subject wears the radial artery compressor, the compressor first inflates the radial and ulnar artery balloons according to the set conditions, ensuring unobstructed blood flow in the radial artery, and then completely withdraws the arterial sheath. However, during the process of radial artery hemostasis, the blood flow in the radial artery may decrease, potentially leading to radial artery occlusion. Therefore, it is necessary to check the blood flow in the hand area at regular intervals to avoid radial artery occlusion.

[0074] The radial artery compressor is equipped with an image acquisition component, which includes a laser emitter and an image receiver. The radial artery compressor controls the laser emitter to emit laser light toward the hand area. The laser source can be a long coherent light source with various wavelengths. For example, the reference coherent light can be, but is not limited to, coherent light of 520nm, 575nm, 650nm, 732nm, 780nm, 795nm, 808nm, and 830nm.

[0075] The light emitted by the laser emitter passes through dynamic scatterers such as red blood cells in the hand area and enters the image receiver, thus the emitted light carries information about the movement of the red blood cells. The image receiver receives the emitted light and forms a laser blood image. This laser blood image carries the movement information of the red blood cells, and therefore the blood flow rate in the hand area can be determined from the laser blood image. The laser blood image acquired by the image acquisition unit is defined as the first laser blood image.

[0076] Step S302: Determine the target speckle contrast based on the pixel intensity of the pixels in the first laser blood image, and determine the current blood flow rate of the hand region based on the target speckle contrast.

[0077] In this embodiment, the laser blood flow measurement technology employs speckle contrast spectroscopy. Based on the principles of light interference and tissue optics, coherent light (laser) is scattered by tissue, forming numerous independent scattered wavelets. These wavelets interfere during spatial propagation, forming granular speckle patterns. If scattered by relatively stationary tissue, the resulting speckle pattern remains essentially unchanged over time, termed static speckle. However, if scattered by moving red blood cells in the bloodstream, dynamic speckle is formed. Blood flow information is obtained by calculating the dynamic speckle pattern. Therefore, after obtaining a first laser blood image, the target speckle contrast is determined based on the pixel intensity of the pixels in the first laser blood image, and then the current blood flow rate in the hand region is determined using the target speckle contrast.

[0078] For example, speckle images are calculated to represent the standard deviation σ and the average value of pixel intensity within a certain spatial range. In a speckle image, a region of interest (ROI) is selected, such as a 400×400 pixel area. The ROI is then divided into sliding windows of a certain size, such as a 7×7 pixel sliding window. The speckle contrast K is calculated using the following formula:

[0079] K = σ /

[0080] Standard deviation σ and mean It can be determined by the pixel intensity of the pixels within the region of interest (ROI). The current blood flow rate is the reciprocal of the square of the target speckle contrast.

[0081] Step S303: When the current blood flow rate indicates a risk of radial artery occlusion, the ulnar artery balloon is deflated, and the target pressure is determined based on the highest pressure pulse wave amplitude of the target subject during the deflation of the ulnar artery balloon. The target pressure is the pressure applied to the ulnar artery by the ulnar artery balloon when the pressure pulse wave amplitude of the target subject is the highest pressure pulse wave amplitude.

[0082] After obtaining the current blood flow rate, the radial artery compressor determines whether the radial artery is occluded based on this rate. The radial artery compressor has a preset threshold; if the current blood flow rate is less than the preset threshold, it is determined that the radial artery is at risk of occlusion.

[0083] When there is a risk of radial artery occlusion, the radial artery compressor controls the ulnar artery balloon to deflate. During the deflation process, the pressure sensor of the ulnar artery balloon transmits the detected pressure data to the radial artery compressor. The radial artery compressor obtains the pressure pulse wave amplitude during the ulnar artery deflation process through the pressure data, thereby obtaining the highest pressure pulse wave amplitude. Based on the highest pressure pulse wave amplitude, the target pressure is determined. The target pressure is the pressure applied to the ulnar artery by the ulnar artery balloon when the pressure pulse wave of the target object is the highest pressure pulse wave.

[0084] Step S304: Control the ulnar artery balloon to inflate until the pressure applied to the ulnar artery by the ulnar artery balloon reaches the blocking pressure, and control the radial artery balloon to inflate or deflate until the pressure applied to the radial artery by the radial artery balloon reaches the target pressure. The blocking pressure is used to indicate the pressure when the ulnar artery balloon compresses and closes the ulnar artery.

[0085] After determining the target pressure, the radial artery compressor inflates the ulnar artery balloon until the pressure applied to the ulnar artery by the balloon reaches the occlusion pressure, which is the pressure at which the ulnar artery balloon closes the ulnar artery. After the ulnar artery closes, the radial artery compressor then inflates or deflates the radial artery balloon until the pressure applied to the radial artery reaches the target pressure. For example, if the current pressure applied to the radial artery by the balloon is less than the target pressure, the balloon needs to be inflated until the pressure reaches the target pressure; if the current pressure applied to the radial artery by the balloon is greater than the target pressure, the balloon needs to be deflated until the pressure reaches the target pressure. Since the ulnar and radial arteries are the two major branches of the upstream brachial artery, when the ulnar artery closes, the blood flow to the radial artery increases. When the radial artery pressure reaches the target pressure, the target patient's pressure pulse wave amplitude is at its highest, and at this time, the blood supply to the radial artery also increases.

[0086] It should be noted that after the radial artery balloon applies pressure to the radial artery to reach the target pressure, a laser image of the target's hand area will be acquired again at intervals. This laser image is used to determine whether there is a risk of radial artery occlusion in the target's radial artery. The pressure applied to the radial artery by the radial artery balloon is then adjusted in a timely manner to ensure that the air pressure applied to the radial artery by the radial artery balloon reaches the detection pressure (the detection pressure is the pressure applied to the ulnar artery by the ulnar artery balloon when the pressure pulse wave amplitude of the target is at its maximum). This avoids the situation where the pressure applied to the radial artery by the radial artery balloon is too low, which could lead to radial artery bleeding. In other words, this embodiment can prevent bleeding at the radial artery puncture site.

[0087] In this embodiment, laser blood images are acquired from the hand area of ​​the user wearing the radial artery compressor, and speckle contrast is obtained based on the laser blood images. The current blood flow rate in the hand area is then determined by the speckle contrast. If the current blood flow rate indicates that there is a risk of radial artery occlusion, the ulnar artery balloon of the radial artery compressor is deflated to obtain the target pressure. The ulnar artery balloon is then inflated until the pressure applied to the ulnar artery by the ulnar artery balloon reaches the blocking pressure. The radial artery balloon of the radial artery compressor is inflated so that the pressure applied to the radial artery by the radial artery balloon reaches the target pressure. In this application, the speckle contrast can reflect the movement rate of red blood cells in the blood of the user's hand wearing a radial artery compressor, thereby accurately determining the blood flow rate of the user's hand based on the movement rate. When the blood flow rate indicates a risk of radial artery occlusion, the pressure of the ulnar artery balloon is controlled to the blocking pressure to compress and close the user's ulnar artery, increasing the blood flow into the radial artery and thus preventing radial artery occlusion. Furthermore, with the pressure of the ulnar artery balloon controlled to the blocking pressure, the pressure of the radial artery balloon is controlled to reach the target pressure. The target pressure is the pressure applied to the ulnar artery by the ulnar artery balloon when the user's pressure pulse wave amplitude is at its maximum pressure pulse wave amplitude. The radial artery has sufficient blood supply at the maximum pressure pulse wave amplitude, thus maintaining the unobstructed blood flow in the radial artery. That is, with the accurate blood flow rate obtained in advance, the radial artery balloon and the ulnar artery balloon in the radial artery compressor are inflated and deflated to ensure unobstructed blood flow in the radial artery and avoid radial artery occlusion.

[0088] Reference Figure 4 , Figure 4 This is the second flowchart illustrating the radial artery compressor control method of this application, based on... Figure 3 In the embodiment shown, after step S302, the method further includes:

[0089] Step S401: Obtain the blood flow threshold of the radial artery under the risk of occlusion;

[0090] Step S402: If the current blood flow rate is less than the blood flow threshold, determine that the radial artery is at risk of occlusion.

[0091] In this embodiment, after obtaining the current blood flow rate, the radial artery compressor determines whether the radial artery is occluded based on the current blood flow rate. For example, the radial artery compressor is equipped with a blood flow threshold. If the current blood flow threshold is less than the current blood flow threshold, it can be determined that the radial artery is at risk of occlusion. It should be noted that the radial artery compressor is equipped with a prediction model. By inputting the target object's vital signs information into the prediction model, the prediction model outputs a blood flow threshold. The vital signs information includes parameters such as the target object's physical characteristics, height, gender, medical records, and heart rate. The prediction model is a deep learning model, which learns from the training feature information of different users to obtain the blood flow rate of the radial artery nearing occlusion for different populations, which is then used as the corresponding blood flow threshold for that population. It can be understood that the prediction model determines the population to which the target object belongs based on the target object's vital signs information, and then uses the learned blood flow threshold for that population as the blood flow rate of the target object's radial artery nearing occlusion; that is, the prediction model outputs the target object's blood flow threshold.

[0092] Furthermore, when the current blood flow rate is less than the blood flow threshold, the blood flow rate is continuously acquired. After each acquisition, the acquired blood flow rate is compared with the blood flow threshold to obtain the duration during which the current blood flow is less than the blood flow threshold. If the duration reaches the set duration, it can be determined that the low blood flow rate is not caused by blood flow fluctuations in the target object, but is a continuous state. Therefore, it can be determined that there is a risk of radial artery occlusion.

[0093] In this embodiment, the risk of radial artery occlusion is accurately determined based on the blood flow threshold.

[0094] Reference Figure 5 , Figure 5 This is the third flowchart illustrating the radial artery compressor control method of this application, based on... Figure 4 In the embodiment shown, step S401 includes:

[0095] Step S501: Control the inflation of the radial artery balloon and the ulnar artery balloon until the pressure applied by the radial artery balloon to the radial artery and the pressure applied by the ulnar artery balloon to the ulnar artery both reach the occlusion pressure.

[0096] In this embodiment, after the target subject wears a radial artery compressor, the blood flow threshold of the target subject is determined by operating the radial artery compressor on the target subject.

[0097] For example, the radial artery compressor inflates both the radial and ulnar artery balloons until the pressure applied to the radial artery by the radial artery balloon and the pressure applied to the ulnar artery by the ulnar artery balloon both reach the occlusion pressure, which is the initial occlusion pressure set by the blood flow monitored by medical personnel. The occlusion pressure is the pressure applied to the ulnar artery by the ulnar artery balloon to close the ulnar artery.

[0098] Step S502: Acquire a second laser blood image of the hand region by the image acquisition component, and determine the initial blood flow rate of the hand region based on the pixel intensity of the pixels in the second laser blood image.

[0099] After the pressure applied by both the ulnar and radial artery balloons reaches the occlusion pressure P0, a laser blood image of the hand region is acquired through the image acquisition component. This laser blood image is defined as the second laser blood image, and the blood flow rate of the hand region is determined based on the pixel intensity of the pixels in the second laser blood image as the initial blood flow rate BFi0. The process for determining the initial blood flow rate is the same as that for the current blood flow threshold, as explained above, and will not be repeated here.

[0100] Step S503: Control the deflation of the ulnar artery balloon and determine the initial pressure based on the highest pressure pulse wave amplitude of the target object during the deflation process of the ulnar artery balloon. The initial pressure is the pressure applied to the ulnar artery by the ulnar artery balloon when the pressure pulse wave amplitude of the target object is the highest pressure pulse wave amplitude.

[0101] After determining the initial blood flow rate, the radial artery compressor controls the ulnar artery balloon to deflate, i.e., to deflate slowly. During the deflation of the ulnar artery balloon, the pressure sensor of the ulnar artery balloon transmits the detected pressure data to the radial artery compressor. The radial artery compressor uses the pressure data to obtain the pressure pulse wave amplitude during the ulnar artery deflation process, thereby determining the highest pressure pulse wave amplitude. The initial pressure is then determined based on the highest pressure pulse wave amplitude. The initial pressure is the pressure applied to the ulnar artery by the ulnar artery balloon when the target object's pressure pulse wave is at its highest pressure pulse wave.

[0102] Step S504: Control the ulnar artery balloon to inflate until the pressure applied to the ulnar artery by the ulnar artery balloon reaches the initial pressure, and acquire the third laser blood image of the hand area acquired by the image acquisition component.

[0103] After determining the initial pressure, the radial artery compressor controls the ulnar artery balloon to inflate until the pressure applied to the ulnar artery by the ulnar artery balloon reaches the initial pressure. Once the pressure applied to the ulnar artery by the ulnar artery balloon reaches the initial pressure, a third laser blood image of the hand region is acquired by the image acquisition component.

[0104] Step S505: Determine the reference blood flow rate of the hand region based on the pixel intensity of the pixels in the third laser blood image, and determine the blood flow threshold of the radial artery under the risk of occlusion based on the reference blood flow rate and the initial blood flow rate.

[0105] The radial artery compressor determines the blood flow rate in the hand region as a reference blood flow rate BFi1 based on the pixel intensity of the pixels in the third laser image. The calculation method of the reference blood flow rate is the same as that of the current blood flow rate, and the details are described in the current blood flow rate description, which will not be repeated here.

[0106] After determining the reference blood flow rate BFi1, a blood flow threshold is determined based on the reference blood flow rate and the initial blood flow rate. For example, the blood flow threshold = 0.5(BFi1 + BFi0), which is half of the sum of the reference blood flow rate and the initial blood flow rate.

[0107] It should be noted that steps S501 to S505 occur before step S301, while step S402 occurs between steps S302 and S303.

[0108] Furthermore, in this embodiment, after determining the blood flow threshold, the radial artery compressor controls the inflation and deflation of the radial and ulnar artery balloons to ensure the patency of the radial artery in the target subject. For example, the radial artery compressor controls the ulnar artery to inflate until the pressure applied by the ulnar artery balloon to the ulnar artery reaches the blocking pressure, and controls the radial artery balloon to deflate until the pressure applied by the radial artery balloon to the radial artery reaches the initial pressure. In this case, the radial artery is patent and will not be blocked. However, the radial artery compressor needs to control the image acquisition component to acquire laser blood images of the target subject's hand area at set intervals to obtain the first laser blood image. The set interval can be any suitable duration, for example, 30 minutes. In addition, by deflating the ulnar artery balloon, the amplitude of the highest pressure pulse wave can be identified, thereby determining the initial pressure and the target pressure. After determining the target pressure and the initial pressure, the ulnar artery balloon is then inflated to P0, which can alleviate the discomfort of continuous high pressure and compress the ulnar artery to close, thus supplying more blood flow to the radial artery and preventing radial artery occlusion.

[0109] It should be noted that in this embodiment, the ulnar artery is mostly blocked, meaning the pressure applied to the ulnar artery by the ulnar artery balloon is the blocking pressure, and the first laser blood image is acquired under these conditions. However, the pressure applied to the ulnar artery by the ulnar artery balloon can be reduced at intervals. In this case, the pressure applied to the ulnar artery by the ulnar artery balloon is less than the blocking pressure, allowing the compressed area of ​​the ulnar artery to relax and improve blood supply. However, after the pressure applied to the ulnar artery by the ulnar artery balloon remains less than the blocking pressure for a preset duration, the ulnar artery balloon needs to be inflated until the pressure applied to the ulnar artery by the ulnar artery balloon reaches the blocking pressure to improve blood supply to the radial artery. Additionally, when the ulnar artery balloon detects the maximum pulse wave amplitude, the pressure applied to the ulnar artery by the ulnar artery balloon is less than the blocking pressure, which can relax the compressed area of ​​the ulnar artery and improve blood supply.

[0110] In this embodiment, the radial artery compressor inflates and deflates the radial artery balloon and the ulnar artery balloon to obtain the blood flow threshold of the target object in real time and accurately determine whether the radial artery is occluded.

[0111] Reference Figure 6 , Figure 6 This is the fourth flowchart illustrating the radial artery compressor control method of this application, based on... Figures 3 to 5 In any of the embodiments shown, step S302 includes:

[0112] Step S601: Determine the region of interest in the first laser blood image, and determine the pixel variance and average pixel intensity based on the pixel intensity of the pixels in the region of interest, and determine the total speckle contrast based on the pixel intensity and average pixel intensity.

[0113] In this embodiment, the radial artery compressor determines the region of interest (ROI) in the first laser blood image, and then determines the pixel variance and average pixel intensity based on the pixel intensity of the pixels in the ROI. Finally, the total speckle contrast is determined based on the pixel intensity and average pixel intensity. The total speckle contrast is:

[0114] K = σ /

[0115] Where the standard deviation is σ, and the average pixel intensity is .

[0116] Step S602: Determine the noise contrast corresponding to the first laser blood image, and determine the target speckle contrast based on the noise contrast and the total speckle contrast.

[0117] In this embodiment, the measured speckle contrast includes a noise contribution, which needs to be subtracted from the total contrast. Therefore, after obtaining the total speckle contrast, the noise contrast is determined based on the first laser blood image, and then the target speckle contrast is determined using both the total speckle contrast and the noise contrast.

[0118] In one example, the noise contrast can be the shot noise variance, which is:

[0119] Where g is the gain parameter of the image receiver, and I is the pixel intensity of the pixel in the image acquired by the image receiver.

[0120] In another example, the noise contains multiple forms. The Mikasa noise variance is first determined using the gain parameter of the image acquisition unit. The radial artery compressor then determines the temporal variance based on images acquired by the image acquisition unit under set conditions. For example, the set condition is no illumination, meaning the image acquisition unit acquires images in the absence of light, and the temporal variance of the acquired image pixels is calculated. The temporal variance is:

[0121] Where n is the number of pixels in the image, and I is the pixel intensity of the pixel.

[0122] The radial artery compressor determines the noise contrast corresponding to the first laser blood image based on shot noise variance, temporal variance, and a predefined quantized noise variance. For example, the noise contrast is:

[0123] Among them, the set quantization noise variance

[0124] After obtaining the noise contrast, the target speckle contrast can be determined using the noise contrast pair and the total speckle contrast. For example, K all This represents the total speckle contrast.

[0125] In this embodiment, noise contrast is removed from the total speckle contrast to accurately determine the target speckle contrast, thereby accurately determining the blood flow rate in the hand region.

[0126] Based on the above embodiments, a brief explanation of how the radial artery compressor ensures the patency of the user's radial artery is provided below:

[0127] 1. Place the radial artery compressor on the user's wrist, ensuring the center of the radial artery balloon is aligned with the radial artery puncture site, and then remove part of the sheath.

[0128] 2. Start the radial artery compression device and set the occlusion pressure to P0. P0 can be the initial occlusion pressure set by medical staff based on the monitored blood pressure. Inflate the radial artery balloon and ulnar artery balloon to P0. At this time, completely withdraw the arterial sheath.

[0129] 3. Record the blood flow BFi0 at this time. The blood flow at this time is the baseline for the blood flow in the finger after the ulnar and radial arteries are blocked. This value is used to determine whether the blood vessels are blocked and serves as a basis for adjustment and early warning.

[0130] 4. Slowly deflate the ulnar artery balloon;

[0131] 5. During the slow deflation of the ulnar artery balloon, the user's pressure pulse wave amplitude begins to decrease. Record the pressure P1 applied to the ulnar artery by the ulnar artery balloon at the highest pressure pulse wave amplitude.

[0132] 6. After determining the pressure P1, inflate the ulnar artery balloon to P1;

[0133] 7. Record blood flow BFi1 and P1;

[0134] 8. Reinflate the ulnar artery balloon to P0;

[0135] 9. Deflat the radial artery balloon to P1;

[0136] 10. The ulnar artery balloon is maintained at P0 and the radial artery balloon is maintained at P1;

[0137] 11. Real-time acquisition of the current blood flow rate (BFiC) and determination of whether BFiC is less than 0.5(BFi0+BFi1). If it is less, an alarm is triggered.

[0138] 12. If the duration of real-time monitored BFiC being less than 0.5(BFi0+BFi1) reaches the set duration T1, it can be determined that there is a risk of radial artery occlusion.

[0139] 13. In cases where there is a risk of radial artery occlusion, the ulnar artery balloon is slowly deflated until the pressure pulse amplitude decreases, thereby obtaining the target pressure P2 during the deflation process. The target pressure is the pressure applied to the ulnar artery by the ulnar artery balloon at the target object where the pressure pulse wave amplitude is the highest pressure pulse wave amplitude, and the pressure applied by the ulnar artery balloon is maintained at the target pressure for a time T2.

[0140] 14. Inflate the ulnar artery balloon to P0;

[0141] 15. Inflate the radial artery balloon to P2;

[0142] 16. Update P2 to P1, and after the pressure of the ulnar artery balloon is maintained at P0 and the pressure of the radial artery balloon is maintained at the updated P1 for the set time, return to step 11.

[0143] Based on the content described in the above embodiments, this application also provides a radial artery compressor, referring to... Figure 7 , Figure 7 This is a schematic diagram of the program modules of a radial artery compressor provided in an embodiment of this application. In some embodiments, the radial artery compressor 700 includes:

[0144] The acquisition module 710 is used to acquire a first laser blood image of the hand area of ​​the target object acquired by the image acquisition component, the target object being used to indicate a user wearing a radial artery compressor;

[0145] The determination module 720 is used to determine the target speckle contrast based on the pixel intensity of the pixels in the first laser blood image, and to determine the current blood flow rate of the hand region based on the target speckle contrast.

[0146] The first control module 730 is used to control the ulnar artery balloon to deflate when the current blood flow rate indicates that there is a risk of radial artery occlusion, and to determine the target pressure based on the highest pressure pulse wave amplitude of the target object during the deflation of the ulnar artery balloon, wherein the target pressure is the pressure applied to the ulnar artery by the ulnar artery balloon when the pressure pulse wave amplitude of the target object is the highest pressure pulse wave amplitude.

[0147] The second control module 740 is used to control the ulnar artery balloon to inflate until the pressure applied to the ulnar artery by the ulnar artery balloon reaches the blocking pressure, and to control the radial artery balloon to inflate or deflate until the pressure applied to the radial artery by the radial artery balloon reaches the target pressure. The blocking pressure is used to indicate the pressure when the ulnar artery balloon compresses and closes the ulnar artery.

[0148] In some embodiments, the radial artery compressor 700 is specifically used for:

[0149] Obtain the radial artery blood flow threshold under conditions of risk of occlusion;

[0150] If the current blood flow rate is less than the blood flow threshold, the radial artery is determined to be at risk of occlusion.

[0151] In some embodiments, the radial artery compressor 700 is specifically used for:

[0152] Inflate the radial artery balloon and the ulnar artery balloon until the pressure applied by the radial artery balloon to the radial artery and the pressure applied by the ulnar artery balloon to the ulnar artery both reach the occlusion pressure;

[0153] The image acquisition component acquires a second laser blood image of the hand region, and determines the initial blood flow rate of the hand region based on the pixel intensity of the pixels in the second laser blood image.

[0154] Control the deflation of the ulnar artery balloon and determine the initial pressure based on the highest pressure pulse wave amplitude of the target subject during the deflation process of the ulnar artery balloon. The initial pressure is the pressure applied to the ulnar artery by the ulnar artery balloon when the pressure pulse wave amplitude of the target subject is the highest pressure pulse wave amplitude.

[0155] Control the inflation of the ulnar artery balloon until the pressure applied to the ulnar artery by the ulnar artery balloon reaches the initial pressure, and acquire the third laser blood image of the hand area acquired by the image acquisition component;

[0156] Based on the pixel intensity of the pixels in the third laser blood image, the reference blood flow rate of the hand region is determined, and the blood flow threshold of the radial artery under the risk of occlusion is determined based on the reference blood flow rate and the initial blood flow rate.

[0157] In some embodiments, the radial artery compressor 700 is specifically used for:

[0158] Control the inflation of the ulnar artery balloon until the pressure applied by the ulnar artery balloon to the ulnar artery reaches the occlusion pressure;

[0159] Control the deflation of the radial artery balloon until the pressure applied to the radial artery by the radial artery balloon reaches the initial pressure;

[0160] The image acquisition unit is controlled by an interval setting time to acquire laser blood images of the hand area of ​​the target object, thus obtaining the first laser blood image.

[0161] In some embodiments, the radial artery compressor 700 is specifically used for:

[0162] Obtain the duration during which the current blood flow rate is less than the blood flow threshold;

[0163] If the duration of the condition reaches the set duration, the radial artery is determined to be at risk of occlusion.

[0164] In some embodiments, the radial artery compressor 700 is specifically used for:

[0165] In the first laser blood image, a region of interest is determined, and the pixel variance and average pixel intensity are determined based on the pixel intensity of the pixels in the region of interest. The total speckle contrast is then determined based on the pixel intensity and average pixel intensity.

[0166] Determine the noise contrast corresponding to the first laser blood image, and determine the target speckle contrast based on the noise contrast and the total speckle contrast.

[0167] In some embodiments, the radial artery compressor 700 is specifically used for:

[0168] The shot noise variance is determined based on the gain parameters of the image acquisition component;

[0169] Determine the time variance based on the images acquired by the image acquisition unit under set conditions;

[0170] The noise contrast corresponding to the first laser blood image is determined based on the shot noise variance, time variance, and the set quantization noise variance.

[0171] It should be noted that the specific steps in the radial artery compression control method are as described in the above embodiments, and will not be repeated here.

[0172] Furthermore, based on the content described in the above embodiments, this application also provides a radial artery compressor, which includes at least one processor, and a communication interface and a memory connected to the processor; wherein, the communication interface is used to communicate with other communication devices, and the memory stores computer execution instructions; the at least one processor executes the computer execution instructions stored in the memory to implement the various steps in the radial artery compressor control method described in the above embodiments.

[0173] To better understand the embodiments of this application, please refer to... Figure 8 , Figure 8 This is a schematic diagram of the hardware structure of a radial artery compressor provided in an embodiment of this application.

[0174] like Figure 8 As shown, the radial artery compressor 800 of this embodiment includes: a processor 801, a memory 802, and a communication interface 804. It also includes an image acquisition component, a radial artery balloon, and a ulnar artery balloon; wherein:

[0175] Memory 802 is used to store instructions executed by the computer;

[0176] Communication interface 804 is used to communicate with other communication devices;

[0177] The processor 801 is configured to execute computer execution instructions stored in memory to implement the various steps in the query optimization method described in the above embodiments.

[0178] Alternatively, the memory 802 can be either standalone or integrated with the processor 801.

[0179] When the memory 802 is set up independently, the device also includes a bus 803 for connecting the memory 802, the communication interface 804, and the processor 801.

[0180] This application provides a computer-readable storage medium storing computer-executable instructions. When a processor executes the computer-executable instructions, it implements the various steps of the radial artery compressor control method described in the above embodiment.

[0181] This application provides a computer program product, including a computer program that, when executed by a processor, implements the various steps of the radial artery compressor control method described in the above embodiments.

[0182] In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative; for instance, the division of modules is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple modules may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be indirect coupling or communication connection through some interfaces, devices, or modules, and may be electrical, mechanical, or other forms.

[0183] The modules described as separate components may or may not be physically separate. The components shown as modules may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0184] Furthermore, the functional modules in the various embodiments of this application can be integrated into one processing unit, or each module can exist physically separately, or two or more modules can be integrated into one unit. The unit composed of the above modules can be implemented in hardware or in the form of hardware plus software functional units.

[0185] The integrated modules described above, implemented as software functional modules, can be stored in a computer-readable storage medium. These software functional modules, stored in a storage medium, include several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) or processor to execute some steps of the methods of the various embodiments of this application.

[0186] It should be understood that the aforementioned processor can be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), etc. A general-purpose processor can be a microprocessor or any conventional processor. The steps of the method disclosed in the application can be directly manifested as being executed by a hardware processor, or executed by a combination of hardware and software modules within the processor.

[0187] The memory may include high-speed memory, and may also include non-volatile memory, such as at least one disk storage device, and may also be a USB flash drive, portable hard drive, read-only memory, disk or optical disc, etc.

[0188] The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. Buses can be categorized as address buses, data buses, control buses, etc. For ease of illustration, the buses shown in the accompanying drawings are not limited to a single bus or a single type of bus.

[0189] The aforementioned storage medium can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory, electrically erasable programmable read-only memory, erasable programmable read-only memory, programmable read-only memory, read-only memory, magnetic storage, flash memory, magnetic disk, or optical disk. The storage medium can be any available medium that can be accessed by a general-purpose or special-purpose computer.

[0190] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A method for controlling a radial artery compressor, characterized in that, An application is made to a radial artery compressor, the radial artery compressor comprising an image acquisition component, a radial artery balloon, and a ulnar artery balloon, the control method of the radial artery compressor comprising: The image acquisition component acquires a first laser blood image of the hand region of the target object, wherein the target object is used to indicate a user wearing the radial artery compressor; The target speckle contrast is determined based on the pixel intensity of the pixels in the first laser blood image, and the current blood flow rate of the hand region is determined based on the target speckle contrast. When the current blood flow rate indicates a risk of radial artery occlusion, the ulnar artery balloon is deflated, and a target pressure is determined based on the highest pressure pulse wave amplitude of the target object during the deflation of the ulnar artery balloon. The target pressure is the pressure applied to the ulnar artery by the ulnar artery balloon when the pressure pulse wave amplitude of the target object is at its highest pressure pulse wave amplitude. The ulnar artery balloon is inflated until the pressure applied to the ulnar artery by the ulnar artery balloon reaches the blocking pressure, and the radial artery balloon is inflated or deflated until the pressure applied to the radial artery by the radial artery balloon reaches the target pressure. The blocking pressure is used to indicate the pressure when the ulnar artery balloon compresses and closes the ulnar artery.

2. The method according to claim 1, characterized in that, After determining the current blood flow rate of the hand region based on the target speckle contrast, the method further includes: Obtain the blood flow threshold of the radial artery under conditions of risk of occlusion; If the current blood flow rate is less than the blood flow threshold, it is determined that the radial artery is at risk of occlusion.

3. The method according to claim 2, characterized in that, The step of obtaining the blood flow threshold of the radial artery under the risk of occlusion includes: The radial artery balloon and the ulnar artery balloon are inflated until the pressure applied by the radial artery balloon to the radial artery and the pressure applied by the ulnar artery balloon to the ulnar artery both reach the occlusion pressure. The image acquisition component acquires a second laser blood image of the hand region, and determines the initial blood flow rate of the hand region based on the pixel intensity of the pixels in the second laser blood image. Control the deflation of the ulnar artery balloon, and determine the initial pressure based on the highest pressure pulse wave amplitude of the target object during the deflation of the ulnar artery balloon, wherein the initial pressure is the pressure applied to the ulnar artery by the ulnar artery balloon when the pressure pulse wave amplitude of the target object is the highest pressure pulse wave amplitude; The ulnar artery balloon is inflated until the pressure applied to the ulnar artery by the ulnar artery balloon reaches the initial pressure, and a third laser blood image of the hand region is acquired by the image acquisition component. Based on the pixel intensity of the pixels in the third laser blood image, a reference blood flow rate for the hand region is determined, and based on the reference blood flow rate and the initial blood flow rate, a blood flow threshold for the radial artery under the risk of occlusion is determined.

4. The method according to claim 3, characterized in that, The acquisition of the first laser blood image of the hand region of the target object by the image acquisition component includes: Control the inflation of the ulnar artery balloon until the pressure applied to the ulnar artery by the ulnar artery balloon reaches the occlusion pressure; Control the deflation of the radial artery balloon until the pressure applied to the radial artery by the radial artery balloon reaches the initial pressure; The image acquisition component is controlled to acquire laser blood images of the hand area of ​​the target object at set intervals to obtain the first laser blood image.

5. The method according to claim 2, characterized in that, The determination that the radial artery is at risk of occlusion includes: Obtain the duration during which the current blood flow rate is less than the blood flow threshold; If the duration reaches the set duration, it is determined that the radial artery is at risk of occlusion.

6. The method according to any one of claims 1-5, characterized in that, Determining the target speckle contrast based on the pixel intensity of pixels in the first laser blood image includes: In the first laser blood image, a region of interest is determined, and the pixel variance and average pixel intensity are determined based on the pixel intensity of the pixels in the region of interest. The total speckle contrast is determined based on the pixel intensity and the average pixel intensity. Determine the noise contrast corresponding to the first laser blood image, and determine the target speckle contrast based on the noise contrast and the total speckle contrast.

7. The method according to claim 6, characterized in that, Determining the noise contrast corresponding to the first laser blood image includes: The shot noise variance is determined based on the gain parameters of the image acquisition component; The time variance is determined based on the images acquired by the image acquisition component under set conditions. The noise contrast corresponding to the first laser blood image is determined based on the shot noise variance, the time variance, and the set quantization noise variance.

8. A radial artery compressor, characterized in that, include: The acquisition module is used to acquire a first laser blood image of the hand region of a target object acquired by the image acquisition component of the radial artery compressor, wherein the target object is used to indicate a user wearing the radial artery compressor; The determination module is used to determine the target speckle contrast based on the pixel intensity of the pixels in the first laser blood image, and to determine the current blood flow rate of the hand region based on the target speckle contrast. The first control module is used to control the ulnar artery balloon of the radial artery compressor to deflate when the current blood flow rate indicates that there is a risk of radial artery occlusion, and to determine the target pressure based on the highest pressure pulse wave amplitude of the target object during the deflation of the ulnar artery balloon, wherein the target pressure is the pressure applied to the ulnar artery by the ulnar artery balloon when the pressure pulse wave amplitude of the target object is the highest pressure pulse wave amplitude. The second control module is used to control the inflation of the ulnar artery balloon until the pressure applied by the ulnar artery balloon to the ulnar artery reaches the blocking pressure, and to control the inflation or deflation of the radial artery balloon of the radial artery compressor until the pressure applied by the radial artery balloon to the radial artery reaches the target pressure. The blocking pressure is used to indicate the pressure when the ulnar artery balloon compresses the ulnar artery to close.

9. A radial artery compressor, characterized in that, It includes an image acquisition component, a radial artery balloon, a ulnar artery balloon, a processor, and a memory and a communication interface that are communicatively connected to the processor. The image acquisition component, the radial artery balloon, and the ulnar artery balloon are all communicatively connected to the processor. The communication interface is used to communicate with other communication devices; The memory is used to store computer-executed instructions; The processor is used to execute computer execution instructions stored in the memory to implement the radial artery compressor control method as described in any one of claims 1-7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer-executable instructions, which, when executed by a processor, implement the radial artery compressor control method as described in any one of claims 1-7.

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