Stepped air bag control method for preventing venous thrombosis based on infrared detection

Abstract

The invention provides a stepped air bag control method for preventing venous thrombosis based on infrared detection, and relates to the technical field of medical instrument control, and the method comprises the steps: obtaining the tissue oxygen saturation of at least one monitoring point of a target limb of a target user through a near-infrared sensor; when the target user is a hemiplegic individual, determining a control parameter of the stepped air bag according to the tissue oxygen saturation, and controlling the stepped air bag worn by the target limb to work according to the control parameter, so that the tissue oxygen saturation of the target limb reaches a preset state; the tissue oxygen saturation difference value of the hemiplegic side lower limb and the healthy side lower limb of the target user is smaller than a preset balance threshold value. According to the method provided by the invention, the stepped air bag can be dynamically controlled according to the real-time blood circulation state of the individual, the suitability, the real-time performance and the safety of venous thrombosis prevention of the limbs of the paralyzed individual are improved, and the use requirements of different individuals are met.

Description

Technical Field

[0001] This invention relates to the field of medical device control technology, and in particular to a step-by-step balloon control method for preventing venous thrombosis based on infrared detection. Background Technology

[0002] In clinical medicine, stroke, traumatic brain injury, and spinal cord injury often lead to hemiplegia or complete paralysis. Due to prolonged bed rest or loss of limb mobility, these individuals experience significant changes in venous hemodynamics, resulting in slowed blood flow and prominent blood pooling. This not only increases the risk of deep vein thrombosis but can also lead to life-threatening complications such as pulmonary embolism due to thrombus detachment. Therefore, maintaining limb blood circulation and preventing thrombosis in paralyzed individuals has become a core requirement of clinical nursing. In current clinical practice, a crucial direction for the development of thrombosis prevention techniques is to implement targeted interventions based on real-time monitoring of individual limb blood circulation status, adapting to the functional differences of individuals with different types of paralysis.

[0003] To address these needs, two typical solutions have emerged in the existing technology: one is the traditional segmented pneumatic therapy device, which uses multi-chamber airbags on the surface of the limb to perform staged compression from distal to proximal according to a preset fixed pressure and frequency, simulating the muscle pump function of a normal limb to promote venous blood return.

[0004] However, the pressure, frequency, and compression sequence of traditional segmented pneumatic therapy devices are always set based on general clinical standards and cannot be dynamically adjusted according to the individual's real-time blood circulation status. Ultimately, this results in the inability to meet the needs of different individuals in terms of adaptability, real-time performance, and safety in preventing limb thrombosis in paralyzed individuals. Summary of the Invention

[0005] This invention provides a step-by-step airbag control method for preventing venous thrombosis based on infrared detection. It can dynamically control the step-by-step airbag according to the individual's real-time blood circulation status, improving the adaptability, real-time performance, and safety of venous thrombosis prevention for paralyzed individuals, and meeting the needs of different individuals.

[0006] To achieve the above objectives, the embodiments of the present invention adopt the following technical solutions: A first aspect provides a step-type airbag control method for preventing venous thrombosis based on infrared detection. The method includes: acquiring tissue oxygen saturation at at least one monitoring point of a target limb of a target user using a near-infrared sensor, the target limb including the left lower limb, right lower limb, left upper limb, and right upper limb; determining control parameters for the step-type airbag based on the tissue oxygen saturation, the step-type airbag comprising multiple independently controllable airbag units divided along the long axis of the target limb, the control parameters including the compression pressure and compression frequency of each airbag unit; and controlling the operation of the step-type airbag worn on the target limb according to the control parameters, so that the tissue oxygen saturation of the target limb reaches a preset state, the preset state including: when the target user is a hemiplegic individual, the difference in tissue oxygen saturation between the hemiplegic lower limb and the healthy lower limb of the target user is less than a preset balance threshold; and when the target user is a paralyzed individual, the tissue oxygen saturation of both lower limbs of the target user is within a preset tissue oxygen saturation range, and the tissue oxygen saturation of both upper limbs of the target user is within a preset tissue oxygen saturation range.

[0007] The method provided by this invention synchronously acquires the tissue oxygen saturation of the left lower limb, right lower limb, left upper limb, and right upper limb using a near-infrared sensor, enabling effective prevention of thrombosis in each limb. Simultaneously, different preset states are defined based on whether the user is hemiplegic or paralyzed. By reducing the difference in tissue oxygen saturation between the hemiplegic and unaffected lower limbs in hemiplegic individuals and maintaining the tissue oxygen saturation of both upper and lower limbs within the normal range in paralyzed individuals, and determining the control parameters of the stepped airbag based on blood oxygen data, the intervention parameters are directly correlated with the user's specific paralysis type and limb blood oxygen status. This overcomes the shortcomings of existing technologies that use generalized interventions and cannot adapt to the needs of different users, ultimately achieving precise prevention of venous thrombosis in the upper and lower limbs of users with different paralysis types, significantly improving the device's adaptability and the comprehensiveness of thrombosis prevention. In summary, the method provided by this invention can dynamically control the stepped airbag according to the individual's real-time blood circulation status, improving the adaptability, real-time performance, and safety of venous thrombosis prevention in paralyzed individuals, meeting the needs of different individuals.

[0008] In one possible implementation of the first aspect, the monitoring points for the left and right lower limbs include the medial gastrocnemius muscle, the distal quadriceps femoris muscle, and / or the posterior calf muscle group; when the target user is a hemiplegic individual, determining the control parameters of the stepped airbag based on the tissue oxygen saturation includes: determining the tissue oxygen saturation difference between the hemiplegic lower limb and the unaffected lower limb of the target user, wherein the hemiplegic lower limb and the unaffected lower limb are respectively one of the left and right lower limbs; in the tissue oxygen saturation difference When the threshold is greater than or equal to a preset balance threshold, the first control parameters for the stepped airbags worn on the hemiplegic lower limb are generated: the first control parameters are used to control each airbag unit to be squeezed sequentially from the distal end to the proximal end of the limb, wherein the squeezing pressure of the distal airbag unit is 35-45 mmHg, the squeezing pressure of the proximal airbag unit is 25-35 mmHg, the squeezing frequency is 1-3 times / minute, the distal airbag unit is the airbag unit set in the lower leg segment, and the proximal airbag unit is the airbag unit set in the thigh segment.

[0009] The method provided by this invention limits the monitoring points in the lower limbs. Since points such as the medial gastrocnemius muscle and the distal quadriceps femoris muscle are key areas related to venous blood flow in the lower limbs, their blood oxygenation data can accurately reflect the circulatory status of the lower limbs, ensuring the accuracy of tissue oxygen saturation monitoring. Secondly, by calculating the difference in tissue oxygen saturation between the hemiplegic side and the healthy side, potential circulatory problems on the hemiplegic side can be accurately identified. Finally, when the difference exceeds the limit, the first control parameter set for the stepped airbag on the hemiplegic lower limb operates in a sequential compression manner from distal to proximal. This effectively promotes the return of blood stagnant in the hemiplegic lower limb to the heart through higher pressure at the distal end, while avoiding excessive compression of blood vessels through lower pressure at the proximal end. Simultaneously, a reasonable compression frequency can activate muscle pump function while avoiding limb fatigue. The method provided by this invention addresses the circulatory needs of the hemiplegic side in hemiplegic individuals, effectively reducing the difference between the hemiplegic and healthy sides, solving the problem of uneven intervention for the left and right limbs in existing technologies for hemiplegic patients, and improving the targeting and effectiveness of lower limb thrombosis prevention in hemiplegic patients.

[0010] In one possible implementation of the first aspect, when the target user is a paralyzed individual, determining the control parameters of the stepped airbag based on the tissue oxygen saturation includes: if the tissue oxygen saturation at at least one monitoring point of any lower limb is lower than the lower limit of the preset tissue oxygen saturation range, then generating a second control parameter for the stepped airbag worn on the lower limb: the second control parameter is used to control each airbag unit to be squeezed stepwise from the distal end to the proximal end, with a squeezing pressure gradient of 5-10 mmHg and a squeezing frequency of 2-3 times / minute; if the tissue oxygen saturation of both lower limbs is within the preset tissue oxygen saturation range, then generating a third control parameter: the third control parameter is used to control the airbag units corresponding to both lower limbs to operate with a squeezing pressure of 15-25 mmHg and a squeezing frequency of 1-2 times / minute.

[0011] The method provided by this invention sets different control parameters for different scenarios. When the blood oxygen saturation of any lower limb is below the lower limit of the normal range, a second control parameter is used to simulate the muscle pump action under physiological conditions through a stepwise compression from distal to proximal, gradually promoting blood return. This ensures that the intervention intensity is sufficient to improve the problem of low blood oxygenation while avoiding the impact on blood vessels from a sudden increase in pressure. When the blood oxygen saturation of both lower limbs is within the normal range, the device does not stop working but maintains low-intensity operation through a third control parameter. This maintains the basic blood flow velocity of the lower limb veins through continuous, gentle compression, preventing blood stasis, while avoiding the risk of tissue damage caused by high-intensity intervention. The method provided by this invention can achieve dynamic adaptation for lower limb thrombosis prevention in paralyzed individuals, balancing the effectiveness and safety of the intervention.

[0012] In one possible implementation of the first aspect, the monitoring points of the left and right upper limbs include the medial side of the biceps brachii, the forearm flexor muscles, and / or the posterior upper arm muscles; when the target user is a paralyzed individual, the step of determining the control parameters of the stepped airbag based on the tissue oxygen saturation further includes: if the tissue oxygen saturation of at least one monitoring point of any upper limb is lower than the lower limit of the preset tissue oxygen saturation range, then a fourth control parameter is generated for the stepped airbag worn on the upper limb: the fourth control parameter is used to control each airbag unit to be squeezed sequentially from the distal end to the proximal end of the limb, wherein the squeezing pressure of the distal airbag unit is 30-40 mmHg, the squeezing pressure of the proximal airbag unit is 20-30 mmHg, the squeezing frequency is 1-3 times / minute, the distal airbag unit is an airbag unit set in the forearm segment, and the proximal airbag unit is an airbag unit set in the upper arm segment. If the tissue oxygen saturation of both upper limbs is within the preset tissue oxygen saturation range, a fifth control parameter is generated: the fifth control parameter is used to control the airbag unit corresponding to both upper limbs to work with a compression pressure of 15-25 mmHg and a compression frequency of 1-2 times / minute.

[0013] The method provided by this invention defines upper limb monitoring points that are highly correlated with the upper limb venous return pathway. These points provide accurate blood oxygenation data reflecting the upper limb circulatory status, filling a monitoring blind spot in upper limb thrombosis prevention. Secondly, different control parameters are set for different scenarios. When the blood oxygenation of any upper limb is below the lower limit of the normal range, a specific fourth control parameter is set for the upper limb stepped airbag, which promotes blood return and improves circulation. When the blood oxygenation of both upper limbs is normal, a fifth control parameter maintains low-intensity operation to prevent blood pooling. The method provided by this invention enables coordinated prevention of upper and lower limb thrombosis, while ensuring the precision of upper limb intervention through differentiated parameters. This addresses the gap in existing technologies for upper limb thrombosis prevention and reduces the overall risk of systemic venous thrombosis in paralyzed patients.

[0014] In one possible implementation of the first aspect, controlling the operation of the stepped airbag worn on the target limb according to the control parameters includes: first controlling the most distal airbag unit to inflate and compress along the direction of venous return of the target limb; after the most distal airbag unit maintains the compressed state for 5-10 seconds, sequentially controlling the adjacent proximal airbag units to inflate and compress, with the time interval between the deflation of the previous airbag unit and the inflation of the next airbag unit being 1-3 seconds, and the deflation time of each airbag unit being 15-40 seconds.

[0015] The method provided by this invention controls the operation of the airbags along the venous return direction of the target limb. First, the most distal airbag unit is activated and maintained for 5-10 seconds. This duration is sufficient to fully push distal blood towards the proximal end, avoiding insufficient blood propulsion due to insufficient compression time. Subsequently, adjacent proximal airbag units are inflated sequentially, with an interval of 1-3 seconds between the deflation of one unit and the inflation of the next. This interval ensures that blood from the previous unit is fully pushed towards the proximal end before activating the next unit, preventing blood stagnation between units and preventing interruption of return flow due to slow transitions between units. This distal-priority, sequential, and precisely timed operation simulates the muscle pump function during normal human activity, ensuring unidirectional blood flow along the venous return direction. It completely solves the problems of poor return effect and blood reflux caused by improper compression sequence in existing technologies, significantly improving the efficiency of the stepped airbag in promoting blood return, thereby enhancing the thrombosis prevention effect.

[0016] In one possible implementation of the first aspect, the method further includes: acquiring pressure distribution data at the contact points between the stepped airbags worn by the target user's upper and lower limbs and the skin using a flexible pressure sensor; and reducing the compression pressure of the corresponding airbag unit when any pressure value in the pressure distribution data is greater than a preset pressure threshold, so that any pressure value is less than or equal to the preset pressure threshold.

[0017] The method provided by this invention acquires pressure distribution data at the contact point between the airbag and the skin in real time using a flexible pressure sensor, enabling precise detection of pressure anomalies at any location. When any pressure value exceeds a preset pressure threshold, the compression pressure of the corresponding airbag unit is immediately reduced, ensuring that the pressure is always controlled within a safe range. This method overcomes the risk of localized overpressure caused by the lack of pressure feedback in existing technologies, effectively protecting the patient's limb skin and tissues, significantly improving the safety of the device, and is particularly suitable for paralyzed or hemiplegic patients with reduced sensory perception.

[0018] In one possible implementation of the first aspect, the method further includes: determining the tissue oxygen balance index of each target limb of the target user; and generating an alarm message when the tissue oxygen balance index of any target limb of the target user is greater than a preset alarm threshold and the duration exceeds a preset alarm duration. The formula for determining the tissue oxygen balance index R of the target limb is as follows: R = |S1-S0| / S0; Wherein, S1 is the current tissue oxygen saturation of the target limb, and S0 is the preset baseline tissue oxygen saturation of the target limb.

[0019] The method provided by this invention calculates a tissue oxygen balance index, which accurately quantifies the deviation of current blood oxygen from the normal state, avoiding the one-sidedness of relying solely on real-time blood oxygen values. Simultaneously, by setting an alarm trigger condition where the index exceeds a preset alarm threshold and persists for a preset alarm duration, false alarms caused by instantaneous fluctuations in blood oxygen can be eliminated, and alarm information can be generated promptly when blood oxygen imbalance persists, reminding medical staff to check the patient's limb status and adjust intervention strategies. The method provided by this invention enables quantitative assessment and delayed alarm of limb blood oxygen status, solving the problem that existing technologies cannot promptly identify persistent blood oxygen imbalances, thus gaining time for early intervention in thrombosis risk and reducing the probability of thrombosis formation due to delayed intervention.

[0020] In one possible implementation of the first aspect, each airbag unit of the stepped airbag is provided with an independent pressure feedback unit, which is used to: collect the actual compression pressure of the corresponding airbag unit in real time; compare the actual compression pressure with the compression pressure in the control parameters; if the difference between the actual compression pressure and the compression pressure in the control parameters is greater than the pressure difference threshold, adjust the inflation volume of the airbag unit so that the difference between the actual compression pressure and the compression pressure in the control parameters is less than or equal to the pressure difference threshold.

[0021] The method provided by this invention sets up an independent pressure feedback unit for each airbag unit. By collecting the actual compression pressure in real time and comparing it with preset parameters, it can accurately identify the pressure deviation of a single unit. When the deviation exceeds a pressure difference threshold, the inflation volume is adjusted to bring the actual pressure closer to the preset value, ensuring that each airbag unit can operate stably according to the set parameters. The method provided by this invention can achieve precise closed-loop control of airbag unit pressure, solving the problem of unstable intervention effect caused by pressure deviation in existing technologies, ensuring that each limb area receives an appropriate intervention intensity, and thus ensuring the stability and reliability of the overall thrombosis prevention effect.

[0022] Secondly, the present invention provides a stepped airbag control system for preventing venous thrombosis based on infrared detection. The system includes: a data acquisition module for acquiring tissue oxygen saturation at at least one monitoring point of a target limb of a target user via a near-infrared sensor, the target limb including the left lower limb, right lower limb, left upper limb, and right upper limb; and a parameter determination module for determining control parameters of the stepped airbag based on the tissue oxygen saturation, the stepped airbag comprising multiple independently controllable airbag units divided along the long axis of the target limb, the control parameters including the compression pressure of each airbag unit. The control module includes a compression frequency and an airbag control module, which controls the operation of the stepped airbag worn on the target limb according to the control parameters, so that the tissue oxygen saturation of the target limb reaches a preset state. The preset state includes: when the target user is a hemiplegic individual, the difference in tissue oxygen saturation between the hemiplegic lower limb and the healthy lower limb of the target user is less than a preset balance threshold; and when the target user is a paralyzed individual, the tissue oxygen saturation of both lower limbs of the target user is within a preset tissue oxygen saturation range, and the tissue oxygen saturation of both upper limbs of the target user is within a preset tissue oxygen saturation range.

[0023] Thirdly, an electronic device is provided, the electronic device including a memory and one or more processors; the memory is coupled to the processors; wherein the memory stores computer program code, the computer program code including computer instructions, which, when executed by the processor, cause the electronic device to perform the method as described in any implementation of the first aspect.

[0024] Fourthly, a computer-readable storage medium is provided, including computer instructions that, when executed on an electronic device, cause the electronic device to perform a method as described in any implementation of the first aspect.

[0025] Fifthly, a computer program product is provided that, when run on a computer, causes the computer to perform the method in any implementation of the first aspect.

[0026] Understandably, the beneficial effects achieved by the system of the second aspect, the electronic device of the third aspect, the computer-readable storage medium of the fourth aspect, and the computer program product of the fifth aspect provided above can be referred to with reference to the beneficial effects of the first aspect and any of its possible design embodiments, which will not be repeated here. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of an electronic device provided in an embodiment of the present invention; Figure 2 A flowchart of a step-by-step balloon control method for preventing venous thrombosis based on infrared detection, provided as an embodiment of the present invention; Figure 3 A flowchart of another step-by-step balloon control method for preventing venous thrombosis based on infrared detection provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of a control system provided in an embodiment of the present invention. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be described below with reference to the accompanying drawings. In the description of the present invention, unless otherwise stated, " / " indicates that the objects before and after are in an "or" relationship. For example, A / B can represent A or B. The "or" in the present invention is merely a description of the relationship between the related objects, indicating that three relationships can exist. For example, A or B can represent: A alone, A and B simultaneously, and B alone. A and B can be singular or plural. Furthermore, in the description of the present invention, unless otherwise stated, "multiple" refers to two or more. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items.

[0029] Furthermore, to facilitate a clear description of the technical solutions of the embodiments of the present invention, the terms "first" and "second" are used in the embodiments of the present invention to distinguish identical or similar items with essentially the same function and effect. Those skilled in the art will understand that the terms "first" and "second" do not limit the quantity or execution order, and that the terms "first" and "second" are not necessarily different.

[0030] In this embodiment of the invention, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design described as "exemplary" or "for example" in this embodiment of the invention should not be construed as superior or more advantageous than other embodiments or designs. Specifically, the use of terms such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner for ease of understanding.

[0031] In clinical medicine, stroke, traumatic brain injury, and spinal cord injury often lead to hemiplegia or complete paralysis. Due to prolonged bed rest or loss of limb mobility, these individuals experience significant changes in venous hemodynamics, resulting in slowed blood flow and prominent blood pooling. This not only increases the risk of deep vein thrombosis but can also lead to life-threatening complications such as pulmonary embolism due to thrombus detachment. Therefore, maintaining limb blood circulation and preventing thrombosis in paralyzed individuals has become a core requirement of clinical nursing. In current clinical practice, a crucial direction for the development of thrombosis prevention techniques is to implement targeted interventions based on real-time monitoring of individual limb blood circulation status, adapting to the functional differences of individuals with different types of paralysis.

[0032] To address these needs, two typical solutions have emerged in the existing technology: one is the traditional segmented pneumatic therapy device, which uses multi-chamber airbags on the surface of the limb to perform staged compression from distal to proximal according to a preset fixed pressure and frequency, simulating the muscle pump function of a normal limb to promote venous blood return.

[0033] However, traditional segmented pneumatic compression therapy devices always set the pressure, frequency, and compression sequence based on general clinical standards, and cannot be dynamically adjusted according to the individual's real-time blood circulation status. Ultimately, this results in the device failing to meet the user's needs in terms of adaptability, real-time performance, and safety for limb thrombosis prevention in paralyzed individuals. In view of this, embodiments of the present invention provide a stepped airbag control method for preventing venous thrombosis based on infrared detection. The method comprises: acquiring tissue oxygen saturation at at least one monitoring point of a target limb of a target user using a near-infrared sensor, wherein the target limb includes the left lower limb, right lower limb, left upper limb, and right upper limb; determining control parameters of the stepped airbag based on the tissue oxygen saturation, wherein the stepped airbag comprises multiple independently controllable airbag units divided along the long axis of the target limb, and the control parameters include the compression pressure of each airbag unit and... Compression frequency; controlling the operation of the stepped airbag worn on the target limb according to the control parameters, so that the tissue oxygen saturation of the target limb reaches a preset state, the preset state including: when the target user is a hemiplegic individual, the difference in tissue oxygen saturation between the hemiplegic lower limb and the healthy lower limb of the target user is less than a preset balance threshold; and when the target user is a paralyzed individual, the tissue oxygen saturation of both lower limbs of the target user is within a preset tissue oxygen saturation range, and the tissue oxygen saturation of both upper limbs of the target user is within a preset tissue oxygen saturation range.

[0034] The method provided by this invention synchronously acquires the tissue oxygen saturation of the left lower limb, right lower limb, left upper limb, and right upper limb using a near-infrared sensor, enabling effective prevention of thrombosis in each limb. Simultaneously, different preset states are defined based on whether the user is hemiplegic or paralyzed. By reducing the difference in tissue oxygen saturation between the hemiplegic and unaffected lower limbs in hemiplegic individuals and maintaining the tissue oxygen saturation of both upper and lower limbs within the normal range in paralyzed individuals, and determining the control parameters of the stepped airbag based on blood oxygen data, the intervention parameters are directly correlated with the user's specific paralysis type and limb blood oxygen status. This overcomes the shortcomings of existing technologies that use generalized interventions and cannot adapt to the needs of different users, ultimately achieving precise prevention of venous thrombosis in the upper and lower limbs of users with different paralysis types, significantly improving the device's adaptability and the comprehensiveness of thrombosis prevention. In summary, the method provided by this invention can dynamically control the stepped airbag according to the individual's real-time blood circulation status, improving the adaptability, real-time performance, and safety of venous thrombosis prevention in paralyzed individuals, meeting the needs of different individuals.

[0035] In some embodiments, the step-by-step airbag control method for preventing venous thrombosis based on infrared detection provided in this invention can be executed by a step-by-step airbag control system 100 for preventing venous thrombosis based on infrared detection (hereinafter referred to as control system 100).

[0036] As an example, the control system 100 can be any electronic device 200 with data processing capabilities, such as a general-purpose computer, personal computer, laptop computer, switch, or tablet computer. The specific implementation of the control system 100 is not limited here.

[0037] Figure 1 A schematic diagram of the hardware structure of an electronic device provided in an embodiment of the present invention is shown. The electronic device 200 includes a processor 210, a memory 220, and a communication interface 230.

[0038] Processor 210 may include one or more processing cores. Processor 210 connects to various parts within electronic device 200 using various interfaces and lines, and performs various functions and processes data of electronic device 200 by running or executing instructions, programs, code sets, or instruction sets stored in memory 220, and by calling data stored in memory 220. Optionally, processor 210 may be implemented using at least one of the following hardware forms: Central Processing Unit (CPU), Graphics Processing Unit (GPU), Digital Signal Processing (DSP), Field-Programmable Gate Array (FPGA), and Programmable Logic Array (PLA).

[0039] The memory 220 may include random access memory (RAI) or read-only memory (ROI). Optionally, the memory 220 may include non-transitory computer-readable storage ledger. The memory 220 may be used to store instructions, programs, code, code sets, or instruction sets. The memory 220 may include a stored program area. The stored program area may store instructions for implementing an operating system, instructions for implementing at least one function (such as data acquisition functions, parameter determination functions, and airbag control functions), and instructions for implementing the various method embodiments described above.

[0040] Communication interface 230 is used to communicate with other devices, equipment or communication networks, such as data storage devices, image processing devices or Ethernet, wireless access network (RAN), wireless local area network (WLAN), etc.

[0041] In terms of physical implementation, the aforementioned devices (such as processor 210, memory 220, and communication interface 230) can each be devices within the same device (such as a laptop computer). Alternatively, at least two of these devices can be located within the same device, i.e., as different devices within the same device, similar to the deployment of devices or components in a distributed system.

[0042] It is understood that the structure illustrated in this embodiment does not constitute a specific limitation on the electronic device 200. In other embodiments of the present invention, the electronic device 200 may include more or fewer components than illustrated, or combine some components, or split some components, or have different component arrangements. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

[0043] The following description, in conjunction with the accompanying drawings, illustrates a step-by-step balloon control method for preventing venous thrombosis based on infrared detection, provided by an embodiment of the present invention.

[0044] Figure 2 This is a flowchart illustrating a stepped balloon control method for preventing venous thrombosis based on infrared detection, provided as an embodiment of the present invention. Optionally, this method can be... Figure 1 The illustrated electronic device 200 performs this operation. The method may include the following steps: S1. Obtain the tissue oxygen saturation of at least one monitoring point of the target limb of the target user through a near-infrared sensor, wherein the target limb includes the left lower limb, right lower limb, left upper limb, and right upper limb.

[0045] In some embodiments, the monitoring points for the left and right lower limbs include the medial side of the gastrocnemius muscle, the distal end of the quadriceps femoris muscle, and / or the posterior calf muscle group; the monitoring points for the left and right upper limbs include the medial side of the biceps brachii muscle, the forearm flexor muscle group, and / or the posterior upper arm muscle group. The method provided by this invention defines monitoring points in the lower limbs. Since these points, such as the medial gastrocnemius muscle and the distal quadriceps femoris muscle, are key areas related to venous blood flow in the lower limbs, their blood oxygenation data can accurately reflect the circulatory status of the lower limbs, ensuring the accuracy of tissue oxygen saturation monitoring. On the other hand, the method provided by this invention defines monitoring points in the upper limbs. These monitoring points are highly correlated with the venous return pathway of the upper limbs, and their blood oxygenation data can accurately reflect the circulatory status of the upper limbs, filling the monitoring blind spot in upper limb thrombosis prevention.

[0046] S2. Determine the control parameters of the stepped airbag based on the tissue oxygen saturation.

[0047] Specifically, the stepped airbag includes multiple independently controllable airbag units divided along the long axis of the target limb, and the control parameters include the compression pressure and compression frequency of each airbag unit.

[0048] It should be noted that the stepped airbag is a medical device used to assist venous return. Its structure mainly consists of multiple independent airbag units arranged along the long axis of the limb, such as airbags for the lower leg, thigh, forearm, or upper arm. Each unit is connected to a pressure control system via flexible tubing and adopts a segmented design to ensure precise coverage of key hemodynamic areas such as the gastrocnemius muscle in the lower limb, the femoral vein, or the brachial vein in the upper limb. Its working principle is as follows: through a gradient sequential compression from distal to proximal (such as ankle-lower leg-thigh), a step pressure difference of 5-10 mmHg is formed during inflation, simulating the "milking effect" of the human muscle pump. That is, the high pressure at the distal end pushes away stagnant blood, while the low pressure at the proximal end continues to guide blood flow. With the control of the inflation and deflation sequence, the venous valves open unidirectionally, ultimately achieving directional blood flow back to the heart, thereby preventing deep vein thrombosis.

[0049] In one possible implementation, see Figure 3 When the target user is a hemiplegic individual, the above S2 includes: S21. Determine the difference in tissue oxygen saturation between the hemiplegic lower limb and the healthy lower limb of the target user, wherein the hemiplegic lower limb and the healthy lower limb are one of the left lower limb and the right lower limb, respectively.

[0050] Specifically, the hemiplegic lower limb and the healthy lower limb refer to the corresponding side of the left and right lower limbs.

[0051] S22. When the tissue oxygen saturation difference is greater than or equal to a preset balance threshold, generate the first control parameters for the stepped airbag worn on the hemiplegic lower limb.

[0052] The first control parameter is used to control each airbag unit to compress sequentially from the distal end to the proximal end of the limb, wherein the compression pressure of the distal airbag unit is 35-45 mmHg, the compression pressure of the proximal airbag unit is 25-35 mmHg, and the compression frequency is 1-3 times / minute.

[0053] It should be noted that the distal airbag unit is the airbag unit installed in the lower leg, and the proximal airbag unit is the airbag unit installed in the thigh. Alternatively, it can be understood as: the distal airbag unit is the airbag unit installed in the lower leg, and the proximal airbag unit is the airbag unit installed in the thigh. For example, the distal airbag unit includes two independent airbags on the front and back of the lower leg, while the proximal airbag unit includes two independent airbags on the inner and outer sides of the thigh.

[0054] In one example, the preset balance threshold is 5%-10%.

[0055] The method provided by this invention can accurately identify circulatory risks on the hemiplegic side by calculating the difference in tissue oxygen saturation between the hemiplegic and healthy sides. Finally, when the difference exceeds the limit, a first control parameter is set for the stepped airbags on the hemiplegic lower limb, operating in a sequential compression manner from distal to proximal. This effectively promotes the return of blood stagnant in the hemiplegic lower limb to the heart through higher pressure at the distal end, while avoiding excessive compression of blood vessels through lower pressure at the proximal end. Simultaneously, a reasonable compression frequency can activate muscle pump function while preventing limb fatigue. The method provided by this invention addresses the circulatory needs of the hemiplegic side in individuals with hemiplegia, effectively reducing the difference between the hemiplegic and healthy sides, solving the problem of uneven intervention for the left and right limbs in existing technologies for hemiplegic patients, and improving the targeting and effectiveness of lower limb thrombosis prevention in hemiplegic patients.

[0056] In another possible implementation, when the target user is a paralyzed individual, the above S2 includes: If the tissue oxygen saturation at at least one monitoring point of any lower limb is lower than the preset tissue oxygen saturation range lower limit, a second control parameter is generated for the stepped airbag worn on the lower limb: the second control parameter is used to control each airbag unit to squeeze from the distal end to the proximal end in a stepped manner, with a squeezing pressure gradient of 5-10 mmHg and a squeezing frequency of 2-3 times / minute; if the tissue oxygen saturation of both lower limbs is within the preset tissue oxygen saturation range, a third control parameter is generated: the third control parameter is used to control the airbag units corresponding to both lower limbs to work with a squeezing pressure of 15-25 mmHg and a squeezing frequency of 1-2 times / minute.

[0057] It should be noted that the gradient direction is consistent with the venous return direction.

[0058] In one example, the preset tissue oxygen saturation range for the lower extremities is 60%-80%.

[0059] The method provided by this invention sets different control parameters for different scenarios. When the blood oxygen saturation of any lower limb is below the lower limit of the normal range, a second control parameter is used to simulate the muscle pump action under physiological conditions through a stepwise compression from distal to proximal, gradually promoting blood return. This ensures that the intervention intensity is sufficient to improve the problem of low blood oxygenation while avoiding the impact on blood vessels from a sudden increase in pressure. When the blood oxygen saturation of both lower limbs is within the normal range, the device does not stop working but maintains low-intensity operation through a third control parameter. This maintains the basic blood flow velocity of the lower limb veins through continuous, gentle compression, preventing blood stasis, while avoiding the risk of tissue damage caused by high-intensity intervention. The method provided by this invention can achieve dynamic adaptation for lower limb thrombosis prevention in paralyzed individuals, balancing the effectiveness and safety of the intervention.

[0060] In another possible implementation, when the target user is a paralyzed individual, the above S2 includes: If the tissue oxygen saturation at at least one monitoring point on any upper limb is lower than the preset tissue oxygen saturation range lower limit, a fourth control parameter is generated for the stepped airbag worn on the upper limb: the fourth control parameter is used to control each airbag unit to be squeezed sequentially from the distal end to the proximal end of the limb, wherein the squeezing pressure of the distal airbag unit is 30-40 mmHg, the squeezing pressure of the proximal airbag unit is 20-30 mmHg, the squeezing frequency is 1-3 times / minute, the distal airbag unit is the airbag unit set in the forearm segment, and the proximal airbag unit is the airbag unit set in the upper arm segment.

[0061] It should be understood that the distal airbag unit is the airbag unit located in the forearm segment, and the proximal airbag unit is the airbag unit located in the upper arm segment. In one example, the forearm segment airbag unit covers the forearm flexor and extensor muscles, while the upper arm segment airbag unit covers the biceps and triceps brachii muscles.

[0062] If the tissue oxygen saturation of both upper limbs is within the preset tissue oxygen saturation range, a fifth control parameter is generated: the fifth control parameter is used to control the airbag unit corresponding to both upper limbs to work with a compression pressure of 15-25 mmHg and a compression frequency of 1-2 times / minute.

[0063] In one example, the preset tissue oxygen saturation range for the upper limb is 55%-75%.

[0064] The method provided by this invention sets a specific fourth control parameter for the upper limb stepped airbag when the blood oxygen saturation of either upper limb is below the lower limit of the normal range. This fourth control parameter promotes blood return in the upper limb, improving circulation. When the blood oxygen saturation of both upper limbs is normal, a fifth control parameter maintains low-intensity operation to prevent blood stasis. The method provided by this invention can achieve coordinated prevention of upper and lower limb thrombosis, while ensuring the precision of upper limb intervention through differentiated parameters. This addresses the gap in existing technologies for upper limb thrombosis prevention and reduces the overall risk of systemic venous thrombosis in paralyzed patients.

[0065] S3. Control the operation of the stepped airbag worn on the target limb according to the control parameters so that the tissue oxygen saturation of the target limb reaches a preset state.

[0066] Specifically, the preset states include: when the target user is a hemiplegic individual, the difference in tissue oxygen saturation between the hemiplegic lower limb and the healthy lower limb of the target user is less than a preset balance threshold; and when the target user is a paralyzed individual, the tissue oxygen saturation of both lower limbs of the target user is within a preset tissue oxygen saturation range, and the tissue oxygen saturation of both upper limbs of the target user is within a preset tissue oxygen saturation range.

[0067] In some embodiments, controlling the operation of the stepped airbag worn on the target limb according to the control parameters includes: Along the direction of venous return in the target limb, first control the inflation and compression of the most distal airbag unit; after the most distal airbag unit is maintained in a compressed state for 5-10 seconds, control the inflation and compression of the adjacent proximal airbag units in sequence, with the time interval between the deflation of the previous airbag unit and the inflation of the next airbag unit being 1-3 seconds, and the deflation time of each airbag unit being 15-40 seconds.

[0068] In this configuration, the first airbag unit is adjacent to the second airbag unit, with the first airbag unit located distally along the direction of venous return and the second airbag unit located proximally along the direction of venous return.

[0069] The method provided by this invention controls the operation of the airbags along the venous return direction of the target limb. First, the most distal airbag unit is activated and maintained for 5-10 seconds. This duration is sufficient to fully push distal blood towards the proximal end, avoiding insufficient blood propulsion due to insufficient compression time. Subsequently, adjacent proximal airbag units are inflated sequentially, with an interval of 1-3 seconds between the deflation of one unit and the inflation of the next. This interval ensures that blood from the previous unit is fully pushed towards the proximal end before activating the next unit, preventing blood stagnation between units and preventing interruption of return flow due to slow transitions between units. This distal-priority, sequential, and precisely timed operation simulates the muscle pump function during normal human activity, ensuring unidirectional blood flow along the venous return direction. It completely solves the problems of poor return effect and blood reflux caused by improper compression sequence in existing technologies, significantly improving the efficiency of the stepped airbag in promoting blood return, thereby enhancing the thrombosis prevention effect.

[0070] As described in S1-S3 above, the method provided by this invention synchronously acquires the tissue oxygen saturation of the left lower limb, right lower limb, left upper limb, and right upper limb using a near-infrared sensor, enabling effective prevention of thrombosis in each limb. Simultaneously, different preset states are defined based on whether the user is hemiplegic or paralyzed. By reducing the difference in tissue oxygen saturation between the hemiplegic and healthy lower limbs in hemiplegic individuals and maintaining the tissue oxygen saturation of both upper and lower limbs in paralyzed individuals within the normal range, and determining the control parameters of the stepped airbag based on blood oxygen data, the intervention parameters are directly correlated with the user's specific paralysis type and limb blood oxygen status. This addresses the shortcomings of existing technologies where universal interventions cannot adapt to different user needs, ultimately achieving precise prevention of venous thrombosis in the upper and lower limbs of users with different paralysis types, significantly improving the device's adaptability and the comprehensiveness of thrombosis prevention. In summary, the method provided by this invention can dynamically control the stepped airbag according to the individual's real-time blood circulation status, improving the adaptability, real-time performance, and safety of venous thrombosis prevention in paralyzed individuals, meeting the usage needs of different individuals.

[0071] In some embodiments, the method provided by the present invention further includes: The pressure distribution data at the contact points between the stepped airbags worn by the target user on the upper and lower limbs and the skin are obtained by a flexible pressure sensor; if any pressure value in the pressure distribution data is greater than a preset pressure threshold, the compression pressure of the corresponding airbag unit is reduced so that any pressure value is less than or equal to the preset pressure threshold.

[0072] For example, the preset pressure threshold is 100 mmHg.

[0073] The method provided by this invention acquires pressure distribution data at the contact point between the airbag and the skin in real time using a flexible pressure sensor, enabling precise detection of pressure anomalies at any location. When any pressure value exceeds a preset pressure threshold, the compression pressure of the corresponding airbag unit is immediately reduced, ensuring that the pressure is always controlled within a safe range. This method overcomes the risk of localized overpressure caused by the lack of pressure feedback in existing technologies, effectively protecting the patient's limb skin and tissues, significantly improving the safety of the device, and is particularly suitable for paralyzed or hemiplegic patients with reduced sensory perception.

[0074] In another embodiment, the method further includes: Determine the tissue oxygen balance index of each target limb of the target user; An alarm message is generated when the tissue oxygen balance index of any target limb of the target user is greater than a preset alarm threshold and the duration exceeds a preset alarm duration. The formula for determining the tissue oxygen balance index R of the target limb is as follows: R = |S1-S0| / S0; Wherein, S1 is the current tissue oxygen saturation of the target limb, and S0 is the preset baseline tissue oxygen saturation of the target limb.

[0075] It should be noted that the preset baseline tissue oxygen saturation is the base value of the target user under healthy conditions or the standard value of the same age group. The embodiments of the present invention do not impose any special restrictions on the implementation method of the preset baseline tissue oxygen saturation.

[0076] In one example, the preset alarm threshold is 0.2 and the preset alarm duration is 5 minutes.

[0077] The method provided by this invention calculates a tissue oxygen balance index, which accurately quantifies the deviation of current blood oxygen from the normal state, avoiding the one-sidedness of relying solely on real-time blood oxygen values. Simultaneously, by setting an alarm trigger condition where the index exceeds a preset alarm threshold and persists for a preset alarm duration, false alarms caused by instantaneous fluctuations in blood oxygen can be eliminated, and alarm information can be generated promptly when blood oxygen imbalance persists, reminding medical staff to check the patient's limb status and adjust intervention strategies. The method provided by this invention enables quantitative assessment and delayed alarm of limb blood oxygen status, solving the problem that existing technologies cannot promptly identify persistent blood oxygen imbalances, thus gaining time for early intervention in thrombosis risk and reducing the probability of thrombosis formation due to delayed intervention.

[0078] In one possible implementation, each airbag unit of the stepped airbag is equipped with an independent pressure feedback unit, which is used to: collect the actual compression pressure of the corresponding airbag unit in real time; compare the actual compression pressure with the compression pressure in the control parameters; if the difference between the actual compression pressure and the compression pressure in the control parameters is greater than the pressure difference threshold, adjust the inflation volume of the airbag unit so that the difference between the actual compression pressure and the compression pressure in the control parameters is less than or equal to the pressure difference threshold.

[0079] For example, the pressure difference threshold is 5 mmHg.

[0080] The method provided by this invention sets up an independent pressure feedback unit for each airbag unit. By collecting the actual compression pressure in real time and comparing it with preset parameters, it can accurately identify the pressure deviation of a single unit. When the deviation exceeds a pressure difference threshold, the inflation volume is adjusted to bring the actual pressure closer to the preset value, ensuring that each airbag unit can operate stably according to the set parameters. The method provided by this invention can achieve precise closed-loop control of airbag unit pressure, solving the problem of unstable intervention effect caused by pressure deviation in existing technologies, ensuring that each limb area receives an appropriate intervention intensity, and thus ensuring the stability and reliability of the overall thrombosis prevention effect.

[0081] Optionally, the method provided in this embodiment of the invention further includes: The blood flow velocity at the monitoring points on the lower limbs of the target user is simultaneously acquired using a near-infrared sensor; When the target user is a hemiplegic individual, the first control parameters for generating the stepped airbag worn on the hemiplegic lower limb include: When the target user's blood flow velocity is greater than a first blood flow threshold, the first control parameters are determined to be: a distal airbag unit compression pressure of 35-45 mmHg, a proximal airbag unit compression pressure of 25-35 mmHg, and a compression frequency of 15-25 times / minute; when the target user's blood flow velocity is less than or equal to the first blood flow threshold but greater than a second blood flow threshold, the first control parameters are determined to be: a distal airbag unit compression pressure of 40-50 mmHg, a proximal airbag unit compression pressure of 30-40 mmHg, and a compression frequency of 25-35 times / minute; when the target user's blood flow velocity is less than or equal to the second blood flow threshold, the first control parameters are determined to be: a distal airbag unit compression pressure of 45-55 mmHg, a proximal airbag unit compression pressure of 45-55 mmHg, and a compression frequency of 35-45 times / minute.

[0082] For example, the first blood flow threshold is 15 cm / s, and the second blood flow threshold is 8 cm / s.

[0083] It should be understood that when blood flow is fast, using high squeezing pressure and frequency can easily cause excessive stimulation of blood vessels; when blood flow is slow, insufficient squeezing intensity is difficult to effectively promote blood return and cannot adequately improve the circulatory status of the hemiplegic side. The method provided in this invention synchronously acquires the blood flow velocity at monitoring points in the lower limb of a hemiplegic individual using a near-infrared sensor, dividing the blood flow velocity into three intervals and matching differentiated first control parameters to each: when the blood flow velocity is fast, lower squeezing pressure and frequency are used to avoid excessive intervention and damage to blood vessels; when the blood flow velocity is moderate, pressure and frequency are moderately increased to ensure both intervention effectiveness and safety; when the blood flow velocity is extremely slow, pressure and frequency are further increased to break up blood stasis through stronger squeezing action. In this way, the method provided by this invention can provide sufficient intervention to promote return when blood flow is slow, and can reduce intensity to protect blood vessels when blood flow is fast, ultimately improving the accuracy and safety of thrombosis prevention in the lower limb of the hemiplegic individual.

[0084] The foregoing mainly describes the solutions of the embodiments of the present invention from a methodological perspective. It is understood that, in order to achieve the above-mentioned functions, the control system 100 includes at least one of the hardware structures and software modules corresponding to the execution of each function. Those skilled in the art should readily recognize that, in conjunction with the units and algorithm steps of the various examples described in the embodiments disclosed herein, the embodiments of the present invention can be implemented in hardware or a combination of hardware and computer software. Whether a function is executed by hardware or by computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the embodiments of the present invention.

[0085] In this embodiment of the invention, the control system 100 can be divided into functional units according to the above method example. For example, the control system 100 can be divided into functional units corresponding to various functions, or two or more functions can be integrated into one processing unit. The integrated unit can be implemented in hardware or as a software functional unit. It should be noted that the unit division in this embodiment of the invention is illustrative and only represents one logical functional division; other division methods may be used in actual implementation.

[0086] For example, Figure 4 A schematic diagram of the hardware structure of a control system provided in an embodiment of the present invention is shown. The control system 100 includes: a data acquisition module 110, used to acquire tissue oxygen saturation at at least one monitoring point of a target limb of a target user via a near-infrared sensor, the target limb including the left lower limb, right lower limb, left upper limb, and right upper limb; a parameter determination module 120, used to determine control parameters of the stepped airbag based on the tissue oxygen saturation, the stepped airbag including multiple independently controllable airbag units divided along the long axis of the target limb, the control parameters including the compression pressure and compression frequency of each airbag unit; and an airbag control module 130. The system is used to control the operation of the stepped airbag worn on the target limb according to the control parameters, so that the tissue oxygen saturation of the target limb reaches a preset state. The preset state includes: when the target user is a hemiplegic individual, the difference in tissue oxygen saturation between the hemiplegic lower limb and the healthy lower limb of the target user is less than a preset balance threshold; and when the target user is a paralyzed individual, the tissue oxygen saturation of both lower limbs of the target user is within a preset tissue oxygen saturation range, and the tissue oxygen saturation of both upper limbs of the target user is within a preset tissue oxygen saturation range.

[0087] It should be understood that specific descriptions of the above-mentioned optional methods can be found in the foregoing method embodiments, and will not be repeated here. Furthermore, explanations of any of the control systems 100 provided above, as well as descriptions of their beneficial effects, can be found in the corresponding method embodiments described above, and will not be repeated here.

[0088] This invention also provides a computer-readable storage medium storing at least one computer instruction, which is loaded and executed by a processor to implement the methods of the various embodiments described above. Explanations of the relevant content and descriptions of the beneficial effects of any of the computer-readable storage media provided above can be found in the corresponding embodiments described above, and will not be repeated here.

[0089] This invention also provides a chip. This chip integrates a control circuit for implementing the functions of the control system 100 described above, and one or more ports. Optionally, the functions supported by this chip are as described above, and will not be repeated here.

[0090] Those skilled in the art will understand that the program for implementing all or part of the steps of the above embodiments, which can be executed by a program instructing related hardware, can be stored in a computer-readable storage medium. The storage medium mentioned above can be a read-only memory, a random access memory, etc. The processing unit or processor mentioned above can be a central processing unit, a general-purpose processor, an application-specific integrated circuit (ASIC), a microprocessor (DSP), a field-programmable gate array (FPGA), or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof.

[0091] This invention also provides a computer program product containing instructions that, when executed on a computer, cause the computer to perform any of the methods described in the above embodiments. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the flow or function according to the embodiments of this invention is generated. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired means, such as coaxial cable, optical fiber, digital subscriber line (DSL), or wireless means (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium accessible to a computer or a data storage device such as a server or data center that integrates one or more available media. The available medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., SSD), etc.

[0092] It should be noted that the devices for storing computer instructions or computer programs provided in the embodiments of the present invention, such as, but not limited to, the aforementioned memory, computer-readable storage medium, and communication chip, are all non-transitory. Those skilled in the art should recognize that the functions described in the embodiments of the present invention in one or more of the above examples can be implemented using hardware, software, firmware, or any combination thereof. When implemented using software, these functions can be stored in a computer-readable storage medium or transmitted as one or more instructions or code on a computer-readable storage medium. Computer-readable storage media include computer storage media and communication media, wherein communication media include any medium that facilitates the transmission of computer programs from one place to another. Storage media can be any available medium accessible to general-purpose or special-purpose computers.

[0093] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A step-by-step balloon control method for preventing venous thrombosis based on infrared detection, characterized in that, The method includes: The tissue oxygen saturation of at least one monitoring point of the target limb of the target user is obtained by a near-infrared sensor, wherein the target limb includes the left lower limb, right lower limb, left upper limb and right upper limb; The control parameters of the stepped airbag are determined based on the tissue oxygen saturation. The stepped airbag includes multiple independently controllable airbag units divided along the long axis of the target limb. The control parameters include the compression pressure and compression frequency of each airbag unit. The stepped airbag worn on the target limb is controlled according to the control parameters to ensure that the tissue oxygen saturation of the target limb reaches a preset state. The preset state includes: when the target user is a hemiplegic individual, the difference in tissue oxygen saturation between the hemiplegic lower limb and the healthy lower limb of the target user is less than a preset balance threshold; and when the target user is a paralyzed individual, the tissue oxygen saturation of both lower limbs of the target user is within a preset tissue oxygen saturation range, and the tissue oxygen saturation of both upper limbs of the target user is within a preset tissue oxygen saturation range.

2. The method according to claim 1, characterized in that, The monitoring points for the left and right lower limbs include the medial side of the gastrocnemius muscle, the distal end of the quadriceps femoris muscle, and / or the posterior calf muscle group. When the target user is a hemiplegic individual, determining the control parameters of the stepped airbag based on the tissue oxygen saturation includes: Determine the difference in tissue oxygen saturation between the hemiplegic lower limb and the unaffected lower limb of the target user, wherein the hemiplegic lower limb and the unaffected lower limb are one of the left and right lower limbs, respectively; When the tissue oxygen saturation difference is greater than or equal to a preset balance threshold, the first control parameters for the stepped airbags worn on the hemiplegic lower limb are generated: the first control parameters are used to control each airbag unit to be squeezed sequentially from the distal end to the proximal end of the limb, wherein the squeezing pressure of the distal airbag unit is 35-45 mmHg, the squeezing pressure of the proximal airbag unit is 25-35 mmHg, the squeezing frequency is 1-3 times / minute, the distal airbag unit is the airbag unit set in the lower leg segment, and the proximal airbag unit is the airbag unit set in the thigh segment.

3. The method according to claim 2, characterized in that, When the target user is a paralyzed individual, determining the control parameters of the stepped airbag based on the tissue oxygen saturation includes: If the tissue oxygen saturation at at least one monitoring point of any lower limb is lower than the preset tissue oxygen saturation range lower limit, a second control parameter is generated for the stepped airbag worn on the lower limb: the second control parameter is used to control each airbag unit to be squeezed in a stepped manner from the distal end to the proximal end, with a squeezing pressure gradient of 5-10 mmHg and a squeezing frequency of 2-3 times / minute. If the tissue oxygen saturation of both lower limbs is within the preset tissue oxygen saturation range, a third control parameter is generated: the third control parameter is used to control the airbag unit corresponding to both lower limbs to work with a compression pressure of 15-25 mmHg and a compression frequency of 1-2 times / minute.

4. The method according to claim 3, characterized in that, The monitoring points for the left and right upper limbs include the medial side of the biceps brachii, the forearm flexor muscles, and / or the posterior upper arm muscles. When the target user is a paralyzed individual, determining the control parameters of the stepped airbag based on the tissue oxygen saturation further includes: If the tissue oxygen saturation at at least one monitoring point on any upper limb is lower than the preset tissue oxygen saturation range lower limit, a fourth control parameter is generated for the stepped airbag worn on the upper limb: the fourth control parameter is used to control each airbag unit to be squeezed sequentially from the distal end to the proximal end of the limb, wherein the squeezing pressure of the distal airbag unit is 30-40 mmHg, the squeezing pressure of the proximal airbag unit is 20-30 mmHg, the squeezing frequency is 1-3 times / minute, the distal airbag unit is the airbag unit set in the forearm segment, and the proximal airbag unit is the airbag unit set in the upper arm segment; If the tissue oxygen saturation of both upper limbs is within the preset tissue oxygen saturation range, a fifth control parameter is generated: the fifth control parameter is used to control the airbag unit corresponding to both upper limbs to work with a compression pressure of 15-25 mmHg and a compression frequency of 1-2 times / minute.

5. The method according to claim 4, characterized in that, The step-type airbag worn on the target limb is controlled to operate according to the control parameters, including: Inflate and compress the most distal airbag unit first, following the direction of venous return in the target limb. After the farthest airbag unit is kept in a compressed state for 5-10 seconds, the adjacent airbag units at the near end are sequentially controlled to inflate and compress. The time interval between the deflation of the previous airbag unit and the inflation of the next airbag unit is 1-3 seconds, and the deflation time of each airbag unit is 15-40 seconds.

6. The method according to claim 5, characterized in that, The method further includes: The pressure distribution data at the contact points between the stepped airbags worn by the target user on the upper and lower limbs and the skin are obtained through a flexible pressure sensor. If any pressure value in the pressure distribution data is greater than a preset pressure threshold, the compression pressure of the corresponding airbag unit is reduced so that the pressure value is less than or equal to the preset pressure threshold.

7. The method according to claim 6, characterized in that, The method further includes: Determine the tissue oxygen balance index of each target limb of the target user; An alarm message is generated when the tissue oxygen balance index of any target limb of the target user is greater than a preset alarm threshold and the duration exceeds a preset alarm duration. The formula for determining the tissue oxygen balance index R of the target limb is as follows: R = |S1-S0| / S0; Wherein, S1 is the current tissue oxygen saturation of the target limb, and S0 is the preset baseline tissue oxygen saturation of the target limb.

8. The method according to claim 7, characterized in that, Each airbag unit of the stepped airbag is equipped with an independent pressure feedback unit, which is used for: Real-time acquisition of the actual compression pressure of the corresponding airbag unit; The actual extrusion pressure is compared with the extrusion pressure in the control parameters; If the difference between the actual compression pressure and the compression pressure in the control parameters is greater than the pressure difference threshold, adjust the inflation volume of the airbag unit so that the difference between the actual compression pressure and the compression pressure in the control parameters is less than or equal to the pressure difference threshold.

9. A stepped airbag control system for preventing venous thrombosis based on infrared detection, characterized in that, The system includes: The data acquisition module is used to acquire the tissue oxygen saturation of at least one monitoring point of the target limb of the target user through a near-infrared sensor, wherein the target limb includes the left lower limb, right lower limb, left upper limb and right upper limb; The parameter determination module is used to determine the control parameters of the stepped airbag based on the tissue oxygen saturation. The stepped airbag includes multiple independently controllable airbag units divided along the long axis of the target limb. The control parameters include the compression pressure and compression frequency of each airbag unit. An airbag control module is used to control the operation of the stepped airbag worn on the target limb according to the control parameters, so that the tissue oxygen saturation of the target limb reaches a preset state. The preset state includes: when the target user is a hemiplegic individual, the difference in tissue oxygen saturation between the hemiplegic lower limb and the healthy lower limb of the target user is less than a preset balance threshold; and when the target user is a paralyzed individual, the tissue oxygen saturation of both lower limbs of the target user is within a preset tissue oxygen saturation range, and the tissue oxygen saturation of both upper limbs of the target user is within a preset tissue oxygen saturation range.

10. An electronic device, characterized in that, include: processor; Memory used to store the processor's executable instructions; The processor is configured to execute the instructions to implement the step-by-step balloon control method for preventing venous thrombosis based on infrared detection as described in any one of claims 1-8.

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