Non-invasive assist circulation apparatus

Abstract

This application discloses a non-invasive circulatory assistive device, comprising: a housing, a flexible component, a drive element, a posture sensor, and a control module. The housing defines a mounting cavity; the flexible component is connected to the housing and located outside the mounting cavity; the drive element is disposed within the mounting cavity and connected to the flexible component, and the drive element is capable of executing a first pressure reference or a second pressure reference, driving the flexible component to pressurize or depressurize, wherein the first pressure reference is greater than the second pressure reference; the posture sensor is disposed within the flexible component and is capable of acquiring the kinematic posture of the flexible component; the control module is disposed within the mounting cavity, and both the posture sensor and the drive element are electrically connected to the control module. The control module is capable of controlling the drive element to execute the first pressure reference when the flexible component is in a sitting posture, and controlling the drive element to execute the second pressure reference when the flexible component is in a moving posture. The non-invasive circulatory assistive device of this application can execute the corresponding pressure reference according to the patient's sitting or moving posture, thereby achieving dynamic adjustment.

Description

Technical Field

[0001] This application relates to the field of rehabilitation devices, and more particularly to a non-invasive circulatory assist device. Background Technology

[0002] Lower extremity vascular diseases such as diabetic foot, deep vein thrombosis, and varicose veins often lead to local circulatory disorders, severely impacting patients' quality of life. Mechanical pressure-assisted circulation is an important and commonly used non-invasive intervention in the prevention and treatment of lower extremity vascular diseases. It has advantages such as being radiation-free and having no drug side effects, and can play a positive role in the early stages of the disease, replacing medication or surgery.

[0003] However, current assistive devices cannot adjust pressure according to the patient's posture, resulting in poor rehabilitation outcomes. Summary of the Invention

[0004] The purpose of this application is to at least address the problem that current assistive devices cannot adjust pressure according to the patient's posture, resulting in poor rehabilitation outcomes. This purpose is achieved through the following means: This application discloses a non-invasive circulatory assist device, comprising: a housing, a flexible component, a drive element, a posture sensor, and a control module. The housing defines a mounting cavity; the flexible component is connected to the housing and located outside the mounting cavity; the drive element is disposed within the mounting cavity, connected to the flexible component, and configured to execute a first pressure reference or a second pressure reference to drive the flexible component to pressurize or depressurize, wherein the first pressure reference is greater than the second pressure reference; the posture sensor is disposed within the flexible component and configured to acquire the kinematic posture of the flexible component; the control module is disposed within the mounting cavity, and both the posture sensor and the drive element are electrically connected to the control module. The control module is configured to control the drive element to execute the first pressure reference when the flexible component is in a seated posture, and the control module is further configured to control the drive element to execute the second pressure reference when the flexible component is in a motion posture.

[0005] The non-invasive circulatory assist device of this application embodiment collects the kinematic posture of the flexible component in real time through a posture sensor. The control module dynamically adjusts the drive component to execute a first or second pressure reference based on the posture judgment result, thereby achieving intelligent control of pressurizing or depressurizing the flexible component. The physiological characteristics of increased hydrostatic pressure and increased venous return resistance in the lower limbs during a sitting posture allow for sufficient auxiliary thrust through a higher first pressure reference, effectively promoting blood return from the lower limbs. During exercise, the natural circulatory action of the muscle pump is provided with moderate assistance through a lower second pressure reference, enhancing the circulatory effect while avoiding interference with normal leg movement. By adjusting the pressure according to sitting or exercise postures, the device can adapt to the physiological needs of patients in different activity states, thereby optimizing the auxiliary circulatory effect for lower limb vascular diseases and improving the patient's rehabilitation process.

[0006] In some embodiments, the flexible component includes a plurality of flexible airbags, and the non-invasive circulatory device includes a plurality of control valves, each of the plurality of control valves being connected to a plurality of flexible airbags in a one-to-one correspondence. Each of the control valves is connected to the drive component and electrically connected to the control module. The control module is configured to control the plurality of control valves to open or close in a preset sequence so as to generate pressure waves within the plurality of flexible airbags.

[0007] In some embodiments, the flexible component includes a calf mount, and the plurality of flexible airbags include a first flexible airbag and a second flexible airbag disposed on the calf mount. The first flexible airbag and the second flexible airbag are configured to be disposed on both sides of the gastrocnemius muscle and are capable of jointly squeezing the gastrocnemius muscle when inflated to drive the gastrocnemius muscle to squeeze the vein.

[0008] In some embodiments, the plurality of flexible airbags further include a third flexible airbag and a fourth flexible airbag disposed on the lower leg mount, the third flexible airbag and the fourth flexible airbag being located between the first flexible airbag and the second flexible airbag, the third flexible airbag and the fourth flexible airbag being configured to press against the medial head and the lateral head of the gastrocnemius muscle respectively, and to drive the gastrocnemius muscle to relax during impact.

[0009] In some embodiments, the control module is configured to inflate the first flexible airbag and the second flexible airbag via the drive member, while the third flexible airbag and the fourth flexible airbag contract. The control module is also configured to inflate the third flexible airbag and the fourth flexible airbag via the drive member, while the first flexible airbag and the second flexible airbag contract.

[0010] In some embodiments, the calf mount is circumferentially disposed outside the first flexible airbag, the second flexible airbag, the third flexible airbag, and the fourth flexible airbag, and the calf mount is configured to limit the radial expansion of the first flexible airbag, the second flexible airbag, the third flexible airbag, and the fourth flexible airbag.

[0011] In some embodiments, the flexible component includes a thigh mount, and the plurality of flexible airbags include a fifth flexible airbag and a sixth flexible airbag disposed on the thigh mount. The fifth flexible airbag is configured to press against the quadriceps muscle, and the sixth flexible airbag is configured to press against the hamstring muscle. The control module is further configured to inflate the sixth flexible airbag when the fifth flexible airbag is contracted by the drive member, and the control module is further configured to contract the sixth flexible airbag when the fifth flexible airbag is inflated by the drive member.

[0012] In some embodiments, the thigh mount is circumferentially disposed around the fifth and sixth flexible airbags, and the thigh mount is configured to limit the radial expansion of the fifth and sixth flexible airbags.

[0013] In some embodiments, the non-invasive circulatory assist device further includes a pressure sensor disposed on the flexible component and electrically connected to the control module; and / or, the non-invasive circulatory assist device further includes a power supply component comprising a battery and a power supply circuit, wherein the drive element, the attitude sensor, and the control module are all electrically connected to the power supply circuit, and the battery is electrically connected to the power supply circuit and configured to supply power to the drive element, the attitude sensor, and the control module; and / or, the non-invasive circulatory assist device further includes a hemodynamic detection module electrically connected to the control module, the hemodynamic detection module being used to detect blood flow status.

[0014] In some embodiments, the attitude sensor includes an accelerometer and a gyroscope, both of which are disposed on the flexible component. The accelerometer is used to collect the acceleration of the flexible component, and the gyroscope is used to collect the attitude of the flexible component. The control module is used to determine whether the flexible component is in the sitting posture or the moving posture based on the acceleration and the attitude. Attached Figure Description

[0015] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. Wherein: Figure 1 This is a three-dimensional schematic diagram of the non-invasive circulatory assist device according to an embodiment of this application; Figure 2 This is a front view of the non-invasive circulatory assist device according to an embodiment of this application; Figure 3 This is a bottom view of the non-invasive circulatory assist device according to an embodiment of this application; Figure 4 This is a left view of the non-invasive circulatory assist device according to an embodiment of this application; Figure 5 This is a cross-sectional view of the thigh mounting component and the lower leg mounting component according to an embodiment of this application; Figure 6 This is a schematic diagram of the lower leg mounting component according to an embodiment of this application; Figure 7 This is a schematic diagram of the operation of the lower leg mounting component according to an embodiment of this application; Figure 8 This is a schematic diagram of the control relationship of the non-invasive circulatory assist device according to an embodiment of this application.

[0016] The labels in the attached diagram are as follows: 100. Non-invasive circulatory assist devices; 10. Housing; 11. Handle; 12. Support base; 13. First adjustment lever; 14. Second adjustment lever; 15. First button; 16. Second button; 17. Third button; 18. Fourth button; 19. Main screen; 20. Flexible component; 21. First flexible airbag; 22. Second flexible airbag; 23. Third flexible airbag; 24. Fourth flexible airbag; 25. Fifth flexible airbag; 26. Sixth flexible airbag; 27. Lower leg mounting component; 28. Thigh mounting component; 30. Drive components; 40. Attitude sensor; 50. Control module; 60. Control valve; 70. Pressure sensor; 80. Hemodynamics detection module. Detailed Implementation

[0017] Exemplary embodiments of this application will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of this application are shown in the drawings, it should be understood that this application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of this application and to fully convey the scope of this application to those skilled in the art.

[0018] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0019] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0020] For ease of description, spatial relative terms may be used in the text to describe the relationship of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "over," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure rotates, then an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0021] In the description of the application, the technical terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "circumferential", "height direction", "first direction", "second direction", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed, operated or used in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0022] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between components; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0023] Lower extremity vascular diseases such as diabetic foot, deep vein thrombosis, and varicose veins often lead to local circulatory disorders, severely impacting patients' quality of life. Mechanical pressure-assisted circulation is an important and commonly used non-invasive intervention in the prevention and treatment of lower extremity vascular diseases. It has advantages such as being radiation-free and having no drug side effects, and can play a positive role in the early stages of the disease, replacing medication or surgery.

[0024] However, current assistive devices cannot adjust pressure according to the patient's posture, resulting in poor rehabilitation outcomes.

[0025] To address the problem that current assistive devices cannot adjust pressure according to the patient's posture, resulting in poor rehabilitation outcomes, embodiments of this application propose a non-invasive circulatory assistive device 100 that can execute corresponding pressure benchmarks based on the patient's sitting or moving posture, thereby achieving dynamic adjustment of the assistive circulatory pressure.

[0026] Combination Figures 1 to 8As shown, the non-invasive circulatory assist device 100 of this application embodiment includes: a housing 10, a flexible component 20, a drive member 30, a posture sensor 40, and a control module 50. The housing 10 defines an installation cavity; the flexible component 20 is connected to the housing 10 and located outside the installation cavity; the drive member 30 is disposed inside the installation cavity, connected to the flexible component 20, and configured to execute a first pressure reference or a second pressure reference to drive the flexible component 20 to pressurize or depressurize, wherein the first pressure reference is greater than the second pressure reference; the posture sensor 40 is disposed on the flexible component 20 and configured to collect the kinematic posture of the flexible component 20; the control module 50 is disposed inside the installation cavity, and both the posture sensor 40 and the drive member 30 are electrically connected to the control module 50. The control module 50 is configured to control the drive member 30 to execute the first pressure reference when the flexible component 20 is in a sitting posture, and the control module 50 is also configured to control the drive member 30 to execute the second pressure reference when the flexible component 20 is in a motion posture.

[0027] The housing 10 serves as the mounting base, defining a closed mounting cavity. This cavity provides a protective space for internal components, preventing external dust and moisture from corroding electrical components and drive mechanisms, thereby ensuring the overall structural stability of the device. The housing 10 can be made of lightweight, high-strength materials, such as plastic or aluminum alloy, reducing the overall weight of the device and improving wearing comfort while meeting structural strength requirements.

[0028] The flexible component 20 is detachably connected to the housing 10, using methods such as snap-fit ​​or Velcro, facilitating disassembly, cleaning, and replacement. Located outside the mounting cavity, the flexible component 20 conforms to the contours of the human lower limb, allowing for a close fit to the skin surface. The flexible component 20 can be made of medical-grade flexible materials, such as silicone or thermoplastic polyurethane (TPU) film, possessing good elasticity and biocompatibility to prevent skin irritation or damage from prolonged wear.

[0029] The drive unit 30 is disposed within the mounting cavity and connected to the flexible component 20 via an air passage. The drive unit 30 is configured to selectively execute a first pressure reference or a second pressure reference, driving the flexible component 20 to expand or contract through pressurization or depressurization, so that the flexible component 20 can apply circulatory pressure to the lower limbs. The first pressure reference is greater than the second pressure reference. The specific values ​​of the first and second pressure references can be preset according to clinical application, the patient's physical condition, and the patient's illness. For example, when a patient has diabetic foot, the first pressure reference can be set to 30 mmHg-45 mmHg, and the second pressure reference to 15 mmHg-25 mmHg. Similarly, when a patient has varicose veins, the first pressure reference can be set to 45 mmHg-55 mmHg, and the second pressure reference to 30 mmHg-40 mmHg. This allows the non-invasive circulatory assist device 100 of this embodiment to adapt to the blood circulation needs in different postures. As an example, the drive unit 30 can be a miniature air compressor pump, which is small in size, low in noise, and has stable output pressure, and can accurately respond to the commands of the control module 50.

[0030] The posture sensor 40 is connected to the flexible component 20. For example, the posture sensor 40 is installed in the middle of the flexible component 20 to most accurately collect the movement posture information of the lower limbs. As an example, the posture sensor 40 can determine whether the patient's lower limbs are in a sitting or moving posture by collecting kinematic parameters such as the spatial posture, motion acceleration, and angular velocity of the flexible component 20 in real time. For example, when a continuous low-frequency low-acceleration signal is detected, it is determined to be a sitting posture; when a periodic high-frequency acceleration signal is detected, it is determined to be a moving posture.

[0031] The control module 50 is located inside the mounting cavity. The attitude sensor 40 and the drive component 30 are both electrically connected to the control module 50 via wires. The control module 50 receives the kinematic attitude signal transmitted by the attitude sensor 40 through the signal acquisition module, analyzes and determines the current attitude of the flexible component 20 through internal algorithms, and then sends a pressure reference execution command to the drive component 30 through the command output module: when the attitude is determined to be sitting, the drive component 30 is controlled to execute the first pressure reference; when the attitude is determined to be moving, the drive component 30 is controlled to execute the second pressure reference, thereby realizing dynamic adaptive adjustment of pressure.

[0032] As an example, the control module 50 can use a microcontroller unit (MCU) as the core processing chip. The microcontroller unit integrates a signal acquisition module, an instruction output module, and a power management module to meet the control function requirements of the control module 50.

[0033] The non-invasive circulatory assist device 100 of this application embodiment collects the kinematic posture of the flexible component 20 in real time through the posture sensor 40, and the control module 50 dynamically adjusts the drive component 30 to execute a first pressure reference or a second pressure reference based on the posture judgment result, thereby realizing intelligent control of pressurization or depressurization of the flexible component 20. The physiological characteristics of increased hydrostatic pressure and increased venous return resistance in the lower limbs during a sitting posture allow for sufficient auxiliary thrust through a higher first pressure reference, effectively promoting blood return from the lower limbs. During exercise, the natural circulatory action of the muscle pump is provided with moderate assistance through a lower second pressure reference, enhancing the circulatory effect while avoiding interference with normal leg movement. By adjusting the pressure according to sitting or exercise postures, the device can adapt to the physiological needs of patients in different activity states, thereby optimizing the auxiliary circulatory effect for lower limb vascular diseases and improving the patient's rehabilitation process.

[0034] In some embodiments, the attitude sensor 40 acquires the acceleration and angular velocity signals of the flexible component 20 in real time, and the control module 50 filters the acquired raw signals to remove environmental interference noise and extract effective kinematic feature parameters.

[0035] When the amplitude of the acceleration signal is small and the fluctuation is gentle, for example, the root mean square value of the acceleration is less than 0.5g (g is the acceleration due to gravity), and the amplitude of the angular velocity signal is close to zero with no obvious periodic change, it is determined that the flexible component 20 is in a seated posture, and the control module 50 controls the drive component 30 to execute the first pressure reference.

[0036] This embodiment can determine the sitting posture through the posture sensor 40, thereby providing a basis for the subsequent operation steps of the control module 50.

[0037] In some embodiments, the attitude sensor 40 acquires the acceleration and angular velocity signals of the flexible component 20 in real time, and the control module 50 filters the acquired raw signals to remove environmental interference noise and extract effective kinematic feature parameters.

[0038] When the acceleration signal exhibits periodic fluctuations, for example, the amplitude of the acceleration is between 0.8g and 2.0g, and the fluctuation period coincides with the gait period, for example, 0.5 seconds to 1.5 seconds, and the angular velocity signal shows a significant peak during lower limb swing, for example, the peak range is 50° / s to 150° / s, it is determined that the flexible component 20 is in a motion posture. The control module 50 then controls the drive component 30 to execute the second pressure reference.

[0039] This embodiment can determine the motion posture through the attitude sensor 40, thereby providing a basis for the subsequent operation steps of the control module 50.

[0040] Combination Figures 5 to 7As shown, in some embodiments, the flexible component 20 includes multiple flexible airbags, and the non-invasive circulatory device 100 includes multiple control valves 60. The multiple control valves 60 are connected to the multiple flexible airbags one by one. Each control valve 60 is connected to the drive component 30 and electrically connected to the control module 50. The control module 50 is configured to control the multiple control valves 60 to open or close in a preset sequence so as to form pressure waves in the multiple flexible airbags.

[0041] Flexible airbags have independent, inflatable chambers that can be inflated or deflated, allowing for the application of localized pressure to different areas of the leg. As an example, flexible airbags are made of medical-grade silicone material for excellent elastic resilience and biocompatibility.

[0042] Multiple flexible airbags can be independently controlled by the control valve, and each flexible airbag can be independently controlled by changing the on / off state of the control valve.

[0043] The control module 50 can have a built-in algorithm and be configured to control multiple control valves 60 to open or close sequentially according to a preset order. For example, when the flexible component 20 includes multiple flexible airbags distributed along the length of the lower limb, the control module 50 controls the control valves 60 to open and inflate sequentially, starting from the airbags near the foot, and then close and depressurize sequentially, starting from the flexible airbags away from the foot, so that a pressure wave is formed in the multiple flexible airbags that progresses from the distal end to the proximal end; or, according to rehabilitation needs, the pressure wave is controlled to propagate in a proximal-to-distal or local reciprocating order.

[0044] The non-invasive circulatory device 100 of this application embodiment has a control module 50 that precisely controls the opening or closing sequence of multiple control valves 60, so that the flexible airbag can be inflated and deflated in a preset order, thereby forming a pressure wave with a specific direction and rhythm inside the flexible component 20, which effectively improves the efficiency of blood flow.

[0045] Combination Figures 5 to 7 As shown, in some embodiments, the flexible component 20 includes a calf mount 27, and a plurality of flexible airbags including a first flexible airbag 21 and a second flexible airbag 22 disposed on the calf mount 27. The first flexible airbag 21 and the second flexible airbag 22 are configured to be disposed on both sides of the gastrocnemius muscle and can jointly squeeze the gastrocnemius muscle when inflated to drive the gastrocnemius muscle to squeeze the vein.

[0046] The calf mount 27 is a structure used to secure the flexible airbag to the calf. The primary function of the calf mount 27 is to provide stable support and precise positioning, ensuring that the flexible airbag acts accurately on the gastrocnemius muscle. As an example, the calf mount 27 can be designed as a sleeve-like structure encircling the calf, made of elastic and breathable materials (such as medical-grade silicone, neoprene, or composite fabrics). The calf mount 27 may have integrated or provided chambers or connection points for securing the flexible airbag. Alternatively, the calf mount 27 can also be an adjustable strap-type structure, secured to the calf by Velcro, snaps, or zippers.

[0047] The first flexible airbag 21 and the second flexible airbag 22 are configured to be located on both sides of the gastrocnemius muscle and can jointly compress the gastrocnemius muscle during inflation to drive the gastrocnemius muscle to compress the veins. The control module 50 is configured to control the first flexible airbag 21 and the second flexible airbag 22 to inflate or depressurize synchronously. During inflation, the first flexible airbag 21 and the second flexible airbag 22 expand simultaneously, applying a compressive force from both sides of the gastrocnemius muscle towards the middle to drive the gastrocnemius muscle to contract, thereby compressing the lower limb veins and accelerating venous blood flow; during depressurization, the first flexible airbag 21 and the second flexible airbag 22 contract synchronously, releasing the compressive force, and the gastrocnemius muscle naturally relaxes.

[0048] The non-invasive circulatory assist device 100 of this application embodiment has a first flexible airbag 21 and a second flexible airbag 22 in the flexible component 20 disposed on both sides of the gastrocnemius muscle. When the first flexible airbag 21 and the second flexible airbag 22 are inflated, they can jointly apply pressure to the gastrocnemius muscle, effectively simulating the physiological function of the gastrocnemius muscle pump. This can significantly improve the compression efficiency and uniformity of the gastrocnemius muscle, thereby more effectively driving the gastrocnemius muscle to compress the vein and promote venous blood flow.

[0049] Combination Figures 5 to 7 As shown, in some embodiments, the multiple flexible airbags also include a third flexible airbag 23 and a fourth flexible airbag 24 disposed on the calf mounting member 27. The third flexible airbag 23 and the fourth flexible airbag 24 are located between the first flexible airbag 21 and the second flexible airbag 22. The third flexible airbag 23 and the fourth flexible airbag 24 are configured to press against the medial head and the lateral head of the gastrocnemius muscle, respectively, and are capable of driving the gastrocnemius muscle to relax during impact.

[0050] The third flexible air bladder 23 and the fourth flexible air bladder 24 are configured to drive the gastrocnemius muscle to relax upon inflation. When the third flexible air bladder 23 and the fourth flexible air bladder 24 are inflated, the pressure generated by their expansion can apply a gentle, continuous, or pulsating traction or massage force to the medial and lateral heads of the gastrocnemius muscle, thereby helping to stretch muscle fibers, relieve muscle tension, and promote muscle relaxation. Furthermore, the pressure generated by inflation can promote local blood circulation and accelerate the removal of metabolic waste, thereby indirectly promoting muscle relaxation and recovery, and effectively combating stiffness and fatigue that may occur after prolonged compression. Those skilled in the art will understand that excessive inflation pressure of the third flexible air bladder 23 and the fourth flexible air bladder 24 should be avoided to prevent excessive compression of the gastrocnemius muscle, and thus to prevent gastrocnemius muscle contraction caused by inflation of the third flexible air bladder 23 and the fourth flexible air bladder 24.

[0051] The non-invasive circulatory assist device 100 of this application embodiment, by setting a third flexible airbag 23 and a fourth flexible airbag 24, and configuring the third flexible airbag 23 and the fourth flexible airbag 24 to press against the medial head and lateral head of the gastrocnemius muscle, respectively, can apply directional pressure to specific parts of the gastrocnemius muscle when inflated. This actively drives the gastrocnemius muscle to relax, thereby enabling active relaxation control of the gastrocnemius muscle. The active inflation and relaxation effect of the third flexible airbag 23 and the fourth flexible airbag 24 can promote the relaxation and recovery of the gastrocnemius muscle, avoiding fatigue and stiffness caused by continuous muscle tension. Therefore, it can optimize the efficiency of blood circulation in the calf, ensure more sufficient blood flow, and help prevent muscle damage, thus comprehensively improving the therapeutic effect of assisted circulation.

[0052] In some embodiments, the control module 50 is configured to inflate the first flexible airbag 21 and the second flexible airbag 22 via the drive member 30, while the third flexible airbag 23 and the fourth flexible airbag 24 contract. The control module 50 is also configured to inflate the third flexible airbag 23 and the fourth flexible airbag 24 via the drive member 30 when the first flexible airbag 21 and the second flexible airbag 22 contract.

[0053] When the first flexible airbag 21 and the second flexible airbag 22 are inflated, they compress the gastrocnemius muscle from both sides. The third flexible airbag 23 and the fourth flexible airbag 24 contract, providing space for the gastrocnemius muscle to contract and reducing resistance. When the first and second flexible airbags contract, the third and fourth flexible airbags inflate, applying a thrust from the medial and lateral heads of the gastrocnemius muscle, thereby driving its relaxation and repositioning. Through the coordinated action of the first flexible airbag 21, the second flexible airbag 22, the third flexible airbag 23, and the fourth flexible airbag 24, a synergistic cycle of compression and relaxation of the gastrocnemius muscle is formed, making the compression and relaxation movements more continuous and efficient. This significantly improves the efficiency of blood circulation assistance and patient comfort, and simulates the physiological process of the gastrocnemius muscle pumping blood during walking, thus optimizing rehabilitation outcomes.

[0054] In some embodiments, the calf mount 27 is arranged around the first flexible airbag 21, the second flexible airbag 22, the third flexible airbag 23 and the fourth flexible airbag 24, and the calf mount 27 is configured to limit the radial expansion of the first flexible airbag 21, the second flexible airbag 22, the third flexible airbag 23 and the fourth flexible airbag 24.

[0055] The calf mount 27 is configured to limit the radial expansion of the first flexible airbag 21, the second flexible airbag 22, the third flexible airbag 23, and the fourth flexible airbag 24. This means that when the flexible airbags are inflated, the calf mount 27 can effectively prevent the first flexible airbag 21, the second flexible airbag 22, the third flexible airbag 23, and the fourth flexible airbag 24 from expanding excessively in their radial direction, i.e., away from the center of the calf. This allows the inflation energy of the flexible airbags to act efficiently and accurately on the target muscles, avoiding energy dissipation in unexpected directions.

[0056] As an example, the calf mount 27 can be made of materials with sufficient rigidity and tensile strength, such as high-strength engineering plastics, carbon fiber composites, or fabrics with embedded support skeletons. The material properties and structural design themselves can resist the radial expansion force of the flexible airbag. As other examples, the inner surface of the calf mount 27 can be designed with specific limiting structures, such as protrusions, grooves, reinforcing ribs, or anti-slip textures, so that the structure can conform to the shape of the flexible airbag, further securing the airbag and preventing displacement or irregular radial expansion during inflation. As yet another example, the calf mount 27 can integrate an adjustable fastening mechanism, such as a tightening strap controlled by a knob, pneumatic, or hydraulic system, allowing the user or control module 50 to precisely adjust the radial restraint force of the calf mount 27 on the flexible airbag according to actual needs, to adapt to different treatment requirements and individual differences.

[0057] The non-invasive circulatory assist device 100 of this application embodiment optimizes the structural design of the calf mounting component 27, reducing the degree of radial expansion of the flexible airbag during inflation, thereby significantly improving the precise compression and relaxation control of the gastrocnemius muscle, and reducing energy loss and possible user discomfort, thus enhancing the reliability and rehabilitation effect of blood circulation assistance.

[0058] like Figure 5 As shown, in some embodiments, the flexible component 20 includes a thigh mounting member 28, and a plurality of flexible airbags including a fifth flexible airbag 25 and a sixth flexible airbag 26 disposed on the thigh mounting member 28. The fifth flexible airbag 25 is configured to press against the quadriceps muscle, and the sixth flexible airbag 26 is configured to press against the hamstring muscle. The control module 50 is also configured to inflate the sixth flexible airbag 26 when the fifth flexible airbag 25 is contracted by the drive member 30, and the control module 50 is also configured to contract the sixth flexible airbag 26 when the fifth flexible airbag 25 is inflated by the drive member 30.

[0059] The thigh mount 28 can support the fifth flexible airbag 25 and the sixth flexible airbag 26, and can mount the fifth flexible airbag 25 and the sixth flexible airbag 26 in the thigh area.

[0060] The quadriceps femoris, located in the front of the thigh, is one of the largest muscles in the human body. Its contraction plays a crucial role in venous flow in the lower limbs. Applying pressure to the quadriceps femoris using the fifth flexible airbag 25 effectively assists blood circulation in the quadriceps femoris-related area. The hamstrings, located in the back of the thigh, have an antagonistic relationship with the quadriceps femoris. Applying pressure to the hamstrings using the sixth flexible airbag 26 works synergistically with the fifth flexible airbag 25 to jointly promote blood circulation in the thigh region.

[0061] The non-invasive circulatory assist device 100 of this application embodiment, by setting a thigh mounting component 28, a fifth flexible airbag 25, and a sixth flexible airbag 26, with the fifth and sixth flexible airbags 25 respectively pressing against the quadriceps femoris and hamstring muscles. The control module 50, through the drive component 30, realizes the alternating control of the sixth flexible airbag 26 inflating when the fifth flexible airbag 25 contracts, and the sixth flexible airbag 26 contracting when the fifth flexible airbag 25 is inflated, thereby effectively simulating the natural antagonistic movement of the quadriceps femoris and hamstring muscles, thereby promoting venous blood flow and significantly improving the blood circulation efficiency in the thigh area.

[0062] like Figure 5 As shown, in some embodiments, the thigh mount 28 is arranged around the fifth flexible airbag 25 and the sixth flexible airbag 26, and the thigh mount 28 is configured to limit the radial expansion of the fifth flexible airbag 25 and the sixth flexible airbag 26.

[0063] The thigh mount 28 is configured to limit the radial expansion of the fifth flexible airbag 25 and the sixth flexible airbag 26. This means that when the flexible airbags are inflated, the thigh mount 28 can effectively prevent the fifth flexible airbag 25 and the sixth flexible airbag 26 from expanding excessively in the radial direction, that is, away from the center of the thigh. This allows the inflation energy of the flexible airbags to act on the target muscles efficiently and accurately, avoiding energy dissipation in unexpected directions.

[0064] As an example, the thigh mount 28 can be made of materials with sufficient rigidity and tensile strength, such as high-strength engineering plastics, carbon fiber composites, or fabrics with embedded support skeletons. The material properties and structural design themselves can resist the radial expansion force of the flexible airbag. As other examples, the inner surface of the thigh mount 28 can be designed with specific limiting structures, such as protrusions, grooves, reinforcing ribs, or anti-slip textures, so that the structure can conform to the shape of the flexible airbag, further securing the airbag and preventing displacement or irregular radial expansion during inflation. As yet another example, the thigh mount 28 can integrate an adjustable fastening mechanism, such as a tightening strap controlled by a knob, pneumatic, or hydraulic system, allowing the user or control module 50 to precisely adjust the radial restraint force of the thigh mount 28 on the flexible airbag according to actual needs, to adapt to different treatment requirements and individual differences.

[0065] The non-invasive circulatory assist device 100 of this application embodiment optimizes the structural design of the thigh mounting component 28, reducing the degree of radial expansion of the flexible airbag during inflation, thereby significantly improving the precise compression and relaxation control of the quadriceps and hamstring muscles, and reducing energy loss and potential user discomfort, thus enhancing the reliability and rehabilitation effect of blood circulation assistance.

[0066] like Figure 8 As shown, in some embodiments, the non-invasive circulatory assist device 100 further includes a pressure sensor 70, which is disposed on the flexible component 20 and electrically connected to the control module 50.

[0067] The pressure sensor 70 is a device capable of sensing pressure and converting it into an electrical signal. It is used to monitor pressure changes inside or outside the flexible component 20 in real time, providing accurate pressure feedback data to the control module 50. As an example, the pressure sensor 70 can be a piezoresistive pressure sensor, which reflects pressure by measuring changes in resistance, and features fast response and high accuracy. As other examples, the pressure sensor 70 can also be a capacitive pressure sensor, which reflects pressure by measuring changes in capacitance, and has good stability and anti-interference capabilities.

[0068] A pressure sensor 70 is installed on the flexible component 20 and electrically connected to the control module 50, enabling the control module 50 to acquire real-time actual pressure data inside the flexible component 20. Based on real-time pressure feedback, the control module 50 can precisely adjust the pressurization or depressurization operation of the drive component 30 to ensure that the pressure applied to the flexible component 20 is highly consistent with the preset first pressure reference or second pressure reference, thereby significantly improving the effectiveness and safety of the auxiliary cycle.

[0069] In some specific embodiments, the non-invasive circulatory device 100 also includes a buzzer, which is electrically connected to the control module 50. When the feedback value of the pressure sensor 70 exceeds the safety threshold, the control module 50 controls the buzzer to sound an alarm and controls the drive component 30 to release pressure.

[0070] The specific value of the safety threshold can be preset according to clinical application, patient's physical condition, and patient's disease. For example, when a patient has diabetic foot, the safety threshold can be set to 50 mmHg. As another example, when a patient has varicose veins, the safety threshold can be set to 60 mmHg.

[0071] When the pressure sensor 70 feedback value exceeds the safety threshold, the control module 50 controls the buzzer to sound an alarm and controls the drive component 30 to release pressure, thereby preventing accidental injury caused by over-inflation of the flexible airbag and providing a complete safety protection measure.

[0072] In some specific embodiments, the non-invasive circulatory device 100 also includes an alarm light, which is electrically connected to the control module 50. When the feedback value from the pressure sensor 70 exceeds a safety threshold, the control module 50 controls the alarm light to turn on.

[0073] The alarm light can provide further warning when the pressure sensor 70 feedback value exceeds the safety threshold, thereby further improving safety protection measures.

[0074] Combination Figure 1 and Figure 2 As shown, in some specific embodiments, the housing 10 is provided with a first button 15, a second button 16, a third button 17, a fourth button 18 and a main screen 19, all of which are connected to the control module 50.

[0075] The first button 15 is used to control the opening or closing, the second button 16 is used to control the control module 50 to increase the pressure of the drive component 30, the third button 17 is used to set the mode, the first pressure reference and the second pressure reference of the control module 50, and the third button 17 is used to control the control module 50 to decrease the pressure of the drive component 30.

[0076] In some embodiments, the non-invasive circulatory device 100 further includes a power supply assembly, which includes a battery and a power supply circuit. The drive unit 30, the attitude sensor 40, and the control module 50 are all electrically connected to the power supply circuit. The battery is electrically connected to the power supply circuit and is configured to supply power to the drive unit 30, the attitude sensor 40, and the control module 50.

[0077] The power supply assembly provides a stable power supply to core components such as the drive unit 30, attitude sensor 40, and control module 50. As an example, the power supply assembly may include a rechargeable lithium-ion battery, with charging and discharging managed by a built-in charging management circuit. As other examples, the power supply assembly may also include a nickel-metal hydride battery pack, coupled with appropriate voltage regulation and overcurrent protection circuits. As an example, the power supply circuit may employ a DC-DC converter to convert the battery voltage to the stable operating voltage required by each component, and integrate overvoltage, undervoltage, and overcurrent protection functions.

[0078] The power supply configuration provides an independent and stable power supply to the drive unit 30, attitude sensor 40 and control module 50, which greatly enhances the portability and flexibility of the non-invasive circulatory device 100 of this application embodiment.

[0079] In some embodiments, the non-invasive circulatory assist device 100 further includes a hemodynamic detection module 80 electrically connected to the control module 50, the hemodynamic detection module 80 being used to detect blood flow and blood status.

[0080] A hemodynamic monitoring module is a device used to monitor human blood flow parameters in real-time or near real-time. It acquires dynamic blood flow information such as blood flow velocity, blood volume, and vascular resistance, providing the control module with more comprehensive physiological data to optimize assisted circulation strategies. For example, a hemodynamic monitoring module can use a photoplethysmography (PPG) sensor to assess blood perfusion by detecting changes in blood volume at the skin surface; alternatively, it can use a Doppler ultrasound sensor to assess vascular patency and hemodynamic status by measuring blood flow velocity.

[0081] The non-invasive circulatory assist device 100 of this application embodiment, by setting a hemodynamic detection module 80, can realize adaptive adjustment of the circulatory assist pressure, enabling the control module 50 to dynamically optimize working parameters according to the patient's real-time blood flow status, and further improve the personalization and precision of rehabilitation effects.

[0082] In some embodiments, the pressure sensor 70 and the hemodynamic detection module 80 are both electrically connected to a power supply circuit, and the battery is electrically connected to the power supply circuit and configured to power the pressure sensor 70 and the hemodynamic detection module 80.

[0083] The power supply configuration provides independent and stable power to the pressure sensor 70 and the hemodynamic detection module 80, further enhancing the portability and flexibility of the non-invasive circulatory assist device 100 of this application embodiment.

[0084] In some embodiments, the attitude sensor 40 includes an accelerometer and a gyroscope, both of which are located on the flexible component 20. The accelerometer is used to collect the acceleration of the flexible component 20, and the gyroscope is used to collect the attitude of the flexible component 20. The control module 50 is used to determine whether the flexible component 20 is in a sitting or moving posture based on the acceleration and attitude.

[0085] Attitude sensor 40 is a device used to detect the motion state and orientation of an object. An accelerometer is a sensor that measures the acceleration of an object. Common implementations include microelectromechanical systems (MEMS) accelerometers, which measure acceleration by utilizing the deformation of silicon-based microstructures under stress; or piezoelectric accelerometers, which measure acceleration by utilizing the property of piezoelectric materials generating electrical charges under stress. A gyroscope is a sensor that measures the angular velocity or attitude of an object. For example, a MEMS gyroscope measures angular velocity by detecting the Coriolis force generated when a vibrating structure rotates; a fiber optic gyroscope measures rotation by utilizing optical path difference.

[0086] By mounting both the accelerometer and gyroscope on the flexible component 20, the acquired kinematic data can directly and accurately reflect the actual motion state and attitude changes of the flexible component 20 itself. This avoids measurement errors caused by installation position deviations or mechanical connection gaps, thereby improving the reliability of the data source. The accelerometer and gyroscope can be integrated into the internal structure of the flexible component 20, for example, embedded between flexible material layers; or fixed to the outer surface of the flexible component 20, for example, by bonding or stitching.

[0087] The control module 50 receives acceleration data from the accelerometer and attitude (or angular velocity) data from the gyroscope, performs comprehensive analysis and processing to accurately determine whether the flexible component 20 is currently in a seated or moving posture. As an example, algorithms such as Kalman filtering or complementary filtering can be used to combine the advantages of the accelerometer in providing attitude reference under static conditions with the advantages of the gyroscope in providing angular velocity information under dynamic conditions, eliminating their respective measurement errors and drift, thereby obtaining high-precision and robust attitude estimation. As other examples, machine learning algorithms can also be used to establish an attitude recognition model by training on a large amount of acceleration and attitude data under different postures, enabling intelligent judgment of seated and moving postures.

[0088] Combination Figures 1 to 3 As shown, in some embodiments, the housing 10 is provided with a handle 11.

[0089] When the user needs to transfer the device, he / she can directly grasp the handle 11 to lift the housing 10, thereby moving the non-invasive circulatory device 100 of this application embodiment, thereby reducing the difficulty of moving the non-invasive circulatory device 100.

[0090] Combination Figures 1 to 3 As shown, in some embodiments, the non-invasive circulatory assist device 100 includes a support base 12, a first adjusting rod 13 and a second adjusting rod 14. One end of the first adjusting rod 13 is hinged to the housing 10, and the other end of the first adjusting rod 13 is hinged to the middle part of the support base 12. One end of the second adjusting rod 14 is hinged to the housing 10, and the other end of the second adjusting rod 14 is connected to the end of the support base 12.

[0091] The position of the support base 12 can be adjusted by the first adjusting rod 13 and the second adjusting rod 14, so that the support base 12 can support the housing 10 at a suitable angle and can be placed in a suitable position for storage, thereby reducing the space occupied by the non-invasive circulatory device 100.

[0092] The above description is merely a preferred embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A non-invasive circulatory assist device, characterized in that, include: The housing defines the mounting cavity; A flexible component, connected to the housing and located outside the mounting cavity, A driving element is disposed within the mounting cavity, the driving element is connected to the flexible component, and is configured to execute a first pressure reference or a second pressure reference to drive the flexible component to pressurize or depressurize, wherein the first pressure reference is greater than the second pressure reference. An attitude sensor is disposed on the flexible component and configured to acquire the kinematic attitude of the flexible component; A control module is disposed within the mounting cavity. The attitude sensor and the drive component are both electrically connected to the control module. The control module is configured to control the drive component to execute the first pressure reference when the flexible component is in a seated posture. The control module is also configured to control the drive component to execute the second pressure reference when the flexible component is in a motion posture.

2. The non-invasive circulatory assist device according to claim 1, characterized in that, The flexible component includes multiple flexible airbags, and the non-invasive circulatory device includes multiple control valves. Each control valve is connected to one of the multiple flexible airbags in a corresponding manner. Each control valve is connected to the drive component and electrically connected to the control module. The control module is configured to control the multiple control valves to open or close in a preset order so as to generate pressure waves within the multiple flexible airbags.

3. The non-invasive circulatory assist device according to claim 2, characterized in that, The flexible component includes a calf mount, and the plurality of flexible airbags include a first flexible airbag and a second flexible airbag disposed on the calf mount. The first flexible airbag and the second flexible airbag are configured to be disposed on both sides of the gastrocnemius muscle and can jointly squeeze the gastrocnemius muscle when inflated to drive the gastrocnemius muscle to squeeze the vein.

4. The non-invasive circulatory assist device according to claim 3, characterized in that, The plurality of flexible airbags also include a third flexible airbag and a fourth flexible airbag disposed on the lower leg mounting piece. The third flexible airbag and the fourth flexible airbag are located between the first flexible airbag and the second flexible airbag. The third flexible airbag and the fourth flexible airbag are configured to press against the medial head and the lateral head of the gastrocnemius muscle, respectively, and can drive the gastrocnemius muscle to relax during impact.

5. The non-invasive circulatory assist device according to claim 4, characterized in that, The control module is configured to inflate the first and second flexible airbags via the drive member, while the third and fourth flexible airbags contract. The control module is also configured to inflate the third and fourth flexible airbags via the drive member when the first and second flexible airbags contract.

6. The non-invasive circulatory assist device according to claim 4, characterized in that, The calf mounting component is arranged around the first flexible airbag, the second flexible airbag, the third flexible airbag, and the fourth flexible airbag. The calf mounting component is configured to limit the radial expansion of the first flexible airbag, the second flexible airbag, the third flexible airbag, and the fourth flexible airbag.

7. The non-invasive circulatory assist device according to claim 2, characterized in that, The flexible component includes a thigh mounting piece, and the plurality of flexible airbags include a fifth flexible airbag and a sixth flexible airbag disposed on the thigh mounting piece. The fifth flexible airbag is configured to press against the quadriceps muscle, and the sixth flexible airbag is configured to press against the hamstring muscle. The control module is further configured to inflate the sixth flexible airbag when the fifth flexible airbag is contracted by the drive member, and the control module is further configured to contract the sixth flexible airbag when the fifth flexible airbag is inflated by the drive member.

8. The non-invasive circulatory assist device according to claim 7, characterized in that, The thigh mount is circumferentially disposed outside the fifth and sixth flexible airbags, and the thigh mount is configured to limit the radial expansion of the fifth and sixth flexible airbags.

9. The non-invasive circulatory assist device according to claim 1, characterized in that, The non-invasive circulatory assist device further includes a pressure sensor, which is disposed on the flexible component and electrically connected to the control module; and / or The non-invasive circulatory assist device further includes a power supply assembly, which comprises a battery and a power supply circuit. The drive unit, the attitude sensor, and the control module are all electrically connected to the power supply circuit. The battery is electrically connected to the power supply circuit and is configured to power the drive unit, the attitude sensor, and the control module; and / or, The non-invasive circulatory assist device also includes a hemodynamic detection module electrically connected to the control module, which is used to detect blood flow and blood status.

10. The non-invasive circulatory assist device according to claim 1, characterized in that, The attitude sensor includes an accelerometer and a gyroscope, both of which are located on the flexible component. The accelerometer is used to collect the acceleration of the flexible component, and the gyroscope is used to collect the attitude of the flexible component. The control module is used to determine whether the flexible component is in the sitting posture or the moving posture based on the acceleration and the attitude.

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