Upper limb rehabilitation training device

Abstract

The application relates to the technical field of rehabilitation, in particular to an upper limb rehabilitation training device which comprises a sleeve, an air bag fixedly connected to the inner side of the sleeve, an air pump communicated with the air bag, fixed ends and movable ends respectively at the two ends of the sleeve, a box body fixedly connected to the outer side of the fixed end of the sleeve, a receiving cavity and a control cavity separated by a partition plate in the box body, a receiving opening formed in the side wall of the receiving cavity, a motor fixedly connected to the inner side wall of the receiving cavity, a reel coaxially fixedly connected to the output shaft of the motor, a connecting rod fixedly connected to the side wall of the reel, and the movable end of the sleeve fixedly connected to the side wall of the connecting rod; a controller arranged in the control cavity, and a probe assembly embedded in the inner side of the sleeve. The sleeve is automatically wound and unwound to replace the traditional magic tape fixing, the air bag pressure is automatically adjusted in cooperation with the controller, the probe assembly is integrated to realize real-time monitoring of arterial blood flow, the problems of traditional pressurized sleeves, such as complicated wearing, easy hooking and displacement, and low pressure control precision, are solved, and the single-person convenient wearing, stable and accurate blood flow restriction training is realized.

Description

Technical Field

[0001] This invention relates to the field of rehabilitation technology, and more specifically to an upper limb rehabilitation training device. Background Technology

[0002] In the field of rehabilitation medicine, rehabilitation training for upper limb dysfunction (such as tennis elbow) is crucial for improving patients' limb motor abilities and enhancing their quality of life. Currently, blood flow restriction training (BFR) is commonly used in upper limb rehabilitation training. By applying appropriate pressure to the proximal end of the limb, it reduces arterial blood flow and venous return in the muscles, thereby achieving a muscle strengthening effect similar to high-intensity training under low-load / low-intensity training (such as elbow flexion and extension, wrist flexion and extension / pronation and supination). Blood flow restriction training is particularly suitable for patients undergoing postoperative rehabilitation and those with muscle atrophy. In the rehabilitation of tennis elbow (lateral epicondylitis of the humerus), blood flow restriction training can significantly reduce patients' PRTEE scores, increase the ratio of painless grip strength between the affected and unaffected sides, improve the coordination of elbow flexor and extensor muscle groups, and optimize neuromuscular control.

[0003] In current clinical and rehabilitation settings, the mainstream equipment for blood flow restriction training is the pressure cuff, such as a manual pneumatic tourniquet. This tourniquet mainly consists of a cuff body, an air bladder, a pressure gauge, a connecting tube, an air stop valve, and a deflation valve. The cuff adopts a strip-shaped structure design and is fixed with Velcro. By manually squeezing the air bladder, air is injected into the cuff. The pressure gauge provides feedback and adjusts the cuff pressure to keep it stable within a preset safe range. This restricts blood flow while avoiding excessive pressure on the limb, meeting the basic requirements for blood flow restriction in upper limb rehabilitation training and helping patients achieve muscle activation and functional recovery under low-load training.

[0004] In actual use of manual pneumatic tourniquets, patients often need to repeatedly adjust the cuff position and tightness when wearing it alone. This not only increases the operation time but may also affect the training effect due to improper wearing. Secondly, the cuff relies on Velcro for fixation. When the cuff is wrapped around the limb, the excess Velcro is exposed. During upper limb rehabilitation training, these protruding Velcro are prone to snagging on clothing, which not only interferes with the normal performance of training movements but may also cause the cuff to shift due to pulling, affecting the stability of pressure control and failing to consistently achieve the expected blood flow restriction effect. At the same time, the exposed Velcro may also directly rub against the skin, which can easily cause skin irritation, especially for patients with sensitive skin. Issues such as redness, swelling, and rupture reduce patient comfort during training. Furthermore, manual pneumatic tourniquets require Doppler ultrasound, auscultation, or palpation to measure arterial occlusion pressure to determine the corresponding pressure adjustment value. Doppler ultrasound equipment is expensive, has a cumbersome operation procedure, and demands high levels of expertise from operators, making it difficult to popularize in grassroots rehabilitation settings or home training. Auscultation relies on the operator's auditory judgment, is easily affected by environmental noise and subjective experience, and has significant measurement errors. Palpation relies entirely on tactile perception of the moment the arterial pulsation disappears, making accuracy even more difficult to guarantee. These traditional measurement methods suffer from being complex to operate, inconvenient to promote, or lacking sufficient accuracy to provide reliable data support for training.

[0005] Therefore, the present invention proposes an upper limb rehabilitation training device to solve the above problems. Summary of the Invention

[0006] To address the aforementioned issues, this invention provides an upper limb rehabilitation training device that replaces traditional Velcro fastening with an automatic retractable cuff. It also features a controller to automatically adjust the airbag pressure and an integrated probe assembly to monitor arterial blood flow in real time. This solves the problems of traditional pressure cuffs being cumbersome to wear, prone to snagging and shifting, and having low pressure control accuracy, enabling convenient single-person wear and stable, precise blood flow restriction training.

[0007] To achieve the above objectives, the technical solution of the present invention is as follows: An upper limb rehabilitation training device includes a cuff, an airbag fixedly connected to the inner side of the cuff, an air pump connected to the airbag, a fixed end and a movable end at both ends of the cuff, a box fixedly connected to the outer side of the fixed end of the cuff, the box being divided into a storage cavity and a control cavity by a partition, a storage opening corresponding to the cuff on the side wall of the storage cavity, a motor fixedly connected to the inner side wall of the storage cavity, a scroll fixedly connected to the output shaft of the motor along the width direction of the cuff, a connecting rod fixedly connected to the side wall of the scroll, the connecting rod being parallel to the scroll, the end of the scroll away from the motor being rotatably connected to the inner side wall of the storage cavity, the movable end of the cuff passing through the storage opening and fixedly connected to the side wall of the connecting rod; a controller is provided in the control cavity, the air pump is located in the control cavity, the air pump and the motor are both electrically connected to the controller, and a probe assembly for detecting arterial blood flow is embedded 8-12cm from the fixed end of the cuff on the inner side of the cuff.

[0008] The technical principle of the above scheme is as follows: During blood flow restriction training, the cuff is passed through the arm and placed over the brachial artery of the upper limb, so that the probe assembly is in contact with the brachial artery. Then, the torque is transmitted to the roller through the motor output shaft, which drives the roller to rotate. The rotation of the roller causes the connecting rod to rotate around the roller. When the roller rotates, it drives the movable end of the cuff to wind up through the connecting rod, so as to realize the storage and release of the cuff. After the cuff is tightened by the rotation of the roller, the air pump delivers air pressure to the air bladder, which inflates and applies pressure to the limb. As the air bladder inflates, the pressure on the brachial artery of the upper limb increases. The probe assembly monitors the blood flow at the brachial artery. When the probe assembly does not detect blood flow at the brachial artery for three consecutive seconds, the air bladder pressure is the blood flow occlusion pressure value of the patient's upper limb (i.e., arterial occlusion pressure). After the arterial occlusion pressure is detected, the cuff pressure is adjusted according to the training needs (e.g., for tennis elbow patients, it is adjusted to 40%-50% of the arterial occlusion pressure) to carry out blood flow restriction training.

[0009] The above approach has the following beneficial effects: 1. This solution uses a roller to retract and extend the cuff, replacing the traditional Velcro fastening method. This makes it easier for a single patient to put on the cuff without repeated adjustments, thus shortening the operation time. 2. This solution controls the output of the air pump through a controller, which can automatically adjust the airbag pressure according to preset parameters, avoiding the errors of traditional manual inflation and ensuring that the training pressure can be kept stable within a safe range. 3. This solution integrates the probe assembly onto the cuff, enabling direct measurement of the patient's arterial occlusion pressure and real-time monitoring of arterial blood flow. It monitors the real-time matching of training pressure and arterial blood flow, ensuring that the pressure during rehabilitation training remains stable.

[0010] Furthermore, the probe assembly includes a base, which is fixedly connected to the side of the airbag closest to the skin, and a piezoelectric crystal is fixedly connected to the side of the base away from the cuff. The surface of the piezoelectric crystal is provided with a coupling layer, and the piezoelectric crystal is signal-connected to the controller.

[0011] Beneficial effects: By using piezoelectric ultrasound technology, the piezoelectric crystal emits and receives ultrasound signals to monitor the hemodynamic parameters of arterial blood vessels. The detected blood flow signals are transmitted to the controller, and the arterial occlusion pressure of the patient is measured by arterial blood flow parameters, providing data support for subsequent training pressure. At the same time, arterial blood flow is monitored in real time during training to avoid excessive pressure during training and causing damage.

[0012] Furthermore, a waterproof protective layer is provided on the surface of the coupling layer, with a thickness of 0.1-0.3mm, and the waterproof protective layer is made of polyurethane film.

[0013] Beneficial effects: The polyurethane film has good waterproof performance and biocompatibility, which can protect the piezoelectric chip from the corrosion of liquids such as sweat and water stains, and extend the service life of the probe assembly; at the same time, the acoustic impedance of the polyurethane film is close to that of human tissue, which will not affect the ultrasound transmittance, ensuring that the probe assembly can accurately detect arterial blood flow.

[0014] Furthermore, a wedge-shaped block is fixedly connected to the top of the storage opening along its length. The inclined surface of the wedge-shaped block is lower on the side closer to the storage cavity than on the other side, and the vertical distance between the bottom of the wedge-shaped block and the bottom of the storage opening is set as the sum of the sleeve thickness and twice the thickness of the airbag wall.

[0015] Beneficial effects: The wedge-shaped block guides the cuff smoothly into the storage cavity, while the vertical distance restriction (cuff thickness + 2 times the airbag wall thickness) helps to expel air from the airbag and prevents the cuff from being over-compressed during storage, thus avoiding damage to the airbag.

[0016] Furthermore, the surface of the wedge-shaped block is coated with polytetrafluoroethylene.

[0017] Beneficial effects: By utilizing the low coefficient of friction of the polytetrafluoroethylene coating, the friction between the cuff and the wedge block is reduced, ensuring that the cuff can be easily stored.

[0018] Furthermore, a touch display is fixedly connected to the side of the box away from the cuff, and the touch display is electrically connected to the controller.

[0019] Beneficial effects: Training parameters can be set and real-time data can be viewed through the touch interface, and the controller can adjust the device's operating status according to instructions.

[0020] Furthermore, the touch display is equipped with a transparent protective cover.

[0021] Beneficial effects: The protective cover protects the display screen from external impacts and liquid corrosion without affecting operation and display, while also preventing accidental touches.

[0022] Furthermore, the surface of the scroll is provided with anti-slip texture.

[0023] Beneficial effects: The anti-slip texture increases the friction between the roller and the sleeve, preventing the sleeve from slipping during the winding process and ensuring that the sleeve can be smoothly stored in the storage cavity.

[0024] Furthermore, a pressure sensor is installed at the connection between the air pump and the airbag, and the pressure sensor is connected to the controller signal.

[0025] Beneficial effects: The pressure inside the airbag is monitored in real time by a pressure sensor. Based on the signal fed back by the pressure sensor, the controller controls the inflation and deflation of the air pump to keep the pressure inside the airbag within a suitable range, thereby improving the effectiveness of rehabilitation training.

[0026] Furthermore, the air pump output is equipped with a solenoid valve, which is connected to the controller signal.

[0027] Beneficial effects: By controlling the opening and closing of the solenoid valve through the controller, the backflow of gas inside the airbag is prevented, ensuring stable pressure inside the airbag. Attached Figure Description

[0028] Figure 1 This is an isometric view of the cuff of an embodiment of the upper limb rehabilitation training device of the present invention; Figure 2 This is a side sectional view of the cuff in an embodiment of the upper limb rehabilitation training device of the present invention; Figure 3 This is a front sectional view of the storage cavity in an embodiment of the upper limb rehabilitation training device of the present invention; Figure 4 The appendix to the embodiments of the upper limb rehabilitation training device of the present invention Figure 2 Detailed drawing at point A; Figure 5 The appendix to the embodiments of the upper limb rehabilitation training device of the present invention Figure 2 -Detailed drawing at point B.

[0029] The reference numerals in the accompanying drawings include: 1. Cuff; 2. Airbag; 3. Air pump; 4. Box body; 5. Storage cavity; 6. Control cavity; 7. Storage opening; 8. Motor; 9. Roller; 10. Connecting rod; 11. Base; 12. Piezoelectric crystal; 13. Wedge block; 14. Touch screen display; 15. Protective cover. Detailed Implementation

[0030] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0033] The following detailed description illustrates the specific implementation method: Example 1:

[0034] As attached Figure 1 As shown: An upper limb rehabilitation training device includes a cuff 1 with an airbag 2 attached to the inner side of the cuff 1. Since the traditional cuff 1 relies on Velcro for fixation, the patient needs to repeatedly adjust the position and tightness of the cuff 1 during the wearing process. After adjustment, it is fixed by Velcro. After the cuff 1 is wrapped around the limb and fixed, the excess Velcro will be exposed. During the rehabilitation training, these exposed Velcro are easy to snag on the patient's clothing, which will not only interfere with the training movements, but may also cause the cuff 1 to shift due to the clothing snagging, thereby causing the pressure position of the cuff 1 to shift, reducing the stability and accuracy of blood flow restriction, and affecting the training effect. To facilitate the patient's wearing of cuff 1 and prevent cuff 1 from shifting due to clothing snagging, thereby improving the stability of blood flow restriction, as shown in the attached... Figure 1 Appendix Figure 2 Appendix Figure 3 and attached Figure 4As shown, airbag 2 is connected to air pump 3. Air pump 3 has an output valve and a pressure sensor at the connection point between air pump 3 and airbag 2. The cuff 1 has a fixed end and a movable end at its two ends. A box 4 is glued to the outside of the fixed end of the cuff 1. The box 4 is divided into a storage cavity 5 and a control cavity 6 by a partition. The side wall of the storage cavity 5 has a storage opening 7 corresponding to the cuff 1. A motor 8 is fixedly connected to the inner wall of the storage cavity 5 by bolts. A scroll 9, which runs along the width of the cuff 1, is coaxially welded to the output shaft of the motor 8. (The surface of the scroll 9 has anti-slip texture to increase the friction between the scroll 9 and the cuff 1.) Friction prevents the cuff 1 from slipping during winding. A connecting rod 10 is bolted to the side wall of the roller 9. The connecting rod 10 is parallel to the roller 9. The end of the roller 9 away from the motor 8 is rotatably connected to the inner wall of the storage cavity 5. The movable end of the cuff 1 passes through the storage opening 7 and is bonded to the side wall of the connecting rod 10. A controller is provided in the control cavity 6. The air pump 3 is located in the control cavity 6. The solenoid valve, pressure sensor, air pump 3 and motor 8 are all electrically connected to the controller. The preferred models of the air pump 3, pressure sensor, solenoid valve, motor 8 and controller are SKOOCOM SC3201PM air pump 3, Consensic CPS610 pressure sensor, Burkert 2852 solenoid valve, ZHAOWEI PD010010-46 miniature DC gear motor 8 and STMicroelectronics (ST) STM32F4. A probe assembly for detecting arterial blood flow is embedded 8-12cm from the fixed end of the cuff 1 on the inner side of the cuff 1. As attached Figure 2 and attached Figure 5 As shown, the probe assembly includes a base 11, which is bonded to the side of the airbag 2 closest to the skin. A piezoelectric crystal 12 is bonded to the side of the base 11 furthest from the cuff 1. The piezoelectric crystal 12 is connected to the controller signal. The preferred model of the piezoelectric crystal 12 is a Boston Piezo Optics blood flow crystal. A coupling layer is provided on the surface of the piezoelectric crystal 12, and a waterproof protective layer is provided on the surface of the coupling layer. The thickness of the waterproof protective layer is 0.1-0.3mm, and the waterproof protective layer is made of polyurethane film. A touch display 14 is fixedly connected to the side of the box 4 away from the cuff 1 by bolts. The touch display 14 is electrically connected to the controller. The preferred model of the touch display 14 is Avalue HID-2100.

[0035] The specific implementation process is as follows: Before the patient begins upper limb rehabilitation training, the cuff 1 is first put on the arm, then the piezoelectric chip 12 is aligned with the brachial artery and pressure is applied to the piezoelectric chip 12 with the thumb. Then, the patient sends a tightening command to the controller by operating the touch display 14 with the index finger. The controller then sends an electrical signal to the motor 8. After receiving the signal, the output shaft of the motor 8 starts to rotate. The output shaft of the motor 8 controls the rotation of the roller 9. When the roller 9 rotates, it drives the connecting rod 10 to rotate synchronously. The movable end of the cuff 1 is wound around the roller 9 along with the connecting rod 10. As the roller 9 continues to rotate, the piezoelectric chip 12 is pressed by the thumb to keep its position unchanged and the cuff 1 gradually tightens and fits the limb, replacing the traditional Velcro fixing method. This not only allows the patient to easily complete the wearing by one person without repeatedly adjusting the position and tightness, but also avoids the problem of excess Velcro being exposed and hooking clothing, preventing the cuff 1 from shifting during training and ensuring the stability of the blood flow restriction position. Once the cuff 1 is tightened to the appropriate position, the controller stops the motor 8, thus securing the cuff 1 to the limb. Then, the air pump 3 is activated, supplying gas to the airbag 2. The solenoid valve at the output of the air pump 3 remains open under the controller's control, ensuring smooth gas entry into the airbag 2. A pressure sensor at the connection point between the air pump 3 and the airbag 2 monitors the pressure within the airbag 2 in real time and feeds the data back to the controller. As the airbag 2 gradually inflates and applies pressure to the limb, the piezoelectric chip 12 makes close contact with the skin through the coupling layer. The waterproof protective layer outside the coupling layer is made of a 0.1-0.3mm thick polyurethane film, which prevents sweat and water from corroding the piezoelectric chip 12, extending its lifespan. Furthermore, because its acoustic impedance is close to that of human tissue, it does not affect the transmission of ultrasound signals. The piezoelectric chip 12 transmits the detected arterial blood flow signal to the controller in real time. When the controller does not receive a blood flow signal for three consecutive seconds, the pressure value fed back by the pressure sensor is the upper limb blood flow occlusion pressure (i.e., arterial occlusion pressure). After the arterial occlusion pressure test is completed, the patient sets training parameters via the touch display 14. For example, for tennis elbow patients, blood flow restriction training can be performed at 40%-50% of the arterial occlusion pressure. The controller will precisely adjust the inflation volume of the air pump 3 based on the feedback signal from the pressure sensor to stabilize the pressure inside the cuff 2 at the set value. For example, if the patient's arterial occlusion pressure is 100 mmHg, the training pressure is set to 45 mmHg. When the pressure sensor detects that the pressure in the cuff 2 is lower than 45 mmHg, the controller controls the air pump 3 to inflate. When the pressure reaches 45 mmHg, the air pump 3 stops inflating, the solenoid valve closes to prevent gas backflow, and the pressure is maintained. Stable pressure is maintained during training. The pressure sensor continuously monitors the pressure, and the controller immediately adjusts it if fluctuations occur to ensure that the pressure remains within the set range. At the same time, the piezoelectric chip 12 monitors arterial blood flow in real time. If abnormal changes occur in blood flow, the controller will automatically adjust the pressure of the airbag 2 to ensure the safety and effectiveness of the training. The controller can also control the pressure maintenance time during training. For example, if it is necessary to perform elbow flexion and extension exercises for two minutes at 40% of the arterial occlusion pressure, the training time can be preset to 2 minutes. After the training time ends, the controller controls the solenoid valve to open, the gas in the airbag 2 is discharged, and the pressure gradually decreases to the normal level. After the patient completes the training, they send a relaxation command to the controller via the touch display 14. The controller then starts the motor 8 to rotate in the reverse direction, and the roller 9 rotates in the reverse direction as well, releasing the movable end of the cuff 1. The patient can then remove the cuff 1. The training pressure and pressure maintenance time of the entire training process are automatically controlled, making the operation simple. It also avoids the displacement of the cuff 1 caused by the Velcro being exposed and hooked onto clothing, which is a problem with traditional cuffs. This improves the stability and accuracy of blood flow restriction and enhances the rehabilitation training effect.

[0036] A comparison was made between the upper limb rehabilitation training device of Example 1 and a traditional manual pneumatic tourniquet, and the specific experiment is as follows: Experimental Objective: To evaluate the clinical application effects of the upper limb rehabilitation training device described in Embodiment 1 of the present invention (hereinafter referred to as "the device of the present invention") and the traditional manual pneumatic tourniquet in the process of blood flow restriction training (BFR) combined with extracorporeal shock wave therapy for tennis elbow. The focus is on comparing the two devices in terms of the ease of wearing the cuff, the accuracy of pressure control, the stability of the cuff during training, and the auxiliary role in the patient's functional recovery. The aim is to verify the advantages of the device of the present invention in improving the rehabilitation training effect and patient comfort.

[0037] Experimental steps: 1. Case selection criteria (1) Inclusion criteria: Age 18-60 years old, gender not limited.

[0038] A diagnosis of tennis elbow is made if symptoms have lasted for more than 2 weeks, based on the following criteria: positive tenderness at the lateral epicondyle of the humerus; positive Cozen test, Maudsley test and / or Mill test; and a decrease in grip strength of >10% (elbow extension vs. elbow flexion).

[0039] Can understand and actively participate in the training program, and agree to and sign the informed consent form for this clinical study.

[0040] (2) Exclusion criteria: History of ipsilateral shoulder tendinopathy, cervical radiculopathy, rheumatoid arthritis, neurological deficits, radial nerve entrapment, etc. Recent (<6 months) interventional treatment (such as cortisol injection history); I have had lateral epicondylitis of the humerus in the same elbow joint within the past two years; Comorbid severe cardiovascular disease; A history of upper limb orthopedic surgery or deep vein thrombosis within the past 6 months; Body Mass Index (BMI) > 30; History of malignant tumors; The researchers determined that the patients had poor compliance and were unable to complete the study as required. Other contraindications or complications that may affect training.

[0041] (3) Shedding criteria: Patients who voluntarily withdrew from the experiment or experienced severe discomfort during the experiment; Patients may withdraw voluntarily. Each patient has the right to refuse further participation in the study at any time without any reason. The patient's participation will be terminated immediately upon his / her request, and the researcher should investigate the reason for withdrawal and record it in the Case Report Form (CRF).

[0042] 2. Following the case selection criteria, 50 patients diagnosed with tennis elbow were recruited and randomly divided into two groups of 25 each.

[0043] 3. Control group (manual pneumatic tourniquet group): In addition to extracorporeal shock wave therapy and a home exercise program, blood flow restriction training was conducted using a traditional manual pneumatic tourniquet. The cuff was manually secured with Velcro, and the pressure was adjusted by manually squeezing the air bladder and observing the pressure gauge to maintain the pressure within a preset range.

[0044] 4. Experimental Group (Device of the Invention): Based on the same shockwave therapy and home exercise plan, the upper limb rehabilitation training device of Embodiment 1 of the present invention was used for blood flow restriction training. The patient automatically tightened the cuff via a touch screen display, and the device automatically detected the arterial occlusion pressure through the probe assembly. The controller automatically adjusted the airbag pressure according to a preset ratio (40%-50% of the arterial occlusion pressure).

[0045] 5. Training programs for the two groups of patients Both groups received the following general treatments: lateral shockwave therapy on the affected elbow (once a week), soft tissue massage (7-8 minutes per session), a family exercise program (every other day, with adherence recorded), and pain management advice and education.

[0046] Experimental group (BFR-ESWT): BFR training (40-50% arterial occlusion pressure) was performed using an automatic pneumatic tourniquet.

[0047] Phase 1 (0-2 weeks): 1) Elbow flexion and extension (30% 1RM, 4 sets × 30-15-15-15 repetitions). 2) Wrist flexion / extension / pronation / supination (minimum load, VAS score <2 / 10, 3 sets × 10 repetitions). 3) Static stretching of wrist extensor and flexor muscles (3 x 30 seconds).

[0048] Phase 2 (2-4 weeks, provided the patient does not report pain during or after exercise): Based on the first-stage training program, add training programs without blood flow restrictions (such as wall push-ups, elastic band rows, etc.).

[0049] Training parameters: 2 seconds concentric / eccentric, 30 seconds rest between sets, twice a week (30-45 minutes each time) for 4 weeks.

[0050] 6. Record the following indicators for both groups of patients at baseline, 4 weeks after treatment, and at the 8-week follow-up: Primary outcome measures: Numerical pain score (NPRS), PRETEE questionnaire score, painless grip strength (affected side / unaffected side ratio), and Global Recovery Scale (GROC).

[0051] Secondary outcome measure: elbow flexor / extensor isolongitudinal muscle strength.

[0052] Observation indicators: Record the number of times the cuff pressure was adjusted during each training session, the number of training interruptions caused by cuff displacement, and the patient's self-reported wearing comfort and adverse skin reactions.

[0053] Experimental data: PRTEE score (0-100 points) Baseline 54.8 ± 8.2 55.1 ± 7.9 >0.05 4 weeks after treatment 34.5 ± 6.5 23.9 ± 5.8 <0.01 8-week follow-up 32.1 ± 7.0 20.5 ± 6.1 <0.01 Painless grip strength ratio (affected side / unaffected side, %) Baseline 68.5 ± 5.0 67.9 ± 5.3 >0.05 4 weeks after treatment 79.2 ± 6.1 91.5 ± 4.5 <0.01 8-week follow-up 81.0 ± 5.8 93.2 ± 4.0 <0.01 Numerical pain score (NPRS, 0-10) Baseline 6.5 ± 1.2 6.6 ± 1.1 >0.05 4 weeks after treatment 3.8 ± 1.5 2.1 ± 1.0 <0.01 8-week follow-up 3.5 ± 1.6 1.8 ± 0.9 <0.01 Isometric strength of elbow flexors / extensors (Nm) Changes after 4 weeks of treatment +8.5 ± 3.0 +15.2 ± 2.8 <0.01 Cuff displacement rate during training (times / person / week) The entire treatment cycle 0.8 ± 0.3 0.1 ± 0.1 <0.01 The frequency (times / training session) needs to be manually adjusted due to cuff issues. The entire treatment cycle 1.5 ± 0.5 0.1 ± 0.1 <0.01 Incidence of skin discomfort or minor skin damage (%) The entire treatment cycle 20% (5 / 25) 4% (1 / 25) <0.05 Experimental conclusion: Experimental results show that, in the study of blood flow restriction training combined with extracorporeal shock wave therapy for tennis elbow, the upper limb rehabilitation training device in Example 1 of this invention has significant advantages over the traditional manual pneumatic tourniquet.

[0054] Firstly, regarding clinical efficacy, the experimental group showed significantly greater improvements in PRETEE score, painless grip strength ratio, and NPRS pain score at 4 weeks and 8 weeks follow-up compared to the control group (P<0.01), reaching clinically significant thresholds. This indicates that the device of this invention, through precise and stable control of blood flow restriction pressure, can more effectively promote tendon repair and functional reconstruction, and its combined therapeutic effect is superior to that of traditional manually controlled tourniquets.

[0055] Secondly, regarding the performance of the device, this invention completely eliminates the drawbacks of traditional Velcro fastening through its automatic winding and storage of the cuff and closed-loop pressure control system. During the experiment, the frequency of cuff adjustment required due to displacement and the incidence of cuff displacement in the experimental group were significantly lower than those in the control group. This ensured the stability of the blood flow restriction position and the accuracy of the pressure, thereby guaranteeing the training effect. In addition, the incidence of skin discomfort in the experimental group was significantly reduced, indicating that the device avoids friction between excess Velcro and the skin, improving the patient's wearing comfort and safety.

[0056] The upper limb rehabilitation training device provided in Embodiment 1 of this invention is superior to the traditional manual pneumatic tourniquet in terms of automation, pressure control precision, and wearing comfort. When applied to the treatment plan of BFR combined with ESWT, it can significantly improve the clinical rehabilitation effect of tennis elbow and has higher clinical application value.

[0057] Example 2: As attached Figure 2 and attached Figure 4 As shown, the difference from Embodiment 1 is that a wedge-shaped block 13 is fixedly connected to the top of the storage opening 7 along its length (the surface of the wedge-shaped block 13 is coated with polytetrafluoroethylene, which reduces the friction between the cuff 1 and the wedge-shaped block 13 by utilizing its low coefficient of friction, ensuring that the cuff 1 can be stored smoothly). The inclined surface of the wedge-shaped block 13 is lower on the side closer to the storage cavity 5 than on the other side, and the vertical distance between the bottom of the wedge-shaped block 13 and the bottom of the storage opening 7 is set to the sum of the thickness of the cuff 1 and twice the wall thickness of the airbag 2. The inclined surface of the wedge-shaped block 13 guides the cuff 1 to enter the storage cavity 5 smoothly, and the vertical distance (the thickness of the cuff 1 + twice the wall thickness of the airbag 2) is used to limit the air in the airbag 2, while avoiding excessive compression of the cuff 1 during storage, which could damage the airbag 2.

[0058] Example 3: As attached Figure 2 As shown, the difference from Embodiment 2 is that the touch display 14 is provided with a transparent protective cover 15. The protective cover 15 prevents accidental touch of the touch display 14 during training from changing the training parameters. At the same time, it protects the touch display 14 from external impact and liquid corrosion without affecting operation and display.

[0059] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. An upper limb rehabilitation training device, comprising a cuff (1), wherein an airbag (2) is fixedly connected to the inner side of the cuff (1), characterized in that: The airbag (2) is connected to the air pump (3). The two ends of the cuff (1) are a fixed end and a movable end, respectively. The outer side of the fixed end of the cuff (1) is fixedly connected to the box (4). The box (4) is divided into a storage cavity (5) and a control cavity (6) by a partition. The side wall of the storage cavity (5) has a storage opening (7) corresponding to the cuff (1). The inner side wall of the storage cavity (5) is fixedly connected to the motor (8). The output shaft of the motor (8) is coaxially fixedly connected to the roller (9) arranged along the width direction of the cuff (1). The side wall of the roller (9) is fixedly connected to the connecting rod. (10) The connecting rod (10) is set parallel to the roller (9). The end of the roller (9) away from the motor (8) is rotatably connected to the inner wall of the storage cavity (5). The movable end of the cuff (1) passes through the storage opening (7) and is fixedly connected to the side wall of the connecting rod (10). The control cavity (6) is equipped with a controller. The air pump (3) is located in the control cavity (6). The air pump (3) and the motor (8) are electrically connected to the controller. The inner side of the cuff (1) is embedded with a probe assembly for detecting arterial blood flow at a distance of 8-12cm from the fixed end of the cuff (1).

2. The upper limb rehabilitation training device according to claim 1, characterized in that: The probe assembly includes a base (11), which is fixedly connected to the side of the airbag (2) near the skin. A piezoelectric chip (12) is fixedly connected to the side of the base (11) away from the cuff (1). A coupling layer is provided on the surface of the piezoelectric chip (12), and the piezoelectric chip (12) is connected to the controller signal.

3. The upper limb rehabilitation training device according to claim 2, characterized in that: The coupling layer surface is provided with a waterproof protective layer with a thickness of 0.1-0.3mm, and the waterproof protective layer is made of polyurethane film.

4. The upper limb rehabilitation training device according to claim 1, characterized in that: A wedge block (13) is fixedly connected to the top of the storage opening (7) along its length direction. The inclined surface of the wedge block (13) is lower on the side closer to the storage cavity (5) than on the other side. The vertical distance between the bottom of the wedge block (13) and the bottom of the storage opening (7) is set as the sum of the thickness of the sleeve (1) and twice the wall thickness of the airbag (2).

5. The upper limb rehabilitation training device according to claim 4, characterized in that: The surface of the wedge block (13) is coated with polytetrafluoroethylene.

6. The upper limb rehabilitation training device according to claim 1, characterized in that: A touch display (14) is fixedly connected to the side of the box (4) away from the sleeve (1), and the touch display (14) is electrically connected to the controller.

7. The upper limb rehabilitation training device according to claim 6, characterized in that: A transparent protective cover (15) is provided on the touch display (14).

8. The upper limb rehabilitation training device according to claim 1, characterized in that: The surface of the scroll (9) is provided with anti-slip texture.

9. The upper limb rehabilitation training device according to claim 1, characterized in that: A pressure sensor is provided at the connection between the air pump (3) and the air bag (2), and the pressure sensor is connected to the controller signal.

10. The upper limb rehabilitation training device according to claim 9, characterized in that: The air pump (3) has a solenoid valve at its output end, and the solenoid valve is connected to the controller signal.

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