A biomechanically adapted, real-time monitoring of the repair status of the achilles tendon support

Abstract

The application provides a biomechanically adaptive Achilles tendon support system capable of monitoring the repair state, which comprises a negative Poisson's ratio structure body in a sheet shape with microneedles, which is used for fixedly adhering to the Achilles tendon and covering the gap of the Achilles tendon end. When the Achilles tendon is stretched, the cross-sectional area of the Achilles tendon is increased, and through the design of the structural parameters, the Achilles tendon support system of the application is elongated along the length direction of the Achilles tendon and is circumferentially deformed and expanded with the stretching of the Achilles tendon, so as to be matched with the deformation of the cross-sectional area of the Achilles tendon. The negative Poisson's ratio structure body is a patch structure, which has good adhesion to the Achilles tendon. The Achilles tendon support system is provided with a biosensor, the sensor can sense the deformation response of the Achilles tendon tissue, and the repair state thereof is monitored. The Achilles tendon support system can be self-degraded by introducing degradable materials, and will not remain in the body as a foreign body.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of medical devices, in particular to a biomechanically adaptive Achilles tendon support system that can monitor the repair status. BACKGROUND

[0002] The Achilles tendon is the most easily injured tendon in the human body. Epidemiological statistics show that Achilles tendon rupture accounts for about 40% of all tendon ruptures. In recent years, the incidence of Achilles tendon rupture is about 11 / 100,000 to 40 / 100,000, and more than 60% of Achilles tendon ruptures are related to sports. In particular, 75% of Achilles tendon ruptures occur in male athletes aged 30 to 40, which may be related to long-term overuse and age-related decrease in mechanical strength of the Achilles tendon. Therefore, for specific groups such as athletes, repair of Achilles tendon rupture is crucial.

[0003] For complete rupture of the Achilles tendon, the related art provides a scheme of surgically suturing the Achilles tendon. However, the technical scheme of surgical suture often has the problem of scar formation during the repair process of the Achilles tendon section after surgery, and a larger scar may form after surgery, affecting the appearance and function. There is also a scheme in the related art in which a cylinder is provided around the Achilles tendon. However, the Achilles tendon is a negative Poisson's ratio structure, and when the Achilles tendon is stretched, its cross-section will increase, so that the cylinder and the Achilles tendon have poor compatibility, and the cylinder has poor fit, which is not conducive to accelerating the repair of the Achilles tendon.

[0004] In view of the above, the present application is proposed. SUMMARY

[0005] To solve one of the above technical problems, the present application provides a biomechanically adaptive Achilles tendon support system that can monitor the repair status.

[0006] The present application adopts the following technical solutions:

[0007] A biomechanically adaptive Achilles tendon support system that can monitor the repair status, comprising: a negative Poisson's ratio structure, the negative Poisson's ratio structure being in the shape of a sheet, the negative Poisson's ratio structure being used to be fixedly attached to the Achilles tendon and cover the gap of the Achilles tendon end.

[0008] Optionally, the Achilles tendon support system comprises a plurality of needle bodies, each of the needle bodies being fixedly arranged on the negative Poisson's ratio structure, and the needle bodies being capable of being inserted into the Achilles tendon.

[0009] Optionally, the surface of the needle body has a drug coating.

[0010] Alternatively, the needle body has a containing cavity for storing drugs.

[0011] Optionally, the negative Poisson's ratio structure has an implanted state in which the negative Poisson's ratio structure encloses a wrapped cavity.

[0012] Optionally, the Achilles tendon support system comprises a detector arranged on the negative Poisson's ratio structure, the detector being used to monitor the healing of the Achilles tendon in real time.

[0013] Optionally, the detector comprises a power module, a thin film resistance sensor and a first wireless module.

[0014] The power module, the thin film resistance sensor and the first wireless module are arranged on the negative Poisson's ratio structure.

[0015] The thin film resistance sensor deforms with the negative Poisson's ratio structure, and the resistance of the thin film resistance sensor changes accordingly with the deformation of the negative Poisson's ratio structure.

[0016] The power module is electrically connected to the thin film resistance sensor and the first wireless module, and the first wireless module is connected to the thin film resistance sensor and used to output data of the thin film resistance sensor.

[0017] Optionally, the detector comprises a standard resistance and a detection circuit.

[0018] The power module, the first wireless module, the thin film resistance sensor and the standard resistance are all electrically connected to the detection circuit, and the standard resistance and the thin film resistance sensor are connected in series.

[0019] The first wireless module and the thin film resistance sensor are connected in parallel and used to output a voltage of the thin film resistance sensor.

[0020] The resistance of the thin film resistance sensor can be determined according to the voltage of the thin film resistance sensor, the resistance value of the standard resistance and the output voltage of the power module.

[0021] Optionally, the power module comprises a piezoelectric elastomer connected to the negative Poisson's ratio structure, the piezoelectric elastomer deforms with the negative Poisson's ratio structure and generates a piezoelectric potential, and the piezoelectric elastomer is electrically connected to the detection circuit.

[0022] Optionally, the power module further comprises a rectifier bridge, a filter capacitor and a voltage stabilizer.

[0023] The rectifier bridge is electrically connected to the piezoelectric elastomer, the filter capacitor is connected to the rectifier bridge, and the voltage stabilizer is electrically connected to the filter capacitor.

[0024] The detection circuit is electrically connected to the voltage stabilizer.

[0025] Optionally, the Achilles tendon support system comprises an external machine, the external machine having a second wireless module and a processor;

[0026] The second wireless module and the processor are electrically connected, and the second wireless module can wirelessly communicate with the first wireless module;

[0027] The processor can calculate the resistance value of the thin-film resistance sensor according to the voltage signal of the thin-film resistance sensor output by the first wireless module, and determine the tensile data of the Achilles tendon cross section according to the resistance value.

[0028] By adopting the above technical solutions, the application has the following intended effects:

[0029] The Achilles tendon support system provided by the application adopts a negative Poisson's ratio structure, which is elongated along the length direction of the Achilles tendon and is expanded and deformed in the circumferential direction with the stretching of the Achilles tendon, so as to match the change of the cross-sectional area of the Achilles tendon. The negative Poisson's ratio structure of the application is in the form of a sheet with a small thickness, that is, a patch structure, which has good adhesion to the Achilles tendon and is beneficial to the repair of the Achilles tendon.

[0030] The specific embodiments of the application will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0031] The accompanying drawings, which are part of the present application, serve to provide a further understanding of the application, and the schematic embodiments of the application and the descriptions thereof serve to explain the application, but do not constitute an improper limitation on the application. Obviously, the accompanying drawings described below are only some embodiments, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings. In the drawings:

[0032] Figure 1 A schematic diagram showing the implantation of the biomechanically adapted Achilles tendon support system provided by the embodiment of the present disclosure into a human body;

[0033] Figure 2 A schematic diagram showing the biomechanically adapted Achilles tendon support system provided by the embodiment of the present disclosure;

[0034] Figure 3 A schematic diagram showing the cooperation structure of the thin-film resistance sensor, the NFC module and the packaging layer of the biomechanically adapted Achilles tendon support system provided by the embodiment of the present disclosure;

[0035] Figure 4 A schematic diagram showing the principle of the biomechanically adapted Achilles tendon support system provided by the embodiment of the present disclosure.

[0036] In the figure: 1, negative Poisson's ratio structure; 11, needle body; 2, power module; 3, thin film resistance sensor; 4, packaging layer; 5, NFC module; 6, Achilles tendon.

[0037] It should be noted that these drawings and written descriptions are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments will be described clearly and completely below with reference to the drawings in the embodiments of the present application. The following embodiments are used to illustrate the present application, but not to limit the scope of the present application.

[0039] In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or components referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0040] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0041] Reference Figures 1 to 4 As shown in the figure, the present application provides an Achilles tendon support system which is biomechanically adapted and can monitor the repair state, comprising: a negative Poisson's ratio structure 1, the negative Poisson's ratio structure 1 is sheet-shaped, and the negative Poisson's ratio structure 1 is used for being fixedly attached to the Achilles tendon 6 and covering the gap of the Achilles tendon 6.

[0042] The Achilles tendon support system provided by the present application adopts the negative Poisson's ratio structure 1, which is elongated along the length direction of the Achilles tendon 6 when the Achilles tendon 6 is stretched, and is expanded and deformed in the circumferential direction when the Achilles tendon 6 is stretched, which matches the change of the cross-sectional area of the Achilles tendon 6. The negative Poisson's ratio structure 1 of the present application is sheet-shaped, with small thickness, and is a patch structure, which has good attachment to the Achilles tendon 6 and is beneficial to the rehabilitation of the Achilles tendon 6.

[0043] In some possible embodiments, the negative Poisson's ratio structure 1 is provided with microneedles. Specifically, the Achilles tendon support system comprises a plurality of needle bodies 11, each of which is fixedly arranged on the negative Poisson's ratio structure 1 and can be inserted into the Achilles tendon 6. The needle body 11 can be integrated with the negative Poisson's ratio structure 1. In comparison with the scheme of suturing the Achilles tendon 6, the negative Poisson's ratio structure 1 and the Achilles tendon are connected by microneedles in the embodiments of the present application, and no serious scar formation occurs in the process of repairing the Achilles tendon section, and the Achilles tendon section is aesthetically pleasing and has better function. The negative Poisson's ratio structure 1 can be provided with a large number of needle bodies 11 on one side in the thickness direction to be inserted into the Achilles tendon 6, so as to realize the close connection between the negative Poisson's ratio structure 1 and the Achilles tendon 6. By reasonably setting the size such as the density, length and diameter of the needle body 11, the negative Poisson's ratio structure 1 can be reliably and closely assembled with the Achilles tendon 6. The Achilles tendon support system of the present application can be matched with the mechanical properties of the Achilles tendon through the design of structure and material, and can replace the suture operation in the clinic by combining the microneedles and the wrapping design of the present application, so as to realize the mechanical fixation of the Achilles tendon injury / breakage.

[0044] In some possible embodiments, the needle body 11 can be drug-loaded, and the drug can be directly released into the Achilles tendon tissue after the needle body 11 pierces the Achilles tendon 6, so as to promote the recovery of the Achilles tendon 6. The drug can be a growth factor or the like. The embodiments of the present application can realize in-vivo drug release by drug loading of the needle body, which is beneficial to promoting the repair and regeneration of the Achilles tendon tissue.

[0045] For example, the surface of the needle body 11 can be provided with a drug coating, and the drug is attached to the surface of the needle body 11 by infiltration, spraying or piezoelectric inkjet printing technology. When the needle body 11 pierces the skin, the coating is dissolved and released into the Achilles tendon tissue. For another example, the needle body 11 has a containing cavity for storing the drug. The needle body 11 can penetrate the Achilles tendon 6 and realize drug delivery through the internal channel.

[0046] In some possible embodiments, the negative Poisson's ratio structure 1 has an implanted state in which the negative Poisson's ratio structure 1 encloses a wrapping cavity. The wrapping cavity can be a closed cylindrical cavity, i.e., the negative Poisson's ratio structure 1 extends around the Achilles tendon 6 to form a cylindrical body. The wrapping cavity can also be an unclosed cylindrical cavity, i.e., the negative Poisson's ratio structure 1 can be an arc-shaped piece attached to the Achilles tendon 6, and the two ends of the negative Poisson's ratio structure 1 along the circumference of the Achilles tendon are not connected.

[0047] The Achilles tendon has exogenous healing from peripheral tissues and endogenous healing of the Achilles tendon itself. The exogenous healing is mainly participated by circulating cells outside the Achilles tendon or cells from adjacent tissues such as paratendon muscle and epitenon. The collagen fibers of the Achilles tendon healed by the proliferation of epitenon cells are very disordered and cannot fully adapt to the physiological needs of the Achilles tendon. Excessive deposition of collagen matrix is the main cause of adhesion of the Achilles tendon to the surrounding tissues. The endogenous healing is completed by fibroblasts from the parenchyma, the surface membrane or the endotenon of the Achilles tendon. Through the self-healing way of the division and proliferation of the intrinsic cells of the Achilles tendon and the secretion of collagen, the collagen fibers secreted by the endotenon cells are more mature and arranged more regularly, and the direction is consistent with the original fiber direction of the Achilles tendon cells, and they are interpenetrated to form a firm connection. Therefore, promoting endogenous healing and inhibiting exogenous healing is an important way to reduce the adhesion of the Achilles tendon.

[0048] After the Achilles tendon is damaged or operated, the Achilles tendon is prone to adhesion, that is, the Achilles tendon is adhered to the surrounding tissues, which further affects the function of the muscle innervated by the Achilles tendon. The main manifestations are pain at the affected site and joint movement dysfunction, which is a common complication after Achilles tendon surgery. The occurrence of Achilles tendon adhesion is closely related to the healing process of the Achilles tendon. During the repair of the Achilles tendon injury, undifferentiated mesenchymal cells gradually differentiate into epitenon cells on the surface and intrinsic Achilles tendon cells. The formation of adhesion is mainly the result of the imbalance between endogenous healing factors and exogenous healing factors. Endogenous healing can prevent Achilles tendon adhesion, while exogenous healing inevitably leads to Achilles tendon adhesion because exogenous healing involves the generation of new granulation tissue on the fracture surface of the Achilles tendon by the subcutaneous tissue and synovial membrane of the Achilles tendon, the storage of collagen protein by the capillary into the granulation tissue of the Achilles tendon fracture surface, and the generation of collagen fibers, and finally the formation of scar tissue. In addition, the destruction of the blood supply and integrity of the Achilles tendon and the inflammatory reaction of the peritendon tissue are also important reasons for the formation of Achilles tendon adhesion.

[0049] Exogenous healing is fast, and the fibers are numerous and disordered, which is easy to produce scar. Endogenous healing is slow, and there is almost no difference between the fibers after healing and the fibers before injury, that is, excessive exogenous healing is easy to lead to the production of scar, so the proportion of exogenous healing and endogenous healing should be controlled. The negative Poisson's ratio structure 1 of the application is arranged outside the Achilles tendon 6, which can effectively reduce the proportion of exogenous healing and effectively reduce the production of scar.

[0050] In some possible embodiments, the Achilles tendon support system comprises a detector arranged on the negative Poisson's ratio structure 1, which is used to monitor the tensile data of the Achilles tendon 6 section in real time, i.e., to monitor the healing of the Achilles tendon in real time. The detector is arranged on the negative Poisson's ratio structure 1, i.e., the detector is located inside the human body, and the detection result is relatively accurate. By monitoring the tensile condition of the Achilles tendon 6 section, the repair effect of the Achilles tendon 6, i.e., the healing of the Achilles tendon can be evaluated. The Achilles tendon support system of the embodiments of the present application can perceive the deformation response of the Achilles tendon tissue by introducing a biosensor (detector), and realize the monitoring of the repair state thereof.

[0051] A biocompatible detector can be introduced on the negative Poisson's ratio structure 1, so that the detector can be attached on the negative Poisson's ratio structure 1 or the Achilles tendon 6 section to monitor the tensile condition of the section, such as strain data, in the repair process of the Achilles tendon 6 in real time, i.e., to reflect the soft and hard conditions of the tissue. Since the introduction of a battery and a wire will greatly reduce the biocompatibility of the negative Poisson's ratio structure 1, increase the volume of the detector, and increase the contact area between the detector and the tissue, a series of safety hazards will be caused, and a secondary surgery is required to remove the device subsequently, therefore, the embodiments of the present application select to use a detector without a battery and wireless transmission.

[0052] Specifically, the detector comprises a power module 2, a thin film resistance sensor 3, and a first wireless module. The power module 2 is not a battery for storing electric energy. The power module 2, the thin film resistance sensor 3, and the first wireless module are all arranged on the negative Poisson's ratio structure 1. The thin film resistance sensor 3 deforms with the negative Poisson's ratio structure 1. The resistance value of the thin film resistance sensor 3 changes correspondingly with the deformation of the negative Poisson's ratio structure 1. The power module 2 is electrically connected to the thin film resistance sensor 3 and the first wireless module. The first wireless module is connected to the thin film resistance sensor 3 and is used to output the data of the thin film resistance sensor 3. The tensile data of the Achilles tendon 6 section can be obtained through the data, and the data can be used to represent the healing of the Achilles tendon. The tensile condition of the Achilles tendon section, i.e., the relative strain at the section, can be obtained through the change of the resistance value of the thin film resistance sensor 3. The healing of the Achilles tendon can be monitored in real time through the relative strain-time curve at the Achilles tendon section. The maximum relative strain and the change rate of the relative strain in a period of time can reflect the mechanical properties of the Achilles tendon.

[0053] The thin film resistance sensor 3 can be composed of a stretchable film that can detect the deformation of the surface of the contact material, and can detect the deformation of the contact surface. The thin film resistance sensor 3 can be a strain resistance sensor, which is made of a base layer surface sprayed with gold. Au has unique advantages of ultra-high conductivity and high Young's modulus, and becomes the electrode of the resistance strain sensor. Its sensing principle is based on the micro-crack mechanism. When the rigid micro-pattern gold film is subjected to slight strain, even if the strain is less than 1%, cracks will appear and significant resistance changes will occur. When metal is used as an electrode applied to a strain sensor, the measurement principle is the resistance strain effect. When an external force acts on the metal, the metal will deform, and the size of the deformation directly leads to a change in resistance. The calculation formula of the resistance strain effect is as follows: R = pL / S, R is the output resistance of the strain electrode, p is the resistivity of the conductor, L is the length of the conductor, and S is the cross-sectional area of the conductor. In practical application, when the metal strain gauge is subjected to tension, its cross-sectional area S decreases, and L increases accordingly, and the resistance increases. At the same time, with the occurrence of strain, cracks gradually appear on the surface of the rigid micro-pattern gold film, and the conductive path on the surface begins to break. The greater the tension, the more cracks, and the more breaks. When the crack appears, the top of the crack breaks first, the vertical distance between the conductive layer at the bottom of the crack and the base material decreases, and at the same time, the contact area at the bottom of the crack decreases, i.e. the cross-sectional area decreases, resulting in a decrease in the conductive path in the sensor conductive material, and thus the output resistance of the sensor increases. The resistance value of the resistance sensor can be approximately equal to the resistance value of the thin film made of the base layer surface sprayed with gold, and the resistance value of the gold film is greatly affected by the degree of surface stretching due to the micro-crack mechanism. Therefore, the stretching degree of the contact surface or the negative Poisson's ratio structure 1 can be reflected by the ratio of the change in resistance value AR to the resistance value R in the initial state.

[0054] The thin film resistance sensor 3 can directly contact the Achilles tendon section to directly monitor the Achilles tendon stretching data, and the thin film resistance sensor 3 can be connected only to the negative Poisson's ratio structure 1 to monitor the local deformation of the negative Poisson's ratio structure 1, thereby indirectly determining the stretching deformation data of the Achilles tendon at the corresponding position.

[0055] The thin film resistance sensor 3 can be arranged on any side of the negative Poisson's ratio structure 1 in the thickness direction. When the thin film resistance sensor 3 is located on the side of the negative Poisson's ratio structure 1 away from the Achilles tendon 6, the thin film resistance sensor 3 will not interfere with the needle body 11. When the thin film resistance sensor 3 is located on the inner side of the negative Poisson's ratio structure 1, i.e. on the side facing the Achilles tendon 6, the part of the negative Poisson's ratio structure 1 where the thin film resistance sensor 3 is arranged can not be provided with the needle body 11, thereby facilitating the arrangement of the thin film resistance sensor 3.

[0056] In some possible embodiments, the negative Poisson's ratio structure 1 can have more hollowed-out areas, which can facilitate the transmission of nutrients from the surrounding tissue of the Achilles tendon 6 to the Achilles tendon 6. The negative Poisson's ratio structure 1 is composed of a plurality of repeated sub-units, each of which is attached to a different surface of the Achilles tendon 6, and the deformation of each sub-unit can reflect the deformation of the corresponding part of the Achilles tendon 6. The thin-film resistance sensor 3 can be connected to one or more sub-units to sense the deformation of the corresponding sub-unit. The thin-film resistance sensor 3 can be arranged on a sub-unit close to the cross section of the Achilles tendon 6 to sense the tensile deformation data at the cross section of the Achilles tendon 6.

[0057] In some possible embodiments, the negative Poisson's ratio structure 1 can have more hollowed-out areas, which can facilitate the transmission of nutrients from the surrounding tissue of the Achilles tendon 6 to the Achilles tendon 6. The negative Poisson's ratio structure 1 is composed of a plurality of repeated sub-units, each of which is attached to a different surface of the Achilles tendon 6, and the deformation of each sub-unit can reflect the deformation of the corresponding part of the Achilles tendon 6. The thin-film resistance sensor 3 can be connected to one or more sub-units to sense the deformation of the corresponding sub-unit. The thin-film resistance sensor 3 can be arranged on a sub-unit close to the cross section of the Achilles tendon 6 to sense the tensile deformation data at the cross section of the Achilles tendon 6. Figure 4 As shown in the figure, the detector includes a standard resistance and a detection circuit, the power module 2, the first wireless module (which can be an NFC module), the thin-film resistance sensor 3, and the standard resistance are all electrically connected to the detection circuit, the standard resistance and the thin-film resistance sensor 3 are connected in series, the first wireless module and the thin-film resistance sensor 3 are connected in parallel, and the first wireless module is used to output the voltage of the thin-film resistance sensor 3, wherein the resistance value of the standard resistance is a known value, the output voltage of the power module 2 is a constant value, and the resistance of the thin-film resistance sensor 3 can be determined according to the voltage of the thin-film resistance sensor 3, the resistance value of the standard resistance, and the output voltage of the power module 2. The stretching degree of the contact surface or the negative Poisson's ratio structure 1 can be reflected by the ratio ΔR / R of the change amount ΔR of the resistance value of the thin-film resistance sensor 3 to the resistance value R in the initial state. The negative Poisson's ratio structure 1 has good adhesion to the Achilles tendon 6 of the human body, and the stretching degree thereof can reflect the tensile data of the cross section of the Achilles tendon 6.

[0058] In some possible embodiments, the power module 2 includes a piezoelectric elastomer, and the piezoelectric elastomer can provide electric energy to power each module of the detector. Specifically, the piezoelectric elastomer is connected to the negative Poisson's ratio structure 1, the piezoelectric elastomer deforms along with the negative Poisson's ratio structure 1 and generates a piezoelectric potential, and the piezoelectric elastomer is electrically connected to the detection circuit. In the embodiments of the present application, instead of implanting a battery into the human body, the piezoelectric elastomer on the negative Poisson's ratio structure 1 is used to generate an electric potential, thereby improving the biocompatibility of the Achilles tendon support system. When the piezoelectric elastomer is deformed by an external force in a certain direction, polarization occurs inside and a piezoelectric potential is generated, thereby powering the detection circuit.

[0059] It should be noted that the thin-film resistance sensor and the NFC module 5 can be packaged in the packaging layer 4, thereby simplifying the structure. The packaging layer 4 can be connected to the negative Poisson's ratio structure 1, the thin-film resistance sensor is connected to the packaging layer 4, the packaging layer 4 has elasticity, and when the packaging layer 4 deforms along with the negative Poisson's ratio structure 1, the thin-film resistance sensor 3 deforms along with the negative Poisson's ratio structure 1, thereby changing the resistance value.

[0060] The first wireless module can adopt short-distance wireless communication technology, which allows wireless data exchange between electronic devices at very close distances, usually a few centimeters. For example, the first wireless module can be an NFC module 5. The embodiments of the present application do not need to design an NFC module 5 separately. The NFC module 5 already has a very mature commercial model and design. It only needs to be connected with the signal piece (thin film resistance sensor 3) to be measured.

[0061] In some possible embodiments, referring to Figure 4 As shown, the power module 2 further includes a rectifier bridge, a filter capacitor, and a voltage stabilizer. The rectifier bridge is electrically connected to the piezoelectric elastomer. The filter capacitor is connected to the rectifier bridge. The voltage stabilizer is electrically connected to the filter capacitor. The detection circuit is electrically connected to the voltage stabilizer.

[0062] The piezoelectric elastomer is the power supply part of the circuit, which can generate alternating current during the movement of the negative Poisson's ratio structure 1. The rectifier bridge is used to convert alternating current into direct current. The rectifier bridge is usually composed of four diodes and can be full-wave or half-wave rectification. The filter capacitor is connected to the output end of the rectifier bridge and is used to smooth the direct current and reduce the alternating component. The voltage stabilizer is connected after the filter capacitor and is used to stabilize the direct current voltage. The thin film resistance sensor 3 is connected to the output end of the voltage stabilizer. The standard resistance is connected in series with the thin film resistance sensor 3. The standard resistance and the thin film resistance sensor 3 constitute a voltage divider for measuring the resistance value of the thin film resistance sensor 3.

[0063] Specifically, the piezoelectric elastomer can generate electric energy through the reciprocating movement of the Achilles tendon 6. The electrode layer on the piezoelectric elastomer can collect the electric energy generated by the piezoelectric elastomer. The filter circuit can convert the alternating current generated by the piezoelectric elastomer into direct current. The voltage stabilizer can obtain stable direct current. The direct current voltage acts on the thin film resistance sensor 3 and a standard resistance. Through the resistance voltage division effect, only the voltage division of the thin film resistance sensor 3 is needed to obtain the resistance value of the thin film resistance sensor 3. Therefore, in the embodiments of the present application, the thin film resistance sensor 3 is combined with the NFC wireless module, and the resistance value output of the thin film resistance sensor 3 is finally measured. The image of ΔR / R0 and time t, i.e., the strain-time graph, can be drawn, which can reflect the soft and hard conditions of the tissue.

[0064] In some possible embodiments, the Achilles tendon support system comprises an external machine which does not need to be implanted into the human body, the external machine is located outside the human body, the external machine has a second wireless module and a processor, the second wireless module and the processor are electrically connected, the second wireless module can wirelessly communicate with the first wireless module, the second wireless module can be an NFC reader, and the voltage data output by the NFC module 5 can be obtained. The processor can calculate the resistance value of the thin-film resistance sensor 3 according to the voltage signal of the thin-film resistance sensor 3 output by the first wireless module, and determine the tensile data of the cross section of the Achilles tendon 6 according to the resistance value.

[0065] In some possible embodiments, the structure of the Achilles tendon support system implanted in the human body provided by the embodiments of the present application can be made of degradable materials, so that after the repair of the Achilles tendon tissue, the degradable materials can gradually degrade in the in-vivo environment, the degradation products can be absorbed or excreted out of the body through the metabolic process, and the degradation products will not remain in the body as foreign matter, thereby not causing secondary damage to the human body.

[0066] For example, the NFC wireless module, the piezoelectric elastomer, the sensor of the detector and the negative Poisson's ratio structure 1 used in the intelligent ability bionic support can all be made of degradable materials. The external machine does not need to be made of degradable materials.

[0067] The above only describes the preferred embodiments of the present application and does not limit the present application in any form. Although the present application has been disclosed as above with reference to the preferred embodiments, the present application is not limited thereto. Any person skilled in the art can make some changes or modifications to the above-mentioned technical content without departing from the technical solution of the present application, and the equivalent embodiments with equivalent changes are obtained. Any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present application are still within the scope of the present application.

Claims

1. A biomechanically adapted, repair-status-monitorable Achilles tendon support system, characterized in that: include: A negative Poisson's ratio structure, a detector, and multiple needles. The negative Poisson's ratio structure is sheet-shaped and is used to fit and fix to the Achilles tendon and cover the gap at the end of the Achilles tendon. The negative Poisson's ratio structure has an implanted state. In the implanted state, the negative Poisson's ratio structure encloses a wrapping cavity. Each of the needles is fixedly arranged on the negative Poisson's ratio structure and can be inserted and fixed to the Achilles tendon. The detector is arranged on the negative Poisson's ratio structure and is used to monitor the healing of the Achilles tendon in real time. The detector includes a power module, a thin film resistance sensor, a first wireless module, a standard resistor and a detection circuit, wherein the power module, the first wireless module, the thin film resistance sensor and the standard resistor are all electrically connected to the detection circuit; The power module, the thin film resistance sensor and the first wireless module are all arranged in the negative Poisson's ratio structure; The thin film resistance sensor is deformed along with the negative Poisson's ratio structure, and the resistance value of the thin film resistance sensor changes accordingly with the deformation of the negative Poisson's ratio structure; The power supply module is electrically connected to the thin film resistance sensor and the first wireless module, and the first wireless module is connected to the thin film resistance sensor and is used to output data of the thin film resistance sensor; Wherein, the standard resistor and the thin film resistor sensor are connected in series; The first wireless module is connected in parallel to the thin film resistance sensor and is used to output the voltage of the thin film resistance sensor; The resistance of the thin film resistor sensor can be determined according to the voltage of the thin film resistor sensor, the resistance value of the standard resistor, and the output voltage of the power module.

2. A biomechanically adapted, repair-status-monitorable Achilles tendon stent system according to claim 1, characterized in that: The surface of the needle body is provided with a drug coating; Alternatively, the needle body has a receiving cavity, and the receiving cavity is used to store medicine.

3. The biomechanically adapted, repair-status-monitorable Achilles tendon support system according to claim 1, characterized in that: The power module includes a piezoelectric elastomer, which is connected to the negative Poisson's ratio structure. The piezoelectric elastomer deforms along with the negative Poisson's ratio structure and generates a piezoelectric potential. The piezoelectric elastomer is electrically connected to the detection circuit.

4. A biomechanically adapted, repair-status-monitorable Achilles tendon support system according to claim 3, characterized in that: The power supply module also includes a rectifier bridge, a filter capacitor and a voltage stabilizer; The rectifier bridge is electrically connected to the piezoelectric elastic body, the filter capacitor is connected to the rectifier bridge, and the voltage regulator is electrically connected to the filter capacitor; The detection circuit is electrically connected to the voltage regulator.

5. A biomechanically adapted, repair-status-monitorable Achilles tendon stent system according to any one of claims 1 to 4, characterized in that: The device comprises an external unit having a second wireless module and a processor; The second wireless module is electrically connected to the processor, and the second wireless module can wirelessly communicate with the first wireless module; The processor can calculate the resistance value of the thin film resistance sensor according to the voltage signal of the thin film resistance sensor output by the first wireless module, and determine the stretching data of the Achilles tendon section according to the resistance value.

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