A miniature medical device

Abstract

The present invention provides a micro medical device, the angle formed by the rotating plate of the device can be adjusted, so the position of the electrode can also be adjusted, the electrode can stimulate more muscle parts, thereby enhancing the treatment effect, the selection of the lithium titanium oxide-graphene-lithium titanium oxide composite material of the battery electrode material also greatly increases the specific energy of the battery electrode, and at the same time has stable electrical conduction and electrical output performance, and can maintain a high capacity maintenance rate under the condition of high-power operation, so that the life, stability and safety of the entire device are greatly improved.

Description

[Technical field]

[0001] The present invention relates to the technical field of medical equipment, and in particular to a micro medical equipment. [Background technology]

[0002] The Achilles tendon is composed of band-like tendon fibers that connect the calf muscles to the heel bone. Tension is transmitted to the Achilles tendon through muscle contraction. The cross-section of the Achilles tendon is much smaller than that of muscle tissue, and the unit tension borne by the tissue is much higher than that of muscle. When the Achilles tendon is subjected to excessive pressure in a short period of time, it may be strained, slightly bruised or torn, and then aseptic Achilles tendon inflammation may occur. Physical therapy is one of the most effective methods for treating Achilles tendonitis, among which electrical stimulation therapy is the most effective. Microcurrent is used to stimulate the soleus muscle to relax the Achilles tendon. [Summary of the invention]

[0003] In view of this, an embodiment of the present invention provides a micro medical device.

[0004] A miniature medical device includes an action component implanted at the junction of the Achilles tendon and the soleus muscle, and also includes an external terminal;

[0005] The functional components at least include:

[0006] A fixing seat, comprising a shaft portion and a fixing portion, wherein the fixing portion is fixed to the connection portion between the Achilles tendon and the soleus muscle by a gripper arranged at the periphery of the bottom of the fixing portion;

[0007] A rotating piece, the rotating piece comprising a first rotating piece and a second rotating piece rotatably matched with the shaft portion, the first rotating piece and the second rotating piece are driven by a first micro-driver and a second micro-driver respectively to control the angle between the first rotating piece and the second rotating piece;

[0008] Electrodes, the electrodes comprising a positive electrode and a negative electrode, the positive electrode being distributed at an end of the first rotating sheet, and the negative electrode being distributed at an end of the second rotating sheet;

[0009] A battery, wherein the positive electrode and the negative electrode of the battery are connected to the positive electrode and the negative electrode respectively, and the battery is used to supply power to the entire active component at the same time;

[0010] A controller, the controller is electrically connected to the first micro-driver and the second micro-driver, and is used to receive a control signal from an external terminal to adjust the angle of the first rotating piece and the second rotating piece; the controller is electrically connected to the positive electrode and the negative electrode, and is used to receive a control signal from an external terminal to control the current on and off between the positive electrode and the negative electrode;

[0011] The external terminal at least includes:

[0012] A receiving module, used for receiving input of control information from an operator;

[0013] A processing module, which processes the control information and generates a corresponding control signal;

[0014] The sending module sends the control signal to the controller of the active component.

[0015] Preferably, the first rotating piece is provided with first sleeves on the upper and lower sides of the root and sleeved on the upper and lower sides of the shaft, the second rotating piece is provided with a second sleeve on the root and sleeved in the middle position of the shaft, the second sleeve is located between the two first sleeves, the driving rotor of the first micro-driver is connected to the first sleeve to drive the first rotating piece to rotate, and the driving rotor of the second micro-driver is connected to the second sleeve to drive the second rotating piece to rotate.

[0016] Preferably, the fixing portion of the fixing seat is a solid structure, and the fixing portion is fixed to the connecting part of the Achilles tendon and the soleus muscle by a gripper arranged on the periphery of the bottom of the fixing portion, and is fixed to the target part by a fixing nail.

[0017] Preferably, the device further comprises: the shaft portion of the fixing seat is a hollow structure, and the first micro-driver, the second micro-driver, the battery and the controller are integrated inside the shaft portion.

[0018] Preferably, the first micro-actuator and the second micro-actuator can be micro-stepping motors.

[0019] Preferably, the battery comprises a positive electrode, a negative electrode and a separator, wherein the separator is located between the positive electrode and the negative electrode, the negative electrode comprises a negative electrode current collector, the surface of the negative electrode current collector is coated with a negative electrode material, and the positive electrode comprises a positive electrode current collector, the surface of the positive electrode current collector is coated with a positive electrode material; wherein the negative electrode material is a lithium titanium oxide-graphene-lithium titanium oxide composite material, wherein the composite material is a particle structure formed by a plurality of hammer-shaped structures gathered on a graphene connector, wherein the hammer head of the hammer-shaped structure is divided into spherical lithium titanium oxide particles, and the graphene thin layer distributed on the surface of the lithium titanium oxide particles forms a stone The invention discloses a graphene conductive network, wherein the hammer handle of the hammer-shaped structure is a graphene rod, and the root of the graphene rod is interconnected with the graphene connector, the maximum diameter of the cross section of the graphene rod is smaller than the particle size of the lithium titanium oxide particles, and the maximum diameter of the cross section of the graphene connector is smaller than the particle size of the lithium titanium oxide particles; the positive electrode material comprises lithium manganate, a conductive agent and a binder; the diaphragm is a polypropylene / polyethylene composite film; the electrolyte comprises an organic solvent and a lithium salt, wherein the molar ratio of each component of the organic solvent is ethylene carbonate:propylene carbonate:ethyl methyl carbonate=1:1:1, and the lithium salt is lithium hexafluorophosphate with a concentration of 1M.

[0020] Preferably, the particle size of the lithium titanium oxide particles is 100-500 nm, the thickness of the graphene thin layer is 5-20 nm, and the maximum cross-sectional dimension of the graphene connector is 50-300 nm.

[0021] One of the above technical solutions has the following beneficial effects:

[0022] The present invention provides a micro medical device, the angle formed by the rotating plate of the device can be adjusted, so the position of the electrode can also be adjusted, the electrode can stimulate more muscle parts, thereby enhancing the treatment effect, the selection of lithium titanium oxide-graphene-lithium titanium oxide composite material for battery electrode materials also greatly increases the specific energy of the battery electrode, and at the same time has stable electrical conduction and electrical output performance, and can maintain a high capacity maintenance rate under high-power operation conditions, so that the life, stability and safety of the entire device are greatly improved.

Brief Description of the Drawings

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 A schematic diagram of the structure of a micro medical device according to an embodiment of the present invention;

[0025] Figure 2 Schematic diagram of the structure of a lithium titanium oxide-graphene-lithium titanium oxide composite material according to an embodiment of the present invention;

[0026] Figure 3 A schematic diagram of the circuit principle of a micro medical device according to an embodiment of the present invention;

[0027] Figure 4 FIG. 4 is a schematic diagram of a module of an external terminal according to an embodiment of the present invention. [Specific implementation method]

[0028] In order to better understand the technical solution of the present invention, the embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0029] It should be clear that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The singular forms "a", "said" and "the" used in the embodiments of the present invention and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0031] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0032] Figure 1 A schematic diagram of the structure of a micro medical device according to an embodiment of the present invention; Figure 2 Schematic diagram of the structure of a lithium titanium oxide-graphene-lithium titanium oxide composite material according to an embodiment of the present invention; Figure 3 A schematic diagram of the circuit principle of a micro medical device according to an embodiment of the present invention; Figure 4 FIG. 4 is a schematic diagram of a module of an external terminal according to an embodiment of the present invention.

[0033] like Figure 1-4 As shown, an embodiment of the present invention provides a micro medical device, including an action component 100 implanted at the connection between the Achilles tendon and the soleus muscle, and the action component 100 at least includes:

[0034] The fixing seat 1 comprises a shaft portion 11 and a fixing portion 12, wherein the fixing portion 12 is fixed to the connection portion between the Achilles tendon and the soleus muscle by a gripper 121 arranged at the periphery of the bottom of the fixing portion;

[0035] The rotating piece 2 includes a first rotating piece 21 and a second rotating piece 22 that are rotatably matched with the shaft portion 11. The first rotating piece 21 and the second rotating piece 22 are driven by a first micro-driver 31 and a second micro-driver 32, respectively, to control the angle between the first rotating piece 21 and the second rotating piece 22;

[0036] Electrode 4, the electrode 4 includes a positive electrode 41 and a negative electrode 42, the positive electrode 41 is distributed at the end of the first rotating sheet 21, and the negative electrode 42 is distributed at the end of the second rotating sheet 22;

[0037] Battery 5, the positive pole and negative pole of the battery are connected to the positive electrode and the negative electrode respectively, and the battery is also used to supply power to the entire active component.

[0038] It should be noted that the rotating piece part of the active component has a certain relative movement, and the electrode at the end of the rotating piece moves relative to it, so that the location of electrical stimulation changes. The active component needs to be implanted in the human body, so its overall external material can be selected from biomedical metal materials, biomedical polymer materials with plasticity, biomedical polymer materials or bioceramics, biocomposite materials, etc. If the overall external material is a non-conductive material (such as bioceramics), the electrode part needs to be made of a conductive material (such as titanium alloy). If the overall external material is a conductive material (such as titanium alloy), other parts except the electrode part need to be coated with insulating biomaterials (such as silicone).

[0039] The first rotating piece 21 and the second rotating piece 22 are both arc-shaped and adapted to the contour of the soleus muscle.

[0040] Because the soleus muscle itself is a curved structure, the first rotating plate and the second rotating plate are both set to be arc-shaped, and the positive and negative electrodes at the ends of the first rotating plate and the second rotating plate are disc-shaped, and a number of conductive stimulation tips are distributed on the surface of the disc-shaped electrodes.

[0041] The first rotating piece 21 has first sleeves sleeved on both sides of the shaft at its root, and the second rotating piece 22 has a second sleeve sleeved on the middle of the shaft at its root. The second sleeve is located between the two first sleeves.

[0042] The fixing part of the fixing seat is a solid structure, which is fixed to the connection between the Achilles tendon and the soleus muscle by a gripper arranged at the bottom periphery of the fixing part, and fixed to the target part by a fixing nail; the shaft of the fixing seat is a hollow structure, and the first micro-actuator, the second micro-actuator, the battery and the controller are integrated inside the shaft, and of course the battery and the controller can be integrated outside the fixing seat if necessary. The first micro-actuator and the second micro-actuator can use micro-stepping motors, and the driving rotor of the first micro-actuator is connected to the first sleeve to drive the first rotating piece to rotate, and the driving rotor of the second micro-actuator is connected to the second sleeve to drive the second rotating piece to rotate.

[0043] Furthermore, the function components of this embodiment also include:

[0044] Controller 6, the controller is electrically connected to the first micro-driver and the second micro-driver, and is used to receive a control signal from an external terminal to adjust the angle of the first rotating plate and the second rotating plate; the controller is electrically connected to the positive electrode and the negative electrode, and is used to receive a control signal from an external terminal to control the current on and off between the positive electrode and the negative electrode.

[0045] The controller is used to receive and identify control signals sent by external terminals, and based on the corresponding control signals, control the opening and closing of the active components, the location of electrical stimulation, the intensity of electrical stimulation, etc.

[0046] It should be noted that the device of this embodiment further includes: an external terminal 200, which at least includes:

[0047] The receiving module 201 is used to receive the control information input by the operator;

[0048] The processing module 202 processes the control information and generates a corresponding control signal;

[0049] The sending module 203 sends the control signal to the controller of the active component.

[0050] The control information includes but is not limited to: switch information, electrical stimulation site information, and current intensity.

[0051] Specifically, the battery comprises a positive electrode, a negative electrode and a separator, the separator is located between the positive electrode and the negative electrode, the negative electrode comprises a negative electrode current collector, the surface of the negative electrode current collector is coated with a negative electrode material, and the positive electrode comprises a positive electrode current collector, the surface of the positive electrode current collector is coated with a positive electrode material; wherein the negative electrode material is a lithium titanium oxide-graphene-lithium titanium oxide composite material, the composite material is a particle structure formed by a plurality of hammer-shaped structures gathered on a graphene connector, the hammer head of the hammer-shaped structure is divided into spherical lithium titanium oxide particles, the graphene thin layer distributed on the surface of the lithium titanium oxide particles forms a graphene conductive network 1000, the hammer-shaped The hammer handle of the structure is a graphene rod 2000, and the root of the graphene rod is interconnected with a graphene connector 3000, the maximum diameter of the cross section of the graphene rod is smaller than the particle size of the lithium titanium oxide particles, and the maximum diameter of the cross section of the graphene connector is smaller than the particle size of the lithium titanium oxide particles; the positive electrode material includes lithium manganese oxide, a conductive agent and a binder; the diaphragm is a polypropylene / polyethylene composite film; the electrolyte includes an organic solvent and a lithium salt, wherein the molar ratio of each component of the organic solvent is ethylene carbonate: propylene carbonate: ethyl methyl carbonate = 1:1:1, and the lithium salt is lithium hexafluorophosphate with a concentration of 1M.

[0052] The particle size of the lithium titanium oxide particles is 100-500nm, the thickness of the graphene thin layer is 5-20nm, and the maximum cross-sectional size of the graphene connector is 50-300nm.

[0053] The thin film battery of this embodiment is prepared by the following steps:

[0054] a. preparing lithium titanium oxide particles, wherein the lithium titanium oxide particles have a spherical shape;

[0055] b. Add concentrated sulfuric acid (pure H2SO4 aqueous solution with a mass fraction of 80%) to the reactor, and then add artificial flake graphite, the total amount of artificial flake graphite added is 1 / 3 of the mass of concentrated sulfuric acid by mass; after stirring evenly at a temperature below 0°C, slowly drip hydrogen peroxide at a uniform speed, the total amount of hydrogen peroxide added is 1 / 6 of the mass of concentrated sulfuric acid by mass, the addition time is 2h, and then continue to stir for 2h; then use a water bath to heat, continue to stir for 2h after the temperature rises to 50°C, slowly drip deionized water at a uniform speed to dilute until the volume of the mixed solution is twice that before dilution, and stir thoroughly; then add potassium permanganate, the total amount of potassium permanganate added is 1 / 9 of the mass of concentrated sulfuric acid by mass, stir thoroughly, filter, and dry to obtain graphene oxide powder, add the graphene oxide powder to acetone for ultrasonic dispersion to obtain a graphene oxide dispersion;

[0056] c. Adding the lithium titanium oxide particles obtained in step a to the graphene oxide dispersion obtained in step b, stirring well to obtain a mixed slurry, wherein the mass ratio of lithium titanium oxide to graphene oxide in the mixed slurry is 1:6, filtering, drying, and drying in a drying oven at a temperature of 70° C. to obtain a lithium titanium oxide / graphene oxide composite material precursor, adding the above precursor to a hydrofluoric acid aqueous solution with a mass concentration of 15%, etching once for 2 hours, washing the etched product to remove the hydrofluoric acid on the surface of the product, filtering, and drying to obtain a composite material precursor product after the first etching;

[0057] d. Add the precursor product obtained in step c into ethanol for ultrasonic dispersion treatment. The ultrasonic treatment time is 2 h and the ultrasonic frequency is 100 KHz. Filter and dry to obtain a powdered precursor.

[0058] e. Add the powdered precursor obtained in step d into N-methylpyrrolidone in an amount 3 times the mass of the precursor powder, stir to mix evenly, and obtain a negative electrode slurry;

[0059] f. Apply the negative electrode slurry obtained in step e to an aluminum foil as a negative electrode current collector, dry it at 65° C. for 4 hours, and then heat treat it at 180° C. for 20 hours under vacuum conditions to reduce the graphite oxide to graphene with a porous cross-linked structure, so that the graphene is coated on the surface of lithium titanium oxide particles, and a template method is used to form a particle structure in which a plurality of hammer-shaped structures are gathered on a graphene connector, thereby obtaining a negative electrode precursor with a negative electrode material coated on the surface of the negative electrode current collector;

[0060] g. Immerse the negative electrode precursor obtained in step f in a hydrofluoric acid aqueous solution with a mass concentration of 20%, perform secondary etching for 4 hours, take out the negative electrode precursor, wash and remove the hydrofluoric acid on the surface of the negative electrode precursor, and dry it at a temperature of 65° C. for 8 hours under vacuum conditions to obtain a negative electrode with a negative electrode material layer coated on the surface of the negative electrode current collector, wherein the negative electrode material is a lithium titanium oxide-graphene-lithium titanium oxide composite material;

[0061] h. Using lithium manganate as the positive electrode active material to prepare a positive electrode;

[0062] i. An electrode assembly is formed with a stacking structure of negative electrode / diaphragm / positive electrode / diaphragm / negative electrode. The electrode assembly is placed in a housing, injected with electrolyte and sealed to form a battery preform. The battery preform is subjected to a formation process, followed by capacity division and grouping to obtain a thin-film secondary battery, wherein the number of electrodes stacked in the stacking structure can be adjusted according to the output power of the battery.

[0063] The following table compares the differences in capacity retention and safety between the battery of this embodiment and the battery in the prior art. The experimental group uses the battery of the embodiment of the present invention, and the control group uses graphite carbon powder as the active material, PEO as the binder to prepare the negative electrode, and lithium manganese oxide as the positive electrode active material to prepare the positive electrode, and the other steps are exactly the same as those of the embodiment of the present invention.

[0064] Table 1

[0065]

[0066] The technical solution of the embodiment of the present invention has the following beneficial effects:

[0067] The present invention provides a micro medical device, the angle formed by the rotating plate of the device can be adjusted, so the position of the electrode can also be adjusted, the electrode can stimulate more muscle parts, thereby enhancing the treatment effect, the selection of lithium titanium oxide-graphene-lithium titanium oxide composite material of battery electrode material also greatly increases the specific energy of the battery electrode, and at the same time has stable electrical conduction and electrical output performance, and can maintain a high capacity maintenance rate under high-power operation conditions, so that the life, stability and safety of the entire device are greatly improved.

[0068] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A micro medical device, characterized in that: The device includes an action component implanted at the junction of the Achilles tendon and the soleus muscle, and also includes an external terminal; The functional components at least include: A fixing seat, comprising a shaft portion and a fixing portion, wherein the fixing portion is fixed to the connection portion between the Achilles tendon and the soleus muscle by a gripper arranged at the periphery of the bottom of the fixing portion; A rotating piece, the rotating piece comprising a first rotating piece and a second rotating piece rotatably matched with the shaft portion, the first rotating piece and the second rotating piece are driven by a first micro-driver and a second micro-driver respectively to control the angle between the first rotating piece and the second rotating piece; Electrodes, the electrodes comprising a positive electrode and a negative electrode, the positive electrode being distributed at an end of the first rotating sheet, and the negative electrode being distributed at an end of the second rotating sheet; A battery, wherein the positive electrode and the negative electrode of the battery are connected to the positive electrode and the negative electrode respectively, and the battery is used to supply power to the entire active component at the same time; A controller, the controller is electrically connected to the first micro-driver and the second micro-driver, and is used to receive a control signal from an external terminal to adjust the angle of the first rotating piece and the second rotating piece; the controller is electrically connected to the positive electrode and the negative electrode, and is used to receive a control signal from an external terminal to control the current on and off between the positive electrode and the negative electrode; The external terminal at least includes: A receiving module, used for receiving input of control information from an operator; A processing module, which processes the control information and generates a corresponding control signal; The sending module sends the control signal to the controller of the active component.

2. The micro medical device according to claim 1, characterized in that The first rotating piece is provided with first sleeves on the upper and lower sides of the root and sleeved on the upper and lower sides of the shaft, the second rotating piece is provided with a second sleeve on the root and sleeved in the middle position of the shaft, the second sleeve is located between the two first sleeves, the driving rotor of the first micro-driver is connected to the first sleeve to drive the first rotating piece to rotate, and the driving rotor of the second micro-driver is connected to the second sleeve to drive the second rotating piece to rotate.

3. The micro medical device according to claim 2, characterized in that The fixing portion of the fixing seat is a solid structure, and the fixing portion is fixed to the connection position of the Achilles tendon and the soleus muscle by a gripper arranged on the periphery of the bottom of the fixing portion, and is fixed to the target position by a fixing nail.

4. The micro medical device according to claim 3, characterized in that The shaft portion of the fixing seat is a hollow structure, and the first micro-driver, the second micro-driver, the battery and the controller are integrated inside the shaft portion.

5. The micro medical device according to claim 4, characterized in that The first micro-actuator and the second micro-actuator may be micro-stepping motors.

6. The micro medical device according to claim 5, characterized in that The battery comprises a positive electrode, a negative electrode and a separator, wherein the separator is located between the positive electrode and the negative electrode, the negative electrode comprises a negative electrode current collector, the surface of the negative electrode current collector is coated with a negative electrode material, and the positive electrode comprises a positive electrode current collector, the surface of the positive electrode current collector is coated with a positive electrode material; wherein the negative electrode material is a lithium titanium oxide-graphene-lithium titanium oxide composite material, wherein the composite material is a particle structure formed by a plurality of hammer-shaped structures gathered on a graphene connector, wherein the hammer head of the hammer-shaped structure is divided into spherical lithium titanium oxide particles, and the graphene thin layer distributed on the surface of the lithium titanium oxide particles forms a graphene conductor The invention discloses an electric network, wherein the hammer handle of the hammer-shaped structure is a graphene rod, and the root of the graphene rod is interconnected with the graphene connector, the maximum diameter of the cross section of the graphene rod is smaller than the particle size of the lithium titanium oxide particles, and the maximum diameter of the cross section of the graphene connector is smaller than the particle size of the lithium titanium oxide particles; the positive electrode material comprises lithium manganate, a conductive agent and a binder; the diaphragm is a polypropylene / polyethylene composite film; the electrolyte comprises an organic solvent and a lithium salt, wherein the molar ratio of each component of the organic solvent is ethylene carbonate:propylene carbonate:ethyl methyl carbonate=1:1:1, and the lithium salt is lithium hexafluorophosphate with a concentration of 1M.

7. The micro medical device according to claim 6, characterized in that The particle size of the lithium titanium oxide particles is 100-500 nm, the thickness of the graphene thin layer is 5-20 nm, and the maximum cross-sectional dimension of the graphene connector is 50-300 nm.

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