CN217886375U - Self-generating dressing and combined treatment device for skin wounds of self-generating dressing - Google Patents

Abstract

The utility model discloses a self-generating dressing belongs to the dressing field, and self-generating dressing includes the material core layer of rhythmical contraction and diastole and has the membrane surface course of unilateral stickness, material core layer subsides are located the inboard middle part of membrane surface course, be provided with at least one blow vent on the membrane surface course, be provided with the friction nanometer generator in the material core layer. The mechanical energy in the dressing that rhythmical contraction and relaxation is collected through the friction nano generator implanted in the dressing of this disclosure to make the dressing can stabilize output electric stimulation.

Description

Self-generating dressing and skin wound combined treatment device thereof

Technical Field

The utility model relates to a dressing field especially relates to a from electricity generation dressing and be used for above-mentioned from electricity generation dressing's combined treatment device for skin wound.

Background

The Vacuum Sealing Drainage technology (VSD) is a technology widely applied to wound treatment in clinic in recent years, and has the advantages of simple and controllable operation, promotion of wound healing, sustainable absorption of wound exudate, avoidance of cross contamination of infection sources and the like. Electrical Stimulation (ES) is an effective adjunct to wound care, which can stably enhance or mimic the endogenous electric field generated after trauma to promote wound repair. Therefore, in clinical medical practice or experimental research, the two are often combined and applied to the treatment of large-area wound surfaces to accelerate wound surface repair. The current negative pressure closed drainage device and the electric stimulator are two sets of independent systems, so that the VSD and the ES are very complicated to operate in combined treatment, especially the electric stimulator usually adopts a commercial power supply, the operation and the maintenance are complex, the size is large, the carrying is not facilitated, the activity of a patient is not facilitated, and the family treatment requirement is difficult to meet.

Chinese patent publication No. CN101987224B discloses a wound surface alternating negative pressure and local oxygen therapy therapeutic apparatus, which is a negative pressure and wound surface local oxygen supply device applied to the treatment of refractory wound surfaces. The medical foam treatment device comprises a medical foam module with a porous drainage tube, a microelectronic valve controller and a catheter system connected with oxygen and negative pressure, and two treatment principles of wound surface negative pressure treatment technology and local oxygen supply treatment technology are simply and effectively superposed by performing negative pressure and local oxygen supply interactive treatment on a wound surface. This patent document mentions interactive therapy with negative pressure and local oxygen supply, but the effect of pure oxygen therapy is limited.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model discloses the technical problem that will solve is in providing a dressing from electricity generation, collects the mechanical energy in rhythmicity shrink and the diastolic dressing through the friction nanometer generator who implants in the dressing to make the dressing can stabilize the output electro photoluminescence.

To achieve the purpose, the utility model adopts the following technical proposal:

the utility model provides a pair of from electricity generation dressing, including rhythm nature shrink and diastolic material core layer and have the membrane surface course of unilateral stickness, material core layer pastes and locates the inboard middle part of membrane surface course, be provided with at least one blow vent on the membrane surface course, be provided with friction nanometer generator in the material core layer.

The utility model discloses a further technical scheme lies in, still include arrangement circuit, cyclic annular electrode and punctiform electrode, arrangement circuit's input with the friction nanometer generator electricity is connected, cyclic annular electrode with rectifier circuit's anodal electricity is connected, and is corresponding punctiform electrode with rectifier circuit's negative pole electricity is connected.

The utility model discloses a further technical scheme lies in, still includes sealed package, rectifier circuit reaches friction nanometer generator is located in the sealed package, the sealed package is fixed the material core in situ.

The further technical proposal of the utility model is that the material core layer is made of flexible material; preferably, the flexible material is one or more of polytetrafluoroethylene, polyimide, polyformaldehyde, polyamide, polyethylene glycol succinate, polyethylene adipate, cellulose, regenerated fiber sponge, styrene-propylene copolymer, rayon, polymethacrylic acid, polyvinyl alcohol, polyester, polyethylene, polypropylene, polyvinyl chloride, natural rubber, polycarbonate, polychlorinated ether, liquid crystal high polymer and polyurethane foam; preferably, the flexible material is a polyurethane foam.

The utility model discloses a further technical scheme lies in, vent department is provided with the sucking disc, the sucking disc subsides are established on the membrane surface course.

The utility model discloses a further technical scheme lies in, at least one blow vent configuration is induction port and air inlet, the induction port links to each other with the one end of negative pressure pipe, the air inlet links to each other with the one end of gas tube.

The utility model discloses a further technical scheme lies in, friction nanogenerator includes first frictional layer, second frictional layer, first electrode layer, second electrode layer and isolation layer, the friction surface of first frictional layer with the friction surface of second frictional layer sets up relatively, and has between the two and predetermine the clearance, first electrode layer pastes and locates the lateral surface of first frictional layer, second electrode layer pastes and locates the lateral surface of second frictional layer, the isolation layer is located first frictional layer with between the second frictional layer, and will predetermine the clearance and enclose into the cavity.

The utility model discloses a further technical scheme lies in, friction nanometer generator still includes the supporting layer, the supporting layer is located first frictional layer with between the second frictional layer, the supporting layer is made by insulating material.

The utility model also provides a pair of combine therapy device for according to skin wound, include the negative pressure drainage ware and be used for foretell from the electricity generation dressing, the negative pressure drainage ware includes negative pressure pump, negative pressure pipe and gas tube, the negative pressure pump passes through the negative pressure pipe is linked together with the induction port, the pump passes through the gas tube with the air inlet is linked together.

The utility model discloses a further technical scheme lies in, still include the drainage jar, the negative pressure pipe includes first negative pressure pipe and second negative pressure pipe, the negative pressure pump through first negative pressure pipe with the first interface of drainage jar links to each other, the second interface of drainage jar passes through the second negative pressure pipe with the induction port is linked together.

The beneficial effects of the utility model are that:

the utility model provides a from electricity generation dressing combines through the material sandwich layer with rhythm nature shrink and diastole with friction nanometer generator, has realized turning into the electric energy of friction nanometer generator with the mechanical energy of confined dressing rhythm nature shrink and diastole in-process to output the electro photoluminescence after through the rectifier module rectification. Through inciting somebody to action the utility model provides a from electricity generation dressing combines with the negative pressure drainage ware among the combined treatment device for skin wound, and the ingenious integration that realizes negative pressure drainage, oxygenation and three kinds of surface of a wound diagnosis and treatment means of electro photoluminescence just more has the portability.

Drawings

Fig. 1 is a schematic structural diagram of a self-generating dressing provided in a first embodiment of the present invention;

fig. 2 is a schematic cross-sectional view of a self-generating dressing provided in the first embodiment of the present invention;

fig. 3 is a bottom view of a self-generating dressing provided in a first embodiment of the invention, without an attached object;

fig. 4 is a schematic structural diagram of a friction nano-generator provided in the first embodiment of the present invention;

fig. 5 is a schematic structural diagram of a friction nanogenerator provided in an embodiment of the invention;

FIG. 6 is a graph comparing the healing rates of comparative tests in groups A and B provided in an embodiment of the present invention;

FIG. 7 is a graph of the cell migration trajectories for the group A assay provided in an embodiment of the present invention;

fig. 8 is a diagram of the track of the directional migration of the cells in the group C experiment provided in the embodiment of the present invention, wherein the cycle of air pumping and air charging is: pumping air for 1s, and inflating for 1s;

fig. 9 is a diagram of the cell directional migration trace of the group B experiment provided in the embodiment of the present invention, wherein the duty cycle of air pumping and air charging is: pumping for 3s and inflating for 1s;

FIG. 10 is a graph of the output voltage waveform of the group C test provided in an embodiment of the present invention;

fig. 11 is a waveform diagram of the output current of the group C test provided in the embodiment of the present invention;

fig. 12 is a graph of output voltage waveforms for a group B test provided in an embodiment of the present invention;

fig. 13 is a waveform diagram of an output current of the group B test provided in the embodiment of the present invention.

In the figure: 2. self-generating dressing; 3. rubbing the nano-generator; 4. sealing the cavity; 21. a film facing; 22. a material core layer; 23. a vent; 13. a negative pressure tube; 14. an inflation tube; 11. a negative pressure pump; 12. a booster pump; 40. a suction cup; 6. an attached object; 7. a drainage tank; 131. a first negative pressure tube; 132. a second negative pressure tube; 8. a rectifying circuit; 31. a first friction layer; 32. a second friction layer; 33. a first electrode layer; 34. a second electrode layer; 35. an isolation layer; 36. a support layer; 8. a rectifying circuit; 9. sealing and packaging; 10. a ring-shaped electrode; 20. a dot-shaped electrode; 30. an air filter; 15. a reversing valve; 16. a positive and negative pressure dual-purpose pump.

Detailed Description

The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.

Example one

As shown in fig. 2 to 4, the self-generating dressing provided in this embodiment includes a material core layer 22 with rhythmic contraction and relaxation and a film surface layer 21 with single-side viscosity, the material core layer 22 is attached to the middle of the inner side of the film surface layer 21, at least one vent 23 is provided on the film surface layer, and the friction nano-generator 3 is provided in the material core layer 22. The material core layer 22 is a common medical dressing, the film surface layer 21 with single-side viscosity is attached to the attached object 6 to form a sealed cavity 4 capable of containing the material core layer 22, the material core layer 22 is arranged in the sealed cavity 4, the air pump is communicated with the sealed cavity 4 through a pipeline, and the attached object 6 is generally human wound skin or experimental simulation wound skin and the like. In actual medical activities, the core layer 22 is preferably applied to the wound, and the film surface layer 21 with one side adhesive is preferably adhered to the normal skin for sealing. When the air pump pumps air or inflates air to the sealed cavity 4, the material core layer 22 in the sealed cavity can contract and relax rhythmically. Preferably, material core layer 22 is configured to be a flexible material, further, material core layer 22 is made of a polyurethane foam material, and a polyurethane foam dressing has good biocompatibility and has strong deformability during air suction or inflation, and when internal pressure is low, the dressing can still be tightly attached to a wound surface, that is, the wound sheet has good fitting performance, and meanwhile, the foam-like structure of the dressing can better absorb exudate at the skin of the wound surface of a human body, and meanwhile, the polyurethane foam dressing provides a good microenvironment for wound surface healing. In the self-generating dressing provided by the embodiment, the rhythmic contraction and relaxation material core layer 22 is combined with the friction nano generator 3, so that the rhythmic contraction and relaxation of the material core layer 22 closed by the membrane surface layer 21 are realized, and mechanical energy in the contraction and relaxation process is converted into electric energy of the friction nano generator to output electric stimulation.

In order to rectify the electricity generated by the friction nano-generator 3, the self-generating dressing preferably further comprises a rectification circuit 8, the rectification circuit 8 is used for rectifying the pulse generated by the friction nano-generator 3 into the pulse for electrical stimulation, and the friction nano-generator 3 is electrically connected with the rectification circuit 8. The rectifying circuit 8 is configured as a circuit consisting of at least one rectifying bridge, which is capable of rectifying the bidirectional pulse current generated by the friction nano-generator 3 into a unidirectional pulse current in order to better meet the requirements of the electrical stimulation. The friction nanogenerator 3 is configured as a contact separation type friction nanogenerator, the friction nanogenerator 3 includes a first friction layer 31, a second friction layer 32, a first electrode layer 33 and a second electrode layer 34, the friction surface of the first friction layer 31 and the friction surface of the second friction layer 32 are disposed opposite to each other, and a preset gap is formed between the friction surfaces, and the first electrode layer 33 and the second electrode layer 34 are both made of metal conductive materials, for example: the first electrode layer 33 and the second electrode layer 34 may be configured as Cu tapes or Au or Cu thin electrode layers obtained by a metal magnetron sputtering process. The first electrode layer 33 is located on the outer side surface of the first friction layer 31, namely the upper surface of the first friction layer 31 in the figure, and the second electrode layer 34 is located on the outer side surface of the second friction layer 32, namely the lower surface of the second friction layer 32 in the figure, when the self-generating dressing 2 contracts, the first friction layer 31 and the second friction layer 32 are continuously extruded, so that the friction surfaces of the first friction layer 31 and the second friction layer 32 are continuously rubbed with each other to generate charges, and when the self-generating dressing 2 expands, the first friction layer 31 and the second friction layer 32 are separated due to a preset gap, so that the charges generated by the first friction layer 31 and the second friction layer 32 cannot be completely neutralized to form a potential difference. In order to provide a reasonable predetermined gap between the friction surface of the first friction layer 31 and the friction surface of the second friction layer 32 of the friction nanogenerator 3, it is further preferable that the friction nanogenerator 3 further includes an isolation layer 35, the isolation layer 35 is located between the first friction layer 31 and the second friction layer 32 and at the edge of the first friction layer 31 and the second friction layer 32, and the predetermined gap between the first friction layer 31 and the second friction layer 32 can be adjusted by reasonably setting the thickness of the isolation layer 35. In order to increase the hardness of the first friction layer 31, it is further preferred that the triboelectric nanogenerator 3 further comprises a support layer 36, the support layer 36 is disposed between the first friction layer 31 and the first electrode layer 33, and the support layer 36 is made of an insulating material, such as: the support layer 36 is configured as a 0.15mm-0.2mm thick PET or Kapton sheet. Further preferably, the friction surface of the first friction layer 31 and the friction surface of the second friction layer 32 are polished by using sand paper, and the roughness of the friction surface of the first friction layer 31 and the roughness of the friction surface of the second friction layer 32 can be increased by polishing the sand paper, so that the contact area between the friction surfaces is increased, and the friction power generation effect of the friction nano-generator 3 is improved.

In order to avoid damage to the friction nano-generator 3 and the rectifying circuit 8 by exudates generated on the skin wound surface, the self-generating dressing further comprises a sealing package 9, the rectifying circuit 8 and the friction nano-generator 3 are arranged in the sealing package 9, the sealing package 9 is fixed in the self-generating dressing 2, the sealing package 9 is made of an insulating material, and the material of the sealing package 9 is preferably one or more of PTFE, kapton and PET.

In order to enable electricity generated by the friction nanometer generator 3 to act on the skin wound surface, the self-generating dressing further comprises an annular electrode 10 attached to the periphery of the wound edge of the attached object 6 and a point-shaped electrode 20 attached to the center of the wound surface of the attached object 6, the annular electrode 10 is electrically connected with the positive electrode or the negative electrode of the rectifying circuit 8, and the corresponding point-shaped electrode 20 is electrically connected with the negative electrode or the positive electrode of the rectifying circuit 8. The annular electrode 10 and the point-shaped electrode 20 are made of metal materials with good biocompatibility, such as Au nanoparticles, silver nanowires or platinum, and the like, the annular electrode 10 and the point-shaped electrode 20 can be fixed on one surface, which is in contact with a skin wound surface, of the self-generating dressing 2 through a chemical crosslinking or physical fixing method, the annular electrode 10 is preferably attached to normal skin, namely the diameter of the annular electrode 10 is larger than the maximum outer diameter of the skin wound surface, the point-shaped electrode 20 is preferably attached to the center of the skin wound surface, electricity generated by the friction nano generator 3 is rectified by the rectifying circuit 8 and then acts on the annular electrode 10 and the point-shaped electrode 20, and a directional electric field is generated between the annular electrode 10 and the point-shaped electrode 20 to form electric stimulation. In actual production, the annular electrode 10 and the dot-shaped electrode 20 may be reasonably arranged according to the skin wound area, and the annular electrode 10 provided in this embodiment is annular and only targets a circular skin wound.

Example two

As shown in fig. 1 to 4, the combined treatment device provided in this embodiment is used for negative pressure drainage and oxygenation and electrical stimulation combined treatment of large-area wounds, and includes a negative pressure drainage device and a self-generating dressing 2. The self-generating dressing 2 is formed by placing a material core layer 22 with deformation capacity in a sealed cavity 4, for example: the material core layer 22 with the deformation capacity is wrapped on a flat surgical drainage tube, one end wrapped with the material core layer 22 is placed at a wound, a transparent sealing film is covered to form the self-generating dressing 2 in the first embodiment, and the friction nano-generator 3 is arranged in the friction nano-generator 3. The self-generating dressing 2 is connected with an air pump in the negative pressure drainage device, the air pump is used for pumping air and inflating according to a plurality of preset time periods to drive the self-generating dressing 2 to perform rhythmic contraction and relaxation, and the preset time periods can be periodic or a plurality of time periods reasonably determined according to skin recovery conditions or different electrical stimulation requirements. The friction nanometer generator 3 is implanted into the self-generating dressing 2, and in the process that the air pump drives the self-generating dressing 2 to perform rhythmical contraction and relaxation, the friction nanometer generator 3 located in the self-generating dressing 2 converts mechanical energy generated by contraction and relaxation of the self-generating dressing 2 into electric energy and outputs electric stimulation. The self-generating dressing 2 has deformation capacity, namely the friction nano generator 3 can generate electric stimulation through rhythmic contraction and relaxation. During specific work, the air pump drives the self-generating dressing 2 to perform rhythmic contraction and relaxation in a plurality of preset time periods, and the friction nanometer generator 3 converts mechanical energy generated by the contraction and relaxation of the self-generating dressing 2 into electric energy and outputs rhythmic electric stimulation.

In order to enable the dressing 2 to perform rhythmic contraction and relaxation, the negative pressure drainage device further comprises a negative pressure pipe 13 and an inflation pipe 14, the air pump is configured to be a negative pressure pump 11 and a booster pump 12, the negative pressure pump 11 is communicated with the self-generating dressing 2 through the negative pressure pipe 13 and transmits negative pressure to the sealed cavity 4 of the self-generating dressing 2, and the booster pump 12 is communicated with the self-generating dressing 2 through the inflation pipe 14 and transmits booster pressure to the sealed cavity 4 of the self-generating dressing 2. Further preferably, the film surface layer 21 is provided with a suction cup 40 corresponding to the negative pressure tube 13 and the inflation tube 14, and the negative pressure tube 13 and the inflation tube 14 are communicated with the sealed cavity 4 through the suction cups 40 corresponding thereto. During specific work, the negative pressure pump 11 generates negative pressure through the negative pressure pipe 13, so that the self-generating dressing 2 is in a contraction state, the booster pump 12 generates boosting through the inflation pipe 14, the self-generating dressing 2 is in a relaxation state, the actions are repeated in a plurality of preset time periods, rhythmic contraction and relaxation of the dressing 2 can be achieved, output electric stimulation of the rhythmic property of the friction nanometer generator 3 is achieved, and the purpose of combined treatment is achieved.

In order to drain the exudate generated by the skin wound surface, the self-generating dressing further comprises a drainage tank 7, the negative pressure tube 13 comprises a first negative pressure tube 131 and a second negative pressure tube 132, the negative pressure pump 11 is connected with a first interface of the drainage tank 7 through the first negative pressure tube 131, and a second interface of the drainage tank 7 is communicated with the self-generating dressing 2 through the second negative pressure tube 132. Under the action of the negative pressure pump 11, the exudate and the negative pressure gas generated by the skin wound surface flow into the drainage tank 7 through the second negative pressure tube 132, at this time, the exudate generated by the skin wound surface is heavier than the negative pressure gas, and then falls into the drainage tank 7 for storage, the negative pressure gas continues to enter the negative pressure pump 11 along the first negative pressure tube 131, and then the exudate generated by the skin wound surface is prevented from being sucked back into the negative pressure pump 11 because the negative pressure pump 11 is discharged, so that the drainage tank 7 can be used for preventing the exudate generated by the skin wound surface from being sucked back into the negative pressure pump 11.

In order to ensure that the gas entering the negative pressure drainage device is clean gas, further, the self-generating dressing further comprises an air filter 30 or a clean gas source, the air filter 30 is communicated with the gas pump, the air filter 30 is fixed at the gas inlet of the gas pump, when the gas pump works, the air can be filtered by the air filter 30 firstly and then enters the gas pump of the negative pressure drainage device, so that the gas flowing into the negative pressure drainage device is ensured to be clean gas, and secondary infection at a wound is avoided.

EXAMPLE III

As shown in fig. 5, the self-generating dressing that provides in this embodiment includes negative pressure drainage ware and friction nanometer generator 3, the negative pressure drainage ware includes the air pump and has the self-generating dressing 2 of deformability, the air pump links to each other with self-generating dressing 2, the air pump is bled according to a plurality of preset periods of time and is aerifyd drive self-generating dressing 2 and carry out rhythmic shrink and diastole, friction nanometer generator 3 implants to in the self-generating dressing 2, in the process that self-generating dressing 2 carries out rhythmic shrink and diastole, the mechanical energy that produces from generating dressing 2 shrink and diastole is transformed into the electric energy and output the electro photoluminescence to friction nanometer generator 3 that is located self-generating dressing 2.

The third embodiment is different from the second embodiment in that:

the self-generating dressing provided by the embodiment further comprises a reversing valve 15, the negative pressure drainage device comprises a negative pressure pipe 13, an inflation pipe 14 and the reversing valve 15, the air pump is configured to be a positive and negative pressure dual-purpose pump 16, the positive and negative pressure dual-purpose pump 16 is connected with the reversing valve 15, a first interface of the reversing valve 15 is communicated with the self-generating dressing 2 through the negative pressure pipe 13, and a second interface of the reversing valve 15 is communicated with the self-generating dressing 2 through the inflation pipe 14. Further preferably, the self-generating dressing 2 is provided with a suction cup 40 corresponding to the negative pressure tube 13 and the inflation tube 14, and the negative pressure tube 13 and the inflation tube 14 are communicated with the self-generating dressing 2 through the suction cups 40 corresponding to the negative pressure tube 13 and the inflation tube 14. When the positive and negative pressure dual-purpose pump 16 is communicated with the negative pressure pipe 13 through the reversing valve 15, the positive and negative pressure dual-purpose pump 16 generates negative pressure through the negative pressure pipe 13, the self-generating dressing 2 is in a contraction state, when the positive and negative pressure dual-purpose pump 16 is communicated with the inflation pipe 14 through the reversing valve 15, the positive and negative pressure dual-purpose pump 16 generates pressurization through the inflation pipe 14, the self-generating dressing 2 is in a relaxation state, the actions are repeated in a plurality of preset time periods, rhythmic contraction and relaxation of the dressing 2 can be achieved, rhythmic output electrical stimulation of the friction nano generator 3 is achieved, and the purpose of combined treatment is achieved. Further preferably, the self-generating dressing further comprises a drainage tank 7, the negative pressure pipe 13 comprises a first negative pressure pipe 131 and a second negative pressure pipe 132, the positive and negative pressure dual-purpose pump 16 is connected with a first interface of the drainage tank 7 through the first negative pressure pipe 131, and a second interface of the drainage tank 7 is communicated with the self-generating dressing 2 through the second negative pressure pipe 132. Under the action of the positive and negative pressure dual-purpose pump 16, the exudate and the negative pressure gas generated by the skin wound surface flow into the drainage tank 7 through the second negative pressure tube 132, at this time, the exudate generated by the skin wound surface is heavier than the negative pressure gas, and then falls into the drainage tank 7 for storage, and the negative pressure gas continues to enter the positive and negative pressure dual-purpose pump 16 along the first negative pressure tube 131, and then is discharged out of the positive and negative pressure dual-purpose pump 16.

The combined treatment device comprises a negative pressure drainage device and a friction nano generator 3, wherein the negative pressure drainage device comprises an air pump and a self-generating dressing 2 with deformation capacity. The self-generating dressing 2 is formed by placing a material core layer 22 with deformation capacity in a sealed cavity 4, for example: the material core layer 22 with the deformation capability is wrapped on a flat surgical drainage tube, one end wrapped with the material core layer 22 is placed at the wound, and a transparent sealing film is covered to form the self-generating dressing 2. The effective effect of the self-generating dressing provided in this embodiment is further demonstrated through experiments, and is illustrated by taking the positive and negative pressure dual-purpose pump 16 as an example.

Example four

The self-generating dressing provided in the embodiment is characterized in that the rectifying circuit 8 and the friction nano-generator 3 are arranged in the sealed package 9, the sealed package 9 is implanted into the material core layer 22, and the point-like electrode 20 of the annular electrode 10 is electrically connected with the rectifying circuit 8 in the material core layer 22 and is arranged outside the material core layer 22. The material core layer 22 is placed inside the membrane surface layer 21 and fixed on normal skin on the periphery of the skin wound, the material core layer 22 is attached to the skin wound, and the membrane surface layer 21 and the normal skin form a sealed cavity 4 together with the skin wound after being attached. At this time, it should be noted that the ring-shaped electrode 10 is attached to the periphery of the wound edge of the skin wound surface, and the point-shaped electrode 20 is attached to the center of the wound surface of the skin wound surface. Illustratively, the specific use may be according to the following operation steps:

s00: taking a circular skin wound surface with the diameter of 4cm as an example, selecting a proper polyurethane foam core layer 22 according to the size of the wound, wherein the size of the core layer 22 is configured to be 15-20cm in length, 10-15cm in width and 2.5-4cm in height;

and S10: the friction nanometer generator 3 with the size of 3cm x 6cm x 0.2cm and the rectifying circuit 8 with the size of 0.5cm x 0.08cm are arranged in the sealed package 9, a hollow space of 3.5cm x 5cm x 0.4cm is drawn in the middle of the material core layer 22, the sealed package 9 is fixed in the material core layer 22, and the lead for connecting the annular electrode 10 and the point-shaped electrode 20 extends to the bottom of the material core layer 22;

and S20: fixing a ring electrode 10 with the size of 4.5cm in inner diameter and 5.5cm in outer diameter and a dot electrode 20 with the size of 0.5cm in diameter at the bottom of the material core layer 22, placing the dot electrode 20 in the middle of the ring electrode 10, and electrically connecting the positive and negative leads of the sealed package 9 with the ring electrode 10 and the dot electrode 20 respectively;

and S30: after the material core layer 22 is sterilized and disinfected, the material core layer 22 is attached to the circular skin wound surface by using the membrane surface layer 21, and the membrane surface layer 21 is larger than the dressing in size configuration and can be completely sealed;

and S40: two small holes are cut on the membrane surface layer 21, the negative pressure pipe 13 and the inflation pipe 14 connected with the positive and negative pressure dual-purpose pump 16 are attached to the two small holes through the corresponding suction cups 40, the negative pressure pipe 13 and the inflation pipe 14 are communicated with the sealing cavity 4 of the membrane surface layer 21, and the drainage tank 7 is arranged on the passage of the negative pressure pipe 13.

And S50: the positive and negative pressure dual-purpose pump 16 is started, the positive and negative pressure dual-purpose pump 16 adopts the working mode of charging air for 1s and pumping air for 3s, namely the working frequency of the positive and negative pressure dual-purpose pump 16 is 0.25Hz.

As shown in fig. 12 and 13, fig. 12 and 13 are waveform diagrams of output voltage and current of the self-generating dressing provided in this embodiment, and the rectifying circuit 8 rectifies the bidirectional pulse current generated by the friction nano-generator 3 into a unidirectional pulse current, so as to better meet the requirement of electrical stimulation.

The effective effect of the self-generating dressing provided in the embodiment is further demonstrated by comparative experiments, and the group a providing device is only a negative pressure drainage device (VSD); the device that B group provided is the dressing that generates electricity (VSD-ES) that this application said, its duty cycle of bleeding and aerifing is: pumping air for 3s and inflating air for 1s; the device that C group provided is the dressing that generates electricity (VSD-ES) that this application said, its duty cycle of bleeding and aerifing is: pumping air for 1s, and inflating air for 1s; group a had no electrical stimulation, while groups B and C had electrical stimulation. Referring to fig. 7, 8 and 9, fig. 7 is a diagram illustrating a cell directional migration trace of the group a test provided in the embodiment of the present invention, and fig. 8 is a diagram illustrating a cell directional migration trace of the group C test provided in the embodiment of the present invention, wherein the cycle of air suction and air inflation is: air exhaust 1s, air inflation 1s, fig. 9 is a cell directional migration trace diagram of the group B test provided in the specific embodiment of the present invention, wherein the air exhaust and air inflation work cycle is: air is pumped for 3s, and air is inflated for 1s. The Hacat cell directional migration method has the advantages that a directional electric field is applied to Hacat cells for 3h, and the cell directional migration trace diagram of the group A is compared with the cell directional migration trace diagram of the group B and the cell directional migration trace diagram of the group C, so that the group B obviously promotes the directional migration of the cells, the directional migration effect of the cells is far better than that of the group A and the group C, and the directional migration effect of the cells is slightly better than that of the group A because the group C also has a small amount of electric stimulation, so that the working cycle of air suction and air inflation has an important influence on the strength of the generated electric stimulation, and the directional migration trace of the cells can be obviously influenced only when the electric stimulation has certain strength. As can be seen from comparing fig. 10 and 11 with fig. 12 and 13, the duty cycle of pumping and inflating is as follows: when the air is pumped for 3s and is inflated for 1s, the voltage and the current intensity output by the self-generating dressing are obviously increased, and the electrical stimulation effect is better.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the invention. The present invention is not to be limited by the specific embodiments disclosed herein, and other embodiments that fall within the scope of the claims of the present application are intended to be within the scope of the present invention.

Claims (14)

1. A self-generating dressing, comprising:

a rhythmic contraction and relaxation core layer;

a film facing having a single-sided adhesive; the material core layer is attached to the middle of the inner side of the membrane surface layer, at least one air vent is arranged on the membrane surface layer, and a friction nano generator is arranged in the material core layer;

the friction nano generator also comprises a rectifying circuit, an annular electrode and a point-shaped electrode;

the input end of the rectifying circuit is electrically connected with the friction nano-generator, the annular electrode is electrically connected with the positive electrode of the rectifying circuit, and the corresponding point-like electrode is electrically connected with the negative electrode of the rectifying circuit.

2. The self-generating dressing according to claim 1, wherein:

further comprising a hermetic package;

the rectifying circuit and the friction nano-generator are positioned in the sealed package;

the sealing package is fixed in the material core layer.

3. The self-generating dressing according to claim 1, wherein:

the material core layer is made of flexible materials.

4. The self-generating dressing according to claim 3, wherein:

the flexible material is one of polytetrafluoroethylene, polyimide, polyformaldehyde, polyamide, polyethylene glycol succinate, polyethylene glycol adipate, cellulose, regenerated fiber sponge, styrene-propylene copolymer, rayon, polymethacrylic acid, polyvinyl alcohol, polyester, polyethylene, polypropylene, polyvinyl chloride, natural rubber, polycarbonate, polychlorinated ether, liquid crystal high polymer and polyurethane foam.

5. The self-generating dressing according to claim 1, characterized in that:

the air vent is provided with a sucker:

the sucking disc pastes to be established on the membrane surface course.

6. The self-generating dressing according to claim 5, characterized in that:

at least one air vent is configured as an air inlet and an air outlet;

the air suction port is connected with one end of the negative pressure pipe;

the air inlet is connected with one end of the inflation tube.

7. The self-generating dressing according to claim 1, wherein:

friction nanometer generator includes first frictional layer, second frictional layer, first electrode layer, second electrode layer and isolation layer, the friction surface of first frictional layer with the friction surface of second frictional layer sets up relatively, and has between the two and predetermine the clearance, first electrode layer pastes and locates the lateral surface of first frictional layer, the subsides of second electrode layer are located the lateral surface of second frictional layer, the isolation layer is located first frictional layer with between the second frictional layer, and will predetermine the clearance and enclose into the cavity.

8. The self-generating dressing according to claim 7, wherein:

the triboelectric nanogenerator further comprises a support layer;

the supporting layer is arranged between the first friction layer and the second friction layer;

the support layer is made of an insulating material.

9. A combined treatment device for skin wounds, characterized by comprising a negative pressure drainage device and the self-generating dressing of any one of claims 1 to 8:

the negative pressure drainage device comprises a negative pressure pump, an inflator pump, a negative pressure pipe and an inflator pipe, wherein the negative pressure pump is communicated with the air suction port through the negative pressure pipe, and the inflator pump is communicated with the air inlet through the inflator pipe.

10. The combination treatment device for skin wounds according to claim 9, characterized in that: also comprises a drainage tank;

the negative pressure pipe comprises a first negative pressure pipe and a second negative pressure pipe;

the negative pressure pump is connected with the first interface of the drainage tank through the first negative pressure pipe, and the second interface of the drainage tank is communicated with the air suction port through the second negative pressure pipe.

11. The combination treatment device for skin wounds according to claim 9, characterized in that: the negative pressure drainage device also comprises a reversing valve, a negative pressure pipe and an inflation pipe;

the inflation pump is configured to be a positive-negative pressure dual-purpose pump, the positive-negative pressure dual-purpose pump is connected with the reversing valve, a first interface of the reversing valve is communicated with the closed dressing through a negative pressure pipe, and a second interface of the reversing valve is communicated with the closed dressing through an inflation pipe.

12. The combination treatment device for skin wounds according to claim 9, characterized in that:

the wound surface treatment device is characterized by further comprising an annular electrode attached to the periphery of the wound edge of the attached object and a point-like electrode attached to the center of the wound surface of the attached object, wherein the annular electrode is electrically connected with the positive electrode of the rectifying circuit, and the corresponding point-like electrode is electrically connected with the negative electrode of the rectifying circuit.

13. The combination treatment device for skin wounds according to claim 9, characterized in that:

the air filter is communicated with the inflator pump, and the air filter is fixed at an air inlet of the inflator pump.

14. The combination treatment device for skin wounds according to claim 9, characterized in that:

the output voltage and current of the friction nano generator are adjusted through the working period of air suction and air inflation.

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