Scar repair equipment and method for assisting burn plastic surgery

Abstract

The invention provides scar repairing equipment and method for assisting burn and plastic surgery, the scar repairing equipment comprises an injection device and a flexible mask which can be applied to the skin surface and fluctuates along with the skin, the flexible mask is divided into a plurality of sub-intervals, each sub-interval is provided with an injection area and an air bag, and the air bag is inflated / deflated, so that the scar repairing effect is improved. The air bag can expand outwards or contract inwards in the thickness direction of the flexible mask. The injection device injects repairing medicine into the skin through the injection needle penetrating through the flexible mask of the injection area, meanwhile, gas is injected into / extracted from the gas bag through the gas needle synchronously, and the gas injection amount / gas extraction amount of the gas bag is in direct proportion to the injection amount of the injection needle in the corresponding subarea. The flexible mask can fluctuate along with fluctuation of the skin, and the injection amount of the injection needle is reflected through the outward expansion / inward contraction distance of the air bag, so that the injection amount of the injection needle is controlled, the injection amount of the injection needle at the deep mark position is larger than that of the injection needle at the shallow mark position, and the injection amount of the injection needle is accurately controlled.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical devices, and in particular relates to a scar repair device and method for assisting burn plastic surgery. Background Art

[0002] Burn plastic surgery refers to plastic surgery after burns. Post-burn deformities are manifested as tissue loss, displacement or hyperplasia. In principle, tissue repositioning is used for tissue displacement, tissue excision is used for excessive tissue, and tissue transplantation is used for tissue loss. Scars will form after burn plastic surgery. If scars are not properly treated, they will form scars and affect the appearance.

[0003] After burn plastic surgery, scar treatment injection needles (which work similarly to hyaluronic acid injections, but use different drugs) are used in burn repair to help improve the recovery of skin after burns through their deep moisturizing and skin regeneration-promoting properties; and are supplemented with drugs that inhibit scar hyperplasia to inhibit scar hyperplasia, so that the skin can achieve better recovery effects. The burn repair process usually takes a certain amount of time, and scar treatment injection needles can help inhibit scar hyperplasia, accelerate skin healing, and enhance skin elasticity and hydration by providing repair drugs (including hormones, fluorouracil, etc. to inhibit scar hyperplasia; autologous fat, fat glue, autologous cells, hyaluronic acid, poly-L-lactic acid, etc. to accelerate repair). During the burn recovery period, the effects of the repair drugs injected by the scar treatment injection needle are mainly reflected in the following aspects: 1) Accelerate skin repair: The injection of ingredients such as hyaluronic acid can improve skin hydration and promote skin regeneration and repair in the burn area; 2) Improve skin quality: After a burn, the skin may become dry and tight. Injected drugs can help improve skin moisture and restore skin luster; 3) Inhibit scar hyperplasia: Hormones, fluorouracil, etc. can effectively prevent the proliferation of scars on burn wounds; 4) Stimulate collagen production: The repair drug ingredients in the scar treatment injection needle can promote the synthesis of collagen and help restore skin elasticity and firmness.

[0004] For scars after burn plastic surgery, the skin surface is uneven. Deep scars require more repair drugs to be injected by scar treatment injection needles, while shallow scars require less repair drugs to be injected by scar treatment injection needles. The current scar drug treatment injection needles (similar to water light needles) rely on the scale on the syringe to confirm the injection volume, but because each scar has a different shape and size, it is impossible to accurately measure the size of the scar, so it is difficult to accurately grasp the injection volume each time, and the injection is not accurate.

[0005] After searching, no similar technical solution to the present invention has been disclosed. Summary of the invention

[0006] The present invention aims to solve the technical problems existing in the prior art. The first object of the present invention is to provide a scar repair device for assisting burn plastic surgery. The second object of the present invention is to provide a repair method based on the aforementioned scar repair device.

[0007] To achieve the above-mentioned first purpose, the present invention adopts the following technical scheme: a scar repair device for auxiliary burn plastic surgery, comprising an injection device and a flexible mask that can be applied to the skin surface and rise and fall with the skin, the flexible mask is divided into a plurality of sub-areas, each sub-area has an injection area and an indication area, the indication area is an airbag surrounding part or all of the injection area in the sub-area in which it is located, and the airbag is inflated / deflated by the injection device, and the airbag can expand outward / contract inward along the thickness direction of the flexible mask; the injection device has an injection needle and an air needle, and the injection device injects repair drugs into the skin through the flexible mask of the injection area through the injection needle, and at the same time, the injection device simultaneously injects / extracts gas into the airbag through the air needle, and the amount of gas injected / extracted into the airbag is proportional to the injection amount of the injection needle of the corresponding sub-area.

[0008] In the above technical solution, the flexible mask can rise and fall with the rise and fall of the skin, and the airbag's gas injection / air extraction volume is proportional to the injection volume of the injection needle in the corresponding sub-interval. At the location of the deep mark, the airbag expands outward / contracts inward for a large distance, and the airbag's gas injection / air extraction volume is more, which can ensure that the injection volume of the injection needle is more; at the location of the shallow mark, the airbag expands outward / contracts inward for a small distance, and the airbag's gas injection / air extraction volume is reduced, which can ensure that the injection volume of the injection needle is less. In this way, the injection volume of the injection needle is reflected by the distance of the airbag's outward expansion / inward contraction, so as to control the injection volume of the injection needle, so that the drug injection volume at the deep mark location is more than that at the shallow mark location, and the drug injection volume is accurately controlled.

[0009] In a preferred embodiment of the present invention, the injection device includes a syringe, the syringe has a liquid injection chamber and a gas chamber arranged side by side, the injection needle is installed at the front end of the liquid injection chamber and is connected to the interior of the liquid injection chamber, the gas needle is installed at the front end of the gas chamber and is connected to the interior of the gas chamber, and the first piston and the second piston are respectively slidably connected in the liquid injection chamber and the gas chamber; the first piston and the second piston are both connected to a force-applying mechanism, and the first piston is moved forward by the force-applying mechanism to inject the repair drug, and at the same time, the second piston can move forward synchronously to inject gas into the airbag or move backward to extract the gas in the airbag.

[0010] In the above technical solution, the injection device has a double-chamber structure. By setting a force-applying mechanism, the movement direction of the second piston is the same as or opposite to that of the first piston, so that when the injection needle injects the drug, the air needle synchronizes with the air bag to inject / extract gas.

[0011] In a preferred embodiment of the present invention, the force-applying mechanism includes a first piston rod fixedly connected to the rear end of the first piston, a second piston rod fixedly connected to the rear end of the second piston, and a force plate; when the first piston moves forward and the second piston moves forward synchronously, the ends of the first piston rod and the second piston rod away from the injection cylinder are fixedly connected to the force plate; when the first piston moves forward and the second piston moves backward synchronously, the ends of the first piston rod away from the injection cylinder are fixedly connected to the force plate, a transmission rod parallel to the second piston rod is fixedly connected to the force plate, the transmission rod has a first rack segment, the second piston rod has a second rack segment parallel to the first rack segment, and a transmission gear is provided between the first rack segment and the second rack segment and can rotate relative to the injection cylinder and is meshed with both at the same time.

[0012] In the above technical scheme, the two piston rods are fixedly connected, and when the force plate is pushed to inject the repair drug, the second piston and the first piston slide forward by an equal distance, so that the amount of gas injected into the airbag is proportional to the injection amount of the injection needle in the corresponding sub-interval; by setting a transmission gear and two rack segments, when the force plate is pushed to inject the repair drug, the distance the second piston moves backward is equal to the distance the first piston slides forward, so that the amount of gas extracted from the airbag is proportional to the injection amount of the injection needle in the corresponding sub-interval.

[0013] In a preferred embodiment of the present invention, at least one injection needle is provided at the front end of the liquid injection chamber. When multiple injection needles are provided, the multiple injection needles are distributed in an array.

[0014] In the above technical solution, multiple injection needles are distributed in an array, so that the drug injection is more uniform and the effect is better.

[0015] In a preferred embodiment of the present invention, the outer surface of each airbag is provided with an air port protruding from the flexible mask, and an air needle can inject gas into / extract gas from the airbag through the air port. An injection one-way valve that only allows gas to flow from the air needle into the airbag / an extraction one-way valve that only allows gas to flow from the airbag to the air needle is provided at the air port.

[0016] The above technical solution, by setting the air port, facilitates the connection between the air needle and the airbag, which can avoid puncturing the airbag; the air injection one-way valve plays a check valve role to prevent the gas filled in the airbag from overflowing, and the air extraction one-way valve plays a check valve role to prevent the outside atmosphere from entering the airbag.

[0017] In another preferred embodiment of the present invention, the gas port is made of a flexible hose.

[0018] In the above technical solution, the air port adopts a flexible hose to facilitate the connection and disconnection of the air needle and the air port.

[0019] In another preferred embodiment of the present invention, the injection area is located in the middle of the sub-area, and the airbag is an annular airbag surrounding the injection area.

[0020] In the above technical solution, the annular airbag allows the outer surfaces of adjacent sub-intervals to form one piece, making it easier to observe whether the surface of the flexible mask is flat, and the indication effect is better.

[0021] To achieve the above second objective, the present invention adopts the following technical scheme: a repair method for assisting burn plastic surgery, comprising the following steps: S1, determining whether the scar type is an atrophic scar or a hypertrophic scar / keloid; S2, selecting a corresponding injection device according to the scar type, an injection device in which an injection needle and an air needle simultaneously inject gas into an air bag during injection for an atrophic scar, and an injection device in which an air needle and an air needle extract gas from the air bag during injection for a hypertrophic scar / keloid; S3, selecting a corresponding flexible mask according to the scar type, applying the flexible mask to the skin of the burn site, and the flexible mask rises and falls with the rise and fall of the skin; S4, placing the air needle and the air needle together; The air bag is connected, and the injection needle is aligned with the injection area of ​​the sub-interval. With the assistance of the magnifying device, the injection needle passes through the injection area of ​​the flexible mask and pierces the skin. The injection device is operated to allow the injection needle to slowly inject the repair drug into the skin. At the same time, the air needle synchronously injects gas into the air bag / extracts gas from the air bag, so that the air bag expands outward / contracts inward along the thickness direction of the flexible mask until the outer surface of the sub-interval is flush with the outer surface of the adjacent injected sub-interval, and the injection of the injection needle is stopped; S5, disconnect the air needle from the air bag and pull out the injection needle; S6, switch to the next sub-interval, and repeat steps S4 and S4 until all sub-intervals corresponding to the scar are injected.

[0022] According to the above technical scheme, for atrophic scars, the injection needle injects gas into the airbag while the air needle injects, and for hypertrophic scars and keloids, the injection needle injects gas while the air needle extracts the gas injected in the airbag until the outer surface of the sub-interval is flat with the outer surface of the adjacent injected sub-interval, and the injection needle stops injecting. When all sub-intervals of the flexible mask are injected, the outer surface of the flexible mask is basically flat, so that the airbag at the deep scar position has a large outward expansion / inward contraction distance and a large amount of air injected / extracted from the airbag, while the airbag at the shallow scar position has a small outward expansion / inward contraction distance and a small amount of air injected / extracted from the airbag, thereby ensuring that the amount of drug injected is larger in the deep scar and smaller in the shallow scar.

[0023] In another preferred embodiment of the present invention, the following step is further included after step S6: for the concave / convex sub-intervals on the surface of the airbag, supplementary injection is performed according to step S4.

[0024] In the above technical solution, after all sub-intervals have been injected, leak checks are performed to avoid insufficient injection or missed injection.

[0025] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0027] Figure 1 Schematic diagram of the structure of the flexible mask in the embodiment.

[0028] Figure 2 It is a schematic diagram of the structure of the injection device in the first embodiment.

[0029] Figure 3 It is a schematic diagram of the structure of the injection device in the second embodiment.

[0030] The figure marks in the drawings of the specification include: flexible mask 10, sub-interval 11, injection area 12, air bag 13, air port 14, injection device 20, injection cylinder 21, liquid filling tank 211, air tank 212, injection needle 22, air needle 23, first piston 24, second piston 25, force mechanism 26, first piston rod 261, second piston rod 262, force plate 263, transmission rod 264, transmission gear 265, guide seat 266. DETAILED DESCRIPTION

[0031] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0032] In the description of the present invention, it is to be understood that the terms “longitudinal”, “lateral”, “vertical”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside” and “outside” etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0033] In the description of the present invention, unless otherwise specified and limited, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a mechanical connection or an electrical connection, or it can be the internal connection between two components. It can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances.

[0034] Embodiment 1

[0035] The present embodiment provides a scar repair device for assisting burn plastic surgery, which is suitable for atrophic scars. Atrophic scars clinically manifest as skin depressions. They are a type of skin atrophy induced by the loss of skin collagen fibers or subcutaneous fiber contracture, and can be seen after acne infection or trauma. Hypertrophic scars are the most common type of scars in clinical practice and can be further subdivided based on clinical characteristics.

[0036] like Figure 1 and Figure 2 As shown, in a preferred embodiment, the scar repair device includes an injection device 20 and a flexible mask 10 that can be applied to the skin surface and rise and fall with the skin. The material of the flexible mask 10 can be thin silicone, which is the same as the material of the silicone mask but thinner and closer to the skin. It is used after disinfection. More preferably, the periphery of the flexible mask 10 is self-adhesive and more firmly fixed. The flexible mask 10 is divided into a plurality of rectangular sub-intervals 11, each sub-interval 11 is equal in size, each sub-interval 11 has an injection area 12 and an indication area, and the indication area is an airbag 13 surrounding the sub-interval 11 where it is located. The airbag 13 of each sub-interval 11 is equal in size, and the airbag 13 partially or completely surrounds the injection area 12. The airbag 13 is inflated by the injection device 20, and the airbag 13 can expand outward along the thickness direction of the flexible mask 10. Preferably, the injection area 12 is located in the middle of the sub-interval 11, and the airbag 13 is an annular airbag surrounding the injection area 12.

[0037] The injection device 20 has an injection needle 22 and an air needle 23. The injection device 20 injects the repair drug into the skin through the injection needle 22 through the flexible mask 10 of the injection area 12, and the injection device 20 simultaneously injects gas into the air bag 13 through the air needle 23. The amount of gas injected into the air bag 13 is proportional to the amount injected by the injection needle 22 of the corresponding sub-area 11. In the present invention, at least one injection needle 22 is provided at the front end of the injection bin 211. When multiple injection needles 22 are provided, the multiple injection needles 22 are distributed in an array, and the injection of the repair drug is more uniform.

[0038] The flexible mask 10 of the present invention can rise and fall with the rise and fall of the skin. Corresponding to atrophic scars, while the injection needle 22 injects repair drugs (the repair drugs are determined according to the scar conditions), the gas needle 23 simultaneously injects gas into the airbag 13, and the airbag 13 expands outward, and finally makes the surface of the flexible mask 10 basically flat as a whole. Where the scar is deep, the airbag 13 expands outward a large distance and the airbag 13 injects a large amount of gas, and where the scar is shallow, the airbag 13 expands outward a small distance and the airbag 13 injects a small amount of gas. Because the gas injection volume of the airbag 13 is proportional to the injection volume of the injection needle 22 in the corresponding sub-interval 11, the greater the outward expansion distance of the airbag 13, the greater the gas injection volume of the airbag 13, and the greater the injection volume of the injection needle 22; the smaller the outward expansion distance of the airbag 13, the smaller the gas injection volume of the airbag 13, and the greater the injection volume of the injection needle 22. The injection volume of the injection needle 22 can be reflected by the outward expansion distance of the airbag 13, which is more intuitive and can achieve that the injection volume of the injection needle 22 at the deep mark position is greater than that at the shallow mark position, thereby accurately controlling the injection volume of the injection needle 22.

[0039] It should be noted that, in practice, the flexible mask 10 can be provided in various sizes to meet the needs of burn plastic surgery scars of different sizes, and the size of the flexible mask 10 can also be cut according to demand.

[0040] like Figure 2 As shown, in the present invention, the injection device 20 includes a syringe 21, and the syringe 21 has a liquid injection chamber 211 and a gas chamber 212 arranged side by side. The injection needle 22 is installed at the front end of the liquid injection chamber 211 and communicated with the inside of the liquid injection chamber 211. The gas needle 23 is installed at the front end of the gas chamber 212 and communicated with the inside of the gas chamber 212. The front end tip of the gas needle 23 is located at the rear side of the injection needle 22, so that when the injection needle 22 pierces the skin, the gas needle 23 will not pierce the airbag 13. The first piston 24 and the second piston 25 are slidably connected in the liquid injection chamber 211 and the gas chamber 212, respectively. The first piston 24 and the second piston 25 are both connected to the force applying mechanism 26. The force applying mechanism 26 allows the first piston 24 to move forward to inject the repair drug, and the second piston 25 can move forward synchronously to inject gas into the airbag 13. Among them, the force-applying mechanism 26 includes a first piston rod 261 fixedly connected to the rear end of the first piston 24, a second piston rod 262 fixedly connected to the rear end of the second piston 25, and a force plate 263. The ends of the first piston rod 261 and the second piston rod 262 away from the injection cylinder 21 are fixedly connected to the force plate 263.

[0041] When the first piston rod 261 and the second piston rod 262 are pushed forward by the force plate 263, the first piston 24 and the second piston 25 slide forward synchronously in the syringe 21, and the first piston 24 and the second piston 25 slide forward the same distance, so that the gas injection amount of the airbag 13 is proportional to the injection amount of the injection needle 22 of the corresponding sub-interval 11. The cross-sectional area of ​​the airbag 13 is determined, and the gas injection amount can be obtained according to the distance of the outward expansion of the airbag 13. The ratio of the cross-sectional area of ​​the gas chamber 212 to the cross-sectional area of ​​the liquid injection chamber 211 is determined (that is, the gas injection amount is proportional to the liquid injection amount), and then the injection amount of the injection needle 22 can be determined.

[0042] It should be noted that, in practice, according to the different sizes of the sub-interval 11 and the different sizes of the airbag 13, injection devices 20 with various proportions (the ratio of the cross-sectional area of ​​the air chamber 212 to the cross-sectional area of ​​the liquid injection chamber 211) can be set. When the sub-interval 11 is small, the grid of the flexible mask 10 is small, and the ratio of the cross-sectional area of ​​the air chamber 212 to the cross-sectional area of ​​the liquid injection chamber 211 is small; when the sub-interval 11 is large, the grid of the flexible mask 10 is large, and the ratio of the cross-sectional area of ​​the air chamber 212 to the cross-sectional area of ​​the liquid injection chamber 211 is large. The specific ratio can be selected according to the actual injection volume requirements or determined through experiments.

[0043] like Figure 1 As shown, in another preferred embodiment, the outer surface of each airbag 13 is provided with an air port 14 protruding from the flexible mask 10, and the air port 14 is made of a flexible hose. The air needle 23 can inject gas into the airbag 13 through the air port 14, and an injection one-way valve that only allows gas to flow from the air needle 23 into the airbag 13 is provided at the air port 14.

[0044] Embodiment 2

[0045] The structure and principle of this embodiment are basically the same as those of the first embodiment, except that the scar repair device of this embodiment is targeted at hypertrophic scars and keloids. Hypertrophic scars are linear hypertrophic scars (such as those caused by surgery or trauma) and widely growing hypertrophic scars (such as those caused by burns or trauma), which are common subcategories in clinical practice. Keloids are a special type of pathological scars, which are characterized by a mass that is higher than the normal skin surface, beyond the scope of the original injury, and is continuously growing. They are hard in texture, have poor elasticity, and may be accompanied by itching or pain. They are characterized by tumor-like diseases with treatment resistance and high recurrence rate after treatment.

[0046] In this embodiment, the injection device 20 injects the repair drug into the skin through the flexible mask 10 of the injection area 12 via the injection needle 22. At the same time, the injection device 20 synchronously extracts the gas in the airbag 13 via the air needle 23, so that the airbag 13 shrinks inward along the thickness direction of the flexible mask 10. The amount of gas extracted from the airbag 13 is proportional to the injection amount of the injection needle 22 in the corresponding sub-interval 11.

[0047] The structure of the force applying mechanism 26 of the injection device 20 of this embodiment is different from that of the first embodiment. Figure 3 As shown, in the present embodiment, the force-applying mechanism 26 includes a first piston rod 261 fixedly connected to the rear end of the first piston 24, a second piston rod 262 fixedly connected to the rear end of the second piston 25, and a force-applying plate 263. The end of the first piston rod 261 away from the injection cylinder is fixedly connected to the force-applying plate 263, and the front end of the force-applying plate 263 is fixedly connected to a transmission rod 264 parallel to the second piston rod 262, the transmission rod 264 has a first rack segment, the second piston rod 262 has a second rack segment parallel to the first rack segment, and a transmission gear 265 is provided between the first rack segment and the second rack segment and is meshed with both and can rotate relative to the injection cylinder 21. For example, a guide seat 266 fixedly connected to the injection cylinder 21 is provided in the air chamber 212 or outside the air chamber 212, the transmission gear 265 is rotatably installed in the guide seat 266, the first rack segment on the transmission rod 264 is inserted into the guide seat and slidably connected thereto, and the second rack segment on the second piston rod 262 is inserted into the guide seat 266 and slidably connected thereto.

[0048] For hypertrophic scars, when the first piston rod 261 and the transmission rod 264 are pushed forward by the force plate 263, the first piston rod 261 causes the first piston 24 to slide forward in the syringe 21 to inject the repair drug, and the transmission rod 264 causes the second piston 25 to slide backward in the syringe 21 through the transmission gear 265 to extract the gas in the airbag 13. The sliding distances of the first piston 24 and the second piston 25 are equal, so that the air extraction amount of the airbag 13 is proportional to the injection amount of the injection needle 22 of the corresponding sub-interval 11. The cross-sectional area of ​​the airbag 13 is determined, and the air extraction amount can be obtained according to the distance of the inward expansion of the airbag 13. The ratio of the cross-sectional area of ​​the gas chamber 212 to the cross-sectional area of ​​the liquid injection chamber 211 is determined (that is, the air extraction amount is proportional to the liquid injection amount), and then the injection amount of the injection needle 22 can be determined.

[0049] In this embodiment, the gas port 14 is not provided with a gas injection check valve, but a gas extraction check valve which only allows gas to flow from the gas needle 23 into the gas bag 13 .

[0050] It should be noted that different scar types should be selected with corresponding flexible masks 10. For atrophic scars, a flexible mask 10 with an air injection check valve at the air port 14 should be selected; for hypertrophic scars, a flexible mask 10 with an air extraction check valve at the air port 14 should be selected.

[0051] Embodiment 3

[0052] This embodiment provides a repair method for scar repairing equipment for assisting burn plastic surgery based on the first and second embodiments, characterized in that it comprises the following steps:

[0053] S1. Determine whether the scar type is an atrophic scar or a hypertrophic scar / keloid. This can be determined by medical staff. For atrophic scars, injections of multiple types of repair drugs are used for combined treatment. For hypertrophic scars and keloids, injections of drugs that inhibit scar hyperplasia are used.

[0054] S2. Select the corresponding injection device according to the scar type. For atrophic scars, use an injection device that simultaneously injects gas into the air bag with an injection needle (i.e. Figure 2 The injection device shown in the figure), hypertrophic scars / keloids use an injection needle and an injection device that draws out the gas in the air bag during injection (i.e. Figure 3 injection device shown).

[0055] S3. Select a corresponding flexible mask according to the scar type. For atrophic scars, choose a flexible mask 10 with an injection check valve at the air port 14; for hypertrophic scars / keloids, choose a flexible mask 10 with an exhaust check valve at the air port 14; apply the flexible mask 10 to the skin of the burn area, that is, apply it to the scar, and the flexible mask 10 rises and falls with the skin.

[0056] S4. Connect the air needle 23 of the injection device 20 to the air port 14 of the air bag 13, aim the injection needle 22 at the injection area 12 of the sub-interval 11, and with the assistance of the magnifying device, the injection needle 22 passes through the injection area 12 of the flexible mask 10 and pierces the skin. Operate the injection device 20 to allow the injection needle 22 to slowly inject the repair drug into the skin. At the same time, the air needle 23 synchronously injects gas into / extracts gas from the air bag 13 to make the air bag 13 expand outward / contract inward along the thickness direction of the flexible mask 10 until the outer surface of the sub-interval 11 is flat with the outer surface of the adjacent injected sub-interval 11 (or roughly flat, which can be judged by the naked eye), and then stop the injection of the injection needle 22 and the air needle 23.

[0057] S5, disconnecting the air needle 23 from the air bag 13, and pulling out the injection needle 22.

[0058] S6, switching to the next sub-interval 11, repeating steps S4 and S5, until all sub-intervals 11 corresponding to the scar are injected.

[0059] Preferably, after step S6, the following step is further included: for the concave / convex sub-areas 11 on the surface of the airbag 13, supplementary injection is performed according to step S4 to check for leaks and fill in the gaps.

[0060] In the present invention, for atrophic scars, initially, all airbags 13 have no gas, and the airbags 13 are suffocated. The amount of injection of the injection needle 22 in the first sub-interval 11 can be determined based on experience, and an initial value can be set. For example, the first sub-interval 11 can be selected where the skin surface is relatively flat. During injection, the distance of the airbag 13 expanding outward is observed to know whether the injection amount of the injection needle 22 reaches the initial value. The second sub-interval 11 is preferably set adjacent to the first sub-interval 11, and the injection needle 22 and the gas are stopped until the outer surface of the sub-interval 11 is flat with the outer surface of the adjacent sub-interval 11 injected with the repair drug (or when it is roughly flat, it can be judged by naked eyes). When all sub-intervals 11 of the flexible mask 10 are injected, the outer surface of the flexible mask 10 is basically flat, so that the airbag 13 at the location of the deep scar has a large amount of gas injection, and the airbag 13 at the location of the shallow scar has a small amount of gas injection, thereby ensuring that the injection needle 22 at the deep scar has a large amount of injection, and the injection needle 22 at the shallow scar has a small amount of injection.

[0061] For hypertrophic scars and keloids, initially, there is gas in the airbag 13, and the amount of gas in each airbag 13 is equal, that is, the distance that each airbag 13 expands outward is equal, and the distance that the airbag 13 expands outward is greater than the height of the deepest part of the scar protruding from the skin, such as 1.5 times the height of the deepest part of the scar protruding from the skin, which can be determined experimentally. The amount of injection of the injection needle 22 in the first sub-interval 11 can be determined based on experience, and an initial value is set. For example, the first sub-interval 11 can be selected where the skin surface is relatively flat. During injection, observe the distance that the airbag 13 shrinks inward to know whether the injection amount of the injection needle 22 reaches the initial value. The second sub-interval 11 is preferably set adjacent to the first sub-interval 11, and the injection needle 22 and the air needle 23 extract gas until the outer surface of the sub-interval 11 is flat with the outer surface of the adjacent sub-interval 11 injected with the repair drug (or when it is roughly flat, it can be judged by naked eyes), and the injection of the injection needle 22 is stopped. When all sub-intervals 11 of the flexible mask 10 are injected, the outer surface of the flexible mask 10 is basically flat, so that the airbags 13 at the locations of deep marks can evacuate more air, and at the locations of shallow marks can evacuate less air, thereby ensuring that the injection needle 22 injects more air at the locations of deep marks, and injects less air at the locations of shallow marks.

[0062] It should be noted that, for the same patient, when there are both atrophic scars and hypertrophic scars / keloids, the corresponding flexible mask 10 and injection device 20 need to be selected to inject the repair drug, and the composition of the repair drug is determined according to the actual situation.

[0063] This scar repair device is mainly applicable to the hyperplasia and maturation stages of burn scars. For atrophic scars, the deeper the depression, the more injection volume is required. For hypertrophic scars / keloids, the higher the bulge, the more injection volume is required. This helps to inhibit the proliferation of scar tissue and enhance tissue repair.

[0064] In the description of this specification, the description with reference to the terms "preferred embodiment", "one embodiment", "some embodiments", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0065] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A scar repair device for assisting burn plastic surgery, characterized in that: The invention comprises an injection device and a flexible mask which can be applied to the skin surface and rise and fall with the skin, wherein the flexible mask is divided into a plurality of sub-areas, each of which has an injection area and an indication area, and the indication area is an air bag surrounding part or all of the injection area in the sub-area where the indication area is located, and the air bag is inflated / evacuated by the injection device, so that the air bag can expand outwards / contract inwards along the thickness direction of the flexible mask; The injection device has an injection needle and an air needle. The injection device injects repair drugs into the skin through the injection needle through the flexible mask of the injection area. At the same time, the injection device injects / extracts gas into the airbag through the air needle. The injection / extraction volume of the airbag is proportional to the injection volume of the injection needle in the corresponding sub-interval.

2. The scar repair device for assisting burn plastic surgery according to claim 1, characterized in that: The injection device comprises an injection cylinder, wherein the injection cylinder has a liquid injection chamber and a gas chamber arranged side by side, the injection needle is installed at the front end of the liquid injection chamber and communicated with the inside of the liquid injection chamber, the gas needle is installed at the front end of the gas chamber and communicated with the inside of the gas chamber, and the first piston and the second piston are slidably connected in the liquid injection chamber and the gas chamber respectively; The first piston and the second piston are both connected to a force-applying mechanism, through which the first piston moves forward to inject the repair drug, while the second piston can synchronously move forward to inject gas into the airbag or move backward to extract the gas in the airbag.

3. The scar repair device for assisting burn plastic surgery according to claim 2, characterized in that: The force applying mechanism comprises a first piston rod fixedly connected to the rear end of the first piston, a second piston rod fixedly connected to the rear end of the second piston, and a force applying plate; When the first piston moves forward and the second piston moves forward synchronously, the ends of the first piston rod and the second piston rod away from the injection cylinder are both fixedly connected to the force application plate; When the first piston moves forward and the second piston moves backward synchronously, the end of the first piston rod away from the injection cylinder is fixedly connected to the force plate, and a transmission rod parallel to the second piston rod is fixedly connected to the force plate, and the transmission rod has a first rack segment, and the second piston rod has a second rack segment parallel to the first rack segment, and a transmission gear is provided between the first rack segment and the second rack segment, which is meshed with both and can rotate relative to the injection cylinder.

4. The scar repair device for assisting burn plastic surgery according to claim 2, characterized in that: At least one injection needle is provided at the front end of the liquid injection bin. When multiple injection needles are provided, the multiple injection needles are distributed in an array.

5. The scar repair device for assisting burn plastic surgery according to claim 1, characterized in that: The outer surface of each airbag is provided with an air port protruding from the flexible mask, and the air needle can inject gas into the airbag / extract gas from the airbag through the air port. The air port is provided with an injection one-way valve that only allows gas to flow from the air needle into the airbag / an extraction one-way valve that only allows gas to flow from the airbag to the air needle.

6. The scar repair device for assisting burn plastic surgery according to claim 5, characterized in that: The gas port is made of a flexible hose.

7. A scar repair device for assisting burn plastic surgery according to any one of claims 1 to 6, characterized in that: The injection area is located in the middle of the sub-area, and the airbag is an annular airbag surrounding the injection area.

8. A method for repairing scars based on the scar repair device for assisting burn plastic surgery according to any one of claims 1 to 7, characterized in that: The steps include: S1. Determine whether the scar is an atrophic scar or a hypertrophic scar / keloid. S2. Select the corresponding injection device according to the scar type. For atrophic scars, use an injection device that uses an injection needle and an air needle to inject gas into the air bag simultaneously. For hypertrophic scars / keloids, use an injection device that uses an injection needle and an air needle to extract the gas in the air bag during injection. S3. Select a corresponding flexible mask according to the scar type, apply the flexible mask to the skin of the burn area, and the flexible mask rises and falls with the skin; S4. Connect the air needle to the air bag, aim the injection needle at the injection area of ​​the sub-interval, and with the assistance of the magnifying device, pierce the skin through the injection area of ​​the flexible mask, operate the injection device, and slowly inject the repair drug into the skin with the injection needle. At the same time, the air needle synchronously injects gas into the air bag / extracts gas from the air bag, so that the air bag expands outward / contracts inward along the thickness direction of the flexible mask, until the outer surface of the sub-interval is flat with the outer surface of the adjacent injected sub-interval, and then stop the injection of the injection needle; S5, disconnect the air needle from the air bag and pull out the injection needle; S6. Switch to the next sub-interval and repeat steps S4 and S5 until all sub-intervals corresponding to the scar are injected.

9. The repair method according to claim 8, characterized in that: The following step is also included after step S6: for the concave / convex sub-intervals on the airbag surface, supplementary injection is performed according to step S4.

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