Devices for skin expansion

Abstract

The present invention relates to the technical field of medical devices, and in particular to a device for skin expansion, comprising a first expander, a liquid storage bottle, an infusion line and a pressure detection assembly; the first expander is suitable for implantation on the lower surface of human skin. The liquid storage bottle is used to store expansion fluid. One end of the infusion line is connected to the liquid storage bottle, and the other end is connected to the interior of the first expander. The pressure detection assembly can be connected to the interior of the first expander to detect the pressure inside the first expander. Each time the expansion fluid is added to the first expander, the pressure inside the first expander is detected by the pressure detection assembly, which is conducive to maintaining a moderate pressure in the first expander, avoiding muscle necrosis caused by compression of the first expander, shortening the period of obtaining "extra" skin, and not introducing bacteria or other impurities into the expansion fluid, reducing surgical risks.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, and in particular to a device for skin expansion. Background Art

[0002] Expanders are related to the field of plastic surgery. The principle is to implant the expander under the human skin and regularly inject expansion fluid into the expander to expand the expander, so that the skin above the expander is continuously stretched and the area is continuously increased to obtain "extra" skin. This "extra" skin can be used to repair the skin of other parts or reconstruct organs.

[0003] Usually, the amount of expansion fluid added to the expander each time is controlled by the operator based on experience, and different human bodies have different absorption efficiencies for the expansion fluid in the expander, resulting in the actual pressure in the expander being unknown. If the pressure in the expander is too high, it will compress the muscles and cause necrosis; if the pressure in the expander is too low, it will take a long time to obtain the "extra" skin. Since the expansion fluid is required to be a sterile liquid, it is not suitable to install the pressure detection sensor or its probe directly in the expander to obtain the pressure in the expander, so as to avoid introducing bacteria or other impurities into the expansion fluid, which will invisibly increase the risk of surgery.

[0004] Therefore, how to effectively obtain the pressure inside the expander becomes a technical problem that needs to be solved urgently by those skilled in the art. Summary of the invention

[0005] The invention provides a device for skin expansion, which is used to solve the problem of how to effectively obtain the pressure in the expander.

[0006] The present invention provides a device for skin expansion, comprising:

[0007] A first expander, adapted to be implanted under the skin of a human body;

[0008] A storage bottle, used to store expansion fluid;

[0009] an infusion line, one end of which is connected to the liquid storage bottle, and the other end of which is connected to the interior of the first expander;

[0010] The pressure detection component can be communicated with the interior of the first expander and is used to detect the pressure inside the first expander.

[0011] In some embodiments, the pressure detection component includes:

[0012] The buffer bottle has a liquid inlet at the bottom and an exhaust port at the top;

[0013] a first switch valve, the input end of which is connected to the interior of the first expander, and the output end of which is connected to the liquid inlet;

[0014] A pressure detection sensor is connected to the exhaust port;

[0015] Breathable waterproof membrane, installed at the exhaust port.

[0016] In some embodiments, the infusion circuit includes:

[0017] The second switch valve, the input end of which is connected to the liquid storage bottle through the infusion tube;

[0018] One end of the first peristaltic pump is communicated with the output end of the second switch valve, and the other end is communicated with the interior of the first expander.

[0019] In some embodiments, it also includes:

[0020] The compensating pipeline has one end connected to the liquid storage bottle and the other end connected to the interior of the first expander.

[0021] In some embodiments, the compensating circuit includes:

[0022] The third switch valve, the input end of which is connected to the liquid storage bottle through a compensation tube;

[0023] A second peristaltic pump, one end of which is connected to an output end of the third switch valve;

[0024] One end of the first proportional valve is communicated with the other end of the second peristaltic pump, and the other end is communicated with the interior of the first expander.

[0025] In some embodiments, it also includes:

[0026] Environmental simulator;

[0027] a second expander, installed in the environmental simulator;

[0028] A parallel tube, one end of which is connected to the interior of the first expander, the other end of which is connected to the interior of the second expander, and the middle part of which is connected to the end of the infusion pipeline away from the liquid storage bottle;

[0029] The pressure detection assembly is communicated with the first expander through the second expander.

[0030] In some embodiments, it also includes:

[0031] a third peristaltic pump, one end of which is in communication with the interior of the second expander;

[0032] One end of the second proportional valve is communicated with the other end of the third peristaltic pump, and the other end is communicated with the interior of the second expander.

[0033] In some embodiments, it also includes:

[0034] The controller is electrically connected to the pressure detection component and the infusion pipeline respectively.

[0035] The beneficial effects of the present invention are as follows: the device for skin expansion of the present invention is provided with a pressure detection component, which can be connected to the interior of the first expander to detect the pressure in the first expander. Each time the expansion fluid is added to the first expander, the pressure in the first expander is detected by the pressure detection component, which is conducive to maintaining a moderate pressure in the first expander, avoiding muscle necrosis caused by compression of the first expander, shortening the period of obtaining "extra" skin, and not introducing bacteria or other impurities into the expansion fluid, thereby reducing surgical risks. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a schematic structural diagram of some specific embodiments of a device for skin expansion of the present invention;

[0037] Figure 2 Schematic diagrams of structures of other specific embodiments of a device for skin expansion according to the present invention;

[0038] Figure 3 It is a schematic structural diagram of some specific embodiments of a device for skin expansion of the present invention.

[0039] In the accompanying drawings, 110, the first expander; 120, the liquid storage bottle; 130, the infusion pipeline; 131, the second switch valve; 132, the first peristaltic pump; 140, the pressure detection component; 141, the first switch valve; 142, the buffer bottle; 143, the pressure detection sensor; 144, the breathable and waterproof membrane; 150, the compensation pipeline; 151, the third switch valve; 152, the second peristaltic pump; 153, the first proportional valve; 160, the environmental simulator; 170, the second expander; 180, the parallel tube; 181, the cut-off valve; 191, the third peristaltic pump; 192, the second proportional valve. DETAILED DESCRIPTION

[0040] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the 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.

[0041] As described in the background technology, the amount of expansion fluid added to the expander each time is controlled by the operator based on experience, and different human bodies have different absorption efficiencies for the expansion fluid in the expander, resulting in the actual pressure in the expander being unknown. If the pressure in the expander is too high, it will compress the muscles and cause necrosis; if the pressure in the expander is too low, it will take a long time to obtain the "extra" skin. Since the expansion fluid is required to be a sterile liquid, it is not suitable to directly install a pressure detection sensor or its probe in the expander to obtain the pressure in the expander, so as to avoid introducing bacteria or other impurities into the expansion fluid, which will invisibly increase the risk of surgery. Therefore, how to effectively obtain the pressure in the expander has become a technical problem that needs to be solved urgently by those skilled in the art.

[0042] To improve the above problems, refer to Figure 1 The present invention provides a device for skin expansion, including a first expander 110, a liquid storage bottle 120, an infusion line 130 and a pressure detection component 140. The first expander 110 is suitable for implantation on the lower surface of human skin. The liquid storage bottle 120 is used to store expansion fluid. It should be noted that the expansion fluid can be physiological saline or the like. One end of the infusion line 130 is connected to the liquid storage bottle 120, and the other end is connected to the inside of the first expander 110. The expansion fluid from the liquid storage bottle 120 flows into the expander through the infusion line 130. The pressure detection component 140 can be connected to the inside of the first expander 110 to detect the pressure inside the first expander 110. After each expansion fluid is added to the first expander 110, the pressure detection component 140 detects the pressure inside the first expander 110, which is conducive to maintaining a moderate pressure inside the first expander 110, avoiding muscle necrosis caused by compression of the first expander 110, shortening the period of obtaining "extra" skin, and not introducing bacteria or other impurities into the expansion fluid, reducing surgical risks.

[0043] Specifically, in the exemplary embodiment, the pressure detection assembly 140 includes a buffer bottle 142, a first switch valve 141, a pressure detection sensor 143 and a breathable waterproof membrane 144. The buffer bottle 142 is provided with a liquid inlet at the bottom and an exhaust port at the top. The input end of the first switch valve 141 is connected to the interior of the first dilator 110, and the output end is connected to the liquid inlet. The pressure detection sensor 143 is connected to the exhaust port for detecting pressure. The breathable waterproof membrane 144 is installed at the exhaust port and has a breathable, waterproof and bacteria-proof function. Each time the expansion fluid is added to the dilator, the first switch valve 141 is always in an open state so that the pressure detection sensor 143 can detect the pressure in the dilator. The infusion pipeline 130 includes a second switch valve 131 and a first peristaltic pump 132. The input end of the second switch valve 131 is connected to the liquid storage bottle 120 through an infusion tube. One end of the first peristaltic pump 132 is connected to the output end of the second switch valve 131, and the other end is connected to the interior of the first dilator 110. The first peristaltic pump 132 provides power for the expansion fluid to flow into the first expander 110. Each time the expansion fluid is added into the first expander 110, the second switch valve 131 is always in an open state.

[0044] In other embodiments, such as Figure 2 As shown, the device for skin expansion includes a first expander 110, a liquid storage bottle 120, an infusion line 130, a pressure detection component 140 and a compensation line 150. The first expander 110 is suitable for implantation on the lower surface of human skin. The liquid storage bottle 120 is used to store expansion liquid. One end of the infusion line 130 is connected to the liquid storage bottle 120, and the other end is connected to the interior of the first expander 110. The pressure detection component 140 can be connected to the interior of the first expander 110 for detecting the pressure inside the first expander 110. After the expansion liquid is added to the expander, the pressure inside the first expander 110 is detected by the pressure detection component 140. One end of the compensation line 150 is connected to the liquid storage bottle 120, and the other end is connected to the interior of the first expander 110. Assuming that the target pressure value in the first expander 110 is a, a certain amount of expansion liquid is first input into the first expander 110 by the infusion line 130, so that the pressure in the first expander 110 reaches b, and b is less than a. Then, a certain amount of expansion fluid is input into the first expander 110 through the compensation pipeline 150 so that the pressure value in the first expander 110 reaches a.

[0045] Specifically, in the exemplary embodiment, the compensation pipeline 150 includes a third switch valve 151, a second peristaltic pump 152 and a first proportional valve 153. The input end of the third switch valve 151 is connected to the liquid storage bottle 120 through the compensation tube. One end of the second peristaltic pump 152 is connected to the output end of the third switch valve 151. One end of the first proportional valve 153 is connected to the other end of the second peristaltic pump 152, and the other end is connected to the inside of the first expander 110. The third switch valve 151 controls the on-off of the compensation pipeline 150. The pressure detection sensor 143 of the pressure detection assembly 140 obtains the pressure in the first expander 110 every 0.05 seconds. Assuming that the pressure values ​​obtained by the pressure detection sensor 143 are c1, c2, c3..., the difference between the target pressure value and the pressure value obtained by the pressure detection sensor 143 is a-c1, a-c2, a-c3..., and the opening of the first proportional valve 153 is adjusted to (a-c1) / a, (a-c2) / a, (a-c3) / a...

[0046] In some other embodiments, Figure 3As shown, the device for skin expansion includes a first expander 110, a liquid storage bottle 120, an infusion line 130, a pressure detection component 140, an environmental simulator 160, a second expander 170, a parallel tube 180, a third peristaltic pump 191 and a second proportional valve 192. The first expander 110 is suitable for implantation on the lower surface of human skin. The liquid storage bottle 120 is used to store expansion liquid. One end of the infusion line 130 is connected to the liquid storage bottle 120. The environmental simulator 160 is used to simulate the environment in which the first expander 110 is located. A skin bionic layer is provided on the upper part of the environmental simulator 160, and a muscle bionic layer is provided on the lower part. The material of the skin bionic layer and the muscle bionic layer is an elastomer. The second expander 170 is installed in the environmental simulator 160, and is located below the skin bionic layer and above the muscle bionic layer. One end of the parallel tube 180 is connected to the interior of the first dilator 110, the other end is connected to the interior of the second dilator 170, and the middle part is connected to the end of the infusion pipeline 130 away from the liquid storage bottle 120. A cut-off valve 181 is provided on the parallel tube 180. The pressure detection component 140 is connected to the first dilator 110 through the second dilator 170 and the parallel tube 180. After the expansion fluid is added to the first dilator 110 and the second dilator 170, the pressure detection component 140 detects the pressure in the second dilator 170 to obtain the pressure in the first dilator 110. One end of the third peristaltic pump 191 is connected to the interior of the second dilator 170. One end of the second proportional valve 192 is connected to the other end of the third peristaltic pump 191, and the other end is connected to the interior of the second dilator 170. Assuming that the target pressure value in the first dilator 110 and the second dilator 170 is d, a certain amount of dilator fluid is first input into the first dilator 110 and the second dilator 170 by the infusion pipeline 130, so that the pressure in the first dilator 110 and the second dilator 170 reaches e respectively, and e is less than d. Then, the parallel tube 180 is in a cut-off state by means of the cut-off valve 181. Then, a certain amount of dilator fluid in the second dilator 170 is transferred to the first dilator 110 by the third peristaltic pump 191, so that the pressure value in the first dilator 110 reaches d. The pressure detection sensor 143 of the pressure detection assembly 140 obtains the pressure in the second dilator 170 every 0.05 seconds. Assuming that the pressure values ​​obtained by the pressure detection sensor 143 are f1, f2, f3... in sequence, then the difference between the target pressure value and the pressure value obtained by the pressure detection sensor 143 is 2e-f1, 2e-f2, 2e-f3... in sequence, and the opening of the second proportional valve 192 is adjusted to [d-(2e-f1)] / d, [d-(2e-f2)] / d, [d-(2e-f3)] / d... in sequence.

[0047] Specifically, in the exemplary embodiment, the device for skin expansion further includes a controller. The controller is electrically connected to the pressure detection sensor 143 of the pressure detection assembly 140 and the first peristaltic pump 132 of the infusion pipeline 130. When the device for skin expansion further includes a compensation pipeline 150, the controller is also electrically connected to the first proportional valve 153 and the second peristaltic pump 152. When the device for skin expansion further includes a third peristaltic pump 191 and a second proportional valve 192, the controller is also electrically connected to the third peristaltic pump 191 and the second proportional valve 192. The controller can receive the pressure signal detected by the pressure detection sensor 143, and control the first peristaltic pump 132, the second peristaltic pump 152, the third peristaltic pump 191, the first proportional valve 153, and the second proportional valve 192 according to the pressure signal and the target pressure value. The first switch valve 141, the second switch valve 131 and the cut-off valve 181 are manual valves, and their on and off are manually controlled.

[0048] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0049] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0050] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0051] In the present invention, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. mean 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 representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0052] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A device for skin expansion, characterized in that: include: A first expander, adapted to be implanted under the skin of a human body; A storage bottle, used to store expansion fluid; an infusion line, one end of which is connected to the liquid storage bottle, and the other end of which is connected to the interior of the first expander; a pressure detection assembly capable of communicating with the interior of the first expander and used for detecting the pressure inside the first expander; Environmental simulator; a second expander, installed in the environmental simulator; A parallel tube, one end of which is connected to the interior of the first expander, the other end of which is connected to the interior of the second expander, and the middle part of which is connected to the end of the infusion pipeline away from the liquid storage bottle; The pressure detection assembly is in communication with the first expander through the second expander; a third peristaltic pump, one end of which is in communication with the interior of the second expander; The second proportional valve has one end connected to the other end of the third peristaltic pump and the other end connected to the interior of the first expander.

2. The device for skin expansion according to claim 1, characterized in that The pressure detection component comprises: The buffer bottle has a liquid inlet at the bottom and an exhaust port at the top; a first switch valve, an input end of which is in communication with the interior of the first expander, and an output end of which is in communication with the liquid inlet; a pressure detection sensor, connected to the exhaust port; A breathable and waterproof membrane is installed at the exhaust port.

3. The device for skin expansion according to claim 1, characterized in that The infusion pipeline comprises: A second switch valve, the input end of which is connected to the liquid storage bottle through an infusion tube; The first peristaltic pump has one end connected to the output end of the second switch valve and the other end connected to the interior of the first expander.

4. The device for skin expansion according to any one of claims 1 to 3, characterized in that: Also includes: The controller is electrically connected to the pressure detection component and the infusion pipeline respectively.

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