Negative pressure wound treatment device integrating perfusion and oxygen therapy

Abstract

The invention discloses a negative pressure wound treatment device integrating perfusion and oxygen therapy, and belongs to the technical field of negative pressure wound treatment. The device comprises a device shell, an oxygen tank is arranged on the device shell, two symmetrically-folded layered composite dressing plates are arranged at the upper end of a connecting pipe, a three-way valve and a one-way valve are installed at the rear ends of the two layered composite dressing plates respectively, and the three-way valve is connected with a negative pressure pipe and an air guide pipe. The problems that an existing negative-pressure wound treatment device cannot achieve cooperative operation, and consequently the clinical safety and the chronic refractory wound treatment effect are poor are solved, the control module is adopted for controlling the peristaltic pump, the oxygen pump and the negative-pressure pump respectively, diversified treatment is conducted in cooperation with the three-way valve and the one-way valve, and the treatment efficiency is improved. The two integrated layered composite dressing plates are used for treating wounds, have four modes of continuous drainage, intermittent drainage, dynamic drainage and perfusion treatment, and are adaptive to different wound depths and exudation conditions.

Description

Technical Field

[0001] This invention relates to the field of negative pressure wound therapy technology, specifically to a negative pressure wound therapy device that integrates perfusion and oxygen therapy. Background Technology

[0002] Negative pressure wound therapy is a widely used wound treatment method in clinical practice. It usually involves covering the wound with a sponge dressing with a drainage tube, then sealing it with a film, and connecting the drainage tube to a negative pressure source to create a negative pressure environment. This allows necrotic tissue and exudate to be drained from the wound through the drainage tube, creating a favorable growth environment for wound repair and subsequent recovery.

[0003] Chinese Patent CN115486989B discloses a negative pressure wound therapy device, comprising a negative pressure drug delivery device, several combined membrane patches, several negative pressure connecting tubes, and several drug delivery connecting tubes. This patent isolates the wound from the external environment by using a single or multiple combined membrane patches, preventing external bacteria from invading the wound and reducing the infection rate. The combined membrane patches are transparent, allowing observation of the wound area, facilitating wound treatment by medical personnel. The negative pressure drug delivery device is connected to the negative pressure mechanism via the negative pressure connecting tubes, providing a negative pressure environment to the wound. This negative pressure draws out excess tissue fluid from the wound, ensuring wound dryness while promoting the regeneration of fresh tissue and accelerating wound healing.

[0004] The negative pressure wound therapy device mentioned above cannot achieve coordinated operation in actual use, resulting in poor clinical safety and treatment effect on chronic and difficult-to-heal wounds; therefore, it does not meet the existing needs. In response, we propose a negative pressure wound therapy device that integrates perfusion and oxygen therapy. Summary of the Invention

[0005] The purpose of this invention is to provide a negative pressure wound therapy device that integrates perfusion and oxygen therapy, which solves the problems mentioned in the background art, such as the inability of negative pressure wound therapy devices to achieve coordinated operation in actual use, resulting in poor clinical safety and treatment effects for chronic and refractory wounds.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a negative pressure wound therapy device integrating perfusion and oxygen therapy, comprising a device housing, an oxygen tank on the device housing, a connecting pipe on one side below the device housing, two symmetrically folded layered composite dressing plates at the upper end of the connecting pipe, a three-way valve and a one-way valve respectively installed at the rear ends of the two layered composite dressing plates, the three-way valve being connected to a negative pressure pipe and an air delivery pipe respectively, an perfusion pipe being provided at the rear end of the one-way valve, and a sensor group being provided inside the device housing.

[0007] Preferably, an operation screen is provided at the upper end of the device housing, and a control module is installed inside the device housing. The control module includes an STM32 microcontroller, which is used to connect to a sensor group, which includes a negative pressure sensor, a flow sensor, an oxygen concentration sensor, a liquid level sensor, and a temperature sensor. The operation screen is electrically connected to the control module.

[0008] Preferably, a support base is fixedly installed on the upper end of the device housing, a support rod is rotatably connected to the upper end of the support base, and a hook is welded to the upper end of the support rod for hanging oxygen cylinders.

[0009] Preferably, an oxygen pump is fixedly connected to the upper end of the device housing, the oxygen pump is sealed to the valve port of the oxygen tank, and the outlet of the oxygen pump is sealed to the air delivery pipe.

[0010] Preferably, an electric valve is installed at the lower end of the connecting pipe, a flexible hose is provided at the upper end of the connecting pipe, a manifold is fixedly connected to the upper end of the flexible hose, the injection pipe and the negative pressure pipe pass through the manifold, the flexible hose and the connecting pipe respectively and are sealed to the electric valve, and a limit frame is fixedly connected to the lower end of the flexible hose, and the limit frame is fixedly connected to the device housing.

[0011] Preferably, a connecting arm is fixedly installed on the upper end of the device housing, one end of the connecting arm is movably connected to the upper end of the hose through a sleeve, and the electric valve is fixedly connected to the device housing inside the device housing.

[0012] Preferably, a protective plate is installed on one side of the inner side of the device housing, and a filter plate is installed at the lower end of the protective plate. The filter plate is connected to an electric valve. A treatment fluid tank is provided inside the device housing. A peristaltic pump is installed on one side of the treatment fluid tank. A negative pressure pump is provided at the rear end of the peristaltic pump. The peristaltic pump is connected to the filter plate. The negative pressure pump is connected to the air guide pipe through the electric valve.

[0013] Preferably, an outer sealing gasket is provided on the outside of the two layered composite dressing plates, the outer sealing gasket is sealed to the two layered composite dressing plates, and a silicone gasket is provided between the two layered composite dressing plates to seal the space between the two layered composite dressing plates. A hinge shaft is installed between the two layered composite dressing plates, and the two layered composite dressing plates are hinged together by the hinge shaft.

[0014] Preferably, each of the two layered composite dressing plates has a wound contact layer at its front end, and an integrally formed irrigation fluid outlet hole is provided at the edge of the wound contact layer. The interior of each layered composite dressing plate is provided with an air guide hood and a diversion inlet pipe, which are respectively connected to the wound contact layer and a one-way valve. A spring sleeve is installed at the rear end of the air guide hood, and the spring sleeve is respectively connected to the three-way valve of the air guide hood.

[0015] Preferably, an electric motor is installed at the rear end of the three-way valve, a drive shaft is connected to the front end of the electric motor, two valve plates are installed on the outside of the drive shaft, an air extraction port and an oxygen delivery port are provided inside the three-way valve, the two valve plates are respectively sealed to the air extraction port and the oxygen delivery port, and a connecting seat is installed at the rear end of both the one-way valve and the three-way valve, and both the one-way valve and the three-way valve are respectively fixedly connected to two layered composite dressing plates through the connecting seat.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. This invention employs a control module to separately control the peristaltic pump, oxygen pump, and negative pressure pump, along with a three-way valve and a one-way valve for diversified processing. Two integrated layered composite dressing plates are used for wound treatment, enabling precise therapy. It features four modes: continuous drainage, intermittent drainage, dynamic drainage, and irrigation therapy, adapting to different wound depths and exudation levels. The negative pressure, irrigation, and oxygen therapy lines are independent and integrated, avoiding liquid-gas mixing and contamination. Irrigation and oxygen therapy must be synchronized with the negative pressure suction sequence; the negative pressure is reduced or paused during irrigation, and oxygen is prevented from being directly drawn away by the negative pressure during oxygen therapy. It meets the needs of prolonged surgery and mobile treatment, is compact, and suitable for use in various hospital settings. It is used to remove secretions and necrotic tissue from cavities or wounds, improve local microcirculation, promote tissue edema reduction, control infection, and promote healthy granulation tissue growth. Balancing therapeutic efficacy, ease of operation, and clinical safety, it is suitable for the comprehensive treatment of chronic, refractory wounds.

[0018] 2. The layered composite dressing of the present invention can seal the wound by having the wound contact layer contact the wound surface and the outer sealing pad layer contact the skin surface. Irrigation and oxygen therapy need to be matched with the negative pressure suction sequence. The wound contact layer is made of porous silicone or hydrophilic polyurethane membrane, with irrigation fluid outlet holes of 0.1 to 0.3 mm in diameter distributed on the membrane, evenly distributed at the edge of the wound contact layer, and oxygen diffusion holes densely distributed in the central area to ensure that the irrigation fluid evenly infiltrates the wound surface and oxygen diffuses efficiently to the tissue. The use of two foldable layered composite dressing plates can meet the needs of wound treatment in various locations. It has a simple structure, complete functions, and good adaptability. Attached Figure Description

[0019] Figure 1 This is an isometric view of the side view of the present invention;

[0020] Figure 2 For the present invention Figure 1 Enlarged view of a portion of area A in the middle;

[0021] Figure 3 This is a diagram showing the internal structure of the three-way valve of the present invention;

[0022] Figure 4 This is an axonometric view of the rear view of the present invention;

[0023] Figure 5 This is an isometric view of the front view of the layered composite dressing plate of the present invention;

[0024] Figure 6 This is a schematic diagram of the internal structure of the layered composite dressing plate of the present invention.

[0025] In the diagram: 1. Device housing; 101. Control panel; 102. Support base; 103. Support rod; 104. Hook; 105. Connecting arm; 106. Control module; 107. Protective plate; 108. Treatment fluid tank; 109. Peristaltic pump; 110. Negative pressure pump; 111. Filter plate; 2. Oxygen tank; 201. Oxygen pump; 202. Gas delivery pipe; 3. Connecting pipe; 301. Infusion pipe; 302. Manifold bend; 303. Negative pressure pipe; 304. Electricity 305. Pulsating valve; 306. Limiting frame; 4. Hoses; 5. Layered composite dressing plate; 401. Wound contact layer; 402. Three-way valve; 403. Electric motor; 404. Drive shaft; 405. Valve plate; 406. Air extraction port; 407. Connecting seat; 408. One-way valve; 409. Outer sealing gasket layer; 410. Hinge shaft; 411. Silicone pad; 412. Irrigation fluid outlet hole; 413. Diverting inlet pipe; 414. Air guide hood; 415. Spring sleeve. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0027] To address the issues of existing negative pressure wound therapy devices failing to achieve coordinated operation in practical use, leading to clinical safety concerns and poor treatment outcomes for chronic, refractory wounds, please refer to [link to relevant documentation]. Figure 1 - Figure 6 This embodiment provides the following technical solution:

[0028] This embodiment of a negative pressure wound therapy device integrating perfusion and oxygen therapy includes a device housing 1, an oxygen tank 2 mounted on the housing 1, a connecting pipe 3 located on one side below the housing 1, and two symmetrically folded layered composite dressing plates 4 at the upper end of the connecting pipe 3. A three-way valve 402 and a one-way valve 408 are respectively installed at the rear ends of the two layered composite dressing plates 4. The one-way valve 408 only allows oxygen to flow from the oxygen tank 2 to the dressing. The connector and the outer film are sealed by heat fusion to ensure no leakage of the negative pressure environment. The three-way valve 402 is connected to a negative pressure pipe 303 and an air delivery pipe 202. An perfusion pipe 301 is located at the rear end of the one-way valve 408. A sensor group is installed inside the device housing 1. The negative pressure, perfusion, and oxygen therapy pipelines are independent and integrated to avoid liquid and gas mixing and contamination. The perfusion and oxygen therapy must be matched with the negative pressure suction sequence. During perfusion, the negative pressure is reduced or paused, and during oxygen therapy, oxygen is prevented from being directly sucked away by the negative pressure.

[0029] This integrated negative pressure wound therapy device combines perfusion and oxygen therapy, employing multi-mode precision treatment. It features four modes: continuous drainage, intermittent drainage, dynamic drainage, and perfusion therapy. The negative pressure adjustment range is 25-250 mmHg, supporting high, medium, and low intensity levels to adapt to different wound depths and exudation levels. It boasts an intelligent safety design with built-in voice alarms for blockage, full bottle, leakage, and low battery, along with real-time pressure display and overpressure protection to reduce medical risks. Utilizing the WA1000 / WA800, it supports remote alarm information upload for easy information management. The WA1000 / WA800 offers long battery life and portability, meeting the needs of prolonged surgery and mobile treatment. Its compact size makes it suitable for various hospital scenarios, removing secretions and necrotic tissue from cavities or wounds, improving local microcirculation, promoting tissue edema reduction, controlling infection, and promoting healthy granulation tissue growth.

[0030] An operation screen 101 is provided on the upper end of the device housing 1, and a control module 106 is installed inside the device housing 1. The control module 106 includes an STM32 microcontroller, and the STM32 microcontroller is used to connect to a sensor group, which includes a negative pressure sensor, a flow sensor, an oxygen concentration sensor, a liquid level sensor, and a temperature sensor. The operation screen 101 is electrically connected to the control module 106.

[0031] An oxygen pump 201 is fixedly connected to the upper end of the device housing 1. The oxygen pump 201 is sealed to the valve port of the oxygen tank 2. The outlet of the oxygen pump 201 is sealed to the air guide pipe 202. The electromagnetic proportional valve installed under the oxygen tank 2 adjusts the flow rate to 0.5-2L / min. The pressure sensor is used to ensure stable output.

[0032] An electric valve 304 is installed at the lower end of the connecting pipe 3, and a hose 306 is provided at the upper end of the connecting pipe 3. A manifold 302 is fixedly connected to the upper end of the hose 306. The injection pipe 301 and the negative pressure pipe 303 pass through the manifold 302, the hose 306 and the connecting pipe 3 respectively and are sealed to the electric valve 304. A limit frame 305 is fixedly connected to the lower end of the hose 306. The limit frame 305 is fixedly connected to the device housing 1.

[0033] A protective plate 107 is installed on one side of the inner side of the device housing 1. A filter plate 111 is installed at the lower end of the protective plate 107. The filter plate 111 is connected to an electric valve 304. A treatment fluid tank 108 is installed inside the device housing 1. The treatment fluid tank 108 has a built-in filter membrane to prevent liquid backflow into the pump body. A liquid level sensor is also installed to automatically stop the pump and trigger an alarm when the liquid level is full. A drain valve is designed at the bottom of the treatment fluid tank 108 for easy waste liquid disposal. A peristaltic pump 109 is installed on one side of the treatment fluid tank 108. A negative pressure pump 110 is installed at the rear end of the peristaltic pump 109. The peristaltic pump 109 is connected to the filter plate 111. The filter plate 111 has pores with a diameter of 1mm. The anti-clogging filter, with a pore size of 1mm, works in conjunction with negative pressure pulses to instantly increase negative pressure and clear minor blockages. The negative pressure pump 110 is connected to the air delivery tube 202 via an electric valve 304. During peristaltic pump 109 irrigation, the control module 106 automatically reduces the negative pressure to -20 to -30 mmHg to prevent the treatment fluid from being immediately sucked away. After irrigation, the control module 106 restores the set negative pressure of the negative pressure pump 110 after a delay of 5 to 10 minutes to ensure that the fluid fully acts on the wound. The control module 106 also monitors the irrigation volume in real time through a flow sensor and compares it with the preset value. If the volume is exceeded, the peristaltic pump 109 is automatically stopped, achieving precise linkage between negative pressure, irrigation, and oxygen therapy.

[0034] The negative pressure pump 110 is set to -25 to -250 mmHg, with an interval of -25 mmHg. The negative pressure pump 110 operates at full power, and the negative pressure pumping speed is not less than 8 L / min. The peristaltic pump 109, oxygen pump 201 and negative pressure pump 110 realize continuous drainage mode, intermittent drainage mode and dynamic drainage mode.

[0035] Specifically, during use, the control module 106 controls the peristaltic pump 109, oxygen pump 201, and negative pressure pump 110 respectively, and is equipped with a three-way valve 402 and a one-way valve 408 for diversified treatment. The integrated two-layer composite dressing plates 4 are used to treat the wound, enabling precise treatment. It has four modes: continuous drainage, intermittent drainage, dynamic drainage, and irrigation therapy, which are suitable for different wound depths and exudation conditions. The negative pressure, irrigation, and oxygen therapy pipelines are independent and integrated to avoid liquid and gas mixing and contamination. Irrigation and oxygen therapy must be matched with the timing of negative pressure suction. The negative pressure is reduced or paused during irrigation, and oxygen is prevented from being directly sucked away by the negative pressure during oxygen therapy. It meets the needs of long-term surgery and mobile treatment. It is compact and suitable for use in multiple hospital scenarios. It is used to remove secretions and necrotic tissue from cavities or wounds, improve local microcirculation, promote the reduction of tissue edema, control infection, and promote the healthy growth of granulation tissue. It takes into account the therapeutic effect, ease of operation, and clinical safety, and is suitable for the comprehensive treatment of chronic and difficult-to-heal wounds.

[0036] To address the issues of existing negative pressure wound therapy devices, such as their inability to achieve coordinated operation, cumbersome structure, and poor adaptability in practical use, please refer to... Figure 1 - Figure 6 This embodiment provides the following technical solution:

[0037] In this embodiment, a support base 102 is fixedly installed on the upper end of the device housing 1, and a support rod 103 is rotatably connected to the upper end of the support base 102. A hook 104 is welded to the upper end of the support rod 103, and the hook 104 is used to hang the oxygen tank 2.

[0038] A connecting arm 105 is fixedly installed on the upper end of the device housing 1. One end of the connecting arm 105 is movably connected to the upper end of the hose 306 through a sleeve. The electric valve 304 is fixed inside the device housing 1 and is fixedly connected to the device housing 1.

[0039] Preferably, an outer sealing pad 409 is provided on the outside of the two layered composite dressing plates 4. The outer sealing pad 409 is sealed to the two layered composite dressing plates 4. A silicone pad 411 is provided between the two layered composite dressing plates 4. The silicone pad 411 seals the space between the two layered composite dressing plates 4. The edge of the silicone pad 411 extends more than 5cm outside the wound surface to make the whole sealed. A hinge shaft 410 is installed between the two layered composite dressing plates 4, and the two layered composite dressing plates 4 are hinged together through the hinge shaft 410. The use of two foldable layered composite dressing plates 4 can meet the wound treatment work in various positions. The structure is simple, the functions are complete, and the adaptability is good.

[0040] Preferably, each of the two layered composite dressing plates 4 has a wound contact layer 401 at its front end. The edge of the wound contact layer 401 has an integrally formed irrigation fluid outlet hole 412. The wound contact layer 401 is made of porous silicone or hydrophilic polyurethane membrane. The membrane has irrigation fluid outlet holes 412 with a diameter of 0.1 to 0.3 mm, which are evenly distributed at the edge of the wound contact layer 401. Oxygen diffusion holes are densely distributed in the central area to ensure that the irrigation fluid evenly wets the wound and oxygen diffuses efficiently to the tissue. The interior of the layered composite dressing plate 4 is provided with an air guide hood 414 and a diversion inlet pipe 413. The diversion inlet pipe 413 is connected to the wound contact layer 401 and a one-way valve 408, respectively. The rear end of the air guide hood 414 is equipped with a spring sleeve 415, which is connected to the three-way valve 402 of the air guide hood 414. The wound contact layer 401 and the outer sealing pad layer 409 are designed for single use and have a high airtightness design at the interface.

[0041] An oxygen concentration sensor is embedded on the inner side of the inner film of the layered composite dressing plate 4 to provide real-time feedback on the local oxygen concentration of the wound and automatically adjust the oxygen flow rate.

[0042] Preferably, an electric motor 403 is installed at the rear end of the three-way valve 402, and a drive shaft 404 is connected to the front end of the electric motor 403. Two valve plates 405 are installed on the outside of the drive shaft 404. An air extraction port 406 and an oxygen delivery port are provided inside the three-way valve 402. The two valve plates 405 are respectively sealed to the air extraction port 406 and the oxygen delivery port. A connecting seat 407 is installed at the rear end of both the one-way valve 408 and the three-way valve 402. Both the one-way valve 408 and the three-way valve 402 are fixedly connected to the two layered composite dressing plates 4 through the connecting seat 407.

[0043] Specifically, the layered composite dressing plate 4 can contact the wound through the wound contact layer 401 and the outer sealing pad layer 409 to contact the skin surface, sealing the wound location. Irrigation and oxygen therapy need to be matched with the negative pressure suction sequence. The wound contact layer 401 is made of porous silicone or hydrophilic polyurethane membrane, with irrigation fluid outlet holes 412 with a diameter of 0.1 to 0.3 mm distributed on the membrane. These holes are evenly distributed at the edge of the wound contact layer 401, while the oxygen diffusion holes are densely distributed in the central area to ensure that the irrigation fluid evenly infiltrates the wound and oxygen diffuses efficiently to the tissue. The use of two foldable layered composite dressing plates 4 can meet the needs of wound treatment in various locations. The structure is simple, the functions are complete, and the adaptability is good.

[0044] Working principle: During use, the layered composite dressing plate 4 contacts the wound through the wound contact layer 401 and the outer sealing pad layer 409 contacts the skin surface to seal the wound. Irrigation and oxygen therapy must be matched with the negative pressure suction sequence. The use of two foldable layered composite dressing plates 4 can meet the needs of wound treatment in various locations. The edge of the silicone pad 411 extends more than 5cm beyond the wound surface to ensure a complete wound seal. The control module 106 controls the peristaltic pump 109, oxygen pump 201, and negative pressure pump 110 respectively, and uses a three-way valve 402 and a one-way valve 408 for diversified treatment. The integrated two layered composite dressing plates 4 can perform precise wound treatment. It features four modes: continuous drainage, intermittent drainage, dynamic drainage, and irrigation therapy, adaptable to different wound depths and exudation levels. The negative pressure, irrigation, and oxygen therapy tubing are independent yet integrated, avoiding liquid and gas mixing and contamination. Irrigation and oxygen therapy must be synchronized with the negative pressure suction sequence. During irrigation, the negative pressure should be reduced or paused. During oxygen therapy, oxygen should not be directly drawn away by the negative pressure. It meets the needs of long-term surgery and mobile treatment. Its compact size makes it suitable for use in various hospital settings. It is used to remove secretions and necrotic tissue from cavities or wounds, improve local microcirculation, promote the reduction of tissue edema, control infection, and promote the healthy growth of granulation tissue. It balances therapeutic efficacy, ease of operation, and clinical safety, and is suitable for the comprehensive treatment of chronic and refractory wounds.

[0045] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0046] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the invention.

Claims

1. A negative pressure wound therapy device integrating perfusion and oxygen therapy, comprising a device housing (1), characterized in that, The device housing (1) is equipped with an oxygen tank (2). A connecting pipe (3) is provided on one side below the device housing (1). The upper end of the connecting pipe (3) is provided with two symmetrically folded layered composite dressing plates (4). A three-way valve (402) and a one-way valve (408) are respectively installed at the rear ends of the two layered composite dressing plates (4). The three-way valve (402) is connected to a negative pressure pipe (303) and a gas guide pipe (202) respectively. An infusion pipe (301) is provided at the rear end of the one-way valve (408). A sensor group is provided inside the device housing (1).

2. The negative pressure wound therapy device integrating perfusion and oxygen therapy according to claim 1, characterized in that, An operation screen (101) is provided at the upper end of the device housing (1), and a control module (106) is installed inside the device housing (1). The control module (106) includes an STM32 microcontroller, which is used to connect to a sensor group. The sensor group includes a negative pressure sensor, a flow sensor, an oxygen concentration sensor, a liquid level sensor, and a temperature sensor. The operation screen (101) is electrically connected to the control module (106).

3. The negative pressure wound therapy device integrating perfusion and oxygen therapy according to claim 1, characterized in that, A support base (102) is fixedly installed on the upper end of the device housing (1). A support rod (103) is rotatably connected to the upper end of the support base (102). A hook (104) is welded to the upper end of the support rod (103). The hook (104) is used to hang the oxygen tank (2).

4. The negative pressure wound therapy device integrating perfusion and oxygen therapy according to claim 3, characterized in that, An oxygen pump (201) is fixedly connected to the upper end of the device housing (1). The oxygen pump (201) is sealed to the valve port of the oxygen tank (2). The outlet of the oxygen pump (201) is sealed to the air guide pipe (202).

5. The negative pressure wound therapy device integrating perfusion and oxygen therapy according to claim 1, characterized in that, An electric valve (304) is installed at the lower end of the connecting pipe (3), and a hose (306) is provided at the upper end of the connecting pipe (3). A manifold (302) is fixedly connected to the upper end of the hose (306). The injection pipe (301) and the negative pressure pipe (303) pass through the manifold (302), the hose (306) and the connecting pipe (3) respectively and are sealed to the electric valve (304). A limit frame (305) is fixedly connected to the lower end of the hose (306), and the limit frame (305) is fixedly connected to the device housing (1).

6. The negative pressure wound therapy device integrating perfusion and oxygen therapy according to claim 5, characterized in that, A connecting arm (105) is fixedly installed on the upper end of the device housing (1). One end of the connecting arm (105) is movably connected to the upper end of the hose (306) through a sleeve. The electric valve (304) is fixed inside the device housing (1) and fixedly connected to the device housing (1).

7. The negative pressure wound therapy device integrating perfusion and oxygen therapy according to claim 5, characterized in that, A protective plate (107) is installed on one side of the inner side of the device housing (1). A filter plate (111) is installed at the lower end of the protective plate (107). The filter plate (111) is connected to an electric valve (304). A treatment fluid tank (108) is provided inside the device housing (1). A peristaltic pump (109) is installed on one side of the treatment fluid tank (108). A negative pressure pump (110) is provided at the rear end of the peristaltic pump (109). The peristaltic pump (109) is connected to the filter plate (111). The negative pressure pump (110) is connected to the air duct (202) through the electric valve (304).

8. The negative pressure wound therapy device integrating perfusion and oxygen therapy according to claim 1, characterized in that, An outer sealing gasket layer (409) is provided on the outside of the two layered composite dressing plates (4). The outer sealing gasket layer (409) is sealed to the two layered composite dressing plates (4). A silicone gasket (411) is provided between the two layered composite dressing plates (4). The silicone gasket (411) seals the space between the two layered composite dressing plates (4). A hinge shaft (410) is installed between the two layered composite dressing plates (4). The two layered composite dressing plates (4) are hinged together by the hinge shaft (410).

9. A negative pressure wound therapy device integrating perfusion and oxygen therapy according to claim 8, characterized in that, Both of the layered composite dressing plates (4) are provided with a wound contact layer (401) at their front ends. An integrally formed irrigation fluid outlet hole (412) is provided at the edge of the wound contact layer (401). An air guide hood (414) and a diversion inlet pipe (413) are respectively provided inside the layered composite dressing plate (4). The diversion inlet pipe (413) is connected to the wound contact layer (401) and a one-way valve (408) respectively. A spring sleeve (415) is installed at the rear end of the air guide hood (414). The spring sleeve (415) is connected to the three-way valve (402) of the air guide hood (414) respectively.

10. A negative pressure wound therapy device integrating perfusion and oxygen therapy according to claim 9, characterized in that, An electric motor (403) is installed at the rear end of the three-way valve (402). A drive shaft (404) is connected to the front end of the electric motor (403). Two valve plates (405) are installed on the outside of the drive shaft (404). An air extraction port (406) and an oxygen delivery port are provided inside the three-way valve (402). The two valve plates (405) are respectively sealed and connected to the air extraction port (406) and the oxygen delivery port. A connecting seat (407) is installed at the rear end of both the one-way valve (408) and the three-way valve (402). Both the one-way valve (408) and the three-way valve (402) are fixedly connected to two layered composite dressing plates (4) through the connecting seat (407).

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