Wound oxygenation negative pressure therapy system

Abstract

The present invention discloses a wound oxygenation negative pressure treatment system, comprising: a peristaltic pump, a waste tank, a vacuum pump, a quantitative oxygen storage tank, an oxygen inlet pipe, an oxygen outlet pipe, an oxygen supply control valve and a main control unit. The oxygen supply control valve has an oxygen storage mode and an oxygen supply mode; in the oxygen storage mode, the oxygen inlet pipe is connected and the oxygen outlet pipe is cut off, so that the oxygen supply source fills the quantitative oxygen storage tank with oxygen; in the oxygen supply mode, the oxygen inlet pipe is cut off and the oxygen outlet pipe is connected, so that the quantitative oxygen storage tank supplies a quantitative amount of oxygen to the wound dressing component; wherein the main control unit is used to control the oxygen supply control valve to switch between the oxygen storage mode and the oxygen supply mode, and to avoid the oxygen inlet pipe and the oxygen outlet pipe being connected at the same time. The wound oxygenation negative pressure treatment system of the present application has a relatively stable single oxygen supply during oxygenation, which is conducive to maintaining the air pressure in the wound dressing component to be relatively stable.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, and in particular to a wound oxygenation negative pressure treatment system. Background Art

[0002] The wound oxygenation negative pressure therapy system is used to form a negative pressure environment at the wound surface and increase the oxygen content at the wound surface. In the traditional technology, an oxygen supply opening is opened on the wound dressing component to continuously supply oxygen to the wound dressing component, but the oxygen supply to the wound dressing component in this way is unstable and the air pressure in the wound dressing component fluctuates greatly. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a wound oxygenation negative pressure treatment system, wherein when the wound oxygenation negative pressure treatment system is oxygenated, the single oxygen delivery amount is relatively stable and the wound pressure can be relatively stable.

[0004] The wound oxygenation negative pressure treatment system implemented according to the present invention comprises: a peristaltic pump, the peristaltic pump having a pump inlet and a pump outlet, the pump inlet being used to connect to a liquid source, and the pump outlet being used to connect to the wound dressing assembly; a waste tank, the waste tank being used to connect to the wound dressing assembly; a vacuum pump, the vacuum pump being connected to the waste tank; a quantitative oxygen storage tank, the quantitative oxygen storage tank being used to store a quantitative amount of oxygen; an oxygen inlet pipe, one end of the oxygen inlet pipe being connected to the quantitative oxygen storage tank and the other end being used to connect to an oxygen supply source; an oxygen outlet pipe, one end of the oxygen outlet pipe being connected to the quantitative oxygen storage tank and the other end being used to connect to the wound dressing assembly; a supply An oxygen control valve, the oxygen supply control valve is connected to the oxygen inlet pipe and the oxygen outlet pipe; a main control unit, the main control unit is communicatively connected to the peristaltic pump, the vacuum pump, and the oxygen supply control valve; wherein the oxygen supply control valve has an oxygen storage mode and an oxygen supply mode; in the oxygen storage mode, the oxygen inlet pipe is connected and the oxygen outlet pipe is cut off, so that the oxygen supply source fills the quantitative oxygen storage tank with oxygen; in the oxygen supply mode, the oxygen inlet pipe is cut off and the oxygen outlet pipe is connected, so that the quantitative oxygen storage tank supplies a quantitative amount of oxygen to the wound dressing assembly; wherein the main control unit is also used to prevent the oxygen inlet pipe and the oxygen outlet pipe from being connected at the same time.

[0005] According to the wound oxygenation negative pressure treatment system of the embodiment of the present invention, by setting a peristaltic pump, a waste liquid tank, and a vacuum pump, the wound can be filled with liquid for cleaning, and the peristaltic pump can accurately control the amount of liquid filled, and the vacuum pump can achieve a stable negative pressure in the waste liquid tank and inhale the lavage liquid. The conversion of the oxygen storage mode and the oxygen supply mode is controlled by the oxygen supply control valve, and part of the oxygen in the oxygen supply source is pre-stored in the quantitative oxygen storage tank, and then the oxygen in the quantitative oxygen storage tank is transported to the wound dressing assembly. The quantitative oxygen storage tank can isolate the oxygen supply source from the wound dressing assembly, avoid direct connection between the oxygen supply source and the wound dressing assembly, and thus reduce the influence of the oxygen supply source on the air pressure in the wound dressing assembly. In addition, the oxygen in the quantitative oxygen storage tank has little effect on the air pressure in the wound dressing assembly, the single oxygen supply amount is relatively stable, and the air pressure in the wound dressing assembly can be relatively stable, so that the pressure of the dressing on the wound is relatively stable.

[0006] In some embodiments, the volume of the quantitative oxygen storage tank is 3-50 ml.

[0007] In some embodiments, the oxygen in the quantitative oxygen storage tank is compressed oxygen.

[0008] In some embodiments, the oxygen supply control valve is a three-way valve, and the three valve ports of the three-way valve are respectively connected to the quantitative oxygen storage tank, the oxygen inlet pipe and the oxygen outlet pipe; or, the oxygen supply control valve includes a first sub-valve and a second sub-valve, wherein the first sub-valve is connected to the quantitative oxygen storage tank and the oxygen inlet pipe, and the second sub-valve is connected to the quantitative oxygen storage tank and the oxygen outlet pipe.

[0009] In some specific embodiments, the wound oxygenation negative pressure therapy system further includes an oxygen pressure sensor for detecting the air pressure of the oxygen supply source, and the oxygen pressure sensor is electrically connected to the main control unit.

[0010] Furthermore, the main control unit also includes a first calculation module, which calculates the switching frequency of the oxygen supply control valve by obtaining the pressure value detected by the oxygen pressure sensor, and the oxygen supply control valve operates according to the calculation result of the first calculation module.

[0011] In some specific embodiments, the wound oxygenation negative pressure therapy system also includes a wound pressure sensor for detecting the pressure in the waste tank and / or the wound dressing assembly, and the wound pressure sensor is communicatively connected to the main control unit.

[0012] Furthermore, the main control unit also includes a second calculation module, which calculates the rotation speed of the vacuum pump by obtaining the pressure value detected by the wound pressure sensor when the wound oxygenation negative pressure therapy system is initially operated, and the vacuum pump operates according to the calculation result of the second calculation module.

[0013] In some specific embodiments, the wound oxygenation and negative pressure therapy system also includes: an electric valve, one end of the electric valve is connected to the waste tank and the other end is used to connect to the wound dressing assembly, the electric valve has a switchable first state and a second state, when the electric valve is in the first state, the waste tank and the wound dressing assembly are connected, and when the electric valve is in the second state, the waste tank and the wound dressing assembly are disconnected; the main control unit is communicatively connected to the electric valve, and the main control unit is used to control the wound oxygenation and negative pressure therapy system to cycle in the first stage, the second stage, the second stage, and the fourth stage in sequence; in the first stage, the electric valve is in the first state, and the vacuum pump is in the start-up state; in the second stage, the electric valve is in the second state, and the vacuum pump stops working; in the third stage, the peristaltic pump is in the start-up state; in the fourth stage, the peristaltic pump stops running.

[0014] 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

[0015] 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:

[0016] Figure 1 It is a structural schematic diagram of a wound oxygenation negative pressure treatment system according to a first embodiment of the present invention;

[0017] Figure 2 yes Figure 1 The schematic diagram of the wound oxygenation negative pressure therapy system working in conjunction with the wound dressing assembly is shown;

[0018] Figure 3 This is a schematic diagram of the oxygen supply control valve according to the second embodiment of the present invention working in conjunction with the wound dressing assembly.

[0019] Reference numerals:

[0020] Wound oxygenation negative pressure therapy system 100,

[0021] Wound surface 10, wound dressing assembly 11, peristaltic pump 12, perfusion tube 13, drainage tube 14, waste tank 15, vacuum pump 16, quantitative oxygen storage tank 17, oxygen inlet tube 18, oxygen outlet tube 19,

[0022] Oxygen supply control valve 20, first sub-valve 201, second sub-valve 202,

[0023] Main control unit 21, oxygen pressure sensor 22, wound surface pressure sensor 23, liquid source 24,

[0024] Electric valve 25. DETAILED DESCRIPTION

[0025] Embodiments of the present invention are described in detail below, examples of which 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.

[0026] In the description of the present invention, it should be understood that the terms "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] The following figures describe a wound oxygenation negative pressure therapy system 100 according to an embodiment of the present invention.

[0029] like Figure 1 As shown, the wound oxygenation negative pressure treatment system 100 according to an embodiment of the present invention includes: a peristaltic pump 12, a waste tank 15, a vacuum pump 16, a quantitative oxygen storage tank 17, an oxygen inlet pipe 18, an oxygen outlet pipe 19, an oxygen supply control valve 20 and a main control unit 21. It is understandable that the wound oxygenation negative pressure treatment system 100 should be used in conjunction with the wound dressing component 11. Some manufacturers do not carry the wound dressing component 11 when producing and selling the wound oxygenation negative pressure treatment system 100, and some manufacturers carry the wound dressing component 11 when producing and selling the wound oxygenation negative pressure treatment system 100, and this application scheme does not limit this. Figure 1 The wound oxygenation negative pressure treatment system 100 is shown without the wound dressing assembly 11. When the wound oxygenation negative pressure treatment system 100 is used, the wound dressing assembly 11 should be configured separately. Figure 2 shown.

[0030] The wound dressing assembly 11 is used to cover the wound surface 10 and form a working cavity between the wound surface 10 and the wound surface 10 . The working cavity is used to be filled with a dressing. The dressing is filled in the working cavity and contacts the wound surface 10 .

[0031] The peristaltic pump 12 has a pump inlet and a pump outlet. The pump inlet is used to connect to the liquid source 24, and the pump outlet is used to connect to the wound dressing assembly 11 through the perfusion tube 13. When the peristaltic pump 12 is running, it drives the perfusion liquid to be injected into the working chamber through the perfusion tube 13.

[0032] The waste tank 15 is used to connect the wound dressing assembly 11 through the drainage tube 14, so that a connecting space is formed between the working chamber and the waste tank 15. The waste liquid in the wound dressing assembly 11 can flow into the waste tank 15 through the drainage tube 14, and the waste liquid is collected by the waste tank 15.

[0033] The vacuum pump 16 is connected to the waste tank 15 so as to suck the fluid in the working chamber through the drainage tube 14 when negative pressure is formed in the waste tank 15. Thus, the vacuum pump 16 forms a negative pressure in the waste tank 15, that is, the air pressure in the waste tank 15 is lower than the air pressure in the working chamber, and the fluid in the working chamber is sucked into the waste tank 15 through the drainage tube 14 under the action of the air pressure difference until the air pressure difference disappears, thereby reducing the residual fluid in the working chamber and preventing the fluid in the drainage tube 14 from flowing back to the working chamber.

[0034] The quantitative oxygen storage tank 17 is used to store quantitative oxygen. Therefore, the capacity of the quantitative oxygen storage tank 17 is usually small, and the single oxygen supply is small. The oxygen demand of the wound surface is met through multiple supplies to avoid excessive or insufficient oxygen.

[0035] One end of the oxygen inlet pipe 18 is connected to the quantitative oxygen storage tank 17 and the other end is used to connect to the oxygen supply source. The oxygen supply source fills oxygen into the quantitative oxygen storage tank 17 through the oxygen inlet pipe 18.

[0036] One end of the oxygen outlet pipe 19 is connected to the quantitative oxygen storage tank 17 and the other end is used to connect to the wound dressing assembly 11. The oxygen in the quantitative oxygen storage tank 17 is output through the oxygen outlet pipe 19 and injected into the wound dressing assembly 11.

[0037] The oxygen supply control valve 20 is connected to the oxygen inlet pipe 18 and the oxygen outlet pipe 19 , so as to control the charging and output of oxygen in the quantitative oxygen storage tank 17 .

[0038] The main control unit 21 is in communication connection with the peristaltic pump 12 , the vacuum pump 16 , and the oxygen supply control valve 20 , so as to control the operation of the vacuum pump 16 and the oxygen supply control valve 20 .

[0039] It can be understood that the capacity of the quantitative oxygen storage tank 17 is usually smaller than the volume of the waste tank 15 and the working chamber. When the oxygen in the quantitative oxygen storage tank 17 enters the working chamber through the oxygen outlet pipe 19, the volume of oxygen is smaller than the volume of the waste tank 15 and the working chamber. Therefore, the injection of oxygen into the working chamber has a smaller impact on the air pressure in the working chamber and the waste tank 15, and the air pressure in the working chamber and the waste tank 15 will not fluctuate too much.

[0040] Among them, the oxygen supply control valve 20 has an oxygen storage mode and an oxygen supply mode:

[0041] In the oxygen storage mode, the oxygen inlet pipe 18 is turned on and the oxygen outlet pipe 19 is turned off, so that the oxygen supply source fills the quantitative oxygen storage tank 17 with oxygen. In the oxygen supply mode, the oxygen inlet pipe 18 is turned off and the oxygen outlet pipe 19 is turned on, so that the quantitative oxygen storage tank 17 supplies oxygen to the working chamber. The main control unit 21 is used to control the oxygen supply control valve 20 to switch between the oxygen storage mode and the oxygen supply mode, and to prevent the oxygen inlet pipe 18 and the oxygen outlet pipe 19 from being turned on at the same time.

[0042] It is understandable that when the oxygen supply control valve 20 is in the oxygen storage mode, the quantitative oxygen storage tank 17 is not connected to the working chamber, and thus the oxygen supply source is not connected to the working chamber, and the oxygen from the oxygen supply source only enters the quantitative oxygen storage tank 17, so that the oxygen supply source has no effect on the air pressure in the working chamber. When the oxygen supply control valve 20 is in the oxygen supply mode, the oxygen inlet pipe 18 is cut off to isolate the quantitative oxygen storage tank 17 from the oxygen supply source, so that when the oxygen outlet pipe 19 connects the quantitative oxygen storage tank 17 with the working chamber, the oxygen in the quantitative oxygen storage tank 17 flows into the working chamber, and the oxygen in the oxygen supply source does not flow into the working chamber.

[0043] It should be noted that the present application does not exclude that in some solutions, the oxygen supply control valve 20 can also have a double-off mode, in which the oxygen inlet pipe 18 and the oxygen outlet pipe 19 are both disconnected, so that it is not necessary to inject oxygen from the fixed-quantity oxygen storage tank 17, and the fixed-quantity oxygen storage tank 17 is disconnected from the wound dressing assembly 11. For example, when it is necessary to enter the wound dressing assembly 11 for irrigation, the oxygen supply control valve 20 can be adjusted to the double-off mode.

[0044] The wound oxygenation negative pressure treatment system 100 of the present application controls the conversion between the oxygen storage mode and the oxygen supply mode through the oxygen supply control valve 20, pre-stores part of the oxygen in the oxygen supply source in the quantitative oxygen storage tank 17, and then delivers the oxygen in the quantitative oxygen storage tank 17 to the wound dressing assembly 11. The quantitative oxygen storage tank 17 can isolate the oxygen supply source from the wound dressing assembly 11, avoid direct connection between the oxygen supply source and the wound dressing assembly 11, and thus reduce the influence of the oxygen supply source on the air pressure in the working chamber. The quantitative oxygen storage tank 17 supplies a quantitative amount of oxygen to the wound dressing assembly 11, and the single oxygen supply is stable. The oxygen supply to the wound dressing assembly 11 can be determined by controlling the number of oxygen supplies of the quantitative oxygen storage tank 17, and the oxygen supply speed can be adjusted by the operating frequency of the oxygen supply control valve 20. This control method for the supply of oxygen is not only simple in structure, but also stable and easy to control.

[0045] In addition, by setting the capacity of the quantitative oxygen storage tank 17 to be smaller than the volume of the waste tank 15 and the working chamber, the oxygen in the quantitative oxygen storage tank 17 can have a smaller effect on the air pressure in the working chamber. Therefore, when the working chamber is filled with oxygen, the single oxygen supply is relatively stable, and the air pressure in the working chamber can be relatively stable, so that the pressure of the dressing on the wound surface 10 is relatively stable.

[0046] Preferably, the volume of the quantitative oxygen storage tank 17 is 3-50 ml. Therefore, the volume of the quantitative oxygen storage tank 17 is relatively small, and when the oxygen supply control valve 20 is in the oxygen supply mode, the oxygen in the quantitative oxygen storage tank 17 entering the working chamber has little effect on the air pressure in the working chamber, provided that the oxygen injected into the working chamber at a single time is sufficient.

[0047] In addition, the quantitative oxygen storage tank 17 is relatively small in size, and is convenient to be installed in the wound oxygenation negative pressure therapy system 100.

[0048] In some embodiments, the oxygen in the quantitative oxygen storage tank 17 is compressed oxygen. Therefore, more oxygen can be stored in the quantitative oxygen storage tank 17. At the same time, when the oxygen supply control valve 20 is in the oxygen supply mode, the oxygen pressure in the quantitative oxygen storage tank 17 is greater than the pressure in the working chamber. The oxygen in the quantitative oxygen storage tank 17 can flow into the working chamber under the action of the pressure difference, and the gas in the working chamber can be prevented from flowing into the quantitative oxygen storage tank 17.

[0049] In some embodiments, Figure 1 As shown, the oxygen supply control valve 20 is a three-way valve, and the three valve ports of the three-way valve are respectively connected to the quantitative oxygen storage tank 17, the oxygen inlet pipe 18 and the oxygen outlet pipe 19. In such a structure, the quantitative oxygen storage tank 17 can be connected to the oxygen supply source and the wound dressing assembly 11 by adjusting the opening and closing of two different valve ports.

[0050] Or, if Figure 3 As shown, the oxygen supply control valve 20 includes two sub-valves, namely, a first sub-valve 201 and a second sub-valve 202. The first sub-valve 201 is connected to the quantitative oxygen storage tank 17 and the oxygen inlet pipe 18, and the second sub-valve 202 is connected to the quantitative oxygen storage tank 17 and the oxygen outlet pipe 19. Under such a structure, the quantitative oxygen storage tank 17 can be connected to the oxygen supply source and the wound dressing assembly 11 by adjusting the opening and closing of the two sub-valves.

[0051] In some specific embodiments, Figure 1 As shown, the wound oxygenation negative pressure therapy system 100 also includes an oxygen pressure sensor 22 for detecting the air pressure of the oxygen supply source, and the oxygen pressure sensor 22 is electrically connected to the main control unit 21.

[0052] It can be understood that when the oxygen supply control valve 20 is in the oxygen storage mode, the oxygen supply source is connected to the quantitative oxygen storage tank 17. When the quantitative oxygen storage tank 17 is full of oxygen, the oxygen supply source and the air pressure in the quantitative oxygen storage tank 17 are the same.

[0053] Therefore, the oxygen pressure sensor 22 can be used to detect the oxygen supply source and the air pressure value in the quantitative oxygen storage tank 17 filled with oxygen. The air pressure value information in the quantitative oxygen storage tank 17 detected by the oxygen pressure sensor 22 is transmitted to the main control unit 21, so that the main control unit 21 can adjust the opening and closing state of the oxygen supply control valve 20 according to the air pressure value in the quantitative oxygen storage tank 17.

[0054] Furthermore, the main control unit 21 also includes a first calculation module, which calculates the switching frequency of the oxygen supply control valve 20 by obtaining the pressure value detected by the oxygen pressure sensor 22, and the oxygen supply control valve 20 operates according to the calculation result of the first calculation module. Thus, the main control unit 21 can accurately control the working mode of the oxygen supply control valve 20, and at the same time, the main control unit 21 controls the operation of the vacuum pump 16 to adjust the air pressure in the working chamber.

[0055] For example, when the air pressure in the working chamber needs to be reduced, the main control unit 21 can control the speed of the vacuum pump 16 to reduce so as to reduce the negative pressure in the working chamber. At the same time, by increasing the switching frequency of the oxygen storage mode and the oxygen supply mode of the oxygen supply control valve 20, the oxygen injected into the working chamber can be increased, thereby reducing the air pressure in the working chamber. For another example, when the air pressure in the working chamber needs to be stabilized, the main control unit 21 controls the switching frequency of the oxygen storage mode and the oxygen supply mode of the oxygen supply control valve 20 and the speed of the vacuum pump 16 through the calculation of the first calculation module to achieve the stabilization of the air pressure in the working chamber.

[0056] In some specific embodiments, the wound oxygenation negative pressure therapy system 100 also includes a wound pressure sensor 23 for detecting the pressure in the waste tank 15 or the working chamber, or for simultaneously detecting the pressure in the waste tank 15 and the working chamber. The wound pressure sensor 23 is communicatively connected to the main control unit 21.

[0057] It is understandable that the wound dressing assembly 11 is likely to leave gaps at the wound surface 10, which may cause a certain amount of air leakage in the working cavity, resulting in changes in the air pressure in the working cavity.

[0058] Therefore, the wound pressure sensor 23 can detect the changes in the air pressure in the waste tank 15 or the working chamber, so that the main control unit 21 can obtain the air pressure value in the waste tank 15 or the working chamber and monitor and analyze it to adjust the operating status of the vacuum pump 16 and the oxygen supply control valve 20 so that the air pressure in the working chamber is in a set state.

[0059] It should be noted that the location of the wound pressure sensor 23 is not limited. Since the vacuum pump 16, the waste tank 15 and the wound dressing assembly 11 are connected to each other, the wound pressure sensor 23 can be set at any location between the above three components to detect the air pressure in the waste tank 15 and the working chamber. For example, the wound pressure sensor 23 can be set in the waste tank 15, or for another example, the wound pressure sensor 23 can be set on the drainage tube 14 between the waste tank 15 and the wound dressing assembly 11.

[0060] Furthermore, the main control unit 21 also includes a second calculation module, which calculates the rotation speed of the vacuum pump 16 by obtaining the pressure value detected by the wound pressure sensor 23 when the wound oxygenation negative pressure therapy system is initially operated, and the vacuum pump 16 operates according to the calculation result of the second calculation module. Therefore, through the processing of the air pressure value data by the second calculation module, the main control unit 21 can accurately control the vacuum pump 16 and the oxygen supply control valve 20.

[0061] For example, when the wound oxygenation negative pressure therapy system 100 is used, the operator adjusts the parameters of the peristaltic pump 12 and / or the vacuum pump 16. The operator can adjust the pressure value in the wound dressing assembly 11 to a suitable pressure value according to the condition of the wound 10 or the condition of the wound dressing assembly 11. The second calculation module can obtain the pressure value, and then control the operation of the vacuum pump 16 with this pressure value, so that when there is no supervision and adjustment by the operator, the wound oxygenation negative pressure therapy system 100 can automatically adjust the wound dressing assembly 11 to the pressure value, thereby improving its automatic control.

[0062] For example, when the above-mentioned air pressure value is too low, the main control unit 21 can control the speed of the vacuum pump 16 to be reduced, or control the oxygen supply control valve 20 to be switched to the oxygen supply mode, and inject oxygen into the working chamber to increase the air pressure in the working chamber. For another example, when the above-mentioned air pressure value is too high, the main control unit 21 can control the speed of the vacuum pump 16 to be increased, or control the oxygen supply control valve 20 to be switched to the oxygen storage mode, and stop injecting oxygen into the working chamber to avoid the increase of the air pressure in the working chamber.

[0063] In some specific embodiments, Figure 1 and Figure 2 As shown, the wound oxygenation negative pressure treatment system 100 also includes: an electric valve 25. One end of the electric valve 25 is connected to the waste tank 15, and the other end is used to connect to the wound dressing assembly 11, such as Figure 2 In the figure, the electric valve 25 is arranged on the drainage tube 14, and the electric valve 25 has a switchable first state and a second state. When the electric valve 25 is in the first state, the drainage tube 14 connects the waste tank 15 and the working chamber. At this time, the waste liquid in the working chamber can flow to the waste tank 15 through the drainage tube 14, and the electric valve 25 is in the second state. The drainage tube 14 is cut off, that is, the working chamber and the waste tank 15 are not connected to each other, and the working chamber and the waste tank 15 are separated into two independent spaces.

[0064] At the same time, the main control unit 21 is connected to the electric valve 25 for communication, and the main control unit 21 is used to control the wound oxygenation negative pressure therapy system 100 to cycle through the first stage, the second stage, the second stage, and the fourth stage in sequence.

[0065] In the first stage, the electric valve 25 is in the first state, and the vacuum pump 16 is in the start state, so that negative pressure is generated in the drainage tube 14 and the working chamber and lasts for a first time. At this time, the liquid at the wound surface 10 can be absorbed by the dressing, and a certain negative pressure value can be reached in the working chamber. The dressing is compressed under the action of the negative pressure, and the liquid absorbed by the dressing is sucked into the drainage tube 14 under the action of the negative pressure, so that less liquid remains at the wound surface 10.

[0066] In the second stage, the electric valve 25 is in the second state to cut off the drainage tube 14 and stop the vacuum pump 16 to maintain a negative pressure environment in the working chamber. At this time, the dressing remains in a compressed state.

[0067] In the third stage, the peristaltic pump 12 is in the start-up state to deliver a fixed amount of perfusion liquid to the working chamber, and as the perfusion liquid enters, the dressing expands and the perfusion liquid evenly fills the dressing.

[0068] It can be understood that as the perfusion liquid gradually enters the working chamber, the negative pressure in the working chamber gradually decreases, the dressing can gradually expand, and the attraction generated by the expansion of the dressing makes the perfusion liquid evenly fill the entire dressing. During the expansion of the dressing, the water absorption of the dressing can be maintained in a relatively saturated state, so that the perfusion liquid can evenly contact the wound surface 10 through the dressing.

[0069] In the fourth stage, the peristaltic pump 12 stops running, so that the perfusion liquid soaks in the dressing for a second time. During the second time, the perfusion liquid can fully contact and evenly moisten the wound surface 10 through the dressing.

[0070] Thus, the negative pressure therapy system is controlled by the main control unit 21 to cycle through the first stage, the second stage, the second stage and the fourth stage, so that the dressing can switch between the compressed and expanded states. In the process of compression of the dressing, the water absorption capacity of the dressing gradually weakens, which is conducive to the liquid in the dressing to be discharged from the dressing and flow to the waste tank 15 through the drainage tube 14. At this time, the liquid at the wound surface 10 can be more thoroughly attracted to the waste tank 15, and less liquid remains at the wound surface 10. In the process of expansion of the dressing, the water absorption capacity of the dressing gradually increases, and the perfusion liquid flowing into the working chamber through the perfusion tube 13 can evenly fill the dressing under the attraction generated by the expansion of the dressing. At this time, the perfusion liquid can evenly moisten the wound surface 10 through the dressing.

[0071] In some optional embodiments, in the first stage, the air pressure in the working chamber reaches -125 mmHg; in the third stage, the air pressure in the working chamber reaches -60 mmHg; and in the fourth stage, when the second time is reached, the air pressure in the working chamber reaches -30 mmHg.

[0072] Thus, in the first stage, the dressing is compressed under the air pressure of -125 mmHg in the working chamber. After the perfusion liquid is injected in the third stage, the air pressure in the working chamber rises to -60 mmHg, at which time the dressing gradually expands and the compression amount of the dressing decreases. In the fourth stage, the dressing absorbs the liquid exuded from the wound surface 10 and expands slowly, and finally the air pressure in the working chamber reaches -30 mmHg when the second time is reached. At this time, the dressing is still in a compressed state under the action of the -30 mmHg air pressure, and the liquid in the dressing is distributed more evenly. In addition, during the above-mentioned whole process, the dressing is always in the process of expansion, the water absorption capacity of the dressing is gradually enhanced, and the liquid absorbed by the dressing is not easy to be discharged again.

[0073] Other structures and operations of the wound oxygenation negative pressure therapy system 100 according to the embodiment of the present invention are known to ordinary technicians in the field and will not be described in detail here.

[0074] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" 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.

[0075] 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 wound oxygenation negative pressure treatment system, characterized in that: include: A peristaltic pump (12), the peristaltic pump (12) having a pump inlet and a pump outlet, the pump inlet being used to connect to a liquid source (24), and the pump outlet being used to connect to a wound dressing assembly (11); a waste material tank (15), the waste material tank (15) being used to be connected to the wound dressing assembly (11), the wound dressing assembly (11) and the wound surface (10) forming a working cavity; a vacuum pump (16), the vacuum pump (16) being in communication with the waste tank (15); A quantitative oxygen storage tank (17), wherein the quantitative oxygen storage tank (17) is used to store a quantitative amount of oxygen; An oxygen inlet pipe (18), one end of the oxygen inlet pipe (18) is connected to the quantitative oxygen storage tank (17) and the other end is used to connect to an oxygen supply source; An oxygen outlet pipe (19), one end of the oxygen outlet pipe (19) being connected to the quantitative oxygen storage tank (17) and the other end of the oxygen outlet pipe (19) being used to be connected to the wound dressing assembly (11); an oxygen supply control valve (20), the oxygen supply control valve (20) being connected to the oxygen inlet pipe (18) and the oxygen outlet pipe (19); A main control unit (21), the main control unit (21) being communicatively connected to the peristaltic pump (12), the vacuum pump (16), and the oxygen supply control valve (20); Wherein, the oxygen supply control valve (20) has an oxygen storage mode and an oxygen supply mode; In the oxygen storage mode, the oxygen inlet pipe (18) is open and the oxygen outlet pipe (19) is closed, so that the oxygen supply source fills the quantitative oxygen storage tank (17) with oxygen; In the oxygen supply mode, the oxygen inlet pipe (18) is cut off and the oxygen outlet pipe (19) is connected, so that the quantitative oxygen storage tank (17) supplies a quantitative amount of oxygen to the wound dressing assembly (11); Wherein, the main control unit (21) is also used to prevent the oxygen inlet pipe (18) and the oxygen outlet pipe (19) from being turned on at the same time; The volume of the quantitative oxygen storage tank (17) is smaller than the volume of the waste tank (15) and the volume of the working chamber.

2. The wound oxygenation negative pressure treatment system according to claim 1, characterized in that: The volume of the quantitative oxygen storage tank (17) is 3-50 ml.

3. The wound oxygenation negative pressure treatment system according to claim 1, characterized in that: The oxygen in the quantitative oxygen storage tank (17) is compressed oxygen.

4. The wound oxygenation negative pressure treatment system according to claim 1, characterized in that: The oxygen supply control valve (20) is a three-way valve, and the three valve ports of the three-way valve are respectively connected to the quantitative oxygen storage tank (17), the oxygen inlet pipe (18) and the oxygen outlet pipe (19); Alternatively, the oxygen supply control valve (20) comprises a first sub-valve (201) and a second sub-valve (202), wherein the first sub-valve (201) is connected to the quantitative oxygen storage tank (17) and the oxygen inlet pipe (18), and the second sub-valve (202) is connected to the quantitative oxygen storage tank (17) and the oxygen outlet pipe (19).

5. The wound oxygenation negative pressure treatment system according to any one of claims 1 to 4, characterized in that: It also includes an oxygen pressure sensor (22) for detecting the air pressure of the oxygen supply source, and the oxygen pressure sensor (22) is electrically connected to the main control unit (21).

6. The wound oxygenation negative pressure treatment system according to claim 5, characterized in that: The main control unit (21) further comprises a first calculation module, wherein the first calculation module calculates the switching frequency of the oxygen supply control valve (20) by obtaining the pressure value detected by the oxygen pressure sensor (22), and the oxygen supply control valve (20) operates according to the calculation result of the first calculation module.

7. The wound oxygenation negative pressure treatment system according to any one of claims 1 to 4, characterized in that: It also includes a wound pressure sensor (23) for detecting the pressure in the waste tank (15) and / or the wound dressing assembly (11), and the wound pressure sensor (23) is communicatively connected to the main control unit (21).

8. The wound oxygenation negative pressure treatment system according to claim 7, characterized in that: The main control unit (21) further comprises a second calculation module, which calculates the rotation speed of the vacuum pump (16) by obtaining the pressure value detected by the wound pressure sensor (23) when the wound oxygenation negative pressure therapy system is initially operated, and the vacuum pump (16) operates according to the calculation result of the second calculation module.

9. The wound oxygenation negative pressure treatment system according to any one of claims 1 to 4, characterized in that: Also includes: an electric valve (25), one end of the electric valve (25) being connected to the waste tank (15), and the other end being used to connect to the wound dressing assembly (11), the electric valve (25) having a switchable first state and a second state, the electric valve (25) being used to connect the waste tank (15) and the wound dressing assembly (11) in the first state, and disconnecting the waste tank (15) and the wound dressing assembly (11) in the second state; the main control unit (21) being communicatively connected to the electric valve (25), the main control unit (21) being used to control the wound oxygenation negative pressure therapy system (100) to cycle through the first stage, the second stage, the third stage, and the fourth stage in sequence; In the first stage, the electric valve (25) is in a first state, and the vacuum pump (16) is in a start-up state; In the second stage, the electric valve (25) is in a second state, and the vacuum pump (16) stops working; In the third stage, the peristaltic pump (12) is in a startup state; In the fourth stage, the peristaltic pump (12) stops running.

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