A negative pressure measurement control method and a negative pressure wound therapy apparatus

Abstract

The present application relates to the technical field of pressure measurement, and discloses a negative pressure measurement control method and a negative pressure wound therapy device, which comprises the following steps: starting a negative pressure source with an initial preset value, keeping the negative pressure at the negative pressure source stable at the preset value; detecting multiple negative pressure detection values in a negative pressure action area; obtaining vertical negative pressure loss values between multiple negative pressure detection positions in a direction perpendicular to a negative pressure action surface; arranging a negative pressure compensation point array according to the negative pressure detection positions; and selectively adjusting the negative pressure value at the negative pressure source and / or selectively starting the negative pressure compensation points so that the multiple vertical negative pressure loss values in the negative pressure action area from the direction close to the negative pressure action surface reach the loss threshold value in turn. Through the above technical solution, the problem of uneven negative pressure action in the negative pressure action area caused by the lack of measurement and control in the negative pressure fluid suction application in the prior art is solved.

Description

Technical Field

[0001] This invention relates to the field of pressure measurement technology, specifically to a negative pressure measurement and control method and a negative pressure wound therapy device. Background Technology

[0002] Pressure has a wide range of applications, including both positive and negative pressure. Both positive and negative pressure are involved in numerous application scenarios, and the measurement and control of pressure have a crucial impact on these scenarios. In negative pressure applications, fluids are drawn in by the suction effect of negative pressure. The measurement and control logic in existing technologies is to control the negative pressure at the negative pressure source to achieve negative pressure control at the negative pressure application location. However, it lacks control and measurement within the negative pressure application area. In applications where negative pressure is used to draw fluids and there is a fluid absorption unit, the negative pressure step-like pattern within the negative pressure application area will lose the predetermined negative pressure environment, affecting the negative pressure absorption effect. Based on the above problems, a new solution is needed to address these issues. Summary of the Invention

[0003] This invention proposes a negative pressure measurement and control method and a negative pressure wound treatment device, which solves the problem of uneven negative pressure application in the negative pressure application area due to the lack of measurement and control within the negative pressure application area in the existing negative pressure suction fluid application.

[0004] The technical solution of the present invention is as follows:

[0005] A negative pressure measurement and control method, the control method comprising the following steps:

[0006] Turn on the negative pressure source with the initial preset value and keep the negative pressure at the negative pressure source stable at the preset value;

[0007] Detect multiple negative pressure values ​​within the negative pressure area;

[0008] Obtain the vertical negative pressure loss value between multiple negative pressure detection positions along the direction perpendicular to the negative pressure action surface;

[0009] Arrange a negative pressure compensation point array according to the negative pressure detection location;

[0010] The negative pressure value at the negative pressure source is selectively adjusted based on the vertical negative pressure loss value.

[0011] And / or

[0012] Selectively adjust the negative pressure compensation point

[0013] This ensures that multiple vertical negative pressure loss values ​​within the negative pressure area, from the direction closest to the negative pressure surface, sequentially reach the loss threshold.

[0014] Based on the above scheme, the step "multiple vertical negative pressure loss values ​​in the negative pressure area sequentially reach the loss threshold from the direction closest to the negative pressure surface" specifically means:

[0015] Within the negative pressure area, the vertical negative pressure loss value from the direction away from the negative pressure surface is periodically maintained from the attenuation value to the working value until the attenuation value reaches the loss threshold, at which point the area that has reached the loss threshold is in a maintained state.

[0016] Based on the above scheme, the step "obtaining the vertical negative pressure loss value between multiple negative pressure detection positions in the direction perpendicular to the negative pressure action surface" also includes the following steps:

[0017] Obtain the sub-vertical negative pressure loss value between multiple negative pressure detection positions in a plane parallel to the negative pressure action surface;

[0018] Step "Selectively adjust the negative pressure value at the negative pressure source based on the vertical negative pressure loss value"

[0019] And / or

[0020] Selectively adjust the negative pressure compensation point

[0021] To ensure that multiple vertical negative pressure loss values ​​within the negative pressure application area sequentially reach the loss threshold from the direction closest to the negative pressure application surface, further:

[0022] The negative pressure value at the negative pressure source is selectively adjusted based on the vertical negative pressure loss value.

[0023] And / or

[0024] Selectively turn on or keep the negative pressure compensation point closed;

[0025] This allows multiple vertical negative pressure loss values ​​within the negative pressure area to selectively and sequentially reach the loss threshold from the direction closest to the negative pressure surface.

[0026] Based on the above scheme, the step "selectively adjusts the negative pressure value at the negative pressure source according to the sub-vertical negative pressure loss value" is further refined.

[0027] And / or

[0028] "Selectively activating the negative pressure compensation point" specifically means:

[0029] Determine if the vertical negative pressure loss value is greater than the lower limit of loss but less than the loss threshold. If so, increase the negative pressure value at the negative pressure source.

[0030] And / or

[0031] Selectively turn the negative pressure compensation point on or keep it off.

[0032] Based on the above plan,

[0033] The negative pressure value at the negative pressure source is selectively adjusted based on the vertical negative pressure loss value.

[0034] And / or

[0035] "Selectively opening or keeping the negative pressure compensation point closed" specifically refers to:

[0036] Determine if the vertical negative pressure loss value is not greater than the lower limit of the loss. If so, close the negative pressure compensation point at the corresponding location.

[0037] A negative pressure wound therapy device includes a negative pressure source, a control unit, a drainage dressing, a sealing film, multiple negative pressure detection heads, and multiple negative pressure tubes. The drainage dressing covers the negative pressure application surface, and the sealing film covers the drainage dressing to form a sealed space. One end of each negative pressure tube is connected to the negative pressure source, and the other end of one negative pressure tube serves as a main negative pressure port connected to the sealed space via the sealing film. The other ends of the remaining negative pressure tubes are arranged as a negative pressure compensation point array within the drainage dressing. The negative pressure detection heads correspond to the positions of the negative pressure compensation points. The control unit is communicatively connected to the negative pressure source and is used to execute the negative pressure measurement and control method described in any of the above embodiments.

[0038] The working principle and beneficial effects of this invention are as follows:

[0039] This invention discloses a negative pressure measurement and control method. Its underlying control logic involves measuring and controlling the negative pressure area to maintain its effectiveness. This ensures that the negative pressure loss at the stepped positions within the area reaches a controllable threshold, thereby enhancing the fluid attraction of the negative pressure within the area. Specifically, during operation, a negative pressure source is first activated according to a preset value to achieve an initial negative pressure state within the area. Simultaneously, multiple negative pressure detection points are performed within the area to obtain negative pressure values. Furthermore, a vertical negative pressure loss value is obtained along the direction perpendicular to the negative pressure surface. Negative pressure compensation points are then arranged in an array corresponding to the detection positions. The working state within the negative pressure area requires a continuous negative pressure along the direction of negative pressure action, sufficient to absorb liquid. Therefore, the negative pressure value at the negative pressure source can be selectively adjusted based on the vertical negative pressure loss value, or the negative pressure compensation points can be selectively activated. Alternatively, a combination of these two methods can be used to avoid excessive pressure drop due to negative pressure attracting liquid, thus reducing the effectiveness of the negative pressure effect. Attached Figure Description

[0040] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0041] Figure 1 This is a schematic diagram of the steps in Embodiment 1 of the control method of the present invention;

[0042] Figure 2 This is a schematic diagram of the negative pressure action area of ​​the treatment device of the present invention, wherein the dashed line shows the horizontal area of ​​one possible embodiment.

[0043] Figure 3 This is a schematic diagram of the steps in Embodiment 2 of the control method of the present invention;

[0044] Figure 4 This is a schematic diagram of the steps in Embodiment 3 of the control method of the present invention;

[0045] Figure 5 This is a schematic diagram of another possible embodiment of the negative pressure action area of ​​the treatment device of the present invention, wherein the dashed line shows the horizontal area of ​​one possible embodiment;

[0046] Figure 6 This is a schematic diagram of step 4 of the control method of the present invention;

[0047] Figure 7 This is a schematic diagram of the control layout of the treatment device of the present invention;

[0048] In the diagram: 1. Drainage dressing, 2. Sealing film, 3. Negative pressure detection head, 4. Negative pressure compensation point, 5. Main negative pressure port. Detailed Implementation

[0049] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. 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.

[0050] Example 1, such as Figures 1-2 As shown in the figure, this embodiment proposes a negative pressure measurement and control method, which includes the following steps:

[0051] S100: Turn on the negative pressure source with the initial preset value and keep the negative pressure at the negative pressure source stable at the preset value;

[0052] S200: Detects multiple negative pressure values ​​within the negative pressure area;

[0053] S300: Obtain the vertical negative pressure loss value between multiple negative pressure detection positions in the direction perpendicular to the negative pressure action surface;

[0054] S400: Arrange a negative pressure compensation point array according to the negative pressure detection location;

[0055] S500: Selectively adjusts the negative pressure value at the negative pressure source based on the vertical negative pressure loss value.

[0056] And / or

[0057] Selectively adjust the negative pressure compensation point

[0058] This ensures that multiple vertical negative pressure loss values ​​within the negative pressure area, from the direction closest to the negative pressure surface, sequentially reach the loss threshold.

[0059] This embodiment discloses a negative pressure measurement and control method. Its inherent control logic involves measuring and controlling the negative pressure area to maintain its effectiveness. This ensures that the negative pressure loss at the stepped positions within the area reaches a controllable threshold, thereby increasing the fluid attraction of the negative pressure within the area. Specifically, during operation, a negative pressure source is first activated according to a preset value to achieve an initial negative pressure state within the area. Simultaneously, multiple negative pressure detection points are performed within the area to obtain negative pressure values. Furthermore, a vertical negative pressure loss value is obtained along the direction perpendicular to the negative pressure surface. Negative pressure compensation points are then arranged in an array corresponding to the negative pressure detection positions. The operating state within the negative pressure area needs to maintain a continuous negative pressure along the direction of negative pressure action, ensuring sufficient liquid absorption capacity. Therefore, the negative pressure value at the negative pressure source can be selectively adjusted based on the vertical negative pressure loss value, or the negative pressure compensation points can be selectively activated. Alternatively, a combination of these two methods can be used to avoid excessive negative pressure drop due to liquid attraction, thus reducing the effectiveness of the negative pressure effect.

[0060] In a possible embodiment, within the negative pressure application area, the negative pressure application surface serves as the bottom plane. The area at a certain height vertically from the bottom plane is a region of negative pressure application. The main operating end of the negative pressure source is located directly above the bottom plane. Multiple negative pressure detection positions are set in the direction perpendicular to the bottom plane; exemplarily, four detection positions are set. Vertically, the negative pressure application area is divided into horizontal regions one, two, three, and four. Following this example, a negative pressure detection position is set near the bottom of horizontal region one. Similarly, negative pressure detection positions are also set at the bottom of horizontal regions two, three, and four. A negative pressure compensation point is set near the top of horizontal region one; similarly, negative pressure compensation points are also set at the top of horizontal regions two, three, and four. Set up negative pressure compensation points. Based on the above arrangement, the negative pressure detection location detects the negative pressure value, and then obtains the vertical negative pressure loss value of each horizontal area. For example, when the vertical negative pressure loss value of horizontal area two does not meet the normal working requirements, the negative pressure value at the negative pressure source can be adjusted, or the negative pressure compensation point in horizontal area two can be selectively activated. Of course, the above two methods can also be combined to keep the vertical negative pressure loss value in horizontal area two within the range that meets the working requirements. Through this adjustment method, the vertical negative pressure loss values ​​from horizontal area four to horizontal area one will reach the loss threshold in sequence. Then, the negative pressure in the negative pressure action area and the negative pressure action surface can be kept within the negative pressure range required for normal working from far to near.

[0061] Example 2, see Figure 2 and Figure 3 This application also discloses a negative pressure measurement and control method, which includes the following steps:

[0062] S100: Turn on the negative pressure source with the initial preset value and keep the negative pressure at the negative pressure source stable at the preset value;

[0063] S200: Detects multiple negative pressure values ​​within the negative pressure area;

[0064] S300: Obtain the vertical negative pressure loss value between multiple negative pressure detection positions in the direction perpendicular to the negative pressure action surface;

[0065] S400: Arrange a negative pressure compensation point array according to the negative pressure detection location;

[0066] S500: Selectively adjusts the negative pressure value at the negative pressure source based on the vertical negative pressure loss value.

[0067] And / or

[0068] Selectively adjust the negative pressure compensation point

[0069] This ensures that the vertical negative pressure loss value in the negative pressure area, from the direction away from the negative pressure surface, is periodically maintained from the attenuation value to the working value, until the attenuation value reaches the loss threshold, at which point the area that has reached the loss threshold is kept in a maintained state.

[0070] In this embodiment, based on the above embodiments, the process of the vertical negative pressure loss value reaching the loss threshold in different areas within the negative pressure action area is further optimized. The negative pressure action area is the process of absorbing and transporting fluid (liquid). When the fluid is attracted and transported by negative pressure in the negative pressure action area, referring to horizontal areas one to four in embodiment 1, the fluid will pass through horizontal areas one to four in sequence. The vertical negative pressure loss value of horizontal areas one to four will change continuously. In order to better maintain the negative pressure within the required range during operation, the vertical negative pressure loss value in each horizontal area in the negative pressure action area from the direction away from the negative pressure action surface can be periodically maintained from the attenuation value to the working value. The so-called attenuation value means that when the fluid is attracted by negative pressure and flows through the corresponding area, the vertical negative pressure loss value increases, causing the negative pressure to attenuate to a certain extent. The working value is the required value under normal working conditions. After periodically attenuating and maintaining, the horizontal area farthest from the negative pressure action surface will reach the loss threshold, and at this time, the negative pressure can be maintained in the area that has reached the loss threshold.

[0071] Example 3, see Figure 4 and Figure 5 This application also proposes a negative pressure measurement and control method, which includes the following steps:

[0072] S100: Turn on the negative pressure source with the initial preset value and keep the negative pressure at the negative pressure source stable at the preset value;

[0073] S200: Detects multiple negative pressure values ​​within the negative pressure area;

[0074] S300: Obtain the vertical negative pressure loss value between multiple negative pressure detection positions in the direction perpendicular to the negative pressure action surface;

[0075] S400: Obtain the sub-vertical negative pressure loss value between multiple negative pressure detection positions in a plane parallel to the negative pressure action surface;

[0076] S500: Arrange a negative pressure compensation point array according to the negative pressure detection location;

[0077] S600:

[0078] The negative pressure value at the negative pressure source is selectively adjusted based on the vertical negative pressure loss value.

[0079] And / or

[0080] Selectively turn on or keep the negative pressure compensation point closed;

[0081] This allows multiple vertical negative pressure loss values ​​within the negative pressure area to selectively and sequentially reach the loss threshold from the direction closest to the negative pressure surface.

[0082] In this embodiment, based on the above embodiments, the vertical negative pressure loss value between multiple negative pressure detection positions along the vertical direction of the negative pressure action surface is obtained, and the sub-vertical negative pressure loss value between multiple negative pressure detection positions in a plane parallel to the negative pressure action surface is further obtained. The corresponding negative pressure detection positions are then further optimized and improved. Based on the above embodiments, for example, three negative pressure detection positions are set at horizontal intervals near the bottom area in horizontal region one, and horizontal regions two to four are arranged similarly. Correspondingly, three negative pressure compensation points are also set near the top area in horizontal region one, corresponding to the three negative pressure detection positions. Taking horizontal region two as an example, in... The vertical negative pressure loss value within horizontal region two can also be used to obtain sub-vertical negative pressure loss values ​​one to three. When measuring and controlling the negative pressure in horizontal region two, considering that the distribution of the negative pressure-attracted fluid cannot be kept completely uniform and cover horizontal region two, the sub-vertical negative pressure loss values ​​one to three within horizontal region two can be adjusted in a timely manner according to the working conditions. For example, if fluid flows through the areas corresponding to sub-vertical negative pressure loss values ​​one and three, the control scheme in Example 1 can be used. When there is no fluid or little fluid flowing through the area corresponding to sub-vertical negative pressure loss value two, the negative pressure compensation point in the corresponding area can be selectively closed. The above control can be dynamically selected.

[0083] Example 4, see Figure 5 and Figure 6 This application also proposes a negative pressure measurement and control method, which includes the following steps:

[0084] S100: Turn on the negative pressure source with the initial preset value and keep the negative pressure at the negative pressure source stable at the preset value;

[0085] S200: Detects multiple negative pressure values ​​within the negative pressure area;

[0086] S300: Obtain the vertical negative pressure loss value between multiple negative pressure detection positions in the direction perpendicular to the negative pressure action surface;

[0087] S400: Obtain the sub-vertical negative pressure loss value between multiple negative pressure detection positions in a plane parallel to the negative pressure action surface;

[0088] S500: Arrange a negative pressure compensation point array according to the negative pressure detection location;

[0089] S610: Determine whether the sub-vertical negative pressure loss value is greater than the lower limit of loss and less than the loss threshold;

[0090] S710: If so, increase the negative pressure value at the negative pressure source.

[0091] And / or

[0092] Selectively activate the negative pressure compensation point;

[0093] S620: Determine whether the vertical negative pressure loss value is not greater than the lower limit of the loss;

[0094] S720: If so, close the negative pressure compensation point at the corresponding location;

[0095] S800: Enables multiple vertical negative pressure loss values ​​within the negative pressure area to selectively and sequentially reach the loss threshold from the direction closest to the negative pressure surface.

[0096] In this embodiment, based on the above embodiments, the judgment logic for the sub-vertical negative pressure loss value is specifically implemented by taking one region as an example, such as horizontal region two. When fluid is attracted by negative pressure and passes through this region normally, the sub-vertical negative pressure loss value of this region will decrease, but not to the point of decreasing to the loss threshold. The loss threshold can be understood as the maximum sub-vertical negative pressure loss value reached by fluid flowing through this region and the fluid in this region being saturated. At the same time, as long as there is still fluid flowing through this region, the vertical negative pressure will be lost to a certain extent. If no fluid flows through this region, the medium present in this region will also cause negative pressure. A certain degree of loss can be used as the lower limit of loss. Therefore, when the partial vertical negative pressure loss value is between the lower limit of loss and the loss threshold, the negative pressure environment in this area can be maintained by combining or applying the methods of increasing the negative pressure value of the negative pressure source and turning on the negative pressure compensation point. Furthermore, when the partial vertical negative pressure loss value is not greater than the lower limit of loss, the corresponding negative pressure compensation point can be turned off. Through the above-mentioned further combination of methods, the area that needs to maintain the working negative pressure range can be maintained, while the area with less or no fluid does not need to maintain the negative pressure to the working range by compensation.

[0097] Example 5, see Figure 2 , Figure 5 and Figure 7 This application also discloses a negative pressure wound therapy device, which includes a negative pressure source, a control unit, a drainage dressing, a sealing film, and multiple negative pressure detection heads and multiple negative pressure tubes. The drainage dressing covers the negative pressure application surface, and the sealing film covers the drainage dressing to form a sealed space. One end of each of the multiple negative pressure tubes is connected to the negative pressure source, and the other end of one of the negative pressure tubes serves as a main negative pressure port connected to the sealed space via the sealing film. The other ends of the remaining negative pressure tubes are arranged as a negative pressure compensation point array within the drainage dressing. The negative pressure detection heads correspond to the positions of the negative pressure compensation points. The control unit is communicatively connected to the negative pressure source and is used to execute the negative pressure measurement and control method described in any of the above embodiments.

[0098] This embodiment discloses a negative pressure wound therapy device. The negative pressure measurement and control method described in the above embodiment is applied to this device. Specifically, the device includes a negative pressure source, a control unit, and a drainage dressing, a sealing film, a negative pressure tube, and a negative pressure detection head for forming a negative pressure area. In use, the negative pressure detection head and the negative pressure tube, which serves as a negative pressure compensation point, are first arranged in an array within the drainage dressing. Then, the drainage dressing is sealed with the sealing film. The negative pressure tube, serving as the main negative pressure port, is connected to the sealed space inside the device, i.e., the negative pressure area, through the sealing film. The main negative pressure port reflects the negative pressure value at the negative pressure source. The negative pressure compensation point is connected to the negative pressure source, and its negative pressure value can be independently adjusted or selected to be the same as the negative pressure source. All negative pressure tubes are connected to the negative pressure source. The control unit is communicatively connected to the negative pressure source and can control the pressure value, start / stop, and connection / disconnection between the negative pressure source and each negative pressure tube. The control unit is used to execute the control method described in the above embodiment.

[0099] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A negative pressure wound therapy device, the device comprising a negative pressure source, a control unit, a drainage dressing, a occlusive dressing, multiple negative pressure detection heads, and multiple negative pressure tubes, wherein, The drainage dressing is used to cover the negative pressure application surface. The sealing film covers the drainage dressing to form a sealed space. One end of each of the multiple negative pressure tubes is connected to the negative pressure source. The other end of one of the negative pressure tubes serves as the main negative pressure port, connected to the sealed space via the sealing film. The other ends of the remaining negative pressure tubes are arranged as a negative pressure compensation point array within the drainage dressing. The negative pressure detection head corresponds to the position of the negative pressure compensation points. The control unit is communicatively connected to the negative pressure source. The control unit is used to execute the negative pressure measurement control method, characterized in that the control method includes the following steps: Turn on the negative pressure source with the initial preset value and keep the negative pressure at the negative pressure source stable at the preset value; Detect multiple negative pressure values ​​within the negative pressure area; Obtain the vertical negative pressure loss value between multiple negative pressure detection positions along a direction perpendicular to the negative pressure action surface, wherein the negative pressure action surface is the bottom plane within the negative pressure action area; Obtain the sub-vertical negative pressure loss value between multiple negative pressure detection positions in a plane parallel to the negative pressure action surface; The negative pressure detection position corresponds to the negative pressure compensation point position so that the negative pressure compensation points form an array; The negative pressure value at the negative pressure source is selectively adjusted based on the vertical negative pressure loss value. And / or Selectively activate negative pressure compensation points So that multiple vertical negative pressure loss values ​​in the negative pressure area from the direction closest to the negative pressure surface sequentially reach a loss threshold, wherein the loss threshold is the maximum value of the sub-vertical negative pressure loss value due to fluid saturation in the area through which the fluid flows.

2. The negative pressure wound therapy device according to claim 1, characterized in that, The step "multiple vertical negative pressure loss values ​​within the negative pressure area sequentially reach the loss threshold from the direction closest to the negative pressure surface" specifically refers to: Within the negative pressure area, the vertical negative pressure loss value from the direction away from the negative pressure surface is periodically maintained from the attenuation value to the working value until the attenuation value reaches the loss threshold, at which point the area that has reached the loss threshold is in a maintained state.

3. The negative pressure wound therapy device according to claim 2, characterized in that, The step "selectively adjust the negative pressure value at the negative pressure source based on the vertical negative pressure loss value" is followed. And / or Selectively adjust the negative pressure compensation point To ensure that multiple vertical negative pressure loss values ​​within the negative pressure application area sequentially reach the loss threshold from the direction closest to the negative pressure application surface, further: The negative pressure value at the negative pressure source is selectively adjusted based on the vertical negative pressure loss value. And / or Selectively turn on or keep the negative pressure compensation point closed; This allows multiple vertical negative pressure loss values ​​within the negative pressure area to selectively and sequentially reach the loss threshold from the direction closest to the negative pressure surface.

4. The negative pressure wound therapy device according to claim 3, characterized in that, The step is to selectively adjust the negative pressure value at the negative pressure source based on the sub-vertical negative pressure loss value. And / or "Selectively opening or keeping the negative pressure compensation point closed" specifically means: Determine if the vertical negative pressure loss value is greater than the lower limit of loss but less than the loss threshold. If so, increase the negative pressure value at the negative pressure source. And / or Selectively activate the negative pressure compensation point.

5. The negative pressure wound therapy device according to claim 4, characterized in that, The step is to selectively adjust the negative pressure value at the negative pressure source based on the sub-vertical negative pressure loss value. And / or "Selectively turning on or keeping the negative pressure compensation point off" specifically means: determining whether the vertical negative pressure loss value is not greater than the lower limit of the loss; if so, turning off the negative pressure compensation point at the corresponding location.

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