Wound negative pressure therapy apparatus with air leak alarm function
By introducing strain gauge-type negative pressure sensors and high-precision pressure sensors into the wound negative pressure therapy device, the problem of air leakage detection is solved, ensuring the stability and safety of the treatment effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUIZHI WIMI (XIAN) MEDICAL TECHNOLOGY CO LTD
- Filing Date
- 2025-03-03
- Publication Date
- 2026-07-07
AI Technical Summary
Existing wound negative pressure therapy devices lack air leakage detection components, making it impossible to detect broken or leaking connecting pipes in a timely manner, thus affecting the treatment effect.
The wound negative pressure therapy device incorporates strain gauge negative pressure sensors and high-precision pressure sensors, combined with alarm components, to monitor and alarm for air leakage in real time, ensuring treatment effectiveness.
It enables timely detection and alarm of gas leaks, avoiding a decline in treatment effectiveness due to gas leaks and improving the reliability and safety of treatment.
Smart Images
Figure CN224462023U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of negative pressure therapy device technology, specifically a wound negative pressure therapy device with air leakage alarm function. Background Technology
[0002] Negative pressure wound therapy is an increasingly popular adjunctive treatment method for promoting wound healing in recent years. This treatment method is characterized by applying negative pressure to the wound surface, which not only reduces the size of the wound surface by uniformly receiving negative pressure, but also drains fluid, fills local defects in the wound, removes excess exudate, and provides a relatively moist rather than damp environment for wound closure, reduces edema in the tissues around the wound, and stimulates the proliferation of granulation tissue.
[0003] Most existing wound negative pressure therapy devices do not have a leak detection component when performing negative pressure therapy. They rely solely on the patient's sensation to determine whether there is a leak in the adhesive area during treatment, which cannot be adjusted in time and may affect the treatment effect. Furthermore, during long-term use, the connecting pipes may become damaged or leak, and it is impossible to detect and replace them in time. Utility Model Content
[0004] The purpose of this invention is to provide a wound negative pressure therapy device with a leak alarm function to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a wound negative pressure therapy device with a leak alarm function, comprising a control console, a connecting pipe at the rear end of the control console, a negative pressure source at the rear end of the connecting pipe, a skin-friendly membrane on the outer surface of the negative pressure source, and the bottom of the skin-friendly membrane extending from the bottom of the negative pressure source, a strain gauge-type negative pressure sensor on the outer surface of the connecting pipe, a first adhesive layer at the bottom of the skin-friendly membrane, a negative pressure zone at the bottom of the skin-friendly membrane near the negative pressure source, and a... A third adhesive area is provided, and a cavity area is provided at the bottom of the skin-friendly film near the third adhesive area. A second adhesive area is provided at the bottom end of the skin-friendly film near the cavity area. Several through holes are arranged through the cavity area. A flexible tube is provided on the top of the skin-friendly film above the several through holes. The tops of the several flexible tubes are connected to a base, and the tops of the several flexible tubes extend out of the top of the base. A control board is provided on the top of the base. Several plugs matching the flexible tubes are arranged on the circumferential surface of the control board. A high-precision pressure sensor is provided on the top of the base.
[0006] Preferably, the bottoms of the plurality of plungers extend into the corresponding hoses, and the bottoms of the plungers are in contact with the inner wall of the hoses. When negative pressure air is drawn into the hoses, the plungers are pulled downwards.
[0007] Preferably, a small spring is connected to the middle position of the top of the chassis and the middle position of the bottom of the control board. The small spring provides support for the control board, so that there is a certain gap between the control board and the chassis. At the same time, if the control board is driven to move downward, the spring accumulates pressure to ensure that the control board can be reset.
[0008] Preferably, the bottom of the console is provided with a support platform to support the console. At the same time, the bottom of the support platform is provided with several self-locking casters, which can drive the console to move, making it easy to move the wound negative pressure therapy device to the predetermined bed position.
[0009] Preferably, the top of the control console is equipped with an alarm component, which includes an LED light and a buzzer. When an air leak is detected in the wound negative pressure therapy device, the alarm component will sound an alarm to alert medical staff.
[0010] Preferably, the top of the high-precision pressure sensor extends out of the control board, and a data line is provided at the top of the high-precision sensor. One end of the data line is installed at the rear of the control console. When the pressure sensor receives pressure, the data is transmitted to the integrated circuit inside the control console through the data line.
[0011] Compared with the prior art, the beneficial effects of this utility model are:
[0012] 1. The present invention relates to a wound negative pressure therapy device with an air leakage alarm function. During negative pressure therapy, if air leakage occurs due to incomplete adhesion in the third adhesive area near the negative pressure zone separated by the second and third adhesive areas, the cavity area and the negative pressure zone become connected. In this case, the negative pressure source creates negative pressure inside the cavity area. A downward pulling force is applied to the plunger through a flexible tube, causing the control board to apply pressure to a high-precision pressure sensor. The high-precision pressure sensor transmits signal data to the control console to issue an alarm and alert the caregiver, thus preventing incomplete adhesion during negative pressure therapy and ensuring the effectiveness of the treatment.
[0013] 2. The wound negative pressure therapy device with air leakage alarm function of this utility model uses a strain gauge negative pressure sensor set at the connection pipe to detect the negative pressure of the connection pipe. If the negative pressure monitored by the strain gauge negative pressure sensor is lower than the negative pressure value set on the control panel, it means that the connection pipe is damaged or leaking, which can be easily repaired or replaced in time. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0015] Figure 2 This is a top-view three-dimensional schematic diagram of the skin-friendly membrane structure of this utility model;
[0016] Figure 3 For the present utility model Figure 2 Enlarged schematic diagram of the structure at point A in the middle;
[0017] Figure 4 This is a bottom-view perspective view of the skin-friendly membrane structure of this utility model.
[0018] Figure 5 This is a schematic diagram of the control board structure of this utility model.
[0019] In the diagram: 1. Control console; 2. Alarm component; 3. Support platform; 4. Connecting pipe; 5. Strain gauge type negative pressure sensor; 6. Skin-friendly membrane; 7. Data cable; 8. Control board; 9. Chassis; 10. Hoses; 11. High-precision pressure sensor; 12. Miniature spring; 13. Cavity area; 14. First adhesive layer; 15. Second adhesive area; 16. Third adhesive area; 17. Negative pressure area; 18. Through hole; 19. Plug; 20. Negative pressure source. Detailed Implementation
[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0021] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0022] like Figures 1 to 5As shown, this embodiment of the wound negative pressure therapy device with air leakage alarm function includes a control console 1. A monitoring module is installed inside the control console 1. A connecting pipe 4 is located at the rear end of the control console 1, and a negative pressure source 20 is located at the rear end of the connecting pipe 4. The connecting pipe 4, through the control console 1, causes the negative pressure source 20 to generate suction. The negative pressure source 20 is placed close to the wound, creating a negative pressure state at the wound location, promoting the drainage of fluids and exudates from the wound, and accelerating wound healing. A skin-friendly membrane 6 is provided on the outer surface of the wound negative pressure source 20, and the bottom of the skin-friendly membrane 6 extends beyond the bottom of the negative pressure source 20. The skin-friendly membrane 6 is made of natural fiber material, has good breathability, and improves the user experience. A strain gauge-type negative pressure sensor 5 is installed on the outer surface of the connecting pipe 4. When the strain gauge-type negative pressure sensor 5 is subjected to negative pressure, the internal diaphragm or other sensitive components will deform, causing a change in the resistance of the strain gauge. This change in resistance can be detected by a bridge circuit and converted into a voltage signal to detect the negative pressure value inside the connecting pipe 4. The strain gauge-type negative pressure sensor 5 is electrically connected to the monitoring module inside the control console 1 to detect the negative pressure value monitored by the strain gauge-type negative pressure sensor 5 and compare it with the negative pressure value inside the connecting pipe 4 for recording. If the negative pressure inside the connecting pipe 4 is lower than a preset value, it indicates that the connecting pipe 4 has been damaged or leaking. A first adhesive layer 14 is provided at the bottom of the skin-friendly membrane 6. A negative pressure zone 17 is provided at the bottom of the skin-friendly membrane 6 near the negative pressure source 20. A third adhesive zone 16 is provided at the bottom of the skin-friendly membrane 6 near the negative pressure zone 17. A cavity zone 13 is provided at the bottom of the skin-friendly membrane 6 near the third adhesive zone 16. A second adhesive zone 15 is provided at the bottom of the skin-friendly membrane 6 near the cavity zone 13. When the bottom of the skin-friendly membrane 6 is adhered to the area around the patient's wound through the first adhesive layer 14, the negative pressure source 20 is located above the wound, and the third adhesive zone 16 is adhered to the skin around the wound, thus sealing the negative pressure zone 17. Then, the second adhesive zone 15 is adhered to the skin, making... The cavity area 13 is closed, and several through holes 18 are arranged through it. A flexible tube 10 is installed on the top of the skin-friendly membrane 6 above the through holes 18. The tops of the flexible tubes 10 are connected to a base plate 9, and the tips of the flexible tubes 10 extend beyond the top of the base plate 9. A control plate 8 is installed on the top of the base plate 9. Several plugs 19 matching the flexible tubes 10 are arranged on the circumferential surface of the control plate 8. A high-precision pressure sensor 11 is installed on the top of the base plate 9. During negative pressure therapy, the negative pressure source 20 creates negative pressure in the negative pressure area 17, providing negative pressure treatment to the wound, promoting the drainage of fluids and exudates from the wound, and accelerating wound healing.During treatment, if air leakage occurs in the third adhesive area 16, the cavity area 13 and the negative pressure area 17 will connect. The negative pressure source 20 will then generate suction on the cavity area 13, which, through the through-hole 18 and the hose 10, will pull the bottom of the plug 19, causing the control plate 8 to descend. As the control plate 8 descends, it will compress the high-precision pressure sensor 11. The high-precision pressure sensor 11 is electrically connected to the monitoring module inside the control console 1. When the high-precision pressure sensor 11 is under pressure, it will transmit a data signal to the monitoring module to issue an alarm, alerting medical staff to prevent air leakage in the negative pressure area 17 during treatment, which could affect the treatment outcome.
[0023] Specifically, the bottom of each plunger 19 extends into the corresponding hose 10, and the bottom of the plunger 19 is in contact with the inner wall of the hose 10. When negative pressure air is drawn into the hose 10, the plunger 19 is pulled downward.
[0024] Furthermore, a small spring 12 is connected to the middle position of the top of the chassis 9 and the middle position of the bottom of the control plate 8. The small spring 12 provides support for the control plate 8, so that there is a certain gap between the control plate 8 and the chassis 9. At the same time, if the control plate 8 is driven to move downward, the spring accumulates pressure to ensure that the control plate 8 can be reset.
[0025] Furthermore, a support platform 3 is provided at the bottom of the control console 1, which supports the control console 1. At the same time, the bottom of the support platform 3 is provided with several self-locking casters, which can drive the control console 1 to move, making it easy to move the wound negative pressure therapy device to the predetermined bed position.
[0026] Furthermore, an alarm component 2 is installed on the top of the control panel 1. The alarm component 2 contains an LED light and a buzzer. When an air leak is detected in the wound negative pressure therapy device, the alarm component 2 will sound an alarm to alert medical staff.
[0027] Furthermore, a control board 8 extends from the top of the high-precision pressure sensor 11, and a data line 7 is provided at the top of the high-precision sensor. One end of the data line 7 is installed at the rear end of the control console 1. When the pressure sensor receives pressure, it transmits the data to the integrated circuit inside the control console 1 through the data line 7.
[0028] The method of use in this embodiment is as follows: When using the wound negative pressure therapy device, the bottom of the skin-friendly film 6 is adhered to the patient's wound through the first adhesive layer 14. The negative pressure source 20 is located above the wound, and the third adhesive area 16 is adhered to the skin around the wound, making the negative pressure area 17 closed. Then, the second adhesive area 15 is adhered to the skin, making the cavity area 13 closed. During negative pressure therapy, the negative pressure source 20 creates negative pressure in the negative pressure area 17, providing negative pressure treatment to the wound, promoting the drainage of fluids and exudates from the wound, and accelerating wound healing. If air leakage occurs in the third adhesive area 16 during treatment, continued use may result in air leakage and affect the negative pressure therapy effect. At this time, the cavity area 13 and the negative pressure area 17 are connected, and the negative pressure source 20 will generate suction on the cavity area 13, which will suction the bottom of the plug 19 through the through hole 18 and the hose 10, causing the control plate 8 to descend. When the control plate 8 descends... The high-precision pressure sensor 11 is compressed and electrically connected to the monitoring module inside the control console 1. When the high-precision pressure sensor 11 is subjected to pressure, it will transmit data signals to the monitoring module to issue an alarm and alert medical staff to avoid air leakage in the negative pressure zone 17 during treatment. At the same time, when the strain gauge negative pressure sensor 5 is subjected to negative pressure, the internal diaphragm or other sensitive components will deform, causing the resistance of the strain gauge to change. This resistance change can be detected by the bridge circuit and converted into a voltage signal to detect the negative pressure value inside the connecting pipe 4. The strain gauge negative pressure sensor 5 is electrically connected to the monitoring module inside the control console 1 to detect the negative pressure value monitored by the strain gauge negative pressure sensor 5 and compare it with the negative pressure value inside the connecting pipe 4 for recording. If the negative pressure inside the connecting pipe 4 is lower than the preset value, it means that the connecting pipe 4 has been damaged or leaking.
[0029] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A wound negative pressure therapy device with air leakage alarm function, comprising a control console (1), characterized in that: The console (1) has a connecting pipe (4) at its rear end, and a negative pressure source (20) is provided at the rear end of the connecting pipe (4). A skin-friendly membrane (6) is provided on the outer surface of the negative pressure source (20), and the bottom of the skin-friendly membrane (6) extends from the bottom of the negative pressure source (20). A strain gauge type negative pressure sensor (5) is provided on the outer surface of the connecting pipe (4). A first adhesive layer (14) is provided at the bottom end of the skin-friendly membrane (6). A negative pressure area (17) is provided at the bottom of the skin-friendly membrane (6) near the negative pressure source (20). A third adhesive area (16) is provided at the bottom of the skin-friendly membrane (6) near the negative pressure area (17). A cavity area (13) is provided at the bottom of the skin-friendly membrane (6) near the cavity area (13). A second adhesive area (15) is provided at the bottom of the skin-friendly membrane (6). A number of through holes (18) are provided through the cavity area (13). A flexible tube (10) is provided on the top of the skin-friendly membrane (6) above the number of through holes (18). The top of the number of flexible tubes (10) is connected to a chassis (9). The top of the number of flexible tubes (10) extends out of the top of the chassis (9). A control plate (8) is provided on the top of the chassis (9). A number of plugs (19) matching the flexible tubes (10) are provided on the circumferential surface of the control plate (8). A high-precision pressure sensor (11) is provided on the top of the chassis (9).
2. The wound negative pressure therapy device with air leakage alarm function according to claim 1, characterized in that: The bottoms of several of the plungers (19) extend into the interior of the corresponding hoses (10).
3. The wound negative pressure therapy device with air leakage alarm function according to claim 1, characterized in that: A small spring (12) is connected to the middle position of the top of the chassis (9) and the middle position of the bottom of the control board (8).
4. The wound negative pressure therapy device with air leakage alarm function according to claim 1, characterized in that: The bottom of the control console (1) is provided with a support platform (3).
5. The wound negative pressure therapy device with air leakage alarm function according to claim 1, characterized in that: An alarm component (2) is provided on the top of the console (1).
6. The wound negative pressure therapy device with air leakage alarm function according to claim 1, characterized in that: The control board (8) extends from the top of the high-precision pressure sensor (11), and a data line (7) is provided at the top of the high-precision sensor. One end of the data line (7) is installed at the rear end of the control console (1).