Device and method for removing bacterial biofilm from infected wound

By designing a bacterial biofilm removal device for infected wounds including a brush handle, a brush head, a sterile gauze and a fixing device, the problem of low removal efficiency in the prior art is solved, efficient and simple biofilm removal is achieved, and the durability and practicality of the device are improved.

CN119745537AInactive Publication Date: 2025-04-04CHENGDU MILITARY GENERAL HOSPITAL OF PLA
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Patent Information

Application Number
CN202411921902.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-25
Publication Date
2025-04-04
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

The prior art lacks a labor-saving cleaning tool or equipment for effectively removing bacterial biofilms from infected wounds, resulting in low removal efficiency.

Method used

A biofilm removal device for infected wounds is designed, including a brush handle, a brush head, a sterile gauze and a fixing device. The brush head is driven by a motor to rotate, and combined with the cooperation of the brush handle and the brush head, the wound biofilm is removed.

Benefits of technology

The equipment can efficiently remove wound biofilm through simple operation, which is simple to operate and labor-saving, improves removal efficiency, and the device is removable, making it easy to clean and replace sterile gauze, improving the durability and practicality of the device.

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Abstract

The invention discloses a device and a method for removing a bacterial biological membrane of an infected wound, and relates to the technical field of biological membrane removing equipment. The infected wound bacterial biofilm removing equipment comprises a brush handle, a brush head, sterile gauze and a fixing device, the brush handle is provided with a battery, a motor and a controller, a knob is arranged on the outer surface of the controller, the output end of the motor is fixedly connected with a rotating shaft, the output end of the rotating shaft is fixedly connected with a clamping hook, and an internal groove is formed in the brush head. A first spring, a connecting seat and a guide seat are fixedly connected to the inner surface of the internal groove, a clamping seat is fixedly connected to the end of the first spring, a sliding block and a fixed block are fixedly connected to the outer surface of the clamping seat, a rotating rod is rotatably connected to the interior of the connecting seat, a movable pressing rod is sleeved with the guide seat, and a pressing block is fixedly connected to the end of the movable pressing rod; the outer surface of the brush head is fixedly connected with a limiting plate, so that a biological membrane of a wound can be more efficiently removed, and the operation is simple and convenient.
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Description

Technical Field

[0001] The invention relates to the technical field of biofilm removal equipment, in particular to a device for removing bacterial biofilm from an infected wound and a removal method thereof. Background Art

[0002] Biofilm is a complex of microbial communities, composed of bacteria and fungi, which synthesize and secrete a protective matrix that firmly attaches the biofilm to living or non-living surfaces. Biofilm can be described as bacteria hiding in a thick, slimy protective layer composed of sugars and proteins. The biofilm protective layer protects microorganisms from external hazards. Biofilms are common in wounds and can delay the healing process to some extent.

[0003] In the prior art, bacterial biofilms on infected wounds are usually removed manually, which is time-consuming, labor-intensive, and inefficient. In the process of removing biofilms, there is a lack of a labor-saving cleaning tool or equipment. Summary of the invention

[0004] In view of the deficiencies of the existing problems, the present invention provides an infected wound bacterial biofilm removal device and a removal method thereof to solve the existing problems raised in the above background technology.

[0005] To solve the above problems, the present invention is implemented through the following technical solutions: a device for removing bacterial biofilm from infected wounds, comprising a brush handle, a brush head, sterile gauze and a fixing device, the brush handle being provided with a battery, a motor and a controller, the outer surface of the controller being provided with a knob, the output end of the motor being fixedly connected to a rotating shaft, the output end of the rotating shaft being fixedly connected to a hook, the interior of the brush head being provided with an internal groove, the inner surface of the internal groove being fixedly connected to a first spring, a connecting seat and a guide seat, the end of the first spring being fixedly connected to a clamping seat, the outer surface of the clamping seat being fixedly connected to a sliding block and a fixing block, the interior of the connecting seat being rotatably connected to a rotating rod, the interior of the guide seat being provided with a movable pressure rod, and the The end of the movable pressure rod is fixedly connected to a pressure block, the outer surface of the brush head is fixedly connected to a limiting plate, the outer surface of the limiting plate is fixedly connected to a first magnetic plate, the fixing device includes a casing, the end of the casing is fixedly connected to a second magnetic plate, the interior of the casing is fixedly connected to a fixing screw sleeve, the internal thread of the fixing screw sleeve is connected to a threaded rod, the end of the threaded rod is fixedly connected to a rotating block, the end of the threaded rod away from the rotating block is rotatably connected to a connecting rod, the outer surface of the connecting rod is sleeved with a connecting sleeve, the end of the connecting rod away from the threaded rod is fixedly connected to a fixing plate, the side of the fixing plate away from the connecting rod is fixedly connected to a second spring, and the end of the connecting sleeve away from the connecting rod is fixedly connected to a pressure plate.

[0006] Preferably, a charging port is provided at the end of the brush handle, and the outer surface of the rotating shaft passes through the brush handle and extends to the outside.

[0007] Preferably, the outer surface of the holder is matched with the outer surface of the hook, the inner surface of the inner groove is provided with a slide groove, and the outer surface of the slider is slidably connected to the inside of the slide groove.

[0008] Preferably, the connecting seat is arranged in the middle of the outer surface of the rotating rod, the end of the rotating rod is rotatably connected to the outer surface of the fixed block, and the end of the rotating rod away from the fixed block is rotatably connected to the end of the movable pressure rod.

[0009] Preferably, the pressing block is arranged at an end of the movable pressing rod away from the rotating rod, the outer surface of the movable pressing rod is sleeved inside the brush head, and the pressing block is arranged outside the brush head.

[0010] Preferably, the outer surface of the threaded rod passes through the fixed screw sleeve, the rotary block is arranged on the outside of the casing, and the fixed screw sleeve is arranged in a ring along the outer surface of the casing.

[0011] Preferably, the outer surface of the fixing plate is sleeved and fitted with the inner surface of the connecting sleeve, and one end of the second spring away from the fixing plate is fixedly connected to the inner surface of the connecting sleeve.

[0012] Preferably, the pressing plate is arranged around the sterile gauze, and a side of the pressing plate away from the connecting sleeve is fixedly connected with an anti-slip protrusion, and the number of the anti-slip protrusions is several.

[0013] The invention discloses a method for removing bacterial biofilm from infected wounds by a device, comprising the following steps: holding the brush handle and inserting the rotating shaft into the internal groove until the hook and the holder cooperate with each other so that the brush handle and the brush head are installed together, then covering the sterile gauze on the brush head, and sleeve the fixing device 4 on the outer surface of the sterile gauze, the second spring is in a compressed state, and the elastic force of the second spring causes the pressing plate to be pressed tightly on the outer surface of the sterile gauze so that the sterile gauze is fixed on the brush head, adjusting the knob so that the motor starts and drives the rotating shaft to rotate, and after the brush head reaches a suitable speed, the sterile gauze on the brush head can be used to brush the patient's wound, and after use, the motor is turned off by adjusting the knob, the pressing block is pressed to separate the holder from the hook, the hook is released from restriction, the brush head is moved so that the rotating shaft leaves the internal groove so that the brush head is disassembled, and then the fixing device is removed to release the fixation of the sterile gauze so that the sterile gauze is removed from the brush head, the brush head is cleaned, and a new sterile gauze is replaced when the device is used to clean the wound next time.

[0014] The present invention provides a device and method for removing bacterial biofilm from infected wounds.

[0015] Beneficial effects:

[0016] 1. The bacterial biofilm removal device for infected wounds and the removal method thereof, through the coordination between the brush handle, the brush head, the sterile gauze, the motor and the rotating shaft, the motor drives the brush head to rotate, the brush handle is held and the brush head is aimed at the wound, the biofilm of the wound can be removed, the operation is simple and convenient, more labor-saving, and the removal efficiency is improved.

[0017] 2. The bacterial biofilm removal device for infected wounds and the removal method thereof, through the coordination between the hook, the first spring, the holder, the guide seat, the rotating rod, the movable pressure rod, the pressure block, the first magnetic plate and the fixing device, sets the brush head to a detachable structure, so that the brush head can be disassembled for cleaning after use, and the sterile gauze can also be removed by removing the fixing device, so that it is convenient to replace it with a new one when it is used next time, thereby improving the durability of the device and facilitating the repeated use of the device.

[0018] 3. The infected wound bacterial biofilm removal device and the removal method thereof, through the cooperation between the fixing device, the limit plate and the first magnetic plate, can enable the pressure plate to press the sterile gauze wrapped on the brush head under the elastic force of the second spring, thereby fixing the sterile gauze to prevent the sterile gauze from loosening when the brush head rotates, and the position of the pressure plate can be adjusted by rotating the rotary block, which is convenient for fixing sterile gauze of different thicknesses, thereby improving the practicability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 A second perspective structural schematic diagram of the present invention as a whole;

[0021] Figure 3 It is a schematic cross-sectional structure diagram of the present invention as a whole;

[0022] Figure 4 It is a schematic diagram of the enlarged structure of A of the present invention;

[0023] Figure 5 It is a schematic diagram of the overall split structure of the present invention;

[0024] Figure 6 It is a schematic structural diagram of the fixing device of the present invention.

[0025] In the figure: 1. brush handle; 2. brush head; 3. sterile gauze; 4. fixing device; 401. casing; 402. second magnetic plate; 403. fixing screw sleeve; 404. threaded rod; 405. rotary block; 406. connecting rod; 407. connecting sleeve; 408. pressure plate; 409. fixing plate; 410. second spring; 411. anti-skid protrusion; 5. charging port; 6. battery; 7. motor; 8. controller; 9. knob; 10. rotating shaft; 11. hook; 12. internal groove; 13. first spring; 14. holder; 15. slider; 16. slide groove; 17. fixing block; 18. connecting seat; 19. guide seat; 20. rotating rod; 21. movable pressure rod; 22. pressure block; 23. limit plate; 24. first magnetic plate. DETAILED DESCRIPTION

[0026] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

[0027] Example 1

[0028] like Figure 1-Figure 6As shown, the present invention provides a technical solution: a device for removing bacterial biofilm from infected wounds, comprising a brush handle 1, a brush head 2, a sterile gauze 3 and a fixing device 4, the brush handle 1 is provided with a battery 6, a motor 7 and a controller 8, the outer surface of the controller 8 is provided with a knob 9, the output end of the motor 7 is fixedly connected to a rotating shaft 10, the output end of the rotating shaft 10 is fixedly connected to a hook 11, the interior of the brush head 2 is provided with an inner groove 12, the inner surface of the inner groove 12 is fixedly connected to a first spring 13, a connecting seat 18 and a guide seat 19, the end of the first spring 13 is fixedly connected to a clamping seat 14, the outer surface of the clamping seat 14 is fixedly connected to a slider 15 and a fixed block 17, the interior of the connecting seat 18 is rotatably connected to a rotating rod 20, the interior of the guide seat 19 is sleeved with a movable pressure rod 21, the end of the movable pressure rod 21 is fixedly connected to a pressure block 22, and the brush head 2 is fixedly connected to a limit plate 23 on the outer surface, and a first magnetic plate 24 is fixedly connected to the outer surface of the limit plate 23. The fixing device 4 includes a casing 401, and a second magnetic plate 402 is fixedly connected to the end of the casing 401. A fixing screw sleeve 403 is fixedly connected to the interior of the casing 401, and a threaded rod 404 is threadedly connected to the interior of the fixing screw sleeve 403. A rotary block 405 is fixedly connected to the end of the threaded rod 404. A connecting rod 406 is rotatably connected to one end of the threaded rod 404 away from the rotary block 405. A connecting sleeve 407 is sleeved on the outer surface of the connecting rod 406. A fixing plate 409 is fixedly connected to one end of the connecting rod 406 away from the threaded rod 404. A second spring 410 is fixedly connected to the side of the fixing plate 409 away from the connecting rod 406, and a pressing plate 408 is fixedly connected to one end of the connecting sleeve 407 away from the connecting rod 406.

[0029] A charging port 5 is provided at the end of the brush handle 1 , and the outer surface of the rotating shaft 10 passes through the brush handle 1 and extends to the outside.

[0030] The outer surface of the clamping seat 14 is matched with the outer surface of the clamping hook 11 , the inner surface of the inner groove 12 is provided with a slide groove 16 , and the outer surface of the sliding block 15 is slidably connected inside the slide groove 16 .

[0031] The connecting seat 18 is arranged in the middle of the outer surface of the rotating rod 20 , the end of the rotating rod 20 is rotatably connected to the outer surface of the fixing block 17 , and the end of the rotating rod 20 away from the fixing block 17 is rotatably connected to the end of the movable pressure rod 21 .

[0032] The pressing block 22 is arranged at one end of the movable pressing rod 21 away from the rotating rod 20 . The outer surface of the movable pressing rod 21 is sleeved inside the brush head 2 , and the pressing block 22 is arranged outside the brush head 2 .

[0033] The outer surface of the threaded rod 404 passes through the fixed screw sleeve 403 . The rotary block 405 is arranged on the outer side of the casing 401 . The fixed screw sleeve 403 is arranged in a ring along the outer surface of the casing 401 .

[0034] The outer surface of the fixing plate 409 is sleeved and fitted with the inner surface of the connecting sleeve 407 , and one end of the second spring 410 away from the fixing plate 409 is fixedly connected to the inner surface of the connecting sleeve 407 .

[0035] The pressing plate 408 is arranged around the sterile gauze 3, and a side of the pressing plate 408 away from the connecting sleeve 407 is fixedly connected with a plurality of anti-slip protrusions 411.

[0036] A method for removing bacterial biofilm from infected wounds, comprising the following steps: holding a brush handle 1 and inserting a rotating shaft 10 into an internal groove 12 until a hook 11 and a clamping seat 14 cooperate with each other, so that the brush handle 1 and a brush head 2 are installed together, and then a sterile gauze 3 is wrapped on the brush head 2, and a fixing device 4 is sleeved on the outer surface of the sterile gauze 3, a second spring 410 is in a compressed state, and the elastic force of the second spring 410 causes a pressing plate 408 to be pressed against the outer surface of the sterile gauze 3, so that the sterile gauze 3 is fixed on the brush head 2, and a knob 9 is adjusted to start a motor 7 and drive the motor 7 to rotate. After the rotating shaft 10 rotates and the brush head 2 reaches a suitable rotation speed, the sterile gauze 3 on the brush head 2 can be used to brush the patient's wound. After use, the adjusting knob 9 is turned off the motor 7, and the pressure block 22 is pressed to separate the holder 14 from the hook 11. The hook 11 is released from the restriction, and the brush head 2 is moved to make the rotating shaft 10 leave the internal groove 12, so that the brush head 2 is disassembled, and then the fixing device 4 is removed to release the fixation of the sterile gauze 3, so that the sterile gauze 3 is removed from the brush head 2, and the brush head 2 is cleaned, and a new sterile gauze 3 is replaced when the device is used to clean the wound next time.

[0037] When in use, when the brush head 2 is installed on the brush handle 1, as the rotating shaft 10 is inserted into the inner groove 12, the hook 11 pushes the holder 14, so that the first spring 13 is compressed, and the slider 15 slides along the inner surface of the slide groove 16. When the end of the rotating shaft 10 abuts against the inner surface of the inner groove 12, the elastic force of the first spring 13 pushes the holder 14 to be stuck on the hook 11, and the hook 11 just cooperates with the holder 14, so that the rotating shaft 10 is fixed in the inner groove 12, thereby completing the installation of the brush head 2 on the brush handle. 1, after the sterile gauze 3 is wrapped on the brush head 2, the fixing device 4 is put on the outer surface of the sterile gauze 3, the pressing plate 408 drives the connecting sleeve 407 to squeeze the second spring 410, and the elastic force generated by the deformation of the second spring 410 makes the pressing plate 408 press on the sterile gauze 3, and the fixing device 4 moves to the first magnetic plate 24, and is adsorbed on the first magnetic plate 24 through the second magnetic plate 402, so that the fixing device 4 is fixed on the brush head 2, so that the sterile gauze 3 is fixed on the brush head 2, and the installation is completed. After the device is installed, the operation of removing the biofilm can be started. The knob 9 is rotated, and the motor 7 is started and the speed of the motor 7 is adjusted with the cooperation of the controller 8, so that the rotating shaft 10 drives the brush head 2 to rotate at a suitable speed, so that the rotating brush head 2 removes the biofilm on the wound. After the removal is completed, the pressing block 22 is pressed, and the movable pressing rod 21 moves linearly along the guide seat 19 and presses the rotating rod 20. With the cooperation of the connecting seat 18, the other end of the rotating rod 20 is lifted, and the clamping seat 14 moves accordingly, and the first spring 13 is Compression, when the pressing block 22 is pressed down to the maximum limit, the base 14 completely leaves the hook 11, and the brush head 2 is moved to make the rotating shaft 10 leave the inner groove 12, the brush head 2 is separated from the brush handle 1, and the fixing device 4 is pulled to make it leave the first magnetic plate 24, and the fixing device 4 is removed from the brush head 2, and then the sterile gauze 3 is removed from the brush head 2, so as to facilitate the cleaning of the brush head 2 and the replacement of the sterile gauze 3. The device is reusable, and the battery 6 is used to power the motor 7, and the charging port 5 is used to charge the battery 6.

[0038] By means of the fixing device 4, the threaded rod 404 is driven to move toward the outside of the casing 401 by rotating the rotary block 405. Since the threaded rod 404 is rotatably connected to the connecting rod 406, the pressure plates 408 are moved away from each other, so that the fixing device 4 can fix thicker sterile gauze 3. Similarly, the reverse rotation of the rotary block 405 can make the pressure plates 408 approach each other, so that the fixing device 4 can fix thinner sterile gauze 3. The thickness of the sterile gauze 3 can be adjusted according to actual needs.

[0039] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention are implemented according to the conventional means in the field unless otherwise specified and limited.

Claims

1. A device for removing bacterial biofilm from infected wounds, comprising a brush handle (1), a brush head (2), a sterile gauze (3) and a fixing device (4), characterized in that: The brush handle (1) is provided with a battery (6), a motor (7) and a controller (8); the outer surface of the controller (8) is provided with a knob (9); the output end of the motor (7) is fixedly connected to a rotating shaft (10); the output end of the rotating shaft (10) is fixedly connected to a hook (11); the interior of the brush head (2) is provided with an internal groove (12); the inner surface of the internal groove (12) is fixedly connected to a first spring (13), a connecting seat (18) and a guide seat (19). The end of the first spring (13) is fixedly connected to a holder (14), the outer surface of the holder (14) is fixedly connected to a slider (15) and a fixed block (17), the interior of the connecting seat (18) is rotatably connected to a rotating rod (20), the interior of the guide seat (19) is sleeved with a movable pressure rod (21), the end of the movable pressure rod (21) is fixedly connected to a pressure block (22), the outer surface of the brush head (2) is fixedly connected to a limiting plate (23), the limiting plate ( The outer surface of the fixing device (4) is fixedly connected to a first magnetic plate (24), the fixing device (4) comprises a casing (401), the end of the casing (401) is fixedly connected to a second magnetic plate (402), the interior of the casing (401) is fixedly connected to a fixing screw sleeve (403), the interior of the fixing screw sleeve (403) is threadedly connected to a threaded rod (404), the end of the threaded rod (404) is fixedly connected to a rotating block (405), and the threaded rod (404) is away from the rotating block. One end of the block (405) is rotatably connected to a connecting rod (406), the outer surface of the connecting rod (406) is sleeved with a connecting sleeve (407), one end of the connecting rod (406) away from the threaded rod (404) is fixedly connected to a fixing plate (409), a side of the fixing plate (409) away from the connecting rod (406) is fixedly connected to a second spring (410), and one end of the connecting sleeve (407) away from the connecting rod (406) is fixedly connected to a pressure plate (408).

2. The device for removing bacterial biofilm from infected wounds according to claim 1, characterized in that: A charging port (5) is provided at the end of the brush handle (1), and the outer surface of the rotating shaft (10) passes through the brush handle (1) and extends to the outside.

3. The device for removing bacterial biofilm from infected wounds according to claim 1, characterized in that: The outer surface of the clamping seat (14) is matched with the outer surface of the clamping hook (11), the inner surface of the inner groove (12) is provided with a slide groove (16), and the outer surface of the sliding block (15) is slidably connected inside the slide groove (16).

4. The device for removing bacterial biofilm from infected wounds according to claim 1, characterized in that: The connecting seat (18) is arranged in the middle of the outer surface of the rotating rod (20), the end of the rotating rod (20) is rotatably connected to the outer surface of the fixed block (17), and the end of the rotating rod (20) away from the fixed block (17) is rotatably connected to the end of the movable pressure rod (21).

5. The device for removing bacterial biofilm from infected wounds according to claim 1, characterized in that: The pressing block (22) is arranged at one end of the movable pressing rod (21) away from the rotating rod (20); the outer surface of the movable pressing rod (21) is sleeved inside the brush head (2); and the pressing block (22) is arranged outside the brush head (2).

6. The device for removing bacterial biofilm from infected wounds according to claim 1, characterized in that: The outer surface of the threaded rod (404) passes through the fixed screw sleeve (403), the rotary block (405) is arranged on the outside of the casing (401), and the fixed screw sleeve (403) is arranged in a ring along the outer surface of the casing (401).

7. The device for removing bacterial biofilm from infected wounds according to claim 1, characterized in that: The outer surface of the fixing plate (409) is sleeved and adapted to the inner surface of the connecting sleeve (407), and one end of the second spring (410) away from the fixing plate (409) is fixedly connected to the inner surface of the connecting sleeve (407).

8. The device for removing bacterial biofilm from infected wounds according to claim 1, characterized in that: The pressing plate (408) is arranged around the sterile gauze (3), and a side of the pressing plate (408) away from the connecting sleeve (407) is fixedly connected with an anti-slip protrusion (411), and the number of the anti-slip protrusions (411) is several.

9. A method for removing bacterial biofilm from infected wounds, characterized in that: The following steps are involved: S1: Holding the brush handle (1), inserting the rotating shaft (10) into the internal groove (12), until the hook (11) and the holder (14) cooperate with each other, so that the brush handle (1) and the brush head (2) are installed together; S2: Wrap the sterile gauze (3) on the brush head (2), and put the fixing device 4 on the outer surface of the sterile gauze (3), the second spring (410) is in a compressed state, and the elastic force of the second spring (410) causes the pressing plate (408) to be pressed against the outer surface of the sterile gauze (3), so that the sterile gauze (3) is fixed on the brush head (2); S3: adjusting the knob (9) so that the motor (7) starts and drives the rotating shaft (10) to rotate, and after the brush head (2) reaches a suitable rotation speed, the patient's wound can be scrubbed with the sterile gauze (3) on the brush head (2); S4: After use, the knob (9) is adjusted to turn off the motor (7), and the pressure block (22) is pressed to separate the holder (14) from the hook (11), thereby releasing the restriction of the hook (11), and moving the brush head (2) so that the rotating shaft (10) leaves the internal groove (12), so that the brush head (2) can be disassembled, and then the fixing device (4) is removed to release the fixation of the sterile gauze (3), so that the sterile gauze (3) can be removed from the brush head (2), and the brush head (2) is cleaned, and a new sterile gauze (3) is replaced when the device is used to clean the wound next time.

Citation Information

Patent Citations

  • Medical orthopedic hard nursing fixing device

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  • Electric toothbrush capable of cleaning oral cavity at multiple angles

    CN115363804A

  • Wound cleaning device and use method

    CN118022097A

  • Heating panel convenient to recopper pipe more

    CN207235345U

  • Infected wound bacterial biofilm removing device

    CN211301719U