A leakproof device for negative pressure wound therapy and methods of use thereof

Abstract

The application belongs to the technical field of medical apparatus and discloses a leakage-proof device for negative pressure closed drainage technology and a use method thereof. The leakage-proof device comprises a bendable goose neck pipe, a vertical assembly is arranged at the bottom of the goose neck pipe, a connecting assembly is arranged on the inner side of the pipe body of the goose neck pipe, a first clamping assembly or a second clamping assembly is detachably arranged on the other side of the connecting assembly away from the goose neck pipe, and the leakage-proof device further comprises a straightening assembly for correcting the goose neck pipe. The goose neck pipe with arbitrary shape is matched with two types of detachable clamping assemblies, which can be freely selected, can be adapted to various wounds such as circular, rectangular and neck vertical wounds, can make the elastic film uniformly tight, can reduce the film edge lifting, wrinkle and air leakage, can block the exudate and drainage area on one side through suture, can improve the sealing stability during negative pressure adsorption, and one set of clamping assembly can be independently and quickly detached, so that the frame can be flexibly disassembled during suture, and the operation process in the operation is simplified.

Description

Technical Field

[0001] This invention belongs to the field of medical device technology, specifically a leak-proof device for negative pressure closed drainage technology and its usage method. Background Technology

[0002] Vacuum-assisted closure (VSD) technology has been widely used in modern trauma surgery, burn surgery, and chronic wound repair. It involves filling the wound with medical foam material, sealing it with a semi-permeable medical membrane, and then connecting it to a negative pressure source to create continuous or intermittent negative pressure. This achieves the purpose of removing exudate, improving local microcirculation, and promoting granulation tissue growth.

[0003] However, in clinical practice, existing negative pressure drainage membranes often fail due to excessive exudate near the wound or drainage opening, changes in patient position, or local joint movement. This leads to the failure of the adhesive at the edges of the semi-permeable membrane, causing it to curl up and resulting in system air leakage, making it impossible to maintain negative pressure and causing drainage failure. In addition, when dealing with irregularly shaped wounds, such as long rectangular, oval, or large irregular wounds, ordinary single-layer films are difficult to achieve uniform tension and in-situ high-strength fixation. Summary of the Invention

[0004] The purpose of this invention is to provide a leak-proof device and its usage method for negative pressure closed drainage technology, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a leak-proof device for negative pressure closed drainage technology, comprising a bendable and shapeable gooseneck tube, a vertical component provided at the bottom of the gooseneck tube, a connecting component assembled on the inner side of the gooseneck tube, a first clamping component or a second clamping component being quickly installed on the connecting component away from the gooseneck tube, and the leak-proof device further comprising a straightening component for correcting the gooseneck tube. The connecting component includes a second clamp, which can be flexibly engaged at any position inside the gooseneck tube. A U-shaped rod is fixedly connected to the outer edge of the second clamp, and an insert is movably hinged to the other side of the U-shaped rod. The first clamping assembly includes a trapezoidal frame. A first quick-release groove adapted to the insert is provided in the middle of the outer side wall of the trapezoidal frame. An elongated groove is provided along the inner wall of the trapezoidal frame. A clamping plate is fitted inside the elongated groove. Multiple protruding rods are fixed on the surface of the clamping plate. A sliding shell is slidably connected to the outer side of the trapezoidal frame.

[0006] Preferably, the interior of the sliding shell is wedge-shaped. When the sliding shell is slidably installed on the outside of the two clamping plates, the two clamping plates will be squeezed until they gradually tighten, clamping and locking the elastic film.

[0007] Preferably, the vertical component includes a base, the top of which is threaded with two locking caps. Two connecting rods are respectively inserted into the corresponding locking caps. Rotating the locking caps can lock and fix the extension height of the connecting rods. The other end of each of the two connecting rods away from the locking caps is fixedly installed with a first clamp. The two first clamps together hold the gooseneck tube, keeping the gooseneck tube in a vertical position to adapt to the negative pressure leak prevention operation of the neck wound.

[0008] Preferably, the second clamping assembly includes a rectangular block, the outer center of which is provided with a second quick-release groove for quick release with the insert, and an elastic band is fixedly connected to the inner side of the rectangular block, the tail end of which is movably connected to a clip for clamping the edge of the elastic coating.

[0009] Preferably, the straightening assembly includes a round rod, a handle is fixedly installed at the top of the round rod, a base plate is fixedly installed at the bottom of the round rod, a movable ring is movably sleeved on the outer edge of the middle part of the round rod, four connecting rings are circumferentially hinged to the outer circumference of the movable ring, and bent rods are symmetrically hinged to the bottom of the four connecting rings in a cross shape. The bottom ends of the four bent rods are all fixedly connected to a third clamp for clamping the gooseneck tube.

[0010] Preferably, a spring is fitted between the movable ring and the base plate, and the two ends of the spring are fixedly connected to the movable ring and the base plate respectively. The movable ring can slide back and forth along the axial direction of the round rod.

[0011] Preferably, after the equipment is used up, the gooseneck tube is bent into an approximately circular shape, four third clamps are fitted onto its outer edge, the gooseneck tube is pressed against the supporting plane, the movable ring is pushed down and the spring is compressed, so that the movable ring slides down along the round rod, driving the four bent rods to unfold outwards synchronously, and the gooseneck tube is evenly stretched by the third clamps, so that the gooseneck tube is corrected into a perfect circle for the next use.

[0012] As a further improvement to the above technical solution, the following steps are included: S1. Preoperative preparation: Assess the wound and adjacent exudate or drainage openings, cut an elastic dressing to fit the shape, select one or more first clamping components or second clamping components as needed, and determine the usage posture of the gooseneck tube. For flat wounds, use it by bending; for neck wounds, use it vertically with the vertical component.

[0013] S2. Clamping and fixing: The first clamping component uses a wedge-shaped sliding shell to press and lock the edge of the film-coating plate; the second clamping component clamps the film-coating with a clamp; each clamping component and the connecting component are quickly and easily connected and fixed at the corresponding position of the gooseneck tube.

[0014] S3. Adjusting and positioning: Adjust the bending shape of the gooseneck tube or use the vertical component to maintain a vertical posture so that the covering is evenly stretched; move the device above the wound so that the unsutured side of the covering is aligned with the exudate wound or drainage port.

[0015] S4. Unilateral suture: Suture only the side of the membrane away from the seepage or drainage outlet; if the suture is obstructed by clamps, quickly remove the corresponding clamping components, and remove all frame components after the suture is completed.

[0016] S5. Storage and Straightening: Clean and remove all components, and then store the gooseneck tube after stretching and straightening it into a perfect circle using the straightening components.

[0017] The beneficial effects of this invention are as follows: 1. This invention uses a gooseneck tube that can be arbitrarily shaped and paired with two types of freely selectable quick-release clamping components, which can adapt to various wounds such as round, rectangular, and vertical neck wounds. It allows the elastic dressing to be stretched evenly, reducing film lifting, wrinkling, and air leakage. The dressing can be sutured on one side to block exudate and drainage areas, thereby improving the sealing stability during negative pressure adsorption. Furthermore, each set of clamping components can be disassembled independently and quickly, and the frame can be flexibly disassembled during suturing, simplifying the intraoperative operation process.

[0018] 2. This invention, by incorporating a straightening component, relies on four symmetrically bent rods linked by springs to provide synchronous external support. This applies uniform circumferential tension to the bent and deformed gooseneck tube, straightening and correcting it. This prevents irreversible plastic deformation caused by long-term bending of the gooseneck tube, ensuring stable shaping effect of the gooseneck tube each time it is used, reducing consumable consumption, increasing the number of times the instrument can be reused, and saving clinical usage costs. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 For the present invention Figure 1 Enlarged schematic diagram of the structure at point A in the middle; Figure 3 This is a schematic diagram of the structure of the present invention with the straightening component removed; Figure 4 This is a schematic diagram of the connection component structure of the present invention; Figure 5 This is a schematic diagram of the structure of the first clamping component of the present invention; Figure 6 This is a cross-sectional view of the first clamping component structure of the present invention; Figure 7 This is a schematic diagram of the structure of the second clamping component of the present invention; Figure 8 This is a schematic diagram of the straightening component structure of the present invention.

[0020] In the diagram: 1. Gooseneck tube; 2. Vertical assembly; 3. Connecting assembly; 4. First clamping assembly; 5. Second clamping assembly; 6. Straightening assembly; 21. Base; 22. Locking cover; 23. Connecting rod; 24. First clamp; 31. Second clamp; 32. U-shaped rod; 33. Insert; 41. Trapezoidal frame; 42. First quick-release slot; 43. Long slot; 44. Protruding rod; 45. Clamping plate; 46. Sliding shell; 51. Rectangular block; 52. Second quick-release slot; 53. Elastic band; 54. Clamp; 61. Round rod; 62. Handle; 63. Base plate; 64. Movable ring; 65. Connecting ring; 66. Bent rod; 67. Third clamp; 68. Spring. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] like Figures 1 to 8 As shown, this embodiment of the invention provides a leak-proof device for negative pressure closed drainage technology, including a bendable and shapeable gooseneck tube 1, a vertical component 2 is provided at the bottom of the gooseneck tube 1, a connecting component 3 is assembled on the inner side of the tube body of the gooseneck tube 1, and a first clamping component 4 or a second clamping component 5 is quickly installed on the other side of the connecting component 3 away from the gooseneck tube 1. The leak-proof device also includes a straightening component 6 for straightening the gooseneck tube 1. The connecting component 3 includes a second clamp 31, which can be flexibly clamped at any position inside the gooseneck tube 1. A U-shaped rod 32 is fixedly connected to the outer edge of the second clamp 31, and an insert 33 is movably hinged to the other side of the U-shaped rod 32. The first clamping assembly 4 includes a trapezoidal frame 41. A first quick-release groove 42 adapted to the insert 33 is provided in the middle of the outer side wall of the trapezoidal frame 41. An elongated groove 43 is provided along the inner wall of the trapezoidal frame 41. A clamping plate 45 is matched and locked inside the elongated groove 43. A plurality of protruding rods 44 are fixed on the surface of the clamping plate 45. A sliding shell 46 is slidably connected to the outer side of the trapezoidal frame 41. The interior of the sliding shell 46 is wedge-shaped. When the sliding shell 46 is slidably installed on the outside of the two clamping plates 45, the two clamping plates 45 will be squeezed until they gradually tighten, clamping and locking the elastic film.

[0023] During operation, the sliding shell 46 is pushed to slide inward along the trapezoidal frame 41. The wedge-shaped inner cavity squeezes the two clamping plates 45 to close towards each other. The protruding rods 44 on the surface of the clamping plates 45 increase the frictional biting force, firmly clamping the edge of the film. The clamping force increases synchronously with the sliding stroke, and the locking is stable and reliable. By engaging the quick-release slot of the insert 33 with the connecting component 3, it can be independently and quickly disassembled and assembled, and then fixed to any position of the gooseneck tube 1 by the second clamp 31, realizing modular and flexible combination.

[0024] Furthermore, the vertical component 2 includes a base 21, the top of which is threaded with two locking caps 22. Two connecting rods 23 are respectively inserted into the corresponding locking caps 22. Rotating the locking caps 22 can lock and fix the extension height of the connecting rods 23. The other ends of the two connecting rods 23 away from the locking caps 22 are fixedly installed with first clamps 24. The two first clamps 24 together hold the gooseneck tube 1, keeping the gooseneck tube 1 in a vertical position to adapt to the negative pressure leak prevention operation of the neck wound.

[0025] During operation, the appropriate device is selected based on the location, outline, and size of the wound, as well as the distribution of adjacent exudative wounds or drainage openings. For vertical wounds such as those on the neck, the gooseneck tube 1 is fixed in a vertical position using the vertical component 2. The rotating locking cap 22 adjusts the extension height of the connecting rod 23 to accommodate the coverage needs of vertical wounds of different heights. After positioning, the unsutured side of the covering is aligned with the adjacent exudative wound or drainage opening to reserve a channel for subsequent negative pressure drainage.

[0026] Furthermore, the second clamping assembly 5 includes a rectangular block 51, with a second quick-release groove 52 for quick release with the insert 33 in the middle of the outer side of the rectangular block 51, and an elastic band 53 fixedly connected to the inner side of the rectangular block 51, with the tail end of the elastic band 53 movably connected to a clip 54 for clamping the edge of the elastic coating.

[0027] During operation, the elastic band 53 and the clip 54 are used to achieve flexible clamping, which can adapt to the small deformation of the coating edge.

[0028] Furthermore, the straightening assembly 6 includes a round rod 61, with a handle 62 fixedly installed at the top end of the round rod 61 and a base plate 63 fixedly installed at the bottom end of the round rod 61. A movable ring 64 is movably sleeved on the outer edge of the middle part of the round rod 61. Four connecting rings 65 are annularly hinged to the outer circumference of the movable ring 64. Bent rods 66 are symmetrically hinged to the bottom of the four connecting rings 65. The bottom ends of the four bent rods 66 are all fixedly connected to a third clamp 67 for clamping the gooseneck tube 1. A spring 68 is assembled between the movable ring 64 and the base plate 63. The two ends of the spring 68 are fixedly connected to the movable ring 64 and the base plate 63 respectively. The movable ring 64 can slide back and forth along the axial direction of the round rod 61. After the equipment is used, bend the gooseneck tube 1 into an approximately circular shape, put the four third clamps 67 on its outer edge, press the gooseneck tube 1 against the supporting plane, push the movable ring 64 downward and compress the spring 68, so that the movable ring 64 slides down along the round rod 61, driving the four bent rods 66 to unfold outward in sync. The third clamps 67 evenly stretch the gooseneck tube 1, and correct the gooseneck tube 1 into a perfect circle for the next use.

[0029] Includes the following steps: S1. Preoperative preparation: Assess the wound and adjacent exudate or drainage openings, cut an elastic dressing to fit the shape, select one or more first clamping components 4 or second clamping components 5 as needed, and determine the usage posture of the gooseneck tube 1. It is used in a bent position for flat wounds and in a vertical position with the vertical component 2 for neck wounds.

[0030] S2, clamping and fixing: the first clamping component 4 presses the clamping plate 45 to lock the edge of the film by the wedge-shaped sliding shell 46; the second clamping component 5 clamps the film with the clamp 54; each clamping component and the connecting component 3 are quickly connected and fixed at the corresponding position of the gooseneck tube 1.

[0031] S3. Adjusting and positioning: Adjust the bending shape of the gooseneck tube 1 or use it in conjunction with the vertical component 2 to maintain a vertical posture, so that the covering film is evenly stretched; move the device above the wound so that the unsutured side of the covering film is aligned with the exudate wound or drainage port.

[0032] S4. Unilateral suture: Suture only the side of the membrane away from the seepage or drainage outlet; if the suture is obstructed by clamps, quickly remove the corresponding clamping components, and remove all frame components after the suture is completed.

[0033] S5. Storage and straightening: Clean and remove all components, and then store the gooseneck tube 1 after stretching and straightening it into a perfect circle using the straightening component 6.

[0034] Working principle: When using this device, the appropriate model should be selected before the operation based on the location, outline size and distribution of adjacent exudative wounds or drainage openings. For planar wounds such as the trunk and limbs, a folded gooseneck tube 1 is used as a support frame; for vertical wounds such as the neck, a vertical component 2 is used to fix the gooseneck tube 1 in a vertical position.

[0035] At the same time, a rectangular or near-circular elastic dressing is cut according to the shape of the wound. Combining the dressing side length and tension requirements, one or more first clamping components 4 and second clamping components 5 are selected, and a unilateral suture layout is preset.

[0036] The sliding shell 46 is pushed to slide inward along the trapezoidal frame 41. The wedge-shaped inner cavity squeezes the two clamping plates 45 to close towards each other. The protruding rods 44 on the surface of the clamping plates 45 increase the frictional biting force, firmly clamping the edge of the film. The clamping force increases synchronously with the sliding stroke, and the locking is stable and reliable.

[0037] If the second clamping component 5 is selected, flexible clamping is achieved through the elastic band 53 and the clip 54, which can adapt to the slight deformation of the coating edge. Both types of clamping components are connected to the quick-release slot of the connecting component 3 through the insert 33, which can be independently and quickly disassembled and assembled. They can then be fixed to any position of the gooseneck tube 1 by the second clamp 31, realizing modular and flexible combination.

[0038] Relying on the characteristic that the gooseneck tube 1 can be bent at will and shaped independently, the curvature of the frame and the spacing of each clamping component are adjusted so that the elastic film is subjected to a uniform outward pulling force in the circumference, eliminating the wrinkling and curling problems caused by uneven tension in traditional manual film application.

[0039] When used with the vertical component 2, the rotating locking cap 22 can adjust the extension height of the connecting rod 23 to adapt to the coverage needs of vertical wounds of different heights. After positioning, align the unsutured side of the dressing with the adjacent exudate wound or drainage port to reserve a channel for subsequent negative pressure drainage.

[0040] Subsequently, the side of the dressing closest to the exudate or drainage opening is sutured and fixed. When the suture needle reaches the area obstructed by the clamping components, the corresponding insert 33 can be individually removed to dismantle the clamping components without disassembling the overall frame, achieving unobstructed suturing while maintaining the tension of the dressing. After the negative pressure is activated, the evenly taut dressing adheres tightly to the skin around the wound under the action of negative pressure adsorption, achieving a full circumferential seal through the dual action of membrane tension and negative pressure adsorption. At the same time, fluid near the exudate or drainage opening can be blocked by the elastic membrane to prevent the negative pressure adsorption from failing.

[0041] After use, remove each component from the gooseneck tube 1 and bend it into an approximately circular shape. Place the four third clamps 67 on its outer edge, and press the gooseneck tube 1 against the supporting plane. Then, push the movable ring 64 downward to slide along the round rod 61. While compressing the spring 68, the four bent rods 66 will be driven to unfold outward synchronously through the annularly distributed connecting rings 65. The end third clamps 67 apply uniform circumferential tension to the gooseneck tube 1. After the bent and deformed gooseneck tube 1 is corrected into a perfect circle, it is put away to ensure the shaping accuracy of the device for repeated use.

[0042] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention 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, or similar improvements made within the theoretical and principle scope of the present invention should be included within the protection scope of the present invention.

Claims

1. A leak-proof device for negative pressure closed drainage technology, comprising a bendable and shaped gooseneck tube (1), characterized in that: The bottom of the gooseneck tube (1) is provided with a vertical component (2), and the inner side of the tube body of the gooseneck tube (1) is equipped with a connecting component (3). The connecting component (3) is quickly installed with a first clamping component (4) or a second clamping component (5) on the other side away from the gooseneck tube (1). The leak-proof device also includes a straightening component (6) for straightening the gooseneck tube (1). The connecting component (3) includes a second clamp (31), which can be flexibly clamped at any position inside the gooseneck tube (1). A U-shaped rod (32) is fixedly connected to the outer edge of the second clamp (31), and an insert (33) is movably hinged to the other side of the U-shaped rod (32). The first clamping assembly (4) includes a trapezoidal frame (41). The middle of the outer side wall of the trapezoidal frame (41) is provided with a first quick-release groove (42) that is adapted to the insert (33) for quick release. The inner side of the trapezoidal frame (41) is provided with a long groove (43). The inside of the long groove (43) is fitted with a clamping plate (45). The surface of the clamping plate (45) is fixed with a plurality of protruding rods (44). The outer side of the trapezoidal frame (41) is slidably connected with a sliding shell (46).

2. The leak-proof device for negative pressure closed drainage technology according to claim 1, characterized in that: The interior of the sliding shell (46) is wedge-shaped. When the sliding shell (46) is slidably installed on the outside of the two clamping plates (45), the two clamping plates (45) will be squeezed until they gradually tighten, thus clamping and locking the elastic film.

3. The leak-proof device for negative pressure closed drainage technology according to claim 1, characterized in that: The vertical component (2) includes a base (21), the top of which is threaded with two locking caps (22). Two connecting rods (23) are respectively inserted into the corresponding locking caps (22). Rotating the locking caps (22) can lock and fix the extension height of the connecting rods (23). The other ends of the two connecting rods (23) away from the locking caps (22) are fixedly installed with first clamps (24). The two first clamps (24) together clamp the gooseneck tube (1) to keep the gooseneck tube (1) in a vertical position to adapt to the negative pressure leak prevention operation of the neck wound.

4. A leak-proof device for negative pressure closed drainage technology according to claim 1, characterized in that: The second clamping assembly (5) includes a rectangular block (51), and a second quick-release groove (52) for quick release with the insert (33) is provided in the middle of the outer side of the rectangular block (51). An elastic band (53) is fixedly connected to the inner side of the rectangular block (51), and the tail end of the elastic band (53) is movably connected to a clip (54) for clamping the edge of the elastic film.

5. A leak-proof device for negative pressure closed drainage technology according to claim 1, characterized in that: The straightening assembly (6) includes a round rod (61), a handle (62) is fixedly installed at the top of the round rod (61), a base plate (63) is fixedly installed at the bottom of the round rod (61), a movable ring (64) is movably sleeved on the outer edge of the middle part of the round rod (61), four connecting rings (65) are circumferentially hinged on the outer circumference of the movable ring (64), and bent rods (66) are symmetrically hinged below the four connecting rings (65). The bottom ends of the four bent rods (66) are all fixedly connected with a third clamp (67) for clamping the gooseneck tube (1).

6. A leak-proof device for negative pressure closed drainage technology according to claim 5, characterized in that: A spring (68) is assembled between the movable ring (64) and the base plate (63). The two ends of the spring (68) are fixedly connected to the movable ring (64) and the base plate (63) respectively. The movable ring (64) can slide back and forth along the axial direction of the round rod (61).

7. A leak-proof device for negative pressure closed drainage technology according to claim 6, characterized in that: After the equipment is used up, bend the gooseneck tube (1) into an approximately circular shape, put the four third clamps (67) on its outer edge, press the gooseneck tube (1) against the support plane, push the movable ring (64) down and compress the spring (68), so that the movable ring (64) slides down along the round rod (61), driving the four bent rods (66) to unfold outwards in sync, and stretch the gooseneck tube (1) evenly through the third clamps (67), so that the gooseneck tube (1) is corrected into a perfect circle for the next use.

8. A leak-proof method for negative pressure closed drainage, applied to any one of the leak-proof devices for negative pressure closed drainage technology according to claims 1-7, characterized in that, Includes the following steps: S1. Preoperative preparation: Assess the wound and the condition of adjacent exudate or drainage openings, cut an elastic dressing to fit the shape, select one or more first clamping components (4) or second clamping components (5) as needed, and determine the usage posture of the gooseneck tube (1). It is used in a bent position on a flat wound and in a vertical position on a neck wound with the vertical component (2). S2, clamping and fixing: the first clamping component (4) presses the clamping plate (45) through the wedge-shaped sliding shell (46) to lock the edge of the film; the second clamping component (5) clamps the film with the clamp (54); each clamping component and the connecting component (3) are quickly connected and fixed at the corresponding position of the gooseneck tube (1); S3. Adjusting position: Adjust the bending shape of the gooseneck tube (1) or use the vertical component (2) to maintain the vertical posture so that the covering film is evenly stretched; move the device above the wound so that the unsutured side of the covering film is aligned with the exudate wound or the drain. S4, Unilateral suture: Suture only the side of the membrane away from the exudate or drainage opening; if the suture is obstructed by clamps, quickly remove the corresponding clamping components, and remove all frame components after the suture is completed; S5. Storage and straightening: Clean and remove all components, stretch and straighten the gooseneck tube (1) into a perfect circle using the straightening component (6) and then store it.

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