A negative pressure closed drainage kit

Abstract

This utility model discloses a negative pressure closed drainage kit, including a negative pressure aspirator and a negative pressure drainage tube, as well as an integrated dressing assembly. The integrated dressing assembly is connected to the negative pressure aspirator via the negative pressure drainage tube. The integrated dressing assembly includes an internal drainage tube assembly and a medical dressing. The internal drainage tube assembly includes an external connector coaxially connected to the internal drainage tube, and the external connector is used for detachable connection with the negative pressure drainage tube. The medical dressing includes a tubular base dressing and multiple sheet dressings connected to the tubular base dressing. The tubular base dressing is nested and fixed to the outer periphery of the internal drainage tube. The external connector connects to the matching negative pressure drainage tube, and the internal drainage tube is directly fixed to the medical dressing, eliminating the need for suture fixation and improving operational efficiency. Depending on the size and shape of the wound, some sheet dressings can be partially or completely torn off for additional covering and packing. The core tubular base dressing and internal drainage tube are tightly connected and do not easily detach.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to a negative pressure closed drainage kit. Background Technology

[0002] Vacuum Sealing Drainage (VSD) is a medical technique that promotes wound healing and can be used to treat various types of wounds, including but not limited to: 1. Chronic wounds such as diabetic foot and venous ulcers; 2. Postoperative wounds such as postoperative infections and non-healing incisions; 3. Traumatic wounds such as large-area burns and post-traumatic wounds; 4. Skin grafts: the healing process after skin grafting.

[0003] In the clinical application of VSD (Vacuum-Assisted Surgery) technology to various wounds, the first step is to fill the wound with a polyethylene alcohol-hydrated alginate foam dressing from the VSD, ensuring complete adhesion to the cavity. Then, a negative pressure pump is connected via a drainage tube. However, several problems arise in actual use: the polyethylene alcohol-hydrated alginate foam dressing and the connected drainage tube are separate and independent. The foam dressing needs to be cut to size according to the wound. Sometimes, to ensure a proper fit between the dressing, wound, and drainage tube, the dressing and drainage tube opening need to be sutured before being inserted into the wound, which is time-consuming. Furthermore, the polyethylene alcohol-hydrated alginate foam dressing and drainage tube opening risk detachment due to self-suturing, leading to poor drainage and the need for re-fixation, requiring the use of a new VSD device and increasing the patient's financial burden. Utility Model Content

[0004] The purpose of this utility model is to at least partially solve one of the technical problems in related technologies. In view of this, a negative pressure closed drainage kit is provided, including a negative pressure aspirator and a negative pressure drainage tube, and also including an integrated dressing assembly. The integrated dressing assembly is connected to the negative pressure aspirator through the negative pressure drainage tube. The integrated dressing assembly includes an internal drainage tube assembly and a medical dressing. The internal drainage tube assembly includes an external connector and an internal drainage tube that are coaxially connected. The external connector is used for detachable connection with the negative pressure drainage tube. The medical dressing includes a tubular base dressing and multiple sheet dressings connected to the tubular base dressing. The tubular base dressing is nested and fixed to the outer periphery of the internal drainage tube.

[0005] Compared with the prior art, the technical solution of this utility model has the following advantages: Addressing the operational difficulties of negative pressure wound therapy, this invention innovatively designs a more integrated negative pressure wound therapy kit. The integrated dressing assembly includes an integrated built-in drainage tube assembly and medical dressing. The external connector can be connected to the matching negative pressure drainage tube. The built-in drainage tube is directly fixed to the medical dressing, eliminating the need for suture fixation and improving operational efficiency. The medical dressing contains multiple independent sheet dressings, which can be partially or completely torn off for supplementary covering and packing according to the size and shape of the wound. The core tubular base dressing and the built-in drainage tube are tightly connected and not easily detached.

[0006] According to one example of the present invention, each of the sheet dressings is attached to the outer periphery of the tubular base dressing, and the connection between the sheet dressing and the tubular base dressing has a first tear-away seam that facilitates tearing.

[0007] According to one example of the present invention, one sheet dressing is attached to a tubular base dressing, the sheet dressings are sequentially connected and there is a second tear seam between adjacent sheet dressings for easy tearing, and the sheet dressings are rolled up and wrapped around the tubular base dressing.

[0008] According to one example of the present invention, the wall of the built-in drainage tube is provided with a plurality of evenly distributed drainage holes.

[0009] According to one example of the present invention, the built-in drainage tube is a dual-channel tube; a built-in flushing tube is coaxially arranged inside the built-in drainage tube, and a flushing groove is provided on the tube wall of the built-in flushing tube.

[0010] According to one example of the present invention, a support plate is coaxially arranged between the external connector and the internal drainage tube, and multiple reinforcing plates are provided between the support plate and the outer wall of the external connector.

[0011] According to one example of this invention, the surface of the medical dressing is integrally formed with an interlaced elastic barb structure. Advantages: When packed, the barbs conform to the wound surface in the forward direction; when pulled by external force, they lock in the reverse direction, reducing the risk of detachment by 83% (actual measurement data); microchannels are formed between the barbs, enhancing the efficiency of exudate drainage.

[0012] According to one example of the present invention, the medical dressing is a polyethylene alcohol hydrated seaweed salt foam dressing.

[0013] According to one example of the present invention, a waste liquid tank connected in communication with a negative pressure suction device is also included.

[0014] According to one example of the present invention, it further includes a flushing pump and a storage tank, wherein the inlet of the flushing pump is connected to the storage tank and the outlet of the flushing pump is connected to a built-in flushing pipe.

[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a structural diagram of the first design example of the integrated dressing assembly of this utility model.

[0018] Figure 2 This is an embodiment of the present utility model. Figure 1 A partial half-section structural diagram.

[0019] Figure 3 yes Figure 2 Enlarged structural diagram of part A.

[0020] Figure 4 yes Figure 2 Enlarged structural diagram of part B.

[0021] Figure 5 This is a second design example structural diagram of the integrated dressing assembly of this utility model.

[0022] Figure 6 yes Figure 5 A half-section structural diagram.

[0023] Figure 7 yes Figure 5 The expanded state structure diagram.

[0024] Figure 8 This is a structural diagram of the negative pressure suction device, waste liquid tank, and storage tank of this utility model.

[0025] The attached figures are labeled as follows: 100, negative pressure suction device; 200, negative pressure drainage tube; 300, integrated dressing assembly; 310, built-in drainage tube assembly; 311, external connector; 312, built-in drainage tube; 313, drainage hole; 314, built-in flushing tube; 315, flushing slot; 316, support sheet; 317, reinforcing sheet; 320, medical dressing; 321, tubular base dressing; 322, sheet dressing; 323, first easy-tear seam; 324, second easy-tear seam; 400, waste liquid tank; 500, storage tank. Detailed Implementation

[0026] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model. Example

[0027] Please see Figure 1 , Figure 2 As shown, this utility model provides a negative pressure closed drainage kit, including a negative pressure aspirator 100 and a negative pressure drainage tube 200, and also includes an integrated dressing assembly 300. The integrated dressing assembly 300 is connected to the negative pressure aspirator 100 through the negative pressure drainage tube 200. The integrated dressing assembly 300 includes an internal drainage tube assembly 310 and a medical dressing 320. The internal drainage tube assembly 310 includes an external connector 311 and an internal drainage tube 312 that are coaxially connected. The external connector 311 is used for detachable connection with the negative pressure drainage tube 200. The medical dressing 320 includes a tubular base dressing 321 and multiple sheet dressings 322 connected to the tubular base dressing 321. The tubular base dressing 321 is nested and fixed to the outer periphery of the internal drainage tube 312.

[0028] In this embodiment, the integrated dressing assembly includes an integrated built-in drainage tube assembly 310 and a medical dressing 320. The external connector 311 can be connected to the matching negative pressure drainage tube 200. The built-in drainage tube 312 is directly fixed to the medical dressing 320, eliminating the need for suture fixation and improving operational efficiency. The medical dressing 320 contains multiple independent sheet dressings. Depending on the size and shape of the wound, portions of the sheet dressings 322 can be partially or completely torn off for supplementary covering and packing. The core tubular base dressing and the built-in drainage tube are tightly connected and do not easily detach. The medical dressing 320 is a wound dressing used to cover sores, wounds, or other damage. Medical dressings 320 include natural gauze, synthetic fiber dressings, polymer film dressings, foamed polymer dressings, hydrocolloid dressings, alginate dressings, etc. The external connector 311 is used for a fixed form that allows for detachable connection with the negative pressure drainage tube 200. It can be a threaded connection or a tight-fitting plug connection, etc.

[0029] Preferably, in this embodiment, the medical dressing 320 is a polyethylene alcohol hydrated alginate foam dressing, which has significant efficacy in the medical field. Its core function is to promote rapid wound healing by mimicking the structure of human skin, providing an ideal environment for wound tissue regeneration, and effectively inhibiting bacterial infection. Simultaneously, this dressing can also promote the proliferation of epithelial cells, creating suitable moisture and temperature conditions to accelerate cell growth. Furthermore, its alginate component can inhibit inflammatory responses, reduce inflammatory symptoms around the wound, and promote inflammation resolution.

[0030] Patient wounds, incisions, or stomas vary in shape, requiring appropriate packing to fit the wound morphology, especially for deep cavities. In this embodiment, the medical dressing 320 comprises a main tubular base dressing 321 and multiple supplementary sheet dressings 322. The tubular base dressing 321 can be placed in the center of the wound or used to fill the middle of cavities. Depending on the wound condition, the sheet dressings 322 can be quickly torn off and placed at the wound edge or in the filling gaps of cavities. As a first example, each sheet dressing 322 is connected to the outer periphery of the tubular base dressing 321, and the connection between the sheet dressing 322 and the tubular base dressing 321 has a first tear-off seam 323 for easy opening. As a second example, a sheet dressing 322 is attached to a tubular base dressing 321, the sheet dressings 322 are connected in sequence and there is a second tear-away seam 324 between adjacent sheet dressings 322, and the sheet dressings 322 are rolled up and wrapped around the tubular base dressing.

[0031] Preferably, the wall of the built-in drainage tube 312 is provided with a plurality of evenly distributed drainage holes 313. These drainage holes 313 are provided at equal intervals along the axial and circumferential directions of the built-in drainage tube 312, which facilitates rapid aspiration of fluid from the wound at multiple points.

[0032] According to one example of this utility model, the built-in drainage tube 312 is a dual-channel tube; a built-in flushing tube 314 is coaxially arranged inside the built-in drainage tube 312, and a flushing groove 315 is provided on the tube wall of the built-in flushing tube 314. In other feasible designs, the built-in flushing tubes 314 can also be arranged side by side on the side of the built-in drainage tube 312, with the negative pressure drainage channel used to aspirate fluid accumulated at the wound site, and the flushing channel used to connect to external disinfectant or anti-inflammatory solutions to clean and disinfect the wound site.

[0033] As one of the improved designs, a support plate 316 is coaxially arranged between the external connector 311 and the internal drainage tube 312, and multiple reinforcing plates 317 are provided between the support plate 316 and the outer wall of the external connector 311. The reinforcing plates 317 serve as anti-torsion reinforcing ribs, which can prevent negative pressure failure caused by bending at the bend of the drainage tube.

[0034] As another improved design, the surface of the medical dressing 320 is integrally molded with a staggered, elastic barb structure. This elastic barb structure is integrally molded with the same material as the dressing. When packed, the barbs conform to the wound surface in the forward direction. In case of accidental pulling by external force, it has a certain reverse anti-pull-out effect, and the barbs form microchannels, which can enhance the drainage efficiency of exudate.

[0035] In other improved designs, as a complement to the drainage kit, the kit may also include a waste fluid tank 400 connected to a negative pressure suction device for storing exudate aspirated from the patient's wound. As a supplementary design, the kit may also include an irrigation pump and a reservoir 500, integrated into a compact irrigation and suction device. The inlet of the irrigation pump is connected to the reservoir 500, and the outlet of the irrigation pump is connected to the aforementioned built-in irrigation tube, used to pump irrigation, disinfection, or anti-inflammatory solutions to the wound as needed, according to medical orders, which are then extracted using the negative pressure suction device.

[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0037] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0038] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

[0039] For those skilled in the art, various changes and modifications will undoubtedly be apparent after reading the above description. Therefore, the appended claims should be considered as covering all changes and modifications that encompass the true intent and scope of this utility model. Any and all equivalent scope and content within the scope of the claims should be considered as still falling within the intent and scope of this utility model.

Claims

1. A negative pressure closed drainage kit, comprising a negative pressure aspirator (100) and a negative pressure drainage tube (200), characterized in that: It also includes an integrated dressing assembly (300), which is connected to a negative pressure suction device (100) via a negative pressure drainage tube (200); The integrated dressing assembly (300) includes an internal drainage tube assembly (310) and a medical dressing (320). The built-in drainage tube assembly (310) includes an external connector (311) and a built-in drainage tube (312) that are coaxially connected. The external connector (311) is used to detachably connect to the negative pressure drainage tube (200). The medical dressing (320) includes a tubular base dressing (321) and multiple sheet dressings (322) connected to the tubular base dressing (321), wherein the tubular base dressing (321) is nested and attached to the periphery of the internal drainage tube (312).

2. The negative pressure closed drainage kit according to claim 1, characterized in that: Each of the sheet dressings (322) is attached to the outer periphery of the tubular base dressing (321), and the connection between the sheet dressing (322) and the tubular base dressing (321) has a first tear-away seam (323) that is easy to tear open.

3. The negative pressure closed drainage kit according to claim 1, characterized in that: One of the sheet dressings (322) is attached to the tubular base dressing (321), the sheet dressings (322) are connected in sequence and there is a second tear seam (324) between adjacent sheet dressings (322) for easy tearing, and the sheet dressings (322) are rolled up and wrapped around the tubular base dressing (321).

4. The negative pressure closed drainage kit according to claim 1, characterized in that: The inner drainage tube (312) has multiple evenly distributed drainage holes (313) on its tube wall.

5. A negative pressure closed drainage kit according to claim 1, characterized in that: The built-in drainage tube (312) is a dual-channel tube; the built-in drainage tube (312) is coaxially provided with a built-in flushing tube (314), and the wall of the built-in flushing tube (314) is provided with a flushing groove (315).

6. The negative pressure closed drainage kit according to claim 1, characterized in that: A support plate (316) is coaxially arranged between the external connector (311) and the internal drainage tube (312), and a plurality of reinforcing plates (317) are provided between the support plate (316) and the outer wall of the external connector (311).

7. The negative pressure closed drainage kit according to claim 1, characterized in that: The surface of the medical dressing (320) is integrally formed with an interlaced elastic barb structure.

8. A negative pressure closed drainage kit according to claim 1, characterized in that: The medical dressing (320) is a polyethylene alcohol hydrated seaweed salt foam dressing.

9. A negative pressure closed drainage kit according to claim 1, characterized in that: It also includes a waste liquid tank (400) connected to a negative pressure suction device (100).

10. A negative pressure closed drainage kit according to claim 5, characterized in that: It also includes a flushing pump and a storage tank (500), the inlet of which is connected to the storage tank (500) and the outlet of which is connected to the built-in flushing pipe (314).

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