Percolate collecting and sampling device

Abstract

The utility model provides a percolate collecting device which is used for solving the problem that an existing collecting device cannot collect fresh percolate at different time points. According to the percolate collecting and sampling device, a main body of the sampling device is a shell with the sealed periphery and the hollow interior, the interior of the shell is divided into a first cavity and a second cavity in a left-right mode through a cavity partition plate, a liquid inlet is formed in the upper surface of the first cavity, and an upper set of baffle and a lower set of baffle are arranged on the inner wall of the first cavity in an inward protruding mode; a floating plate is arranged between the upper group of baffles and the lower group of baffles, concave holes which are the same as the baffles in shape and position and smaller than the baffles in size are formed in the floating plate, the interior of the second cavity is divided into three cavities by an upper partition plate and a lower partition plate, and sampling ports are formed in the lower sides of the upper cavity and the lower cavity respectively. And the first cavity is communicated with the second cavity through a one-way valve.

Description

Technical Field

[0001] This utility model relates to the field of wound drainage instruments, specifically to an exudate collection and sampling device. Background Technology

[0002] Negative pressure wound therapy (NPWT) effectively promotes the drainage of wound exudate, including blood, tissue fluid, and pus. This technique promptly removes harmful substances from the wound, reducing the risk of infection and creating a relatively clean healing environment. Simultaneously, NPWT promotes local blood circulation, accelerates tissue repair and regeneration, and contributes to wound healing and the recovery of tissue function. Clinically, NPWT is widely used in the treatment of various traumas, burns, and surgical incisions, with particularly significant effects on complex and chronic wounds, making it an indispensable and important technique in modern wound care.

[0003] Patent CN218515957U discloses an improved VSD negative pressure drainage device, which achieves simultaneous negative pressure drainage and wound exudate collection. This utility model is an improvement and optimization of the collection and sampling device based on that patent. The reason for the improvement is that exudate contains various information about the wound condition; by detecting fresh exudate at a specific time point, it is possible to determine whether the wound has worsened or is improving. The aforementioned patent can only collect fresh exudate from one point in time; subsequent exudate mixes together, making it impossible to obtain fresh exudate from another point in time. Therefore, it is necessary to design a dedicated sampling and collection device to obtain fresh exudate from several different time points. Utility Model Content

[0004] This invention provides an exudate collection device to solve the problem that existing collection devices cannot collect fresh exudate at different time points.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An exudate collection and sampling device is disclosed. The main body of the sampling device is a hollow shell with sealed sides. The shell is divided into a first cavity and a second cavity by a cavity partition plate. The upper surface of the first cavity has a liquid inlet. The inner wall of the first cavity has two sets of upper and lower baffles protruding inward. There is a float plate between the upper and lower sets of baffles. The float plate has a concave hole with the same shape and position as the baffle but smaller in size. The second cavity is divided into three cavities by the upper and lower partition plates. Sampling ports are respectively set on the lower side of the upper and lower cavities. The first cavity and the second cavity are connected by a one-way valve.

[0007] Furthermore, the baffle is a rectangular block, and a silicone sealing layer is fixed to the lower surface of the upper set of baffles and the upper surface of the lower set of baffles, respectively.

[0008] Furthermore, the outer ring of the float plate is connected to a skirt, which forms a sealed space between the baffle and the inner wall of the first cavity.

[0009] Furthermore, the three cavities in the second cavity are, from top to bottom, right cavity one, right cavity two, and right cavity three.

[0010] Furthermore, a first one-way valve is provided on the cavity partition plate on the lower side of the right cavity, and a second one-way valve and a third one-way valve are respectively provided on the cavity partition plates on the upper and lower sides of the right third cavity.

[0011] Furthermore, the first and second check valves control the liquid to flow from left to right, and the third check valve controls the liquid to flow from right to left.

[0012] Furthermore, the opening pressure of the third check valve is the pressure of the liquid in the right three chambers.

[0013] Furthermore, the volume of the right third cavity is greater than the volume of the space formed by the lower set of baffles and the first cavity.

[0014] Furthermore, the third one-way valve is positioned above the upper surface of the float when it is in its lowest position.

[0015] Furthermore, the first one-way valve is positioned above the upper surface of the upper set of baffles.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The exudate collection and sampling device of this invention is completely sealed, suitable for use in negative pressure drainage systems, and can collect fresh exudate from 2-4 time points for analysis.

[0018] This invention constructs two time periods through the combination of a float and a baffle, during which fresh exudate can be collected.

[0019] The right second cavity of this utility model is a hollow cavity, which shortens the time interval and makes it meet the requirements of clinical sampling time.

[0020] This invention controls the flow of liquid in different directions by using a one-way valve, thereby enabling the propulsion of the float and the construction of time periods. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of an exudate collection and sampling device according to an embodiment of the present invention;

[0022] Figure 2 This is a cross-sectional view from the first perspective of an embodiment of the present invention, showing an exudate collection and sampling device.

[0023] Figure 3 This is a cross-sectional view from a second perspective of an exudate collection and sampling device according to an embodiment of this utility model;

[0024] Figure 4 This is a schematic diagram of the structure of the float plate in an exudate collection and sampling device according to an embodiment of this utility model;

[0025] Figure 5 This is a schematic diagram of the first state of an exudate collection and sampling device according to an embodiment of the present invention;

[0026] Figure 6 This is a schematic diagram of the second state of an exudate collection and sampling device according to an embodiment of the present invention;

[0027] Figure 7 This is a schematic diagram of the third state of an exudate collection and sampling device according to an embodiment of the present invention;

[0028] Figure 8 This is a schematic diagram of the fourth state of an exudate collection and sampling device according to an embodiment of this utility model.

[0029] Among them, 10-shell, 11-liquid inlet, 12-first sampling port, 13-second sampling port, 100-first cavity, 110-upper left cavity, 120-lower left cavity, 131-first baffle, 132-second baffle, 141-third baffle, 142-fourth baffle, 200-second cavity, 210-right first cavity, 220-right second cavity, 230-right third cavity, 240-first partition plate, 250-second partition plate, 300-cavity partition plate, 310-first one-way valve, 320-second one-way valve, 330-third one-way valve, 400-float plate, 410-skirt, 420-recessed hole. Detailed Implementation

[0030] The embodiments of the utility model will be described in detail below with reference to the accompanying drawings. It should be noted that the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0031] like Figure 1 As shown, the main body of the collection and sampling device is a shell 10 that is sealed on all sides and hollow inside. There is a liquid inlet 11 on the upper surface of the shell 10. The liquid inlet 11 is connected to a negative pressure drainage machine, and the drained liquid flows into the shell 10 through the liquid inlet 11.

[0032] like Figure 2 and Figure 3As shown, the housing 10 is divided into a first cavity 100 on the left and a second cavity 200 on the right by a cavity partition plate 300. The liquid inlet 11 is located above the first cavity 100. The first cavity 100 and the second cavity 200 have the same volume, but can be adjusted to different volumes according to actual needs.

[0033] The first cavity 100 contains two sets of baffles, upper and lower. The baffles in the same set are the same size and are on the same plane. The shape of the baffles is rectangular and they protrude from the inner surface of the shell 10. From the cross-sectional view, the baffles on one side of the upper set of baffles are the first baffle 131 and the second baffle 132, and the baffles on one side of the upper set of baffles are the third baffle 141 and the fourth baffle 142.

[0034] There is a floating plate 400 between the upper set of baffles and the lower set of baffles, such as Figure 4 As shown, the shape of the float plate 400 is similar to the cross-sectional shape of the first cavity 100, but slightly smaller in size. This allows the float plate 400 to move between the two sets of baffles under buoyancy. Importantly, the float plate 400 is connected to four sides with silicone skirts 410, which seal the space between the float plate 400 and the inner wall of the first cavity 100. Furthermore, the float plate 400 has four recessed holes 420, the shape of which is the same as that of the baffles but smaller in size. The center of the recessed hole 420 coincides with the center of the baffle, ensuring that the baffle completely covers the recessed hole 420 when it comes into contact with it. The float plate 400 divides the first cavity 100 into two cavities: the upper left cavity 110 and the lower left cavity 120.

[0035] Of course, in order to achieve a better sealing effect, a silicone layer is set on the lower surface of the upper set of baffles and the upper surface of the lower set of baffles to enhance the sealing effect.

[0036] The second cavity 200 is divided into three chambers by upper and lower partition plates. The first partition plate 240 and the second partition plate 250 are fixed to the inner wall of the second cavity 200 and can be integrally formed during manufacturing. The first partition plate 240 and the second partition plate 250 divide the second cavity 200 into three chambers, which are right chamber 1 210, right chamber 220 and right chamber 3 230 from top to bottom. The right chamber 1 210, right chamber 220 and right chamber 3 230 have the same volume, but can also be set to different sizes as needed.

[0037] In the three cavities on the right, a first sampling port 12 is provided on the lower side wall of the third right cavity 230, and a second sampling port 13 is provided on the lower side wall of the first right cavity 210. The first sampling port 12 and the second sampling port 13 are equipped with switches to control the flow of exudate. In addition, the first sampling port 12 and the second sampling port 13 can also be connected to an extension tube. The extension tube can be placed in the sampling tube for use, which can avoid splashing when the liquid is sampled.

[0038] The first cavity 100 and the second cavity 200 are connected by one-way valves. These one-way valves are located on the cavity partition plates 300, with the following positions: a first one-way valve 310 is located on the partition plate 300 near the lower side of the right first cavity 210; a second one-way valve 320 is located on the partition plate 300 near the upper side of the right third cavity 230; and a third one-way valve is located on the partition plate 300 near the lower side of the right third cavity 230. It should be noted that the installation directions of the one-way valves are different: the first and second one-way valves 310 control the liquid flow from left to right, while the third one-way valve 330 controls the liquid flow from right to left. In addition, the second check valve 320 is positioned higher than the lowest position of the float 400. That is, when the float 400 is in contact with the lower set of baffles, the lowest point of the second check valve 320 is higher than the upper surface of the float 400. At the same time, the lowest point of the first check valve 310 is higher than the upper surface of the upper set of baffles.

[0039] The volume of the right third cavity 230 is greater than the space formed by the lower surface of the lower set of baffles and the bottom surface of the first cavity 100.

[0040] like Figure 5 , Figure 6 , Figure 7 and Figure 8 The diagram illustrates the working principle of the sampling device.

[0041] like Figure 5 As shown, during the first collection period, the float 400 adheres to a set of baffles below due to gravity. At this time, the liquid flowing into the first chamber 100 from the inlet 11 flows into the right third chamber 230 through the second one-way valve 320 until the right third chamber 230 is filled with liquid. At this time, the first time period ends. During this period, liquid can be sampled at one or two time points. When sampling at one time point, a sample can be taken at any time point within the first time period. When sampling at two time points, a sample needs to be taken at the beginning of the first time period and then at any time point within the first time period.

[0042] like Figure 6 and Figure 7As shown, during the second time period of collection, the right third chamber 230 is filled with liquid. At this time, the third one-way valve 330 is opened under the pressure of the liquid, and the liquid enters the left lower chamber 120. As the liquid continues to flow in through the second one-way valve, more and more liquid flows into the left lower chamber 120. When the liquid 120 contacts and pushes the float 400 upward away from the lower set of baffles, the liquid will flow from the concave hole 420, continuously pushing the float 400 upward. The left lower chamber 120 also gradually increases in size until the float 400 contacts the lower surface of the upper set of baffles, at which point the second time period ends. No sampling is performed during this time period. The right second chamber is a sealed structure and does not participate in the flow of liquid. This is also to reduce the time of this period so that new sampling can be performed as soon as possible.

[0043] like Figure 8 As shown, during the third time period of collection, the liquid will flow from the upper left chamber 110 into the right chamber 210 through the first one-way valve 310. Similarly, during this time period, liquid can be sampled at one or two time points. When sampling at one time point, the sample can be taken at any time point in the third time period. When sampling at two time points, the sample needs to be taken once at the beginning of the third time period and then at any time point in the third time period.

[0044] Taking a sample at the beginning of the time period ensures that the liquid is fresh and the small amount means that the impact of the initial small amount can be ignored when the liquid has accumulated for a period of time before taking another sample.

[0045] In addition, to facilitate observation of the collection of seepage, the entire device is made of transparent material, and scale lines are set in the left and right cavities to record the sampling points.

[0046] The above embodiments are not intended to limit the present invention. Any modifications, equivalent substitutions or improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An exudate collection and sampling device, comprising: The main body of the sampling device is a shell that is sealed on all four sides and hollow inside. The shell is divided into a first cavity and a second cavity by a cavity partition plate. The upper surface of the first cavity has a liquid inlet. The inner wall of the first cavity has two sets of baffles that protrude inward, and there is a float plate between the two sets of baffles. The float plate has a concave hole that is the same shape and position as the baffle but smaller in size. The second cavity is divided into three cavities by two partition plates. Sampling ports are respectively set on the lower side of the upper and lower cavities. The first cavity and the second cavity are connected by a one-way valve.

2. The exudate collection and sampling device of claim 1, wherein, The baffle is a rectangular block, and a silicone sealing layer is fixed to the lower surface of the upper set of baffles and the upper surface of the lower set of baffles.

3. The exudate collection and sampling device of claim 1, wherein, The outer ring of the float plate is connected to a skirt, which forms a sealed space between the baffle and the inner wall of the first cavity.

4. The exudate collection and sampling device of claim 1, wherein, The three cavities in the second cavity are, from top to bottom, right cavity one, right cavity two, and right cavity three.

5. A device for collecting and sampling exudate according to claim 4, wherein, A first one-way valve is provided on the cavity partition plate on the lower side of the right cavity, and a second one-way valve and a third one-way valve are respectively provided on the cavity partition plates on the upper and lower sides of the right third cavity.

6. A device for collecting and sampling exudate according to claim 5, wherein, The first and second check valves control the liquid to flow from left to right, and the third check valve controls the liquid to flow from right to left.

7. A device for collecting and sampling exudate according to claim 6, wherein, The opening pressure of the third check valve is the pressure of the liquid in the right three chambers.

8. The exudate collection and sampling device of claim 7, wherein, The volume of the right third cavity is greater than the volume of the space formed by the lower set of baffles and the first cavity.

9. The exudate collection and sampling device of claim 8, wherein, The third check valve is positioned above the upper surface of the float when it is at its lowest position.

10. The exudate collection and sampling device of claim 9, wherein, The first check valve is located above the upper surface of the upper set of baffles.

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