Anti-blocking filtering suction drainage tube

Abstract

The utility model belongs to the field of medical instruments, and particularly relates to an anti-blocking filtering suction drainage tube which is composed of a top cover, a shell, an outer filter screen and an inner filter screen, the outer filter screen and the inner filter screen are arranged in the shell, the top cover and the shell are connected through threads, a one-way hole is formed in the side face of the top cover, and negative pressure can be adjusted through the hole when the negative pressure is too large; the surface of the shell is provided with anti-skid lines to facilitate operation; a clamping groove is formed in the inner filter screen, a boss is arranged on the outer filter screen, the inner filter screen can be sleeved with the outer filter screen to be fixed and positioned through cooperation of the clamping groove and the boss, when the filter screens are blocked, the drainage tube does not need to be replaced, only the top cover needs to be opened to replace the inner filter screen, replacement is convenient, and bone fragments of a patient can be conveniently intercepted and taken out during autogenous bone transplantation; all the components are made of transparent materials, operators can conveniently observe and adjust the components in time in the using process, the probability that the drainage tube is blocked is reduced, and the drainage efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the field of medical equipment, and in particular relates to an anti-blocking filtering suction drainage tube. Background Art

[0002] Drainage is a commonly used medical method in clinical practice, which is used to drain body fluids from the patient's body during surgery to avoid symptoms such as inflammation and bacterial infection. Especially in orthopedic surgery, fat blocks, blood clots, and bone fragments in the drainage fluid will gradually block the filter holes. At the same time, the continuous stirring of the drainage fluid under the action of negative pressure will also accelerate the transformation of blood into blood clots, resulting in a continuous decrease in the intensity of negative pressure suction during long-term, uninterrupted drainage until the filter is completely blocked. After the filter is completely blocked, the drainage tube can only be replaced, which increases unnecessary surgical time and costs. At the same time, it is difficult to avoid some liquid seeping out from the edge of the filter during the drainage process, and the unfiltered liquid carries some solids directly into the downstream, which reduces the drainage efficiency and brings unpredictable risks.

[0003] CN207768883U proposes a scheme in which filter screens are arranged at all parts of the drainage tube, and an anticoagulant coating is added to the surface of the filter screens, which greatly reduces the interference of blood clots on drainage. However, if any filter screen of the drainage tube is blocked, the overall efficiency of the system will be reduced. After blockage, the entire drainage tube can only be replaced, and other solid impurities in the liquid such as fat blocks and bone fragments still seriously interfere with the drainage effect; CN216456280U provides a drainage scheme combining inner and outer filter screens, but the inner and outer filter screens in this scheme are only for increasing the filtration area and prolonging the filtration time. After blockage, the drainage tube still needs to be replaced as a whole, and the inner and outer filter screens are connected in a bottom net manner, which is only suitable for digestive fluid drainage and re-infusion operations. It is difficult to remove the patient's bone fragments inside the filter screen when performing autologous bone transplantation.

[0004] Therefore, whether it is possible to provide a drainage tube that is more suitable for use in orthopedic surgery has become one of the problems that need to be solved urgently in this field. Summary of the invention

[0005] In view of the above problems, the utility model proposes an anti-clogging filtering suction drainage tube, which consists of a top cover, an outer shell, an outer filter screen and an inner filter screen inside the outer shell. The top cover and the outer shell are connected by threads, and a one-way hole is provided on the side of the top cover, which can adjust the negative pressure when the negative pressure is too large; the surface of the outer shell has anti-slip patterns for easy operation; the inner filter screen has a slot and the outer filter screen has a boss, and the two can cooperate to fix and position the inner filter screen inside the outer filter screen. When the filter screen is blocked, there is no need to replace the drainage tube, only the top cover needs to be opened to replace the inner filter screen. The convenient replacement is also convenient for intercepting and removing the patient's bone fragments during autologous bone transplantation; each component is made of transparent material, which is convenient for the operator to observe and adjust in time during use, thereby reducing the probability of drainage tube blockage and improving drainage efficiency.

[0006] The specific technical solution of the utility model is as follows:

[0007] A blocking-proof filtering suction drainage tube comprises a top cover, an outer shell and a negative pressure collection system, wherein the top cover is connected to a suction tube via an upper interface, the lower part of the outer shell is connected to a negative pressure pipeline via a negative pressure interface, and the negative pressure collection system is connected via the negative pressure pipeline;

[0008] A sealing column is arranged inside the top cover, and the sealing column is located directly below the upper interface; at least one one-way hole is arranged on the side wall of the top cover outside the sealing column.

[0009] The inner side of the shell is provided with a clamping platform, an outer filter screen is overlapped on the clamping platform, the outer filter screen includes an outer filter cavity, an outer filter hole is provided on the outer filter cavity, an outer filter platform is provided on the upper part of the outer filter cavity, a convex platform is provided on the top of the outer filter cavity, and the outer filter platform is placed on the clamping platform; an inner filter screen is clamped in the outer filter screen, the inner filter screen includes an inner filter cavity, an inner filter hole is provided on the inner filter cavity, an inner filter platform is provided on the top of the inner filter cavity, and a clamping groove is provided on the inner filter platform, which cooperates with the convex platform of the outer filter cavity;

[0010] Furthermore, a guide column is provided under the outer filter stage to play a guiding role during assembly, and the center is found after the guide column contacts the inner wall to prevent eccentricity from interfering with subsequent thread assembly.

[0011] The diameter of the outer filter cavity is larger than the diameter of the inner filter cavity, and the aperture of the outer filter hole is larger than the aperture of the inner filter hole. When installed, the positions of the two correspond.

[0012] Filter platform holes are arranged on both the outer filter platform and the inner filter platform; and the outer diameter of the outer filter platform is larger than the outer diameter of the inner filter platform, and the outer diameters of both are adapted to the top cover or the outer shell at the corresponding position.

[0013] The top cover is connected to the outer shell by threads, and a groove is provided at the lower inner side of the top cover to adapt to the outer filter stage overlapped on the clamping stage; a one-way valve is provided at the lower upper interface of the top cover to prevent the liquid from entering the top cover from flowing back; and a limiter is provided at the outer side of the upper interface of the top cover.

[0014] The anti-clogging filtering suction drainage tube with the above structure is used. Before use, the outer filter screen is first placed in the outer shell, specifically, the outer filter platform is placed on the clamping platform, and then the inner filter screen is placed on the inner side of the outer filter screen, and the boss on the top of the outer filter chamber is used to cooperate with the clamping groove on the inner filter platform to connect the two. At this time, the positions of the outer filter hole and the inner filter hole correspond, and then the top cover and the outer shell are sealed together through threads. At this time, the groove on the lower inner side of the top cover and the clamping platform clamp the outer filter platform to complete the combination operation of the outer shell and the top cover; when in use, the suction tube is connected to the upper interface of the top cover, specifically, it can be connected by sleeve or threaded connection, and a clamp can also be used for further sealing and fixing; when sleeve connection is used, it is preferred to set a directional groove on the base of the suction tube, which cooperates with the limiter on the top cover to better position and fix the suction tube.

[0015] At the same time, the negative pressure pipeline is connected to the negative pressure interface under the shell, and the negative pressure collection system is connected through the negative pressure pipeline; at this time, the user holds the shell and uses the suction tube to drain the surgical site to suck the liquid produced during the operation out of the surgical site. This part of the liquid enters the top cover through the one-way valve and directly enters the inner filter net under the limiting action of the sealing column. The solid substances such as fat blocks, bone fragments and blood clots in the liquid are filtered out through the inner and outer filter holes, and the liquid components enter the shell cavity after passing through the inner and outer filter holes, and then are sucked into the negative pressure collection system through the negative pressure pipeline; when the drainage volume is large, the liquid will overflow from the top of the inner filter net into the inside of the top cover. At this time, this part of the liquid will pass through the filter table holes on the inner and outer filter tables in sequence and be filtered to prevent the overflowed liquid from directly entering the shell cavity and blocking the negative pressure pipeline.

[0016] Since the present application adopts the structure of inner and outer double-layer filter screens, it is particularly suitable for collecting bone residues in orthopedic surgery, and thus for autologous bone transplantation surgery. In the existing drainage tube, the filter screen will be clogged due to the gradual increase in the amount of debris during the collection process. At this time, the doctor needs to take out the filter screen and remove the collected debris and disinfect it again before installing and using it. In this process, it is necessary to clean the debris and find a suitable container to collect the debris, which greatly wastes the operation time. The double filter screen of the present application not only meets the filtering requirements, but also can directly take out the inner filter screen when the filtering capacity of the inner filter screen decreases, and then screw on the top cover and continue to collect with the outer filter screen. Often, after the inner and outer filters are collected, the needs of one operation can be met, and sufficient bone residues required for autologous bone transplantation surgery can be collected, which greatly shortens the operation time and reduces the difficulty of operation during the drainage process.

[0017] At least one one-way hole is arranged on the side wall of the top cover outside the sealing column. When the suction pressure is too large, the one-way hole can be opened to inject air into the top cover to adjust the suction pressure. In order to prevent the one-way hole from opening automatically under pressure, a hole cap can be set on the one-way hole, and the hole cap can be removed when needed.

[0018] When the inner filter screen filters too much solid matter and causes blockage, the drainage can be suspended by closing the Robert clamp of the negative pressure pipeline, and the top cover can be directly opened to pull the inner filter screen out of the outer filter screen. At this time, the inner filter screen can be replaced with a new one, or only the outer filter screen can be used for filtration as described above. The specific decision can be made according to the progress of the operation. When orthopedic surgery requires autologous bone transplantation, the bone tissue filtered out of the inner filter screen can be removed and processed for autologous bone transplantation. This is more convenient than the existing single filter screen drainage device and does not affect the normal drainage of the operation.

[0019] In order to further improve the sealing effect, a sealing ring is provided at the threaded connection portion between the top cover and the shell.

[0020] Anti-slip textures are arranged on the outer side of the shell to facilitate users to hold.

[0021] The suction tube can be prepared into different shapes as needed to facilitate drainage in different surgical scenarios, and only requires the rear interface to cooperate with the upper interface.

[0022] All of the above components can be made of transparent silicone or transparent plastic, which is convenient for observing and adjusting the drainage effect in time during the operation.

[0023] To sum up, with the drainage tube of the above structure, there is no need to replace the drainage tube when the filter is blocked. You only need to open the top cover and replace the inner filter. The convenient replacement is also convenient for intercepting and removing the patient's bone fragments during autologous bone transplantation. Each component is made of transparent material, which is convenient for the operator to observe and adjust in time during use, reducing the chance of drainage tube blockage and improving drainage efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the structure of the anti-blocking filtering suction drainage tube;

[0025] Figure 2 A half-section view of the top cover and the shell in an assembled state;

[0026] Figure 3 for Figure 2 The enlarged view of point A in the middle;

[0027] Figure 4 is a schematic structural diagram of the top cover;

[0028] Figure 5 is a schematic structural diagram of the housing;

[0029] Figure 6 is a schematic structural diagram of the outer filter;

[0030] Figure 7 is a schematic structural diagram of the inner filter;

[0031] Figure 8 It is a structural schematic diagram of the combined state of the inner and outer filters;

[0032] Fig. 9 Schematic diagram of the suction tube structure with two different bending degrees;

[0033] In the figure, 1 is the top cover, 2 is the outer shell, 3 is the negative pressure pipeline, 4 is the suction tube, 5 is the negative pressure collection system, 1-1 is the upper interface, 1-2 is the one-way valve, 1-3 is the one-way hole, 1-4 is the sealing column, 1-5 is the groove, 1-6 is the limiter, 2-1 is the outer filter, 2-11 is the outer filter table, 2-12 is the filter table hole, 2-13 is the outer filter hole, 2-14 is the boss, 2-15 is the guide column, 2-2 is the inner filter, 2-21 is the inner filter, 2-22 is the card slot, 2-23 is the inner filter hole, 2-3 is the anti-slip texture, 2-4 is the negative pressure interface, 2-5 is the card connection table, and 4-1 is the directional groove. DETAILED DESCRIPTION

[0034] The following is a further detailed description of the above contents of the utility model through specific implementation methods in the form of embodiments. All technologies realized based on the above contents of the utility model belong to the scope of the utility model.

[0035] like Figure 1-8 As shown, the utility model provides an anti-blocking filtering suction drainage tube, comprising a top cover 1, a shell 2 and a negative pressure collection system 5, wherein the top cover 1 is connected to a suction tube 4 through an upper interface 1-1, the lower part of the shell 2 is connected to a negative pressure pipeline 3 through a negative pressure interface 2-4, and the negative pressure collection system 5 is connected through the negative pressure pipeline 3;

[0036] A sealing column 1-4 is arranged inside the top cover 1, and the sealing column 1-4 is located directly below the upper interface 1-1; at least one one-way hole 1-3 is arranged on the side wall of the top cover outside the sealing column 1-4.

[0037] A snap-in platform 2-5 is provided on the inner side of the outer shell 2, and an outer filter screen 2-1 is overlapped on the snap-in platform 2-5. The outer filter screen 2-1 includes an outer filter cavity, and an outer filter hole 2-13 is provided on the outer filter cavity. An outer filter platform 2-11 is provided on the upper part of the outer filter cavity, and a boss 2-14 is provided on the top of the outer filter cavity. The outer filter platform 2-11 is placed on the above-mentioned snap-in platform 2-5; further, a guide column 2-15 is provided under the outer filter platform 2-11, which plays a guiding role during assembly, and the center is found after the guide column contacts the inner wall to prevent eccentricity from interfering with subsequent threaded assembly.

[0038] The inner filter 2-2 is clamped in the outer filter 2-1, and the inner filter 2-2 includes an inner filter cavity, and an inner filter hole 2-23 is arranged on the inner filter cavity. An inner filter platform 2-21 is arranged on the top of the inner filter cavity, and a clamping groove 2-22 is arranged on the inner filter platform 2-21, and the clamping groove 2-22 cooperates with the boss 2-14 of the outer filter cavity;

[0039] The diameter of the outer filter cavity is larger than the diameter of the inner filter cavity, and the aperture of the outer filter hole is larger than the aperture of the inner filter hole, and the positions of the two correspond during installation; filter table holes 2-12 are provided on the outer filter table 2-11 and the inner filter table 2-21; and the outer diameter of the outer filter table 2-11 is larger than the outer diameter of the inner filter table 2-21, and the outer diameters of the two are adapted to the top cover or outer shell at the corresponding position.

[0040] The top cover 1 is connected to the outer shell 2 by threads, and a groove 1-5 is provided at the lower inner side of the top cover 1 to fit the outer filter stage 2-21 overlapped on the clamping stage 2-5; a one-way valve 1-2 is provided at the lower upper interface 1-1 of the top cover to prevent the liquid from flowing back into the top cover; and a limiter 1-6 is provided at the outer side of the upper interface of the top cover.

[0041] In order to further improve the sealing effect, a sealing ring is provided at the threaded connection portion between the top cover and the shell.

[0042] Anti-slip patterns 2-3 are arranged on the outer side of the housing 2 to facilitate the user's grip.

[0043] All of the above components can be made of transparent silicone or transparent plastic, which is convenient for observing and adjusting the drainage effect in time during the operation.

[0044] The anti-clogging filtering suction drainage tube with the above structure is used. Before use, the outer filter is first placed in the shell, specifically, the outer filter stage is placed on the clamping stage, and then the inner filter is placed inside the outer filter. The boss on the top of the outer filter cavity is connected with the clamping groove on the inner filter stage, and the two are combined into one. Then the top cover and the shell are sealed together through threads. At this time, the groove on the lower inner side of the top cover and the clamping stage clamp the outer filter stage to complete the combination operation of the shell and the top cover. When in use, the suction tube is connected to the upper interface of the top cover, which can be specifically connected by sleeve connection or thread connection, and a clamp can also be used for further sealing and fixing.

[0045] When the sleeve connection is adopted, it is preferred to set an orientation groove 4-1 on the base of the suction tube 4, which cooperates with the limiter 1-6 on the top cover to better position and fix the suction tube.

[0046] At the same time, the negative pressure pipeline is connected to the negative pressure interface under the shell, and the negative pressure collection system is connected through the negative pressure pipeline; at this time, the user holds the shell and uses the suction tube to drain the surgical site to suck the liquid produced during the operation out of the surgical site. This part of the liquid enters the top cover through the one-way valve and directly enters the inner filter net under the limiting action of the sealing column. The solid substances such as fat blocks, bone fragments and blood clots in the liquid are filtered out through the inner and outer filter holes, and the liquid components enter the shell cavity after passing through the inner and outer filter holes, and then are sucked into the negative pressure collection system through the negative pressure pipeline; when the drainage volume is large, the liquid will overflow from the top of the inner filter net into the inside of the top cover. At this time, this part of the liquid will pass through the filter table holes on the inner and outer filter tables in sequence and be filtered to prevent the overflowed liquid from directly entering the shell cavity and blocking the negative pressure pipeline.

[0047] At least one one-way hole is arranged on the side wall of the top cover outside the sealing column. When the suction pressure is too large, the one-way hole can be opened to inject air into the top cover to adjust the suction pressure. In order to prevent the one-way hole from opening automatically under pressure, a hole cap can be set on the one-way hole, and the hole cap can be removed when needed.

[0048] When the inner filter screen filters too much solid matter and causes blockage, the drainage can be stopped by closing the Robert clamp on the negative pressure pipeline 3, and the top cover can be directly opened to pull the inner filter screen out of the outer filter screen. At this time, a new inner filter screen can be replaced, or only the outer filter screen can be used for filtration. The specific decision can be made according to the progress of the operation. When orthopedic surgery requires autologous bone transplantation, the bone tissue filtered out of the inner filter screen can be removed and processed for autologous bone transplantation. Compared with the existing single filter screen drainage device, it is more convenient and does not affect the normal drainage of the operation.

[0049] The above is only a preferred specific implementation method of the utility model, but the protection scope of the utility model is not limited to it. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the utility model according to the technical scheme and utility model concept of the utility model, which should be covered by the protection scope of the utility model.

Claims

1. A blocking-proof filtering suction drainage tube, comprising a top cover (1), a housing (2) and a negative pressure collection system (5), characterized in that: The top cover (1) is connected to a suction tube (4) via an upper interface (1-1), the lower portion of the housing (2) is connected to a negative pressure pipeline (3) via a negative pressure interface (2-4), and the negative pressure pipeline (3) is connected to a negative pressure collection system (5); A sealing column (1-4) is provided inside the top cover (1), and the sealing column (1-4) is located directly below the upper interface (1-1); at least one one-way hole (1-3) is provided on the side wall of the top cover outside the sealing column (1-4); A clamping platform (2-5) is provided on the inner side of the housing (2), and an external filter screen (2-1) is overlapped on the clamping platform (2-5); the external filter screen (2-1) comprises an external filter cavity, an external filter hole (2-13) is provided on the external filter cavity, an external filter platform (2-11) is provided on the upper part of the external filter cavity, a boss (2-14) is provided on the top of the external filter cavity, and the external filter platform (2-11) is placed on the clamping platform (2-5); The inner filter screen (2-2) is clamped in the outer filter screen (2-1), the inner filter screen (2-2) comprises an inner filter cavity, the inner filter cavity has an inner filter hole (2-23), the top of the inner filter cavity is provided with an inner filter platform (2-21), the inner filter platform (2-21) is provided with a clamping groove (2-22), and the clamping groove (2-22) cooperates with the boss (2-14) of the outer filter cavity.

2. The anti-clogging filtering suction drainage tube according to claim 1, characterized in that: The diameter of the outer filter cavity is greater than the diameter of the inner filter cavity, the aperture of the outer filter hole is greater than or equal to the aperture of the inner filter hole, and the positions of the two correspond during installation.

3. The anti-clogging filtering suction drainage tube according to claim 1 or 2, characterized in that: The outer filter stage (2-11) and the inner filter stage (2-21) are both provided with filter stage holes (2-12); and the outer diameter of the outer filter stage (2-11) is greater than the outer diameter of the inner filter stage (2-21).

4. The anti-clogging filtering suction drainage tube according to claim 1, characterized in that: The top cover (1) is connected to the outer shell (2) via threads, and a groove (1-5) is provided at the lower inner side of the top cover (1) for fitting an outer filter stage (2-11) overlapped on the clamping stage (2-5).

5. The anti-clogging filtering suction drainage tube according to claim 1 or 4, characterized in that: A one-way valve (1-2) is provided below the upper interface (1-1) of the top cover.

6. The anti-clogging filtering suction drainage tube according to claim 4, characterized in that: A sealing ring is provided at the threaded connection portion between the top cover (1) and the outer shell (2).

7. The anti-clogging filtering suction drainage tube according to claim 1 or 4, characterized in that: Anti-slip patterns (2-3) are provided on the outer side of the housing (2).

8. The anti-clogging filtering suction drainage tube according to claim 1 or 4, characterized in that: A limiter (1-6) is provided on the outer side of the upper interface of the top cover, and a directional groove (4-1) is provided on the base of the suction tube (4).

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