Knee joint effusion lavage device
By designing a separate tee connection and anti-reverse cavity structure, the problem of rinsing fluid and effusion in knee joint lavage cannot be isolated, achieving complete separation of rinsing fluid and countercurrent prevention, avoiding contamination.
Patent Information
- Application Number
- CN202422930857.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-29
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2034-11-29
AI Technical Summary
During knee lavage, the rinse fluid and the accumulation of fluid cannot be completely isolated, and misoperation can easily lead to contamination of the rinse fluid.
A knee joint effusion device including a puncture needle, a tee connection, a suction tube and a flushing tube is designed. The inner part of the tee connection is separated into an inner cavity and an outer cavity, and the inner cavity is connected to the flushing tube, and the outer cavity is In communication with the suction tube, an anti-reverse cavity and a micro spring are installed in the middle of the inner cavity. The blocking block blocks the flare mouth to block the flow of the flushing liquid and prevent retrograde.
It effectively avoids contamination of the flush circuit, prevents waste liquid from entering the flush circuit in retrograde, and ensures the cleanliness of the flush solution.
Smart Images
Figure CN222265363U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field related to knee joint effusion lavage, in particular to a knee joint effusion lavage device. Background Art
[0002] On the one hand, knee joint lavage can flush out the detached cartilage debris and part of the loose bodies in the joint cavity caused by the subsynovial bone joint, thereby reducing the wear of the cartilage surface and the inflammation caused by these debris or the pain caused by the locking of the joint cavity; on the other hand, flushing can fully drain the denatured synovial fluid and play a role in decompressing the joint.
[0003] During knee joint lavage, the accumulated fluid is first aspirated, then irrigating fluid is injected into the joint cavity, and then the irrigating fluid is extracted. This is repeated 2-3 times until the extracted fluid becomes visibly clear.
[0004] Knee joint lavage requires a puncture needle, which can be connected to an aspiration tube and an irrigation tube at the same time. The aspiration tube is used to extract the effusion and irrigation fluid, while the irrigation tube is used to inject irrigation fluid. This can minimize the contamination of the irrigation fluid by the effusion. However, both the irrigation fluid and the extracted effusion must pass through the puncture needle and cannot be completely isolated. In addition, both irrigation and extraction are generally performed using a syringe. If the operator misoperates the irrigation syringe, the waste fluid will be drawn into the irrigation fluid, causing the entire irrigation fluid to be contaminated. Utility Model Content
[0005] The purpose of the utility model is to provide a knee joint effusion irrigation device to solve the problem proposed in the above-mentioned background technology that during knee joint irrigation, both the irrigation fluid and the extracted effusion must pass through the puncture needle and cannot be completely isolated. In addition, both irrigation and extraction are generally performed using a syringe. If the operator misoperates the irrigation syringe, waste liquid will be drawn into the irrigation liquid, thereby causing the entire irrigation liquid to be contaminated.
[0006] The utility model is implemented by the following technical scheme: a knee joint effusion lavage device, comprising a puncture needle, a three-way connector, a suction tube and a flushing tube, the tail of the puncture needle is fixedly connected to the three-way connector, the tail of the three-way connector is connected to the suction tube and the flushing tube, the interior of the three-way connector is divided into an inner cavity and an outer cavity, the inner cavity is connected to the flushing tube, and the outer cavity is connected to the suction tube;
[0007] The middle section of the inner cavity is provided with an anti-reverse cavity, in which a micro spring is installed, and the micro spring is connected to a blocking block, and the blocking block is blocked at the connection between the inner cavity and the anti-reverse cavity to block the flow of flushing liquid. The puncture needle is divided into two parts, an inner needle and an outer needle, the inner cavity is connected to the inner needle, and the outer cavity is connected to the outer needle.
[0008] As a further solution of the utility model: the inner needle and the outer needle of the puncture needle are coaxially arranged, and the outer needle is sleeved on the outside of the inner needle.
[0009] As a further solution of the utility model: the blocking block is spherical, the connection between the inner cavity and the anti-reversal cavity is a bell mouth, and the size of the bell mouth matches the blocking block.
[0010] As a further solution of the utility model: the flushing liquid in the inner cavity flows from top to bottom, and the blocking block blocks the bell mouth from bottom to top.
[0011] As a further solution of the utility model: the inner cavity is vertically shaped and passes through a three-way connector from top to bottom, and the top end is connected to a flushing tube, and the bottom end is connected to the inner needle, and the flushing tube is connected to a flushing syringe.
[0012] As a further solution of the utility model: the outer cavity is arranged outside the inner cavity, and the top end of the outer cavity is connected to the suction tube, and the bottom end is connected to the outer needle, and the suction tube is connected to the suction syringe.
[0013] As a further solution of the utility model: the three-way connector is made of transparent material.
[0014] Advantages of the utility model: The utility model can completely separate the flushing liquid from the waste liquid, which can effectively avoid the problem of contamination of the flushing circuit. In addition, the inner cavity used for flushing has the effect of preventing the flushing liquid from flowing back, which can avoid the waste liquid from flowing back into the flushing circuit due to operator misoperation. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0016] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.
[0017] Figure 2 It is a schematic diagram of the external structure of the utility model.
[0018] Figure 3 It is a schematic diagram of the internal structure of the three-way connector of the utility model.
[0019] Figure 4 It is a schematic diagram of the internal structure of the anti-reverse cavity of the utility model.
[0020] In the figure, 1. puncture needle; 11. inner needle; 12. outer needle; 2. three-way connector; 21. inner cavity; 211. anti-reverse cavity; 212. micro spring; 213. blocking block; 214. bell mouth; 22. outer cavity; 3. suction tube; 31. suction syringe; 4. flushing tube; 41 flushing syringe. DETAILED DESCRIPTION
[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0022] See also Figure 1-Figure 4 In an embodiment of the utility model, a knee joint effusion irrigation device includes a puncture needle 1, a three-way connector 2, a suction tube 3 and a flushing tube 4, the tail of the puncture needle 1 is fixedly connected to the three-way connector 2, the tail of the three-way connector 2 is connected to the suction tube 3 and the flushing tube 4, the interior of the three-way connector 2 is divided into an inner cavity 21 and an outer cavity 22, the inner cavity 21 is connected to the flushing tube 4, and the outer cavity 22 is connected to the suction tube 3; the puncture needle 1 is divided into two parts, an inner needle 11 and an outer needle 12, the inner cavity 21 is connected to the inner needle 11, and the outer cavity 22 is connected to the outer needle 12.
[0023] The inner needle 11 and the outer needle 12 of the puncture needle 1 are coaxially arranged, and the outer needle 12 is sleeved on the outside of the inner needle 11. The inner cavity 21 is vertically connected to the three-way connector 2, and the top end is connected to the flushing tube 4, and the bottom end is connected to the inner needle 11. The flushing tube 4 is connected to the flushing syringe 41. The outer cavity 22 is arranged outside the inner cavity 21, and the top end of the outer cavity 22 is connected to the suction tube 3, and the bottom end is connected to the outer needle 12, and the suction tube 3 is connected to the suction syringe 31.
[0024] When the utility model is used, after the puncture needle 1 is inserted into the joint cavity, the joint cavity is aspirated with the suction syringe 31 and the suction tube 3, and then the flushing liquid (such as 0.9% sodium chloride injection) is injected into the joint cavity through the flushing syringe 41 and the flushing tube 4, and then the flushing liquid is extracted through the suction tube 3, and this is repeated 2-3 times until the extracted liquid becomes obviously clear;
[0025] During the whole perfusion and flushing process, the flushing liquid in the flushing syringe 41 enters the joint cavity through the flushing tube 4, the inner cavity 21, and the inner needle 11. When the waste liquid is sucked, the waste liquid enters the outer needle 12, the outer cavity 22, and the suction tube 3 from the joint cavity. The flushing and suction take different channels, so there is no situation where the flushing liquid is contaminated. The three-way connector 2 is made of transparent material. It is convenient for people to observe the flow of the internal liquid.
[0026] The middle section of the inner cavity 21 is provided with an anti-reverse cavity 211, in which a micro spring 212 is installed, and the micro spring 212 is connected to a blocking block 213, and the blocking block 213 blocks the connection between the inner cavity 21 and the anti-reverse cavity 211 to block the flow of the flushing liquid;
[0027] The blocking block 213 is spherical, and the connection between the inner cavity 21 and the anti-reversal cavity 211 is a bell mouth 214, and the size of the bell mouth 214 matches the blocking block 213. The flushing liquid in the inner cavity 21 flows from top to bottom, and the blocking block 213 blocks the bell mouth 214 from bottom to top.
[0028] During clinical operation, since both extraction and flushing are performed using syringes, sometimes the operator makes a mistake in operation. For example, the flushing syringe 41 should be pushed forward, but the operator accidentally pulls the flushing syringe 41 backward, causing the flushing tube 4 used for flushing to start sucking the waste fluid in the joint cavity, allowing the waste fluid to retrograde into the flushing syringe 41, causing contamination of the flushing fluid. The design of the anti-reverse cavity 211 and the blocking block 213 of the utility model can prevent this situation from occurring. The working principle is as follows:
[0029] The operator pushes the flushing syringe 41 forward, and the flushing liquid in the flushing syringe 41 enters the flushing tube 4 and the inner cavity 21. The flow direction of the flushing liquid is opposite to the direction of the blocking block 213. Therefore, the flushing liquid will push the blocking block 213 away, exposing the bell mouth 214, allowing the flushing liquid to continue to flow to the inner needle 11 through the anti-reverse cavity 211 and enter the joint cavity. When the operator makes an error and pulls the flushing syringe 41 backward, the flushing liquid in the inner cavity 21 flows in the reverse direction and is consistent with the direction of the blocking block 213, which will cause the bell mouth 214 to be tightly blocked in the direction of the blocking block 213, preventing the flushing liquid from flowing through the anti-reverse cavity 211, which will cause the flushing syringe 41 to be unable to be pulled. Therefore, after the flushing syringe 41 is connected to the flushing circuit, the utility model can only push forward for flushing and cannot be pulled backward for suction, thereby achieving the effect of preventing mistakes and backflow.
[0030] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A knee joint effusion lavage device, comprising a puncture needle (1), a three-way connector (2), a suction tube (3) and a flushing tube (4), characterized in that: The tail of the puncture needle (1) is fixedly connected to the three-way connector (2), the tail of the three-way connector (2) is connected to the suction tube (3) and the flushing tube (4), the interior of the three-way connector (2) is divided into an inner cavity (21) and an outer cavity (22), the inner cavity (21) is connected to the flushing tube (4), and the outer cavity (22) is connected to the suction tube (3); An anti-reverse cavity (211) is provided in the middle section of the inner cavity (21), a micro spring (212) is installed in the anti-reverse cavity (211), the micro spring (212) is connected to a blocking block (213), the blocking block (213) blocks the connection between the inner cavity (21) and the anti-reverse cavity (211) to block the flow of flushing liquid, the puncture needle (1) is divided into two parts, an inner needle (11) and an outer needle (12), the inner cavity (21) is connected to the inner needle (11), and the outer cavity (22) is connected to the outer needle (12).
2. A knee joint effusion lavage device according to claim 1, characterized in that: The inner needle (11) and the outer needle (12) of the puncture needle (1) are coaxially arranged, and the outer needle (12) is sleeved on the outside of the inner needle (11).
3. A knee joint effusion lavage device according to claim 1, characterized in that: The blocking block (213) is spherical, and the connection between the inner cavity (21) and the anti-reversal cavity (211) is a bell mouth (214), and the size of the bell mouth (214) matches that of the blocking block (213).
4. A knee joint effusion lavage device according to claim 1, characterized in that: The flushing liquid in the inner cavity (21) flows from top to bottom, while the blocking block (213) blocks the bell mouth (214) from bottom to top.
5. A knee joint effusion lavage device according to claim 1, characterized in that: The inner cavity (21) passes through the three-way connector (2) vertically up and down, and the top end of the inner cavity (21) is connected to the flushing tube (4), the bottom end of the inner cavity (21) is connected to the inner needle (11), and the flushing tube (4) is connected to the flushing syringe (41).
6. A knee joint effusion lavage device according to claim 1, characterized in that: The outer cavity (22) is arranged outside the inner cavity (21), and the top end of the outer cavity (22) is connected to the suction tube (3), the bottom end of the outer cavity (22) is connected to the outer needle (12), and the suction tube (3) is connected to the suction syringe (31).
7. A knee joint effusion lavage device according to claim 1, characterized in that: The three-way connecting piece (2) is made of transparent material.