Knee joint effusion flushing and dosing device

Abstract

The knee joint effusion flushing and dosing device comprises a liquid storage tank, a partition plate located in the middle is integrally arranged in the liquid storage tank, a conveying pump located on one side of the partition plate is fixedly installed at the bottom in the liquid storage tank, and a liquid conveying guide pipe is fixedly installed on the conveying pump; the other end of the liquid feeding guide pipe is fixedly provided with a liquid inlet pipe, the other end of the liquid inlet pipe is fixedly provided with a water spraying round head, the liquid inlet pipe is fixedly sleeved with an outer sleeve, the bottom of the outer sleeve is integrally provided with a connecting port, and the outer portion of the outer sleeve is provided with a handle. According to the knee joint hydrops flushing and dosing device, harmful substances in joints are removed by injecting flushing fluid into joint cavities, operation is easy, trauma is small, the joints do not need to be cut open, operation risks are reduced, recovery time is shortened, the application range is wide, and the knee joint hydrops flushing and dosing device can be used for treating multiple joints such as hip joints and shoulder joints.

Description

Technical Field

[0001] The invention relates to the technical field of medical equipment, in particular to a knee joint effusion flushing and medication device. Background Art

[0002] Knee osteoarthritis is a chronic progressive osteoarthritis that endangers the health of the elderly. With the aging of the population, the incidence of this disease is increasing. The main symptoms are joint swelling, pain, and movement disorders, which seriously affect people's work and quality of life. For patients with effusion and swelling in the knee joint, there are currently two main treatment methods at home and abroad: surgical knee arthroscopy and conservative arthrocentesis.

[0003] Currently, joint irrigation is mostly performed by puncturing the inner and outer sides of the knee joint in a separate inlet and outlet manner. Multiple punctures often increase the patient's pain. At the same time, multiple puncture points also increase the chance of postoperative infection. In addition, soft tissue damage caused during joint puncture, such as damage to blood vessels, nerves, cartilage, etc., is also severe, resulting in slow postoperative recovery and even infection, as well as incomplete flushing of postoperative effusion. Summary of the invention

[0004] In view of the defects in the prior art, the present invention provides a knee joint effusion flushing and medication device, comprising a liquid storage tank, a partition located in the middle of the liquid storage tank is integrally arranged inside, a delivery pump located on one side of the partition is fixedly installed at the bottom of the liquid storage tank, a liquid delivery conduit is fixedly installed on the delivery pump, a liquid inlet pipe is fixedly installed on the other end of the liquid delivery conduit, a water spray round head is fixedly installed on the other end of the liquid inlet pipe, an outer sleeve is fixedly sleeved on the outside of the liquid inlet pipe, a connecting port is integrally arranged on the bottom of the outer sleeve, a handle is arranged on the outside of the outer sleeve, one end of the outer sleeve is integrally connected to a fixing ring located outside the water spray round head, a return pipe is fixedly installed on the bottom of the connecting port, the other end of the return pipe is fixedly installed on one side of the liquid storage tank, an extraction pump is arranged at the connection between the return pipe and the liquid storage tank, and evenly distributed suction holes are opened in the middle of the fixing ring.

[0005] Preferably, a control button is provided on the top of the handle, and the two control buttons are electrically connected to the delivery pump and the extraction pump respectively, and the connection between the return liquid pipe and the liquid storage tank is located on the other side of the partition.

[0006] Preferably, a sewage pipe located directly below the liquid return pipe is fixedly installed on one side of the liquid storage tank, a filling port is provided on the top of the liquid storage tank, and the connection between the filling port and the liquid storage tank is located on one side of the partition.

[0007] Preferably, the outer sleeve is coaxially arranged with the liquid inlet pipe, a plurality of evenly distributed fixing frames are fixedly installed on the outer circumference of the liquid inlet pipe, the outer circumference of the fixing frame is fixedly installed on the inner wall of the outer sleeve, a clamping spring is fixedly installed inside the outer sleeve close to the water spray round head, a sealing ring is fixedly installed on the side of the clamping spring facing the fixing ring, and the other side of the sealing ring is clamped against a fixing frame.

[0008] Preferably, the outer circumferential surface of the sealing ring is sealingly and slidingly connected to the inner wall of the outer sleeve, the inner ring surface of the sealing ring is sealingly and slidingly connected to the outer circumferential surface of the liquid inlet pipe, the other side of the sealing ring is integrally connected with a movable inclined block that passes through the through groove of the fixed frame, the inclined surface of the movable inclined block is provided with a sliding groove, the interior of the sliding groove is slidingly connected with a movable rod, the movable rod is slidingly connected to the outer sleeve, and the other end of the movable rod is fixedly mounted with an expansion strip located outside the outer sleeve.

[0009] Preferably, the inclined surface of the movable inclined block faces the inner wall of the outer sleeve, the central axis of the movable rod coincides with the center of the outer sleeve, one side of the expansion strip is an arc shape wrapped outside the fixing ring, and the expansion strip and the suction holes are arranged alternately in sequence.

[0010] Preferably, the water spray round head is evenly provided with a plurality of evenly distributed liquid spray holes, the diameter of the liquid spray holes is smaller than the diameter of the suction hole, a telescopic sleeve is fixedly installed inside the liquid inlet pipe, a sealing plate is provided at one end of the telescopic sleeve, and the sealing plate is located at the connection between the liquid inlet pipe and the water spray round head.

[0011] Preferably, a telescopic groove is provided inside the telescopic sleeve, a piston plate is slidably connected inside the telescopic groove, a pull rod is fixedly installed on one side of the piston plate, the pull rod is slidably connected to one end of the telescopic sleeve facing the water spray round head, and the sealing plate is fixedly installed to the other end of the pull rod.

[0012] Preferably, a clamping spring is provided on the outer sleeve of the pull rod, one end of the clamping spring is in close contact with the piston plate, and the other end of the clamping spring is in close contact with the inner wall of the telescopic groove, a convex ring is integrally provided at the connection between the liquid inlet pipe and the water spray round head, and the sealing plate is in close contact with the convex ring.

[0013] Preferably, a bracket pressed against the liquid inlet pipe is fixedly installed inside the outer sleeve, and one end of the pressing spring is fixedly installed on the outer sleeve through the bracket.

[0014] The beneficial effects of the present invention are embodied in:

[0015] 1. A knee joint effusion flushing and medication device is provided with a liquid inlet pipe, and the medicine is delivered from the liquid storage tank to the liquid delivery catheter and the liquid inlet pipe through a delivery pump, and is sprayed into the knee joint through a water spray round head for cleaning. After cleaning, the extraction pump is started, and the extraction pump extracts through the return pipe and the outer sleeve to generate negative pressure at the suction hole, and then the cleaning agent in the knee joint is sucked out into the cavity on the other side of the liquid storage tank through the suction hole, thereby flushing out inflammatory factors, pain factors, adhesion tissues or edematous inflammatory exudates in the joint cavity, and harmful substances in the joint are removed by injecting flushing fluid into the joint cavity. The operation is simple, the trauma is small, there is no need to cut the joint, the surgical risk and recovery time are reduced, and the application range is wide, and it can be used for the treatment of multiple joints, such as hip joints, shoulder joints, etc.

[0016] 2. This knee joint effusion flushing and medication device reduces the volume of the part that extends into the knee joint by providing a water spray ball head and a fixed ring, and the spherical water spray ball head and the rounded fixed ring reduce the edges and corners of the part that contacts the inside of the joint cavity, thereby reducing the damage caused by collision. At the same time, when the joint cavity medicine is absorbed, the negative pressure inside the outer sleeve causes the sealing ring to move to the side away from the fixed ring, thereby driving the movable bevel block to move, so that the movable bevel block pushes the movable rod and the expansion strip to expand, thereby preventing damage to the tissue inside the joint cavity when the absorption hole absorbs the medicine.

[0017] 3. This knee joint effusion flushing and medication device is equipped with a sealing plate. When the medicine is transported to the knee joint cavity through the liquid inlet pipe, the sealing plate and the liquid inlet pipe are separated under the impact of the medicine, and the medicine enters the water spray round head and is sprayed out. When the medicine is absorbed, the clamping spring pushes the piston plate and the pull rod to shrink into the telescopic groove, thereby making the sealing plate and the liquid inlet pipe tightly pressed against each other, preventing the medicine inside the joint cavity from entering the liquid inlet pipe and causing reflux contamination. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the specific embodiments or the description of the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 It is a structural schematic diagram of the liquid storage tank of the present invention;

[0021] Figure 3 It is a structural schematic diagram of the liquid inlet pipe of the present invention;

[0022] Figure 4For the present invention Figure 3 The enlarged view of point A in the middle;

[0023] Figure 5 It is a structural schematic diagram of the movable inclined block of the present invention;

[0024] Figure 6 It is a structural schematic diagram of the water spray round head of the present invention;

[0025] Figure 7 It is a schematic diagram of the partial structure of the sealing plate of the present invention;

[0026] Figure 8 It is a schematic structural diagram of the telescopic sleeve of the present invention.

[0027] In the attached figure: 1. liquid storage tank; 2. partition; 3. delivery pump; 4. liquid delivery conduit; 5. liquid inlet pipe; 6. water spray round head; 7. fixing frame; 8. outer sleeve; 9. connecting port; 10. liquid return pipe; 11. extraction pump; 12. sewage pipe; 13. handle; 14. control button; 15. tightening spring; 16. sealing ring; 17. movable inclined block; 18. sliding groove; 19. movable rod; 20. expansion strip; 21. fixing ring; 22. suction hole; 23. liquid spray hole; 24. telescopic sleeve; 25. telescopic groove; 26. piston plate; 27. pull rod; 28. clamping spring; 29. ​​sealing plate; 30. filling port. DETAILED DESCRIPTION

[0028] The following embodiments of the technical solution of the present invention are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and are therefore only used as examples, and cannot be used to limit the protection scope of the present invention.

[0029] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by those skilled in the art to which the invention belongs.

[0030] like Figures 1 to 8As shown, a knee joint effusion flushing and medication device comprises a liquid storage tank 1, wherein the liquid storage tank 1 is integrally provided with a partition plate 2 located in the middle, a delivery pump 3 located on one side of the partition plate 2 is fixedly installed at the bottom of the liquid storage tank 1, a liquid delivery conduit 4 is fixedly installed at the delivery pump 3, a liquid inlet pipe 5 is fixedly installed at the other end of the liquid delivery conduit 4, a water spraying round head 6 is fixedly installed at the other end of the liquid inlet pipe 5, an outer sleeve 8 is fixedly sleeved on the outside of the liquid inlet pipe 5, a connecting port 9 is integrally provided at the bottom of the outer sleeve 8, a grip 13 is provided on the outside of the outer sleeve 8, a fixing ring 21 located outside the water spraying round head 6 is integrally connected to one end of the outer sleeve 8, a liquid return pipe 10 is fixedly installed at the bottom of the connecting port 9, the other end of the liquid return pipe 10 is fixedly installed on one side of the liquid storage tank 1, an extraction pump 11 is provided at the connection between the liquid return pipe 10 and the liquid storage tank 1, and the middle of the fixing ring 21 Evenly distributed suction holes 22 are provided, and a liquid inlet pipe 5 is set up. The medicine is transported from the liquid storage tank 1 to the liquid delivery catheter 4 and the liquid inlet pipe 5 through the delivery pump 3, and is sprayed into the knee joint through the water spray round head 6 for cleaning. After cleaning, the extraction pump 11 is started, and the extraction pump 11 extracts through the return pipe 10 and the outer sleeve 8, generating negative pressure at the suction hole 22, and then the cleaning agent in the knee joint is sucked out into the cavity on the other side of the liquid storage tank 1 through the suction hole 22, so that the inflammatory factors, pain factors, adhesion tissue or edema of the inflammatory exudate in the joint cavity are flushed out, and the harmful substances in the joint are removed by injecting flushing fluid into the joint cavity. The operation is simple, the trauma is small, there is no need to cut the joint, the surgical risk and recovery time are reduced, and the application range is wide, and it can be used for the treatment of multiple joints, such as hip joints, shoulder joints, etc.

[0031] As an embodiment of the present invention, a control button 14 is provided on the top of the handle 13 , and the two control buttons 14 are electrically connected to the delivery pump 3 and the extraction pump 11 respectively. The connection between the return pipe 10 and the liquid storage tank 1 is located on the other side of the partition 2 .

[0032] As an embodiment of the present invention, a sewage pipe 12 is fixedly installed on one side of the liquid storage tank 1 and is located directly below the return pipe 10. A filling port 30 is provided on the top of the liquid storage tank 1, and the connection between the filling port 30 and the liquid storage tank 1 is located on one side of the partition 2.

[0033] As an embodiment of the present invention, the outer sleeve 8 is coaxially arranged with the liquid inlet pipe 5, and a plurality of evenly distributed fixing frames 7 are fixedly installed on the outer circumferential surface of the liquid inlet pipe 5, and the outer circumferential surface of the fixing frame 7 is fixedly installed on the inner wall of the outer sleeve 8, and a clamping spring 15 is fixedly installed inside the outer sleeve 8 near the side of the water spray round head 6, and a sealing ring 16 is fixedly installed on the side of the clamping spring 15 facing the fixing ring 21, and the other side of the sealing ring 16 is tightly arranged with a fixing frame 7.

[0034] As an embodiment of the present invention, the outer circumferential surface of the sealing ring 16 is sealingly and slidingly connected to the inner wall of the outer sleeve 8, the inner ring surface of the sealing ring 16 is sealingly and slidingly connected to the outer circumferential surface of the liquid inlet pipe 5, and the other side of the sealing ring 16 is integrally connected with a movable inclined block 17 that passes through the through groove of the fixed frame 7. The inclined surface of the movable inclined block 17 is provided with a sliding groove 18, and the interior of the sliding groove 18 is slidingly connected with a movable rod 19, the movable rod 19 is slidingly connected to the outer sleeve 8, and the other end of the movable rod 19 is fixedly installed with an expansion strip 20 located outside the outer sleeve 8.

[0035] As an embodiment of the present invention, the inclined surface of the movable bevel block 17 faces the inner wall of the outer sleeve 8, the central axis of the movable rod 19 coincides with the center of the outer sleeve 8, one side of the expansion strip 20 is an arc shape wrapped outside the fixing ring 21, and the expansion strip 20 and the suction hole 22 are arranged alternately in sequence. By setting the water spray round head 6 and the fixing ring 21, the volume of the part extending into the knee joint is reduced, and the spherical water spray ball head and the rounded fixing ring 21 reduce the edges and corners of the part in contact with the inside of the joint cavity, thereby reducing the damage caused by the collision. At the same time, when absorbing the joint cavity medicine, the negative pressure inside the outer sleeve 8 causes the sealing ring 16 to move to the side away from the fixing ring 21, thereby driving the movable bevel block 17 to move, so that the movable bevel block 17 pushes the movable rod 19 and the expansion strip 20 to expand, thereby preventing the suction hole 22 from causing damage to the tissue inside the joint cavity when absorbing the medicine.

[0036] As an embodiment of the present invention, the water spray round head 6 is evenly provided with a plurality of evenly distributed spray holes 23, the diameter of the spray hole 23 is smaller than the diameter of the suction hole 22, and a telescopic sleeve 24 is fixedly installed inside the liquid inlet pipe 5. A sealing plate 29 is provided at one end of the telescopic sleeve 24, and the sealing plate 29 is located at the connection between the liquid inlet pipe 5 and the water spray round head 6.

[0037] As an embodiment of the present invention, a telescopic groove 25 is opened inside the telescopic sleeve 24, and a piston plate 26 is slidably connected inside the telescopic groove 25. A pull rod 27 is fixedly installed on one side of the piston plate 26. The pull rod 27 is slidably connected to one end of the telescopic sleeve 24 facing the water spray round head 6, and a sealing plate 29 is fixedly installed on the other end of the pull rod 27.

[0038] As an embodiment of the present invention, a clamping spring 28 is provided on the outside of the pull rod 27, one end of the clamping spring 28 is in tight contact with the piston plate 26, and the other end of the clamping spring 28 is in tight contact with the inner wall of the telescopic groove 25. A convex ring is integrally provided at the connection between the liquid inlet pipe 5 and the water spray round head 6, and a sealing plate 29 is tightly arranged with the convex ring. By setting the sealing plate 29, when the medicine is transported to the inside of the knee joint joint cavity through the liquid inlet pipe 5, the sealing plate 29 is separated from the liquid inlet pipe 5 under the impact of the medicine, and the medicine enters the water spray round head 6 and is sprayed out. When the medicine is absorbed, the piston plate 26 and the pull rod 27 are pushed to shrink toward the inside of the telescopic groove 25 under the action of the clamping spring 28, so that the sealing plate 29 is tightly pressed against the liquid inlet pipe 5, thereby preventing the medicine inside the joint cavity from entering the liquid inlet pipe 5 and causing reflux pollution.

[0039] As an embodiment of the present invention, a bracket pressed against the liquid inlet pipe 5 is fixedly installed inside the outer sleeve 8 , and one end of the pressing spring 15 is fixedly installed on the outer sleeve 8 through the bracket.

[0040] It should be noted that when in use, the medicine is transported from the liquid storage tank 1 to the liquid delivery catheter 4 and the liquid inlet pipe 5 through the delivery pump 3, and is sprayed into the knee joint through the water spray round head 6 for cleaning. After cleaning, the extraction pump 11 is started, and the extraction pump 11 extracts through the return pipe 10 and the outer sleeve 8, generating negative pressure at the suction hole 22, and then the cleaning agent in the knee joint is sucked out into the cavity on the other side of the liquid storage tank 1 through the suction hole 22, thereby flushing out the inflammatory factors, pain factors, adhesion tissues or edematous inflammatory exudates in the joint cavity, and removing harmful substances in the joint by injecting flushing fluid into the joint cavity. By arranging the water spray round head 6 and the fixing ring 21, the volume of the part extending into the knee joint is reduced, and the spherical water spray ball head and the round fixing ring 21 make the part in contact with the inside of the joint cavity smaller. Some edges and corners are reduced, thereby reducing the damage caused by collision. At the same time, when the medicine in the joint cavity is absorbed, the negative pressure inside the outer sleeve 8 causes the sealing ring 16 to move to the side away from the fixed ring 21, thereby driving the movable bevel block 17 to move, so that the movable bevel block 17 pushes the movable rod 19 and the expansion strip 20 to expand, preventing the absorption hole 22 from absorbing the medicine and causing damage to the tissue inside the joint cavity. When the medicine is transported to the joint cavity of the knee joint through the liquid inlet pipe 5, the sealing plate 29 is separated from the liquid inlet pipe 5 under the impact of the medicine, and the medicine enters the water spray round head 6 and is sprayed out. When the medicine is absorbed, the piston plate 26 and the pull rod 27 are pushed to shrink toward the inside of the telescopic groove 25 under the action of the clamping spring 28, thereby making the sealing plate 29 press against the liquid inlet pipe 5, preventing the medicine inside the joint cavity from entering the inside of the liquid inlet pipe 5 and causing reflux pollution.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. A knee joint effusion flushing and medication device, comprising a fluid storage box (1), characterized in that: The liquid storage tank (1) is integrally provided with a partition plate (2) located in the middle, and a delivery pump (3) located on one side of the partition plate (2) is fixedly installed at the bottom of the liquid storage tank (1). The delivery pump (3) is fixedly installed with a liquid delivery conduit (4), and a liquid inlet pipe (5) is fixedly installed at the other end of the liquid delivery conduit (4), and a water spraying round head (6) is fixedly installed at the other end of the liquid inlet pipe (5). The outside of the liquid inlet pipe (5) is fixedly provided with an outer sleeve (8), and the bottom of the outer sleeve (8) is integrally provided with a connecting The outer sleeve (8) is provided with a handle (13) on the outside, one end of the outer sleeve (8) is integrally connected with a fixing ring (21) located outside the water spray round head (6), a liquid return pipe (10) is fixedly installed at the bottom of the connection port (9), the other end of the liquid return pipe (10) is fixedly installed on one side of the liquid storage tank (1), an extraction pump (11) is provided at the connection between the liquid return pipe (10) and the liquid storage tank (1), and the middle of the fixing ring (21) is provided with evenly distributed suction holes (22).

2. A knee joint effusion flushing and medication device according to claim 1, characterized in that: A control button (14) is provided on the top of the handle (13), and the two control buttons (14) are electrically connected to the delivery pump (3) and the extraction pump (11) respectively. The connection between the return pipe (10) and the liquid storage tank (1) is located on the other side of the partition (2).

3. A knee joint effusion flushing and medication device according to claim 2, characterized in that: A sewage discharge pipe (12) located directly below the liquid return pipe (10) is fixedly installed on one side of the liquid storage tank (1), and a filling port (30) is provided on the top of the liquid storage tank (1). The connection between the filling port (30) and the liquid storage tank (1) is located on one side of the partition (2).

4. A knee joint effusion flushing and medication device according to claim 1, characterized in that: The outer sleeve (8) is coaxially arranged with the liquid inlet pipe (5), a plurality of evenly distributed fixing frames (7) are fixedly installed on the outer peripheral surface of the liquid inlet pipe (5), the outer peripheral surface of the fixing frame (7) is fixedly installed with the inner wall of the outer sleeve (8), a pressing spring (15) is fixedly installed inside the outer sleeve (8) near the water spray round head (6), a sealing ring (16) is fixedly installed on one side of the pressing spring (15) facing the fixing ring (21), and the other side of the sealing ring (16) is pressed against a fixing frame (7).

5. A knee joint effusion flushing and medication device according to claim 4, characterized in that: The outer circumferential surface of the sealing ring (16) is sealingly and slidably connected to the inner wall of the outer sleeve (8), and the inner ring surface of the sealing ring (16) is sealingly and slidably connected to the outer circumferential surface of the liquid inlet pipe (5). The other side of the sealing ring (16) is integrally connected with a movable inclined block (17) that passes through the through groove of the fixed frame (7). The inclined surface of the movable inclined block (17) is provided with a sliding groove (18). The interior of the sliding groove (18) is slidingly connected with a movable rod (19). The movable rod (19) is slidingly connected to the outer sleeve (8), and the other end of the movable rod (19) is fixedly mounted with an expansion strip (20) located outside the outer sleeve (8).

6. A knee joint effusion flushing and medication device according to claim 5, characterized in that: The inclined surface of the movable inclined block (17) faces the inner wall of the outer sleeve (8), the central axis of the movable rod (19) faces the center of the outer sleeve (8) and coincides with the center, one side of the expansion strip (20) is in the shape of an arc wrapped around the outside of the fixing ring (21), and the expansion strip (20) and the suction hole (22) are arranged alternately in sequence.

7. A knee joint effusion flushing and medication device according to claim 1, characterized in that: The water spray round head (6) is evenly provided with a plurality of evenly distributed liquid spray holes (23), the diameter of the liquid spray holes (23) being smaller than the diameter of the suction hole (22), a telescopic sleeve (24) being fixedly installed inside the liquid inlet pipe (5), a sealing plate (29) being provided at one end of the telescopic sleeve (24), and the sealing plate (29) being located at the connection between the liquid inlet pipe (5) and the water spray round head (6).

8. A knee joint effusion flushing and medication device according to claim 7, characterized in that: The telescopic sleeve (24) is provided with a telescopic groove (25) inside, and a piston plate (26) is slidably connected inside the telescopic groove (25). A pull rod (27) is fixedly installed on one side of the piston plate (26). The pull rod (27) is slidably connected to one end of the telescopic sleeve (24) toward the water spray round head (6), and the sealing plate (29) is fixedly installed on the other end of the pull rod (27).

9. A knee joint effusion flushing and medication device according to claim 8, characterized in that: The outer sleeve of the pull rod (27) is provided with a clamping spring (28), one end of the clamping spring (28) is in close contact with the piston plate (26), and the other end of the clamping spring (28) is in close contact with the inner wall of the telescopic groove (25). A convex ring is integrally provided at the connection between the liquid inlet pipe (5) and the water spray round head (6), and the sealing plate (29) is set in close contact with the convex ring.

10. A knee joint effusion flushing and medication device according to claim 4, characterized in that: A bracket that is pressed against the liquid inlet pipe (5) is fixedly installed inside the outer sleeve (8), and one end of the pressing spring (15) is fixedly installed on the outer sleeve (8) through the bracket.

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