Hip and knee joint cavity perfusion drainage device

Abstract

The utility model relates to a hip and knee joint cavity perfusion drainage device. The device comprises a drug delivery mechanism and a suction mechanism which are arranged in vitro; the drug feeding mechanism is connected with a drug injection header pipe, the suction mechanism is connected with a drainage header pipe, and the drug injection header pipe and the drainage header pipe enter a human body through a skin incision; the medicine injection header pipe is arranged in a forked mode after entering a human body to form medicine injection branch pipes used for being placed in a hip joint cavity or a knee joint cavity, and medicine injection holes are evenly distributed in the medicine injection branch pipes. The main drainage pipe is arranged in a forked mode after entering the body, and a suction branch pipe used for being placed in a hip joint cavity or a knee joint cavity is formed. According to the utility model, a self-made simple medicine injection drainage tube commonly used in clinic at present can be replaced, so that the local part of an articular cavity is continuously, stably and uniformly dosed, the optimal effect of locally applying antibiotics is achieved, and the stable high-concentration state of the antibiotics is maintained. Meanwhile, skin incisions can be reduced, and the risks of incision infection and reverse infection are avoided.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and more specifically, to a hip and knee joint cavity irrigation and drainage device. Background Technology

[0002] Total joint replacement surgery is currently the best treatment option for end-stage joint diseases, which can effectively solve problems such as pain, limited mobility, and functional impairment, and improve the quality of life after surgery.

[0003] Periprosthetic infection is a catastrophic complication of joint replacement surgery and a major cause of revision surgery. Clearing stubborn bacteria from the joint cavity is crucial for treatment, requiring high concentrations of antibiotics locally. Current intravenous antibiotics generally cannot achieve the necessary high concentrations in the joint cavity; therefore, local application of antibiotics after joint debridement or primary revision surgery is an important approach to treating periprosthetic infection.

[0004] Existing methods for administering topical antibiotics include intraoperative application of antibiotic powder, postoperative intra-articular injection, and intra-articular catheter-based local infusion. Intraoperative application of antibiotic powder has a short duration of action, and postoperative intra-articular injection is complex and carries the risk of secondary infection. Therefore, intra-articular catheter-based local infusion is increasingly used in clinical practice.

[0005] However, there is no unified method or device for intra-articular intracavitary catheter local irrigation. Commercially available drainage tubes and three-way tubes are commonly used as substitutes. The daily injection is performed by doctors, which requires high aseptic operation, is complicated, and results in uneven distribution of drug solution in the joint cavity. There is also the risk of tube blockage, which affects the therapeutic effect of local drug administration.

[0006] Furthermore, if multiple drainage tubes are placed, the skin incision for tube placement may become infected and fail to heal, and the risk of retrograde infection from the tube placement site to the joint cavity increases. Utility Model Content

[0007] The purpose of this application is to provide a hip and knee joint cavity irrigation and drainage device for treating periprosthetic infections of the hip or knee joint. It can effectively simplify the operation process, reduce the number of replacement incisions, avoid infection risks, and at the same time ensure uniform perfusion of drugs in the joint cavity, maintain a continuous and stable high concentration of antibiotics in the joint cavity, so as to achieve the purpose of clearing stubborn bacteria in the joint cavity.

[0008] To achieve the above objectives, this utility model provides a hip and knee joint cavity irrigation and drainage device, including a drug delivery mechanism and a suction mechanism disposed outside the body;

[0009] The drug delivery mechanism is connected to a main injection tube, and the suction mechanism is connected to a main drainage tube. The main injection tube and the main drainage tube are respectively inserted into the body through skin incisions.

[0010] The main injection tube branches after entering the body, forming injection branch tubes for insertion into the hip joint cavity or knee joint cavity. Injection holes are evenly distributed on the injection branch tubes.

[0011] The main drainage tube branches after entering the body, forming a suction branch for insertion into the hip or knee joint cavity.

[0012] In an optional embodiment, a wearing housing is also included, on which the drug delivery mechanism and the suction mechanism are mounted.

[0013] In an optional embodiment, the drug delivery mechanism includes a drug storage container, a drug delivery tube, and a drug delivery pump, with one end of the drug delivery tube connected to the drug storage container and the other end connected to the drug delivery pump.

[0014] In an optional embodiment, the drug delivery pump is connected to the main injection pipe, and a control valve for controlling the amount of drug liquid pumped is provided between the drug delivery pump and the main injection pipe.

[0015] In an optional embodiment, the main injection tube includes an external injection tube with an inner diameter of 4-10 mm and a wall thickness of 0.8-1.2 mm.

[0016] In an optional embodiment, the injection branch pipe includes a bifurcated injection semicircular pipe, the injection holes are evenly distributed along the axial length of the injection semicircular pipe, and the closed cross section of the injection semicircular pipe has the same cross-sectional dimensions as the injection circular pipe.

[0017] The injection semicircular tube includes a planar sidewall and a curved sidewall, and the injection holes are staggered between the planar sidewall and the curved sidewall along the axial direction of the injection semicircular tube.

[0018] In an optional embodiment, the diameter of the injection hole is 1-2 mm, and the spacing between them on the injection branch tube is 8-12 mm.

[0019] In an optional embodiment, the main drainage tube includes a drainage circular tube located outside the body, the drainage circular tube being connected to a three-way valve, and the two outlet branches of the three-way valve being respectively connected to a negative pressure drainage bottle and a drainage ball;

[0020] The inner diameter of the drainage tube is 8-16 mm, and the wall thickness is 0.8-1.2 mm.

[0021] In an optional embodiment, the suction branch tube includes a bifurcated drainage semicircular tube, the closed cross section of which has the same cross-sectional dimensions as the drainage circular tube.

[0022] In an optional embodiment, a support strip is provided at the center of the drainage semicircular tube, and the support strip is used to divide the semicircular tube cavity of the drainage semicircular tube into two independent cavities.

[0023] Each of the drainage semicircular tubes includes a planar sidewall and a curved sidewall. The curved sidewall is provided with a long strip cut. The long strip cut extends along the axial direction of the support strip, and the long strip cuts on the two cavities are symmetrically arranged with the support strip as the center.

[0024] The hip and knee joint cavity irrigation and drainage device of this invention can replace the currently commonly used self-made simple drug injection and drainage tubes, so that the joint cavity can be continuously, stably and evenly drug-eluting, achieving the best effect of local application of antibiotics and maintaining a stable high concentration of antibiotics.

[0025] At the same time, by setting up a main injection tube and a main drainage tube, and combining the bifurcation settings of both after entering the body, the number of skin incisions can be reduced, avoiding the risk of incision infection and retrograde infection.

[0026] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the hip and knee joint cavity irrigation and drainage device in this application;

[0029] Figure 2 This is a schematic diagram of the drug injection tube in this application;

[0030] Figure 3 This is a schematic diagram of the cross-sectional structure of the injection tube in this application;

[0031] Figure 4 This is a schematic diagram of the cross-sectional structure of the suction branch pipe in this application;

[0032] Figure 5 This is a schematic diagram of the structure of the main injection tube and the main drainage tube at the bifurcation point in this application.

[0033] icon:

[0034] 1-Drug delivery mechanism; 11-Drug storage container; 12-Drug delivery tube; 13-Drug delivery pump; 14-Control valve;

[0035] 2-Suction mechanism;

[0036] 3-Main injection tube;

[0037] 4- Drainage main pipe; 41- Three-way valve; 42- Negative pressure drainage bottle; 43- Drainage ball;

[0038] 5-Injection tube; 51-Injection port;

[0039] 6-Suction branch tube; 61-Support strip; 62-Diaphragm; 63-Long strip incision;

[0040] 7. Wear the casing. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0042] In the description of this application, it should be noted that the terms "inner" and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0043] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "setup" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0044] The hip and knee joint cavity irrigation and drainage device in this application is mainly used for drug injection and aspiration in the hip and knee joint cavities. By setting up a main injection tube and a main drainage tube, and then branching them after entering the body, the number of skin incisions is reduced. At the same time, by making necessary structural settings for the branch tubes after branching, the uniform drug delivery is achieved.

[0045] See Figure 1 and combined Figures 2-5The hip and knee joint cavity irrigation and drainage device of this utility model mainly includes a drug delivery mechanism 1 and a suction mechanism 2 installed outside the body.

[0046] The drug delivery mechanism 1 and the suction mechanism 2 are mainly used to continuously infuse external antibiotic drugs into the hip joint cavity or knee joint cavity, and to suction out synovial fluid from the body.

[0047] The drug delivery device 1 is connected to the drug injection manifold 3. During the drug delivery process, a certain injection pressure is generated by the drug delivery device 1, and the antibiotic drug is pumped into the body by the drug injection manifold 3.

[0048] The suction mechanism 2 is connected to the drainage manifold 4. During the suction process, a certain suction negative pressure is created by the suction mechanism 2, and the joint fluid is drained from the body to the outside by the drainage manifold 4.

[0049] The injection manifold 3 and the drainage manifold 4 are inserted into the body through skin incisions. Specifically, the injection manifold 3 and the drainage manifold 4 are inserted into the body through separate skin incisions, which can greatly reduce the number of skin incisions and minimize the risk of infection.

[0050] After entering the body, the main injection tube 3 branches off to form injection branch tubes 5, which can widen the injection range in the joint cavity. At the same time, the branch tubes 5 can be inserted into the hip or knee joint cavity. Combined with the injection holes 51 evenly distributed on the injection branch tubes 5, uniform drug delivery can be achieved inside the hip or knee joint cavity.

[0051] The external drug delivery device 1 can form a continuous and stable drug delivery state. Combined with the evenly distributed injection holes 51, it can further maintain a relatively continuous and stable high concentration of antibiotics in the hip joint cavity or knee joint cavity, so as to achieve a good antibacterial treatment effect.

[0052] After entering the body, the main drainage tube 4 branches off to form a suction branch tube 6 that widens the drainage range in the joint cavity. At the same time, the branching design allows the suction branch tube 6 to be inserted into the hip or knee joint cavity, thus effectively draining the synovial fluid.

[0053] The hip and knee joint cavity irrigation and drainage device of this invention can be used in antibacterial treatment of the hip or knee joint cavity. When the hip joint cavity is treated with drugs, the bifurcated injection branch 5 and aspiration branch 6 are respectively placed in the front and rear sides of the hip joint prosthesis.

[0054] When administering medication to the knee joint cavity, the bifurcated injection tube 5 and aspiration tube 6 are inserted into the left and right sides of the knee joint prosthesis, respectively.

[0055] In order to achieve effective drug injection and drainage, the injection branch tube 5 and the aspiration branch tube 6 have a certain overlapping area inside the joint cavity so as to fully cover the internal space of the joint cavity.

[0056] Furthermore, to facilitate patients' wearing of the hip and knee joint cavity irrigation and drainage device and enhance the overall portability of the device, the hip and knee joint cavity irrigation and drainage device of this utility model also includes a wearing shell 7. By integrating the drug delivery mechanism 1 and the suction mechanism 2 into the wearing shell 7, the device, along with the attached tubing, can be worn without affecting the patient's postoperative activities. This allows the patient to get out of bed and walk appropriately after joint cavity debridement or primary revision surgery, thus improving postoperative recovery.

[0057] Based on the specific structure of the drug delivery mechanism 1 and the drug delivery tube 12, in one specific embodiment, the drug delivery mechanism 1 located outside the body includes a drug storage container 11, a drug delivery tube 12 and a drug delivery pump 13. The drug storage container 11 is mainly used to store antibiotic drugs and to supply drugs to the drug delivery pump 13 through the drug delivery tube 12.

[0058] Based on this, one end of the administration tube 12 is connected to the drug storage container 11, and the other end is connected to the administration pump 13. Specifically, the liquid inlet end of the administration tube 12 is connected to the drug storage container 11, and the liquid inlet end is connected to the administration pump 13. Through the suction action of the administration pump 13, combined with the connection between the administration pump 13 and the main injection pipe 3, the antibiotic drug is pumped into the main injection pipe 3.

[0059] The drug storage container 11 has a volume of about 150ml and can hold a two-week supply of antibiotic solution. A control valve 14 for controlling the amount of drug solution pumped is provided between the drug delivery pump 13 and the main injection pipe 3. Furthermore, the drug delivery pump 13 is specifically a peristaltic pump.

[0060] By using the control valve 14, the drug delivery pump 13 can pump the same amount of drug solution from the drug storage container 11 into the joint cavity with each pumping action during intermittent drug delivery. Combined with continuous intermittent pumping actions, it can ensure the daily required amount of antibiotic solution of about 2-4 ml.

[0061] Furthermore, the drug delivery pump 13 is specifically a micro peristaltic pump. The micro peristaltic pump can continuously deliver drugs, ensuring continuous flow of the drug solution in the tubing, preventing drug sedimentation, and controlling the 24-hour pumping volume to not exceed 2-4 ml. At the same time, the amount of drug solution pumped each time can be adjusted according to the specific situation to meet the treatment needs of different degrees of disease.

[0062] The injection manifold 3 in this application includes an external injection tube that facilitates entry into the body through a skin incision and also facilitates branching within the body.

[0063] Specifically, the inner diameter of the injection tube is 4-10 mm and the wall thickness is 0.8-1.2 mm. Preferably, the wall thickness of the injection tube is 1 mm, which can ensure the stability and reliability of the subsequent bifurcation structure.

[0064] From the perspective that the main injection pipe 3 and the injection branch pipe 5 can be easily pulled out, the injection branch pipe 5 in this embodiment includes two injection semicircular pipes formed by bifurcations, and the combined cross-section of the two injection semicircular pipes is the same as the cross-sectional size of the injection circular pipe.

[0065] To ensure the injection range, each injection semicircular tube is provided with injection holes 51. The injection holes 51 are evenly distributed along the axial length of the injection semicircular tube, which facilitates the release of the drug solution in different segments of the injection semicircular tube, thus forming an effective and uniform drug delivery.

[0066] Meanwhile, based on the structure of the injection semicircular tube, which includes a planar sidewall and a curved sidewall, the injection holes 51 are interlaced between the planar sidewall and the curved sidewall along the axial direction of the injection semicircular tube, which can form a three-dimensional distribution of drug delivery within the joint cavity, ensuring the uniformity and stability of drug delivery to the greatest extent.

[0067] In this embodiment, the diameter of the injection hole 51 is 1-2 mm, and the interval length between it and the injection branch tube 5 is 8-12 mm, so as to ensure that the medicine flows into the joint cavity evenly.

[0068] Based on the specific structure of the suction mechanism 2 and the drainage tube, in another specific embodiment, the main drainage tube 4 includes a drainage circular tube located outside the body, which facilitates entry into the body through a skin incision and also facilitates branching within the body.

[0069] The drainage tube located outside the body is connected to a three-way valve 41. Specifically, the drainage tube is connected to the inlet end of the three-way valve 41 to draw out the joint fluid in the body. The two outlet branches of the three-way valve 41 are respectively connected to a negative pressure drainage bottle 42 and a drainage ball 43.

[0070] The flow direction of synovial fluid can be controlled by the three-way valve 41. Specifically, one of the outlets of the three-way valve 41 can be collected by the vacuum negative pressure constructed by the negative pressure drainage bottle 42, and the other outlet can be discharged through the drainage ball 43 for the testing and analysis of synovial fluid.

[0071] Furthermore, the inner diameter of the drainage tube is 8-16mm, and the wall thickness is preferably 0.8-1.2mm, with the wall thickness being 1mm, which can ensure the stability and reliability of the subsequent bifurcation structure.

[0072] It should be noted that the inner diameter of the drainage tube is larger than that of the injection tube, which allows for sufficient aspiration and drainage of synovial fluid.

[0073] Meanwhile, from the perspective that the main drainage pipe 4 and the suction branch pipe 6 can be smoothly pulled out, the suction branch pipe 6 in this embodiment includes two semi-circular drainage pipes formed by bifurcations, and the combined cross-section of the two semi-circular drainage pipes is the same as the cross-sectional size of the drainage pipe.

[0074] In this embodiment, a support strip 61 is provided in the center of the drainage semicircular tube. The support strip 61 is used to divide the semicircular tube cavity of the drainage semicircular tube into two independent cavities 62, which can be used for suction through the long strip cuts 63 respectively provided on the cavities 62.

[0075] Furthermore, the drainage semicircular tube includes a planar sidewall and a curved sidewall. The elongated cut 63 is set on the curved sidewall. In order to form an effective drainage effect, the elongated cut 63 extends along the axial direction of the support bar 61, and the elongated cuts 63 on the two cavities 62 are symmetrically arranged with the support bar 61 as the center.

[0076] This design allows the aspiration branch tube 6 to form a blood groove tube structure. The groove formed by the long incision 63 ensures smooth outflow of joint fluid, preventing early postoperative blood clotting and drainage tube blockage.

[0077] The long strip cuts 63 symmetrically arranged around the support bar 61 can form an effective drainage groove and widen the drainage range, ensuring the pumping effect.

[0078] The hip and knee joint cavity irrigation and drainage device of this invention can simplify the operation process, reduce replacement incisions, avoid infection links, ensure uniform irrigation of the joint cavity, and maintain a continuous and stable high concentration of antibiotics in the joint cavity, so as to achieve the purpose of clearing stubborn bacteria in the joint cavity.

[0079] It should be noted that, where there is no conflict, the features in the embodiments of this application can be combined with each other.

[0080] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A hip and knee joint cavity irrigation and drainage device, characterized in that, This includes externally located drug delivery mechanisms and suction mechanisms; The drug delivery mechanism is connected to a main injection tube, and the suction mechanism is connected to a main drainage tube. The main injection tube and the main drainage tube are respectively inserted into the body through skin incisions. The main injection tube branches after entering the body, forming injection branch tubes for insertion into the hip joint cavity or knee joint cavity. Injection holes are evenly distributed on the injection branch tubes. The main drainage tube branches after entering the body, forming a suction branch for insertion into the hip or knee joint cavity.

2. The hip and knee joint cavity irrigation and drainage device according to claim 1, characterized in that, It also includes a wearing housing, on which the drug delivery mechanism and the suction mechanism are mounted.

3. The hip and knee joint cavity irrigation and drainage device according to claim 1, characterized in that, The drug delivery mechanism includes a drug storage container, a drug delivery tube, and a drug delivery pump. One end of the drug delivery tube is connected to the drug storage container, and the other end is connected to the drug delivery pump.

4. The hip and knee joint cavity irrigation and drainage device according to claim 3, characterized in that, The drug delivery pump is connected to the main injection pipe, and a control valve for controlling the amount of drug liquid pumped is provided between the drug delivery pump and the main injection pipe.

5. The hip and knee joint cavity irrigation and drainage device according to claim 1, characterized in that, The main injection tube includes an external injection tube with an inner diameter of 4-10 mm and a wall thickness of 0.8-1.2 mm.

6. The hip and knee joint cavity irrigation and drainage device according to claim 5, characterized in that, The injection branch pipe includes a bifurcated injection semicircular pipe, the injection holes are evenly distributed along the axial length of the injection semicircular pipe, and the closed cross section of the injection semicircular pipe is the same as the cross section size of the injection circular pipe. The injection semicircular tube includes a planar sidewall and a curved sidewall, and the injection holes are staggered between the planar sidewall and the curved sidewall along the axial direction of the injection semicircular tube.

7. The hip and knee joint cavity irrigation and drainage device according to claim 1, characterized in that, The diameter of the injection hole is 1-2 mm, and the spacing between them on the injection branch tube is 8-12 mm.

8. The hip and knee joint cavity irrigation and drainage device according to claim 1, characterized in that, The main drainage tube includes a drainage circular tube located outside the body. The drainage circular tube is connected to a three-way valve. The two outlet branches of the three-way valve are respectively connected to a negative pressure drainage bottle and a drainage ball. The inner diameter of the drainage tube is 8-16 mm, and the wall thickness is 0.8-1.2 mm.

9. The hip and knee joint cavity irrigation and drainage device according to claim 8, characterized in that, The suction branch tube includes a bifurcated drainage semicircular tube, the closed cross section of which has the same cross-sectional dimensions as the drainage circular tube.

10. The hip and knee joint cavity irrigation and drainage device according to claim 9, characterized in that, A support bar is provided in the center of the drainage semicircular tube. The support bar is used to divide the semicircular tube cavity of the drainage semicircular tube into two independent cavities. Each of the drainage semicircular tubes includes a planar sidewall and a curved sidewall. The curved sidewall is provided with a long strip cut. The long strip cut extends along the axial direction of the support strip, and the long strip cuts on the two cavities are symmetrically arranged with the support strip as the center.

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