Hip and knee joint cavity perfusion drainage device

Abstract

The invention 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. The self-made medicine injection drainage tube can replace a self-made simple medicine injection drainage tube commonly used in clinic at present, so that the local part of an articular cavity is continuously, stably and uniformly dosed, the optimal effect of local application of 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] The present application relates to the technical field of medical devices, and in particular to a hip and knee joint cavity perfusion and drainage device. Background Art

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

[0003] Periprosthetic infection is a catastrophic complication after joint replacement and the main reason for revision after joint replacement. Removing stubborn bacteria from the joint cavity is the key to treatment, which requires that the antibiotics reach a very high concentration locally in the joint cavity. Current intravenous antibiotics generally cannot reach the required high concentration locally in the joint cavity. Therefore, local use of antibiotics after joint cavity debridement or primary revision surgery is an important means of treating periprosthetic infection.

[0004] Existing methods of using local antimicrobial drugs include local use of antimicrobial powders during surgery, postoperative joint cavity puncture injection, local perfusion through the joint cavity catheter, etc. The local use of antimicrobial powders during surgery has a short duration, and postoperative joint cavity puncture injection is complicated and has the risk of secondary infection. Therefore, the local perfusion method through the joint cavity catheter is gradually being used more and more in clinical practice.

[0005] However, there is no unified method and device for local perfusion of intra-articular catheters. Commercial drainage tubes and three-way tubes are often used as substitutes. Daily medication is performed by doctors, which requires high aseptic operation and complex procedures. The drug solution in the joint cavity is unevenly distributed, and there is a risk of tube blockage, which affects the therapeutic effect of local medication.

[0006] At the same time, if multiple drainage tubes are placed, the skin incisions where the tubes are placed may become infected and fail to heal, and the risk of retrograde infection of the joint cavity from the tube openings increases. Summary of the invention

[0007] The purpose of the present application is to provide a hip and knee joint cavity perfusion and drainage device for the treatment of hip or knee joint periprosthetic infection, which can effectively simplify the operation process, reduce the number of replacement incisions, and avoid the risk of infection. At the same time, it can ensure the uniform perfusion of drugs in 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.

[0008] In order to achieve the above-mentioned object, the present invention provides a hip and knee joint cavity perfusion and drainage device, comprising a drug delivery mechanism and a suction mechanism disposed outside the body;

[0009] The drug administration mechanism is connected to a drug injection main pipe, and the suction mechanism is connected to a drainage main pipe, and the drug injection main pipe and the drainage main pipe respectively enter the body through a skin incision;

[0010] The injection main tube is bifurcated after entering the body to form injection branches for insertion into the hip joint cavity or the knee joint cavity, and the injection branches are evenly distributed with injection holes;

[0011] The main drainage tube is bifurcated after entering the body to form a suction branch tube for being placed in the hip joint cavity or the knee joint cavity.

[0012] In an optional embodiment, it also includes a wearable shell, and the drug delivery mechanism and the suction mechanism are installed on the wearable shell.

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

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

[0015] In an optional embodiment, the drug injection main pipe includes a drug injection circular tube located in the extracorporeal part, and the inner diameter of the tube cavity of the drug injection circular tube is 4-10 mm and the wall thickness is 0.8-1.2 mm.

[0016] In an optional embodiment, the injection branch pipe comprises a bifurcated injection semicircular pipe, the injection holes are evenly spaced 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;

[0017] The drug injection semicircular tube comprises a plane side wall and a curved side wall, and the drug injection holes are staggered between the plane side wall and the curved side wall along the axial direction of the drug injection semicircular tube.

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

[0019] In an optional embodiment, the drainage main pipe includes a drainage round tube located in the external part, the drainage round tube is connected to a three-way valve, and two liquid outlet branches of the three-way valve are respectively connected to a negative pressure drainage bottle and a drainage ball;

[0020] The inner diameter of the drainage circular 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 forked drainage semicircular tube, and the closed cross-section of the drainage semicircular tube is the same as the cross-section size of the drainage circular tube.

[0022] In an optional embodiment, a support bar is provided at the middle of the drainage semicircular tube, and the support bar is used to separate the semicircular tube cavity of the drainage semicircular tube into two independent compartments;

[0023] Each of the drainage semicircular tubes comprises a plane side wall and a curved side wall. The curved side wall is provided with a long cutout, which extends along the axial direction of the support bar. The long cutouts on the two compartments are symmetrically arranged with the support bar as the center.

[0024] The hip and knee joint cavity perfusion and drainage device of the present invention can replace the homemade simple injection and drainage tube commonly used in clinical practice, so that the joint cavity can be continuously, stably and evenly dosed with drugs, 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 pipe and a main drainage pipe, combined with the bifurcation setting after the two enter the body, skin incisions can be reduced and the risks of incision infection and reverse infection can be avoided.

[0026] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

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

[0029] Figure 2 This is a schematic diagram of the structure of the injection branch pipe in this application;

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

[0031] Figure 4 It 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 injection main pipe and the drainage main pipe at the bifurcation position 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- injection main tube;

[0037] 4- drainage main pipe; 41- three-way valve; 42- negative pressure drainage bottle; 43- drainage ball;

[0038] 5- injection branch pipe; 51- injection hole;

[0039] 6- suction branch; 61- support bar; 62- compartment; 63- long incision;

[0040] 7- Wear the shell. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0042] In the description of this application, it should be noted that the terms "inside", "outside", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the application is usually placed when in use, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0043] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "disposed" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0044] The hip and knee joint cavity perfusion and drainage device in the present application is mainly used for drug injection and suction drainage in the hip joint cavity and the knee joint cavity. By setting up a main injection pipe and a main drainage pipe, and then bifurcating the two after entering the body, the number of skin incisions is reduced. At the same time, by making necessary structural settings for the branch pipes after bifurcation, the state of uniform drug administration is met.

[0045] See also Figure 1 , and combined with Figure 2-Figure 5The hip and knee joint cavity perfusion and drainage device of the present invention mainly comprises a drug administration mechanism 1 and a suction mechanism 2 arranged outside the body.

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

[0047] The drug administration mechanism 1 is connected to the drug injection main pipe 3. During the drug administration process, a certain drug injection pressure is built up through the drug administration mechanism 1, and the antibiotic drug is pumped into the body in combination with the drug injection main pipe 3.

[0048] The suction mechanism 2 is connected to a drainage main pipe 4. During the suction process, a certain suction negative pressure is constructed by the suction mechanism 2, and the joint fluid is drained from the body to the outside in combination with the drainage main pipe 4.

[0049] The injection main tube 3 and the drainage main tube 4 enter the body through skin incisions respectively. Specifically, the injection main tube 3 and the drainage main tube 4 enter the body through separate skin incisions respectively, which can greatly reduce the number of skin incisions and avoid infection risks to the greatest extent.

[0050] The main injection tube 3 is bifurcated after entering the body to form an injection branch tube 5 that widens the injection range in the joint cavity. At the same time, the injection branch tube 5 can be inserted into the hip joint cavity or the knee joint cavity through the bifurcated setting. Combined with the injection holes 51 evenly distributed on the injection branch tube 5, uniform drug delivery can be achieved in the hip joint cavity or the knee joint cavity.

[0051] Through the extracorporeal drug delivery mechanism 1, a continuous and stable drug delivery state can be formed, and combined with the evenly distributed injection holes 51, the inside of the hip joint cavity or the knee joint cavity can be further maintained in a relatively continuous and stable high antibiotic concentration state, so as to achieve a good antibacterial treatment effect.

[0052] The main drainage tube 4 is bifurcated after entering the body to form a suction branch tube 6 that widens the diversion range in the joint cavity. At the same time, through the bifurcated setting, the suction branch tube 6 can be placed into the hip joint cavity or the knee joint cavity to form an effective drainage of the joint fluid.

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

[0054] When the knee joint cavity is treated with drugs, the bifurcated injection branch tube 5 and the suction branch tube 6 are respectively placed in the left and right sides of the knee joint prosthesis.

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

[0056] Furthermore, in order to facilitate patients to carry the hip and knee joint cavity perfusion and drainage device on their body and enhance the portability of the overall device, the hip and knee joint cavity perfusion and drainage device in the present invention also includes a wearing shell 7. By integrating the drug delivery mechanism 1 and the suction mechanism 2 on the wearing shell 7, the device together with the accompanying pipelines can be worn on the body without affecting the patient's postoperative activities. It is convenient for patients to get out of bed and walk appropriately after joint cavity debridement or primary revision surgery, thereby improving postoperative recovery.

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

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

[0059] The volume of the drug storage container 11 is about 150 ml, and can accommodate two weeks' worth of antibiotic solution. A control valve 14 for controlling the amount of pumped drug solution is provided between the drug delivery pump 13 and the drug injection main pipe 3. Furthermore, the drug delivery pump 13 is specifically in the form of a peristaltic pump.

[0060] By setting the control valve 14, the dosing pump 13 can pump the same amount of medicine liquid into the joint cavity from the medicine storage container 11 each time during the intermittent drug delivery process. Combined with the continuous intermittent pumping action, the daily required amount of antibiotic solution of about 2-4 ml can be ensured.

[0061] Furthermore, the drug delivery pump 13 is specifically a micro peristaltic pump, which can deliver drugs continuously, ensure the continuous flow of the drug solution in the pipeline, prevent the drug solution from settling, and control the 24-hour pumping volume to not exceed the drug volume range of 2-4 ml. At the same time, the amount of drug solution pumped each time can be adjusted according to specific actual conditions to meet the treatment needs of different degrees of diseases.

[0062] The injection main tube 3 in the present application includes a circular injection tube located outside the body, which is convenient for entering the body through a skin incision and is also conducive to bifurcation inside the body.

[0063] Specifically, the inner diameter of the lumen 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 bifurcated structure.

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

[0065] In order to ensure the injection range, each injection semicircular tube is provided with injection holes 51, which are evenly spaced along the axial length of the injection semicircular tube, so as to facilitate the release of the drug solution in different segment areas of the injection semicircular tube, thereby forming effective and uniform drug delivery.

[0066] At the same time, based on the structure of the injection semicircular tube, the injection semicircular tube includes a flat side wall and a curved side wall, and the injection holes 51 are staggered between the flat side wall and the curved side wall along the axial direction of the injection semicircular tube, which can form a three-dimensional distribution of drug administration inside the joint cavity, thereby ensuring uniform and stable drug administration to the greatest extent.

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

[0068] Based on the specific structure of the suction mechanism 2 and the drainage pipeline, in another specific embodiment, the main drainage pipe 4 includes a drainage circular tube located outside the body, which is convenient for entering the body through a skin incision and is also conducive to bifurcation inside the body.

[0069] The drainage tube outside the body is connected to a three-way valve 41. Specifically, the drainage tube is connected to the liquid inlet end of the three-way valve 41 for draining the joint fluid in the body. The two liquid 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 the joint fluid can be controlled by the three-way valve 41. Specifically, one of the liquid outlet ends 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 liquid outlet end can drain the joint fluid through the drainage ball 43 for inspection and analysis of the joint fluid.

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

[0072] It should be pointed out that the inner diameter of the drainage tube is larger than the inner diameter of the injection tube, which can fully aspirate and guide the joint fluid.

[0073] At the same time, from the perspective that the drainage main tube 4 and the suction branch tube 6 can be smoothly pulled out, the suction branch tube 6 in this embodiment includes two forked drainage semicircular tubes, and the closed cross-section of the two drainage semicircular tubes is the same as the cross-sectional size of the drainage circular tube.

[0074] In this embodiment, a support bar 61 is provided in the middle of the drainage semicircular tube. The support bar 61 is used to separate the semicircular tube cavity of the drainage semicircular tube into two independent compartments 62, and suction and drainage can be performed through long incisions 63 respectively provided on the compartments 62.

[0075] Furthermore, the drainage semicircular tube includes a flat side wall and a curved side wall, and the long cutout 63 is arranged on the curved side wall. In order to form an effective drainage effect, the long cutout 63 extends axially along the support bar 61, and the long cutouts 63 on the two compartments 62 are symmetrically arranged with the support bar 61 as the center.

[0076] With this arrangement, the suction branch tube 6 can form a blood groove tube structure. The groove formed by the long incision 63 can ensure smooth outflow of joint fluid and prevent the problem of drainage tube blockage caused by early blood coagulation after surgery.

[0077] The long cutouts 63 symmetrically arranged with the support strip 61 as the center can form effective drainage slots and can widen the drainage range to ensure the suction drainage effect.

[0078] The hip and knee joint cavity perfusion and drainage device of the present invention can simplify the operation process, reduce replacement incisions, avoid infection links, ensure uniform perfusion 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, in the absence of conflict, the features in the embodiments of this application may be combined with each other.

[0080] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A hip and knee joint cavity perfusion and drainage device, characterized in that: It includes a drug delivery mechanism and a suction mechanism disposed outside the body; The drug administration mechanism is connected to a drug injection main pipe, and the suction mechanism is connected to a drainage main pipe, and the drug injection main pipe and the drainage main pipe respectively enter the body through a skin incision; The injection main tube is bifurcated after entering the body to form injection branches for insertion into the hip joint cavity or the knee joint cavity, and the injection branches are evenly distributed with injection holes; The main drainage tube is bifurcated after entering the body to form a suction branch tube for being placed in the hip joint cavity or the knee joint cavity.

2. The hip and knee joint cavity perfusion and drainage device according to claim 1, characterized in that: It also includes a wearing shell, and the drug delivery mechanism and the suction mechanism are installed on the wearing shell.

3. The hip and knee joint cavity perfusion and drainage device according to claim 1, characterized in that: The drug delivery mechanism comprises 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 perfusion and drainage device according to claim 3, characterized in that: The dosing pump is connected to the drug injection main pipe, and a control valve for controlling the amount of pumped drug solution is provided between the dosing pump and the drug injection main pipe.

5. The hip and knee joint cavity perfusion and drainage device according to claim 1, characterized in that: The drug injection main pipe comprises a drug injection circular tube located in the external part, the inner diameter of the tube cavity of the drug injection circular tube is 4-10mm, and the wall thickness is 0.8-1.2mm.

6. The hip and knee joint cavity perfusion and drainage device according to claim 5, characterized in that: The injection branch pipe comprises a bifurcated injection semicircular pipe, the injection holes are evenly spaced 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 drug injection semicircular tube comprises a plane side wall and a curved side wall, and the drug injection holes are staggered between the plane side wall and the curved side wall along the axial direction of the drug injection semicircular tube.

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

8. The hip and knee joint cavity perfusion and drainage device according to claim 1, characterized in that: The drainage main pipe comprises a drainage round pipe located in the external part, the drainage round pipe is connected to a three-way valve, and two liquid 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 circular tube is 8-16 mm, and the wall thickness is 0.8-1.2 mm.

9. The hip and knee joint cavity perfusion and drainage device according to claim 8, characterized in that: The suction branch tube comprises a drainage semicircular tube formed by bifurcation, and the closed cross-section of the drainage semicircular tube is the same as the cross-section size of the drainage circular tube.

10. The hip and knee joint cavity perfusion and drainage device according to claim 9, characterized in that: A support bar is provided in the middle of the drainage semicircular tube, and the support bar is used to separate the semicircular tube cavity of the drainage semicircular tube into two independent compartments; Each of the drainage semicircular tubes comprises a plane side wall and a curved side wall. The curved side wall is provided with a long cutout, which extends along the axial direction of the support bar. The long cutouts on the two compartments are symmetrically arranged with the support bar as the center.

Images