Kidney disease dialysis tube in-vitro fixing device

Abstract

The invention discloses a kidney disease dialysis tube in-vitro fixing device, and relates to the technical field of medical auxiliary instruments, the kidney disease dialysis tube in-vitro fixing device comprises a base body assembly used for being attached to the limbs or the waist and the abdomen of a patient, and placing a dialysis tube on the base body assembly; the tube body fixing assembly is arranged at the front end of the base body assembly and used for fixing and limiting the placed dialysis tube; the binding assemblies are arranged on the two sides of the base body assembly and used for binding the base body assembly to the limbs of a patient. The device comprises a furling box, a binding belt, a male buckle and a female buckle piece, wherein the female buckle piece buckles or releases the male buckle in a pressing mode; according to the technical scheme, the dialysis tube is buffered and fixed in a wrapping mode through the two sets of rubber rings, the whole device is bound and locked through the female fastener, and the flexible attaching structure and the composite structure type bandage on the device are combined, so that the requirements for stable fixing of the dialysis tube and comfortable wearing of a patient are effectively met; and safe and continuous dialysis treatment is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical auxiliary devices, in particular to a renal dialysis tube external fixation device. BACKGROUND

[0002] In the treatment of renal dialysis, the external stability and fixation of the dialysis tube is the core prerequisite for ensuring the continuity of treatment and reducing the risk of complications.

[0003] However, the mainstream adhesive tape fixing method, although simple to operate, has significant drawbacks: the adhesion of the adhesive tape is easily affected by sweat infiltration and limb movement friction, resulting in rapid decline, leading to frequent displacement and sliding of the dialysis tube, and even the risk of accidental slipping, especially for patients with unclear consciousness or greater activity, this problem is more prominent; at the same time, the components such as acrylate and rubber contained in the adhesive tape can easily cause delayed contact dermatitis, and the mild symptoms are redness and itching in the pasted area, and in severe cases, blisters, erosion and exudation can occur, and repeatedly tearing off the adhesive tape can also directly damage the skin epidermal barrier, causing mechanical laceration. Some devices that use single buckle fixation have simple locking structure design, mostly single clamping and limiting, lack of double protection mechanism, and are easy to come off when pulled by external force, and the clamping force on the dialysis tube during fixation cannot be accurately controlled, too tight can easily cause pipe wall extrusion damage, affecting blood or dialysate flow, and too loose cannot achieve effective fixation. In addition, the binding components of the existing fixing device mostly use ordinary elastic bands with magic tape or simple snap buckles, and the external force when the elastic band is pulled is directly transmitted to the dialysis tube and the puncture point, which can easily cause bleeding and pain at the puncture point, and also increase the risk of infection at the catheter outlet and tunnel, research data shows that improper fixation can significantly increase the incidence of peritonitis, seriously affecting the continuity of dialysis treatment.

[0004] In addition, most of the fixing devices use rigid plates or low-quality dressings, which cannot be fitted to the physiological curve of the human body limbs and waist, and long-term wearing can easily cause local tissue compression, and even cause pressure ulcers; low-quality dressings have poor air permeability and cannot discharge skin sweat in time, causing the local skin to be in a humid environment for a long time, further increasing the risk of skin irritation and infection; at the same time, the elastic band material is mostly a single elastic material, which is difficult to meet the needs of skin-friendly, high-strength tensile strength and sterilizability, such as pure elastic band with insufficient tensile strength, which is easy to break in daily activities, and pure cotton bandage does not have the characteristics of waterproof and sterilization, and is easy to get dirty and breed bacteria; and the length adjustment of the elastic band mostly depends on magic tape adhesion or manual cutting, the adhesion of the magic tape decreases after long-term use, and it is also easy to stick hair, and manual cutting cannot achieve precise fitting, too tight binding can easily cause poor blood circulation of the limbs, and too loose cannot guarantee the fixing effect, and it is difficult to adapt to the limb circumference and waist size of different patients. SUMMARY

[0005] The purpose of the present application is to provide a kidney dialysis tube extracorporeal fixation device to solve the problems of unreliable dialysis tube fixation, easy displacement, poor wearing comfort, easy skin problems, and complicated overall disassembly and binding installation in the prior art.

[0006] In order to achieve the above-mentioned purpose, the present application provides the following technical scheme: a kidney dialysis tube extracorporeal fixation device, comprising:

[0007] A base assembly is used to fit on the patient's limbs or waist and abdomen, and the dialysis tube is placed thereon;

[0008] A tube body fixing assembly is arranged at the front end of the base assembly and is used to fix and limit the placed dialysis tube;

[0009] A binding assembly is arranged on both sides of the base assembly and is used to bind the base assembly on the patient's limbs; it comprises a winding box, a binding belt, a male buckle, and a female buckle, and the female buckle is used to press the male buckle to be buckled or released.

[0010] Further, the base assembly further comprises a base disc, the rear end of which is covered with a silica gel pad, which is made of medical grade flexible silica gel and is used to fit on the patient's limbs or waist and abdomen; a disc body is fixedly arranged at the front end of the base disc, a placing groove is formed in the middle of the disc body from top to bottom, the placing groove is used to place the dialysis tube, and a slot is also formed on both sides of the disc body for inserting and placing the binding assembly.

[0011] Further, the tube body fixing assembly further comprises a first rubber ring arranged on the placing groove, a hinge is fixedly installed at the front end of the disc body, the hinge is located on one side of the placing groove, a pressure arc block is rotatably arranged on the hinge, a second rubber ring is arranged on the inner side of the arc of the pressure arc block, and a female buckle is arranged at the other end of the pressure arc block.

[0012] Further, the tube body fixing assembly is provided with two groups;

[0013] The first rubber ring and the second rubber ring are both arranged in a semicircular arc shape and are respectively fitted on the arc inner side of the placing groove and the pressure arc block, and the first rubber ring and the second rubber ring are both made of medical grade butyronitrile rubber;

[0014] The female buckle and the male buckle are used in cooperation and are buckled by pressing.

[0015] Further, the winding box of the binding assembly is provided with two, which are respectively inserted into the slots on both sides of the disc body, the winding box is used to automatically wind the binding belt, the binding belt is provided with two groups according to the winding box, and the male buckle and the female buckle are respectively installed at the tail of the two groups of binding belts.

[0016] Furthermore, the strap is made of medical-grade composite elastic material and consists of a three-layer composite structure. The inner layer is a skin contact layer made of medical-grade hypoallergenic spandex-cotton blend fabric; the middle layer is a tensile load-bearing layer made of medical-grade ultra-high molecular weight polyethylene fiber woven tape; and the outer layer is a wear-resistant protective layer covered with a medical-grade TPU film.

[0017] Furthermore, the female fastener also includes a housing, with a connecting shaft at the rear end of the housing for binding the end of the strap; a slider is slidably disposed within the housing cavity, the slider having a concave surface and a convex surface, a crank handle is movably mounted on the concave surface of the slider, and the convex surface of the slider provides limiting guidance to the crank handle; an inner cavity is formed inside the slider, an elastic element is fixedly installed at the bottom of the housing, the other end of the elastic element is fixedly installed in the inner cavity of the slider, elastic claws are fixedly installed on both sides of the top of the slider, and a guide plate is fixedly installed on the side of the inner cavity of the housing opposite to the concave surface for guiding the crank handle to engage or disengage, thereby limiting or releasing the slider; a limiting plate is also fixedly installed on the inner side of the housing, the limiting plate being located below the guide plate; a gap is provided between the guide plate and the limiting plate for assisting in guiding the lower end of the crank handle to move along the gap track.

[0018] Compared with the prior art, the external fixation device for dialysis catheters in kidney disease provided by the present invention has the following beneficial effects:

[0019] 1. By using double sets of semi-circular rubber rings to form a wrap-around buffer fixation, combined with a press-type concave and convex buckle locking mechanism, the press-type concave and convex buckles achieve quick locking, which not only prevents the dialysis catheter from shifting or sliding, but also prevents damage to the catheter wall from compression. The female fastener forms a double locking mechanism through elastic claw clamping and crank handle limiting structure, making the binding components firmly secure and preventing them from falling off. It can effectively absorb the pulling force of the dialysis catheter when the patient moves, reduce the impact on the puncture site, reduce the risk of complications such as bleeding and infection, and ensure the continuity of dialysis treatment.

[0020] 2. The medical-grade flexible silicone pad at the rear of the base plate conforms to the physiological curve of the skin, reducing local pressure; the three-layer composite strap combines low allergenicity and skin-friendliness, high tensile strength and sterilization properties, and can be flexibly adjusted in length with the automatic roll-up box to fit different patients' limb / waist and abdomen circumferences. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0022] Figure 1The overall structural schematic diagram provided for the embodiment of the present application is shown in the figure.

[0023] Figure 2 The base disc assembly and the pipe body fixing assembly structural schematic diagram provided for the embodiment of the present application is shown in the figure.

[0024] Figure 3 The binding assembly structural schematic diagram provided for the embodiment of the present application is shown in the figure.

[0025] Figure 4 The female fastener structural schematic diagram provided for the embodiment of the present application is shown in the figure.

[0026] Marked with the figure:

[0027] 100, base assembly; 101, base disc; 102, silica gel pad; 103, disc body; 104, placing groove; 105, insertion groove; 200, pipe body fixing assembly; 201, first rubber ring; 202, hinge; 203, arc pressing block; 204, second rubber ring; 205, female buckle; 206, male buckle; 300, binding assembly; 301, winding box; 302, binding belt; 303, male fastener; 304, female fastener; 304a, shell; 304b, connecting shaft; 304c, sliding block; 304d, crank; 304e, elastic member; 304f, elastic clamping jaw; 304g, guide piece; 304h, limiting piece. DETAILED DESCRIPTION

[0028] In order to make the skilled in the art better understand the technical solutions of the present application, the present application will be further described in detail below in combination with the drawings.

[0029] Embodiment one:

[0030] The present application provides a kidney disease dialysis pipe body external fixing device, as shown in the figure, comprising: Figure 1

[0031] The base assembly 100 is used for being attached on the patient's limbs or waist and abdomen and placing the dialysis pipe thereon;

[0032] The pipe body fixing assembly 200 is arranged at the front end of the base assembly 100 and is used for fixing and limiting the placed dialysis pipe;

[0033] The binding assembly 300 is arranged at both sides of the base assembly 100 and is used for binding the base assembly 100 on the patient's limbs; it comprises the winding box 301, the binding belt 302, the male fastener 303 and the female fastener 304, and the female fastener 304 adopts the pressing mode to buckle or release the male fastener 303.

[0034] As shown in the figure Figure 2 ​As shown, the base assembly 100 further comprises a base disc 101, the rear end of which is covered with a silica gel pad 102 made of medical-grade flexible silica gel for close placement on the patient's limbs or waist and abdomen; the front end of the base disc 101 is fixedly provided with a disc body 103, the middle part of which is provided with a placement groove 104 from top to bottom, which is used for placing the dialysis tube, and the two sides of the disc body 103 are also provided with insertion grooves 105 for inserting and placing the binding assembly 300. The silica gel pad 102 is directly attached to the patient's limbs or waist and abdomen skin, and the core function is to improve the wearing comfort and fit, and its flexible material can adapt to the physiological curve of the skin, reduce local compression; the low sensitization property avoids causing contact dermatitis, and at the same time has certain air permeability, reduces sweat accumulation, reduces the risk of skin stuffy discomfort, and indirectly improves the long-term tolerance of the device wearing. The disc body 103 is the installation carrier of the tube body fixing assembly 200 and the bearing structure of the dialysis tube, so that the layout of each component is compact, avoiding the inconvenience of installation caused by scattered parts, while ensuring that the distance between the dialysis tube fixing point and the skin puncture point is reasonable, reducing the impact of the dialysis tube pulling on the puncture point. The placement groove 104 is arc-shaped to adapt to the shape of the dialysis tube, which is used to accurately accommodate the dialysis tube, avoid the dialysis tube to be randomly displaced, provide a positioning basis for the tube body fixing assembly 200, and ensure that the pressing arc block 203 can form a surrounding fixation to the dialysis tube after pressing, thereby improving the fixing stability. The insertion groove 105 is used for inserting and fixing the winding box 301, realizing the detachable connection between the binding assembly 300 and the base assembly 100, which not only facilitates the installation, disassembly and replacement of the winding box 301, but also ensures the connection firmness of the winding box 301 and the disc body 103, avoiding the winding box 301 from falling off during the binding process.

[0035] At the same time, the placement groove 104 can be provided with two groups on the disc body 103, which is used to adapt to the double-tube mode of the double-lumen dialysis tube, and the double-tube mode is fixed by cooperating with the tube body fixing assembly 200.

[0036] The tube body fixing assembly 200 further comprises a first rubber ring 201 arranged on the placement groove 104, a hinge 202 fixedly installed at the front end of the disc body 103, the hinge 202 being located on one side of the placement groove 104, a pressing arc block 203 rotatably arranged on the hinge 202, a second rubber ring 204 arranged on the inner side of the arc of the pressing arc block 203, a recess buckle 205 arranged at the other end of the pressing arc block 203, and a convex buckle 206 fixedly installed on the other side of the placement groove 104.

[0037] The pipe body fixing assembly 200 is provided with two groups; the first rubber ring 201 and the second rubber ring 204 are both arranged in a semicircular arc shape and are respectively attached to the inner side of the arc of the placing groove 104 and the arc pressing block 203, and the first rubber ring 201 and the second rubber ring 204 are both made of medical-grade butyronitrile rubber; the concave buckle 205 is used in cooperation with the convex buckle 206 and is buckled by pressing. The first rubber ring 201 is attached to the inner side of the placing groove 104 in a semicircular arc shape and is made of medical-grade butyronitrile rubber, and the core function is to buffer the hard contact of the dialysis pipe with the placing groove 104, and the butyronitrile rubber has good elasticity and slip resistance, which can increase the friction with the dialysis pipe and prevent the dialysis pipe from sliding in the placing groove 104; at the same time, it can avoid the extrusion damage of the hard edge of the placing groove 104 to the pipe wall of the dialysis pipe, protect the integrity of the dialysis pipe, and has good biocompatibility and will not cause material allergy. The hinge 202 is used as the rotating fulcrum of the arc pressing block 203, so that the arc pressing block 203 can realize the opening and closing action around the hinge 202 to provide a convenient operation space for the placement and removal of the dialysis pipe, and the rotation damping is moderate, which can ensure the smooth opening and closing of the arc pressing block 203 and avoid the influence of random shaking on the fixing effect. The setting of the two groups of arc pressing blocks 203 on the single-way placing groove 104 can double the reinforcement of the single-cavity dialysis pipe and improve the adaptability. The semicircular arc of the second rubber ring 204 is attached to the inner side of the arc of the arc pressing block 203, and the material is the same as that of the first rubber ring 201, and it forms a wrapping buffer with the first rubber ring 201 to further enhance the anti-skid effect, and the double elastic buffer can absorb the pulling external force of the dialysis pipe when the patient moves, reduce the transmission of external force to the puncture point, and reduce the risk of bleeding and pain at the puncture point.

[0038] The arc structure of the arc pressing block 203 matches the placing groove 104, and the dialysis pipe is pressed and fixed by rotation, and the arc design can match the shape of the dialysis pipe to ensure that the dialysis pipe is evenly stressed during fixing and avoid excessive local pressure that causes the dialysis pipe to be blocked or the pipe wall to be damaged; the concave buckle 205 and the convex buckle 206 are used in cooperation and buckled by pressing, which is the locking structure of the arc pressing block 203; the concave buckle 205 is installed at the free end of the arc pressing block 203, and the convex buckle 206 is fixed on the other side of the placing groove 104; when the arc pressing block 203 is pressed, the concave buckle 205 and the convex buckle 206 are automatically engaged to quickly lock the arc pressing block 203 and ensure the firm fixation of the dialysis pipe; the arc pressing block 203 can be unlocked by pulling it lightly, which is convenient for medical staff to quickly adjust or remove the dialysis pipe, and the operation is convenient and the locking is reliable, which avoids accidental falling.

[0039] As shown in FIG. 1, the pipe body fixing assembly 200 is arranged on the dialysis pipe 100, and the pipe body fixing assembly 200 is arranged on the dialysis pipe 100. Figure 3As shown, the winding boxes 301 on the binding assembly 300 are provided with two, respectively inserted into the slots 105 on both sides of the disc body 103, and the winding boxes 301 are used for automatic winding of the binding belts 302. The binding belts 302 are provided with two groups according to the winding boxes 301, and the male buckle 303 and the female buckle 304 are respectively installed at the tail of the two groups of binding belts 302. The winding box 301 is a common winder, which is used to realize automatic winding and length adjustment of the binding belt 302.

[0040] The binding belt 302 adopts a medical-grade composite elastic material composed of three layers of composite structure. The inner layer is a skin contact layer, which adopts a medical-grade low-sensitization spandex-cotton blended fabric. It directly contacts the skin, and the low-sensitization property can reduce the risk of allergy. The air permeability and sweat absorption of cotton fiber can avoid skin heat and humidity, and the elasticity of spandex can adapt to different limb circumference, improving the wearing comfort. The middle layer is a tensile load-bearing layer, which adopts a medical-grade ultra-high molecular weight polyethylene fiber woven belt, which is used to provide high-strength tensile performance to withstand the tensile force of daily activities, avoid the rupture of the binding belt 302, and ensure the reliability of the binding. The outer layer is a wear-resistant protective layer covered with a medical-grade TPU film, which has the characteristics of waterproof, wear-resistant and sterilizable. It can be sterilized by wiping with alcohol and other disinfectants to prevent the binding belt 302 from being stained with dirt and breeding bacteria, and at the same time, prolong the service life of the binding belt 302.

[0041] The male buckle 303 and the female buckle 304 are respectively installed at the tail of the two groups of binding belts 302, which are the locking mechanism of the binding assembly 300. The fixing and binding of the base assembly 100 are realized by the buckling of the two, which is simple in structure and firm in buckling, ensuring that the device will not fall off from the patient's limbs or waist and abdomen, and at the same time, it is convenient for the patient or medical staff to quickly wear and disassemble.

[0042] Example two:

[0043] This embodiment is basically the same as the previous embodiment, the difference is that, as shown in FIG. 6, the binding assembly 300 is provided with a plurality of winding boxes 301, and the winding boxes 301 are respectively inserted into the slots 105 on both sides of the disc body 103. Figure 4As shown, the female fastener 304 further comprises a housing 304a, the housing 304a is provided with a connecting shaft 304b at the rear end for binding the tail end of the strap 302; a sliding block 304c is slidingly arranged in the inner cavity of the housing 304a, the sliding block 304c is provided with a concave surface and a convex surface, a crank 304d is movably mounted on the concave surface of the sliding block 304c, and the convex surface of the sliding block 304c guides and limits the crank 304d; an inner cavity is formed in the sliding block 304c, an elastic member 304e is fixedly installed at the bottom of the housing 304a, the elastic member 304e is a reset spring, the other end of the elastic member 304e is fixedly installed in the inner cavity of the sliding block 304c, and elastic clamping jaws 304f are fixedly installed on the top of the sliding block 304c; a guide piece 304g is fixedly installed on one side of the concave surface in the inner cavity of the housing 304a, for guiding the crank 304d to be clamped or separated, so that the sliding block 304c is limited or released; a limiting piece 304h is further fixedly installed on the inner side of the housing 304a, and the limiting piece 304h is located below the guide piece 304g; a gap is arranged between the guide piece 304g and the limiting piece 304h, for assisting in guiding the lower end of the crank 304d to move along the gap track. The top of the sliding block 304c is used to bear the pressing force of the male fastener 303, and when it moves downward, it can drive the elastic clamping jaws 304f to move synchronously; the concave surface on the sliding block 304c provides a space for movably mounting the crank 304d, and the convex surface limits the rotation range of the crank 304d to avoid deviation from the preset track; the inner cavity in the sliding block 304c is used to accommodate and fix the elastic member 304e, so that the extension direction of the elastic member 304e is consistent with the sliding direction of the sliding block 304c, and the precise reset of the sliding block 304c is realized.

[0044] When the male fastener 303 is buckled, the lower end of the crank 304d moves along the guide piece 304g and falls into the gap track, and the upper end of the crank 304d is limited from moving upward by the abutting of the lower end of the guide piece 304g, thereby indirectly maintaining the closing state of the elastic clamping jaws 304f; when the male fastener 303 is unlocked, the lower end of the crank 304d moves downward with the sliding block 304c and slides out of the gap track, thereby releasing the limitation of the sliding block 304c, so that the sliding block 304c is reset under the action of the elastic member 304e; the rotation design of the upper end of the crank 304d is adapted to different operation forces, so that the male fastener 303 can be driven to move by the pressing action of the male fastener 303 without additional complex operation. When the sliding block 304c moves downward, the outer side of the elastic clamping jaws 304f contacts the inner side of the opening of the housing 304a, and gradually closes under the guidance of the inner wall of the housing 304a, thereby realizing the clamping of the male fastener 303; when the sliding block 304c moves upward, the elastic clamping jaws 304f are released from the constraint of the inner wall of the housing 304a, and automatically open to release the male fastener 303.

[0045] When buckling, the guide piece 304g moves along the edge of the guide handle 304d to ensure that the handle 304d is accurately placed in the gap track between the guide piece 304g and the limiting piece 304h; when unlocking, the lower end of the guide handle 304d smoothly slides out of the gap track to avoid jamming; the arc surface structure at the lower end of the guide piece 304g can stably abut with the lower end of the handle 304d, limiting the rotation of the handle 304d when the slider 304c is lifted, thereby locking the position of the slider 304c and ensuring the continuous clamping state of the elastic clamping piece 304f; the limiting piece 304h has the following effects: first, it standardizes the movement path of the lower end of the handle 304d to avoid offsetting the handle 304d and causing limiting failure; second, it provides support for the lower end of the handle 304d to ensure that the lower end of the handle 304d can be stably clamped in the track when buckling, thereby enhancing the stability of the limiting structure; third, by designing the distance between the guide piece 304g and the limiting piece 304h, the rotation angle of the handle 304d is controlled to make the cooperation between the handle 304d and the slider 304c accurate and controllable, thereby avoiding excessive rotation and affecting subsequent unlocking operation.

[0046] When the male buckle 303 is pressed into the shell 304a, the male buckle 303 abuts against the top of the slider 304c, causing the slider 304c to move into the inner cavity of the shell 304a. At this time, the elastic clamping piece 304f is opened and moves downward with the slider 304c, and the outer side of the elastic clamping piece 304f gradually contacts the inner side of the opening of the shell 304a, causing the elastic clamping pieces 304f on both sides to gradually close and clamp the male buckle 303. At the same time, during the downward movement of the slider 304c, the lower end of the handle 304d contacts the guide piece 304g and moves along the edge thereof, and at this time, the upper end of the handle 304d rotates. When the lower end of the handle 304d falls into the gap track between the guide piece 304g and the limiting piece 304h along the guide piece 304g, the pressing external force of the male buckle 303 is released, the slider 304c is lifted under the action of the elastic member 304e, and at this time, the lower end of the handle 304d is positioned at the arc surface at the lower end of the guide piece 304g, causing the slider 304c as a whole to be limited by the handle 304d and unable to move upward, resulting in that the elastic clamping piece 304f is still in the closed clamping state, thereby completing the buckling of the male buckle 303 and the female buckle 304, and enabling the binding strap 302 to be bound. When it is necessary to separate the male buckle 303 and the female buckle, the pressing force of the male buckle 303 is applied again, causing the slider 304c to press the elastic member 304e, at which time the lower end of the handle 304d moves downward synchronously and slides out of the gap track, releasing the applied force on the male buckle 303, and the slider 304c is reset under the elastic force, causing the elastic clamping piece 304f to be separated from the shell 304a and opened, thereby releasing the clamping of the male buckle 303 and completing the unlocking.

[0047] The foregoing merely illustrates some exemplary embodiments of the application, and no doubt numerous modifications and alterations thereto will be apparent to those skilled in the art. Accordingly, the above description is intended for purposes of illustration only and should not be construed as limiting the scope of the application.

Claims

1. An external fixation device for dialysis catheters in kidney disease, characterized in that, include: A base component (100) is used to fit onto the patient's limb or lower abdomen and to place the dialysis tubing thereon; A tube fixing assembly (200) is disposed at the front end of the base assembly (100) and is used to fix and limit the placement of the dialysis tube; A binding component (300) is disposed on both sides of the base component (100) for binding the base component (100) to the patient's limb; it includes a retractable box (301), a strap (302), a male buckle (303) and a female buckle (304), wherein the female buckle (304) is used to fasten or release the male buckle (303) by pressing.

2. The external fixation device for a dialysis catheter in kidney disease according to claim 1, characterized in that, The base assembly (100) also includes a base plate (101), the rear end of which is covered with a silicone pad (102). The silicone pad (102) is made of medical-grade flexible silicone and is used to fit and be placed on the patient's limbs or waist and abdomen. A plate body (103) is fixedly provided at the front end of the base plate (101). A placement groove (104) is opened from top to bottom in the middle of the plate body (103). The placement groove (104) is used to place the dialysis tube. Slots (105) are also opened on both sides of the plate body (103) for inserting and placing the binding assembly (300).

3. The external fixation device for a dialysis catheter in kidney disease according to claim 2, characterized in that, The tube fixing assembly (200) also includes a first rubber ring (201) disposed on the placement groove (104), a hinge (202) is fixedly installed at the front end of the disc (103), the hinge (202) is located on one side of the placement groove (104), an arc-pressing block (203) is rotatably disposed on the hinge (202), a second rubber ring (204) is disposed on the inner side of the arc of the arc-pressing block (203), a recessed buckle (205) is provided at the other end of the arc-pressing block (203), and a protruding buckle (206) is fixedly installed on the other side of the placement groove (104).

4. The external fixation device for a dialysis catheter in kidney disease according to claim 3, characterized in that, The tube fixing assembly (200) is provided in two sets; The first rubber ring (201) and the second rubber ring (204) are both set in a semi-circular arc shape, respectively fitting the inner arc of the placement groove (104) and the arc pressing block (203). The first rubber ring (201) and the second rubber ring (204) are both made of medical grade nitrile rubber. The concave buckle (205) and the convex buckle (206) are used together and fastened by pressing.

5. The external fixation device for a dialysis catheter in kidney disease according to claim 2, characterized in that, The binding component (300) has two winding boxes (301), which are respectively inserted into the slots (105) on both sides of the disc body (103). The winding boxes (301) are used to automatically wind up the binding straps (302). The binding straps (302) are provided in two sets according to the winding boxes (301). The male buckle (303) and the female buckle (304) are respectively installed at the tail of the two sets of binding straps (302).

6. The external fixation device for a dialysis catheter in kidney disease according to claim 5, characterized in that, The strap (302) is made of medical-grade composite elastic material and consists of a three-layer composite structure. The inner layer is a skin contact layer made of medical-grade low-allergenic spandex-cotton blended fabric; the middle layer is a tensile load-bearing layer made of medical-grade ultra-high molecular weight polyethylene fiber woven tape; and the outer layer is a wear-resistant protective layer covered with a medical-grade TPU film.

7. The external fixation device for a dialysis catheter in kidney disease according to claim 5, characterized in that, The female fastener (304) also includes a housing (304a), the rear end of which is provided with a connecting shaft (304b) for binding the tail end of the strap (302); a slider (304c) is slidably disposed in the inner cavity of the housing (304a), the slider (304c) is provided with a concave surface and a convex surface, a crank (304d) is movably mounted on the concave surface of the slider (304c), and the convex surface of the slider (304c) limits and guides the crank (304d); an inner cavity is opened inside the slider (304c), and an elastic element (304e) is fixedly installed at the bottom of the housing (304a), the other end of the elastic element (304e) is fixedly installed on... Inside the inner cavity of the slider (304c), elastic claws (304f) are fixedly installed on both sides of the top of the slider (304c). A guide plate (304g) is fixedly installed on the side of the inner cavity of the housing (304a) opposite to the concave surface, which is used to guide the crank handle (304d) to engage or disengage, so that the slider (304c) is limited or released. A limiting piece (304h) is also fixedly installed inside the housing (304a), which is located below the guide piece (304g). A gap is provided between the guide piece (304g) and the limiting piece (304h), which is used to assist in guiding the lower end of the crank handle (304d) to move along the gap track.

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