Protective device capable of protecting central venous catheter for hemodialysis and method thereof

Abstract

The invention relates to the technical field of venous catheter protection, in particular to a protective device and method capable of protecting a central venous catheter for hemodialysis, the device comprises a controller and a processing box, bandages are symmetrically arranged on the processing box, a telescopic part is arranged in the processing box, and a first protective assembly is arranged on the inner side wall of the processing box; a driving rack is coaxially and fixedly connected to an output shaft of the telescopic piece, and a transmission assembly is arranged on the driving rack. A second protection assembly and a limiting assembly are further arranged on the inner side wall of the treatment box. And an adjusting assembly is arranged on the treatment box. The method comprises the following steps: step 1, skin cleaning; secondly, a guide pipe is installed; and step 3, fixing the conduit. By means of the double protection design of the first protection assembly and the second protection assembly, the central venous catheter can be effectively fixed and protected, the risk that the catheter is displaced, disengaged or damaged due to external pulling or moving is reduced, and therefore the safety of the hemodialysis process is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of venous catheter protection, and in particular to a protection device and a method thereof capable of protecting a central venous catheter for hemodialysis. Background Art

[0002] With the widespread application of hemodialysis technology in diseases such as end-stage renal disease, central venous catheters, as important vascular access, are becoming increasingly common. However, during use, catheters are prone to many risks such as infection, displacement, thrombosis, and accidental pulling, which not only affects the dialysis effect but may also cause serious complications, increase patient pain and medical costs. In this case, protective devices that can protect central venous catheters used for hemodialysis have emerged. They are designed to improve the safety and comfort of dialysis for patients, meet clinical needs, and promote the development of hemodialysis in a safer and more efficient direction.

[0003] Although existing protective devices for central venous catheters used in hemodialysis can protect the catheter to a certain extent, they still have some shortcomings in their anti-displacement capabilities. When the patient moves or changes body position, the catheter may still shift or fall out.

[0004] In summary, the existing protective devices for protecting central venous catheters for hemodialysis still have some deficiencies in anti-displacement ability, which has become a difficult problem that needs to be solved urgently in this field. Therefore, it is necessary to propose a protective device and method for protecting central venous catheters for hemodialysis. Summary of the Invention

[0005] To solve the above problems, the present invention provides a protective device and method for protecting a central venous catheter for hemodialysis. Through the dual protection design of a first protective component and a second protective component, the central venous catheter can be effectively fixed and protected, reducing the risk of catheter displacement, detachment or damage due to external pulling or movement, thereby improving the safety of the hemodialysis process.

[0006] In order to achieve the above-mentioned purpose, the technical solution of the present invention is as follows: A protective device for protecting a central venous catheter for hemodialysis includes a controller and a processing box, a strap is symmetrically fixedly connected to one side of the processing box, a telescopic part is fixedly connected to the inner wall of the processing box, the controller is used to control the extension and retraction of the output shaft of the telescopic part, and a first protective component for protecting the venous catheter is provided on the inner wall of the processing box.

[0007] A driving rack is coaxially fixedly connected to the output shaft of the telescopic member. The driving rack is provided with a transmission component for transmitting the driving force of the output shaft of the telescopic member to the first protection component.

[0008] A second protection component is also provided on the inner side wall of the processing box for further protecting the intravenous catheter, and the transmission component is also used to transmit the driving force of the output shaft of the telescopic member to the second protection component.

[0009] The processing box is provided with an adjustment component for adjusting the position of the second protective component, and the adjustment component is located on one side of the second protective component; the inner wall of the processing box is also provided with a limiting component for limiting the driving rack, and the limiting component is located below the first protective component.

[0010] The technical principles of the above solution are as follows:

[0011] Medical personnel attach the protective device to the patient's limb using a strap. A controller controls the extension of the telescopic output shaft, which drives the drive rack to move laterally. This drive rack then drives the transmission assembly, which in turn drives the first protective assembly to initially secure the IV catheter. Simultaneously, the transmission assembly also drives the second protective assembly, which works in tandem with the first to further secure the IV catheter, achieving a multi-point fixation effect. During this process, the drive rack is restrained by the limiter assembly.

[0012] When the fixed point needs to be adjusted, the medical staff can adjust the position of the second protective component through the adjustment component, thereby adjusting the fixed point of the second protective component to achieve adjustment of the fixed point.

[0013] The above scheme has the following beneficial effects:

[0014] 1. The present invention, through the dual protection design of the first protection component and the second protection component, can effectively fix and protect the central venous catheter, reduce the risk of catheter displacement, dislocation or damage due to external pulling or movement, and thus improve the safety of the hemodialysis process.

[0015] 2. The design of the adjustment component of the present invention enables the position of the second protective component to be adjusted, thereby enabling the protective device to adapt to patients of different body shapes or different catheter placement positions, thereby enhancing the versatility and personalized adaptability of the protective device.

[0016] 3. The present invention limits the travel of the driving rack by means of a limit assembly, thereby effectively preventing mechanical failure or damage caused by excessive displacement, and improving the service life and safety of the protective device.

[0017] Furthermore, the transmission assembly includes a fixed frame symmetrically fixed to the inner wall of the treatment box. A transmission shaft is mounted on the fixed frame. The ends of the transmission shaft extend through the adjacent fixed frame and rotate with the fixed frame. A helical gear, a drive gear, and a guard gear are fixedly connected to the transmission shaft from top to bottom. The drive gear meshes with the drive rack.

[0018] Beneficial effects: The helical gear and the protective gear on the transmission shaft can respectively drive the first protective component and the second protective component to operate, and ensure that they can operate simultaneously, thereby improving the operational consistency of the protective device.

[0019] Furthermore, the first protection component includes a fixed cylinder fixedly connected to the inner wall of the processing box, a threaded rod is laterally slidably fitted in the fixed cylinder, a through hole is opened in the side wall of the fixed cylinder, and the bevel gear engages with the threaded rod through the through hole.

[0020] One end of the threaded rod is coaxially rotated and matched with an extension rod, and the extension rod is laterally slidingly matched with the inner wall of the fixed cylinder. A stabilizing block is symmetrically fixedly connected to the side wall of the extension rod, and a stabilizing groove is symmetrically opened on the inner wall of the fixed cylinder. The stabilizing blocks are all located in the stabilizing grooves adjacent to them and are laterally sliding matched with the stabilizing grooves; a through groove is opened on the side wall of the processing box, and the extension rod extends to the outside of the processing box through the through groove and is fixedly connected to the first support block, and the first support block is symmetrically fixedly connected to the first elastic block on the side away from the extension rod.

[0021] Beneficial effect: The extension rod slides in the fixed tube and is limited and guided by the stabilizing blocks and stabilizing grooves on both sides, which effectively prevents the extension rod from deflecting or getting stuck during movement, thereby improving the stability of the protective device.

[0022] Furthermore, the second protective component includes a sliding platform that slides laterally with the bottom wall of the processing box, and a protective rack is fixedly connected to the side wall of the sliding platform, and the protective rack is engaged with the protective gear; a sliding rod is slided laterally with the side wall of the sliding platform, and an extension block is fixedly connected to the side of the sliding rod away from the sliding platform, and the extension block extends away from one end of the sliding rod through the through groove to the outside of the processing box and is fixedly connected to a second support block, and the second support block is symmetrically fixedly connected to the side of the second support block away from the extension block.

[0023] Beneficial effects: The meshing design of the protective rack and the protective gear enables the second protective component to work in conjunction with the first protective component to jointly complete the clamping or release of the catheter, achieving multi-point collaborative clamping, improving the stability of catheter fixation, and reducing the deviation or damage caused by single-point force.

[0024] Furthermore, the adjustment assembly includes a push-pull rod fixedly connected to one side of the sliding rod, an adjustment groove is opened on the side wall of the processing box, the push-pull rod is located in the adjustment groove and slides horizontally in the adjustment groove, and the push-pull rod extends away from the sliding rod through the adjustment groove to the outside of the processing box and is fixedly connected to an adjustment block.

[0025] Beneficial effects: The push-pull rod extends to the outside of the processing box through the adjustment slot and is fixedly connected to the adjustment block. This design allows medical staff to manually adjust the position of the second protective component directly from the outside without opening the protective device, thereby improving the operational convenience and real-time adjustment capability of the protective device, enabling it to adapt to different catheter directions and placement positions.

[0026] Furthermore, the limiting assembly includes a plurality of limiting frames fixedly connected to the inner side wall of the processing box, the limiting frames are all located in the movement path of the driving rack, and the driving rack and the limiting frames are all slidably matched.

[0027] Beneficial effect: The limit frame limits the movement path of the driving rack, ensuring that it can only move in a predetermined direction, avoiding the deviation of the driving rack due to external factors, and thereby improving the clamping accuracy of the first protective component and the second protective component.

[0028] Furthermore, the sliding rod is L-shaped.

[0029] Beneficial effects: The L-shaped sliding rod design provides the sliding rod with additional support points and contact surfaces, thereby increasing the contact area between the sliding rod and the sliding table, thereby improving the stability and load-bearing capacity of the overall structure.

[0030] Furthermore, a method for protecting a central venous catheter for hemodialysis comprises the following steps:

[0031] Step 1: Skin cleaning: After the medical staff determines the planned installation location of the catheter, they use disinfectant to clean the patient's skin at the planned installation location of the catheter 2-3 times.

[0032] Step 2: Catheter installation: Perform local anesthesia on the patient's skin at the predetermined puncture point, and install the catheter at the predetermined point by puncture.

[0033] Step 3: Fixing the catheter: Install the protective device at the catheter puncture site, and fix the catheter at multiple points through the first protective component and the second protective component in the protective device.

[0034] Beneficial effects: In step one, cleaning the puncture site 2-3 times can effectively kill bacteria, fungi and other microorganisms on the surface and shallow layer of the patient's skin, significantly reducing the incidence of local or systemic infection after surgery; in step two, local anesthesia of the puncture site can reduce the pain felt by the patient during the catheterization process, improving patient compliance and satisfaction; in step three, the design of multi-point flexible clamping and fixing of the catheter by the first and second protective components of the protective device can effectively prevent the catheter from shifting, twisting or even falling out due to external force, position changes or patient activities, thereby improving the safety and stability of the central venous catheter during hemodialysis.

[0035] Furthermore, in step one, the disinfectant is selected from one or more of iodine tincture and chlorhexidine.

[0036] Beneficial effects: Povidone-iodine is a broad-spectrum iodine-containing fungicide that has a good killing effect on bacteria, fungi, viruses and spores; chlorhexidine is a cationic surfactant that has a strong inhibitory effect on Gram-positive bacteria, Gram-negative bacteria and certain fungi. Using povidone-iodine and chlorhexidine as disinfectants can expand the antibacterial spectrum, enhance the killing and inhibition capabilities of different types of pathogens, and reduce the risk of infection.

[0037] Furthermore, in step one, when cleaning the patient's skin, the cleaning range is centered on the predetermined puncture point of the catheter, and the cleaning diameter is no less than 10-15 cm.

[0038] Beneficial effect: Since microorganisms on the skin surface are not only present in a very small range around the puncture point, but are distributed over a certain area, the design of expanding the cleaning range to a diameter greater than 10-15 cm with the predetermined puncture point as the center can effectively remove pathogens on the skin surface.

[0039] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 This is an axonometric schematic diagram of a protective device for protecting a central venous catheter for hemodialysis according to the present invention.

[0041] Figure 2 This is an axonometric diagram of the internal structure of the protective device of the present invention that can protect the central venous catheter for hemodialysis.

[0042] Figure 3 The figure is a side view schematic diagram of the internal structure of the protective device of the present invention that can protect the central venous catheter for hemodialysis.

[0043] Figure 4 The figure is a side cross-sectional view of a fixing cylinder in a protective device for protecting a central venous catheter for hemodialysis according to the present invention.

[0044] Figure 5 The figure is a schematic diagram of the steps of the protection method for protecting a central venous catheter for hemodialysis according to the present invention.

[0045] The figure marks in the drawings of the specification include: 1. processing box; 2. binding belt; 3. driving rack; 4. fixing frame; 5. bevel gear; 6. driving gear; 7. protective gear; 8. fixing cylinder; 9. threaded rod; 10. extension rod; 11. stabilizing block; 12. first support block; 13. first elastic block; 14. sliding table; 15. protective rack; 16. sliding rod; 17. extension block; 18. second support block; 19. second elastic block; 20. push-pull rod; 21. adjustment block; 22. limit frame. DETAILED DESCRIPTION

[0046] The following is further described in detail through specific implementation methods:

[0047] Example 1:

[0048] As attached Figure 1 、 Figure 2 、 Figure 3 and Figure 4 The figure shows a protective device for a central venous catheter used in hemodialysis, comprising a controller and a treatment box 1. A first protective assembly for protecting the venous catheter is provided on the inner wall of the treatment box 1. A bandage 2 is symmetrically bonded to one side of the treatment box 1. A telescopic member is bolted to the inner wall of the treatment box 1. The controller controls the extension and retraction of the telescopic member's output shaft. A drive rack 3 is coaxially bolted to the telescopic member's output shaft. The drive rack 3 is provided with a transmission assembly for transmitting the driving force of the telescopic member's output shaft to the first protective assembly. In this embodiment, the telescopic member utilizes an electric telescopic rod.

[0049] The transmission assembly includes a fixed frame 4 symmetrically welded to the inner wall of the processing box 1. A transmission shaft is mounted on the fixed frame 4. The ends of the transmission shaft extend through the adjacent fixed frame 4 and rotate with the fixed frame 4. A helical gear 5, a drive gear 6, and a protective gear 7 are coaxially fixed to the transmission shaft from top to bottom. The drive gear 6 meshes with the drive rack 3.

[0050] Specifically, since the output shaft of the electric telescopic rod is fixedly connected to the drive rack 3 with bolts, the bevel gear 5, the drive gear 6 and the protective gear 7 are coaxially fixed on the transmission shaft from top to bottom, and the drive gear 6 is engaged with the drive rack 3. Therefore, when the output shaft of the electric telescopic rod is extended, it can drive the drive rack 3 to move laterally, and then the drive rack 3 drives the drive gear 6 to rotate, and the drive gear 6 drives the bevel gear 5 and the protective gear 7 to rotate together with it through the transmission shaft.

[0051] The first protection assembly includes a fixed cylinder 8 welded to the inner wall of the processing box 1. A threaded rod 9 is laterally slidably fitted in the fixed cylinder 8. A through hole is opened in the side wall of the fixed cylinder 8, and the bevel gear 5 engages with the threaded rod 9 through the through hole.

[0052] One end of the threaded rod 9 is coaxially rotated with an extension rod 10, and the extension rod 10 is laterally slidingly engaged with the inner wall of the fixed cylinder 8. A stabilizing block 11 is symmetrically integrally formed on the side wall of the extension rod 10, and a stabilizing groove is symmetrically opened on the inner wall of the fixed cylinder 8. The stabilizing blocks 11 are all located in the adjacent stabilizing grooves and are laterally slidingly engaged with the stabilizing grooves.

[0053] A through slot is formed on the side wall of the processing box 1 , and the extension rod 10 extends through the through slot to the outside of the processing box 1 and is integrally formed with a first support block 12 . A first elastic block 13 is symmetrically fixed and bonded to one side of the first support block 12 away from the extension rod 10 .

[0054] Specifically, because the threaded rod 9 is meshed with the bevel gear 5 and laterally slides with the fixed cylinder 8, when the bevel gear 5 rotates, it can drive the threaded rod 9 to move laterally. Furthermore, because the threaded rod 9 and the extension rod 10 are coaxially rotated, the extension rod 10 and the stabilizing block 11 are integrally formed, and the stabilizing blocks 11 are located in adjacent stabilizing grooves and laterally slide with the stabilizing grooves, when the threaded rod 9 moves laterally, it can drive the extension rod 10 to move laterally with it, and the extension rod 10 is restrained by the restraining action of the stabilizing block 11 and the stabilizing groove, so that the extension rod 10 sequentially drives the first support block 12 and the first elastic block 13 to move laterally, thereby initially clamping the intravenous catheter.

[0055] A second protection component is also provided on the inner wall of the processing box 1 for further protecting the intravenous catheter, and the transmission component is also used to transmit the driving force of the output shaft of the electric telescopic rod to the second protection component.

[0056] The second protection assembly includes a sliding platform 14 that is laterally slidably fitted on the bottom wall of the processing box 1 . A protection rack 15 is welded on the side wall of the sliding platform 14 , and the protection rack 15 is engaged with the protection gear 7 .

[0057] An L-shaped sliding rod 16 is laterally slidably engaged on the side wall of the sliding table 14. An extension block 17 is integrally formed on the side of the sliding rod 16 away from the sliding table 14. The extension block 17 extends from one end of the sliding rod 16 to the outside of the processing box 1 through a through groove and is integrally formed with a second support block 18. A second elastic block 19 is symmetrically fixed and bonded to the side of the second support block 18 away from the extension block 17.

[0058] Specifically, since the protective rack 15 is engaged with the protective gear 7 and is welded to the side wall of the sliding platform 14, when the protective gear 7 rotates, the sliding platform 14 can be driven to move laterally via the protective rack 15. Furthermore, since the sliding rod 16 is located on the sliding platform 14 and slides laterally with the sliding platform 14, when the sliding platform 14 moves laterally, it can drive the sliding rod 16 to move laterally with it. The sliding rod 16 then drives the second support block 18 and the second elastic block 19 to move laterally in turn, further clamping the intravenous catheter, so that it cooperates with the first support block 12 and the first elastic block 13 to form a multi-point stable clamping mode.

[0059] The processing box 1 is provided with an adjusting component for adjusting the position of the second protection component, and the adjusting component is located on one side of the second protection component.

[0060] The adjustment assembly includes a push-pull rod 20 welded to one side of the sliding rod 16. An adjustment groove is opened on the side wall of the processing box 1. The push-pull rod 20 is located in the adjustment groove and slides horizontally in the adjustment groove. The push-pull rod 20 extends away from the sliding rod 16 at one end through the adjustment groove to the outside of the processing box 1 and is integrally formed with an adjustment block 21.

[0061] Specifically, since the push-pull rod 20 is welded to the sliding rod 16, an adjustment groove is opened on the side wall of the processing box 1, and the push-pull rod 20 is located in the adjustment groove and slides horizontally with the adjustment groove. Therefore, when the medical staff presses or pushes the push-pull rod 20 through the adjustment block 21, the push-pull rod 20 can drive the sliding rod 16 to move horizontally, and then drive the extension block 17, the second support block 18 and the second elastic block 19 to move horizontally, thereby realizing the adjustment of the clamping position.

[0062] A limiting component for limiting the driving rack 3 is also provided on the inner wall of the processing box 1, and the limiting component is located below the first protective component.

[0063] The limiting assembly includes a plurality of limiting frames 22 welded to the inner wall of the processing box 1. The limiting frames 22 are all located in the movement path of the driving rack 3. The driving rack 3 and the limiting frames 22 are in sliding fit.

[0064] Specifically, since the limiting frames 22 are located in the movement path of the driving rack 3, the movement path of the driving rack 3 will be limited by the limiting frames 22, thereby reducing the deviation of the driving rack 3 caused by external factors, thereby improving the stability of the protective device.

[0065] The specific implementation process is as follows: the medical staff installs the protective device on the patient's limb through the strap 2, and controls the output shaft of the electric telescopic rod to extend, which drives the drive rack 3 to move horizontally, and the drive rack 3 drives the drive gear 6 to rotate, and the drive gear 6 drives the bevel gear 5 and the protective gear 7 to rotate. During this process, the drive rack 3 will be limited by the limit frame 22.

[0066] During the rotation process, the bevel gear 5 drives the threaded rod 9 to move laterally, and the threaded rod 9 drives the extension rod 10 to move laterally under the limiting action of the stabilizing block 11 and the stabilizing groove, so that the extension rod 10 drives the first support block 12 and the first elastic block 13 to move laterally, thereby preliminarily clamping the intravenous catheter.

[0067] During the rotation process, the protective gear 7 drives the sliding platform 14 to move horizontally through the protective rack 15, which in turn drives the sliding rod 16, the extension block 17, the second support block 18 and the second elastic block 19 to move horizontally along the width direction of the processing box 1, thereby clamping the intravenous catheter at multiple points.

[0068] When the clamping point needs to be adjusted, the medical staff presses or stretches the adjustment block 21, which drives the sliding rod 16, the extension block 17, the second support block 18 and the second elastic block 19 to move laterally along the length direction of the processing box 1 to adjust the clamping position.

[0069] The present invention, through the dual protection design of the first protection component and the second protection component, can effectively fix and protect the central venous catheter, reduce the risk of catheter displacement, dislocation or damage due to external pulling or movement, and thus improve the safety of the hemodialysis process.

[0070] Example 2:

[0071] As attached Figure 5 As shown, the difference from Example 1 is that a protection method for protecting a central venous catheter for hemodialysis includes the following steps:

[0072] Step 1: Skin Cleansing: The healthcare provider first determines the intended catheter installation location. Then, they clean the patient's skin at the intended catheter installation location two to three times using iodine tincture. During this process, the cleaning center is the intended catheter puncture point, and the cleaning diameter is no less than 15 cm. In this embodiment, the cleaning diameter is 18 cm.

[0073] Step 2: Catheter installation: After completing the cleaning operation on the patient's skin, the medical staff will perform local anesthesia on the patient and inject the anesthetic into the patient's skin through the predetermined puncture point. After the anesthetic takes effect, the medical staff will install the catheter at the predetermined puncture point on the patient's skin through puncture.

[0074] Step 3: Catheter fixation: After completing the installation of the catheter, the medical staff will install the protective device at the catheter puncture site to fix it to the patient's limb, and simultaneously start the protective device to perform multi-point fixation operations on the catheter through the first protective component and the second protective component, forming a multi-point clamping catheter protection mechanism.

[0075] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A protective device for protecting a central venous catheter for hemodialysis, comprising a treatment box (1), a strap (2) symmetrically fixedly connected to one side of the treatment box (1), characterized in that: The processing box (1) further comprises a controller, a telescopic member is fixedly connected to the inner wall of the processing box (1), the controller is used to control the telescopic movement of the output shaft of the telescopic member, and a first protective component for protecting the intravenous catheter is provided on the inner wall of the processing box (1); A drive rack (3) is coaxially fixedly connected to the telescopic member output shaft, and a transmission assembly for transmitting the driving force of the telescopic member output shaft to the first protection assembly is provided on the drive rack (3); A second protection component for further protecting the intravenous catheter is also provided on the inner side wall of the processing box (1), and the transmission component is also used to transmit the driving force of the output shaft of the telescopic member to the second protection component; The processing box (1) is provided with an adjustment component for adjusting the position of the second protection component, and the adjustment component is located on one side of the second protection component; the processing box (1) is also provided with a limiting component for limiting the driving rack (3) on the inner side wall, and the limiting component is located below the first protection component.

2. The protective device for protecting a central venous catheter for hemodialysis according to claim 1, characterized in that: The transmission assembly comprises a fixing frame (4) symmetrically fixedly connected to the inner wall of the processing box (1), a transmission shaft is provided on the fixing frame (4), and both ends of the transmission shaft respectively pass through the adjacent fixing frame (4) and extend to the outside of the fixing frame (4) to rotate with the fixing frame (4); A helical gear (5), a driving gear (6) and a protection gear (7) are fixedly connected to the transmission shaft in sequence from top to bottom, and the driving gear (6) is meshed with the driving rack (3).

3. The protective device for protecting a central venous catheter for hemodialysis according to claim 2, characterized in that: The first protection component comprises a fixed cylinder (8) fixedly connected to the inner wall of the processing box (1), a threaded rod (9) is laterally slidably fitted in the fixed cylinder (8), a through hole is opened in the side wall of the fixed cylinder (8), and the bevel gear (5) is engaged with the threaded rod (9) through the through hole; One end of the threaded rod (9) is coaxially rotated with an extension rod (10), the extension rod (10) is laterally slidably engaged with the inner side wall of the fixed cylinder (8), a stabilizing block (11) is symmetrically fixedly connected to the side wall of the extension rod (10), the inner side wall of the fixed cylinder (8) is symmetrically provided with stabilizing grooves, and the stabilizing blocks (11) are all located in the stabilizing grooves adjacent thereto and laterally slidably engaged with the stabilizing grooves; a through groove is provided on the side wall of the processing box (1), the extension rod (10) extends through the through groove to the outside of the processing box (1) and is fixedly connected to a first support block (12), and the first support block (12) is symmetrically fixedly connected to a first elastic block (13) on the side away from the extension rod (10).

4. The protective device for protecting a central venous catheter for hemodialysis according to claim 3, characterized in that: The second protection component includes a sliding platform (14) that is laterally slidably engaged with the inner bottom wall of the processing box (1), a protection rack (15) is fixedly connected to the side wall of the sliding platform (14), and the protection rack (15) is engaged with the protection gear (7); a sliding rod (16) is laterally slidably engaged with the side wall of the sliding platform (14), and the sliding rod (16) is fixedly connected to an extension block (17) on the side away from the sliding platform (14), and the extension block (17) is extended to the outside of the processing box (1) through a through groove at one end away from the sliding rod (16) and is fixedly connected to a second support block (18), and the second support block (18) is symmetrically fixedly connected to a second elastic block (19) on the side away from the extension block (17).

5. The protective device for protecting a central venous catheter for hemodialysis according to claim 4, characterized in that: The adjustment assembly includes a push-pull rod (20) fixedly connected to one side of the sliding rod (16); an adjustment groove is opened on the side wall of the processing box (1); the push-pull rod (20) is located in the adjustment groove and slides with the adjustment groove in a transverse direction; one end of the push-pull rod (20) away from the sliding rod (16) extends through the adjustment groove to the outside of the processing box (1) and is fixedly connected to an adjustment block (21).

6. The protective device for protecting a central venous catheter for hemodialysis according to claim 5, characterized in that: The limiting assembly includes a plurality of limiting frames (22) fixedly connected to the inner wall of the processing box (1), the limiting frames (22) are all located in the movement path of the driving rack (3), and the driving rack (3) and the limiting frames (22) are both slidably matched.

7. The protective device for protecting a central venous catheter for hemodialysis according to claim 6, characterized in that: The sliding rod (16) is L-shaped.

8. A method for protecting a central venous catheter for hemodialysis, implemented based on the protective device for protecting a central venous catheter for hemodialysis according to any one of claims 1 to 7, characterized in that: The following steps are involved: Step 1: Skin cleaning: After the medical staff determines the intended installation location of the catheter, they use disinfectant to clean the patient's skin at the intended installation location of the catheter 2-3 times; Step 2: Catheter installation: Local anesthesia is performed on the patient's skin at the predetermined puncture point, and the catheter is installed at the predetermined point by puncture; Step 3: Fixing the catheter: Install the protective device at the catheter puncture site, and fix the catheter at multiple points through the first protective component and the second protective component in the protective device.

9. The method for protecting a central venous catheter for hemodialysis according to claim 8, wherein: In step 1, the disinfectant is selected from one or more of iodine tincture and chlorhexidine.

10. The method for protecting a central venous catheter for hemodialysis according to claim 9, wherein: In step 1, when cleaning the patient's skin, the cleaning range is centered on the predetermined puncture point of the catheter, and the cleaning diameter is no less than 10-15 cm.

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