Hemodialysis catheter fixing device

Abstract

The invention provides a hemodialysis catheter fixing device, and belongs to the technical field of medical instruments. Comprising a base and a fixing bandage arranged on the base, a plurality of catheter clamping assemblies are arranged on the upper surface of the base in a sliding mode, and the catheter clamping assemblies are used for positioning and fixing hemodialysis catheters; the catheter clamping assembly comprises an upper fixing seat and a lower fixing seat which can be opened, a first groove is formed in the lower surface of the upper fixing seat, and a movable plate is arranged on the inner top wall of the first groove through an up-down adjusting assembly. According to the hemodialysis catheter fixing device, the base is stably fixed through the fixing binding band, the multiple catheter clamping assemblies are arranged on the base, and adsorption type fixing of the outer wall of a hemodialysis catheter which is soft in texture is achieved through the first adsorption parts and the two second adsorption parts in the catheter clamping assemblies by means of the suction force of gas; therefore, the hemodialysis catheter cannot contract inwards at the adsorption fixing part, and the normal flowing effect of the hemodialysis catheter is guaranteed.

Description

Technical Field

[0001] This invention belongs to the field of medical device technology, specifically relating to a hemodialysis catheter fixation device. Background Technology

[0002] Hemodialysis is a crucial treatment for end-stage renal disease, playing a vital role in maintaining patients' lives and improving their quality of life. During hemodialysis, the hemodialysis catheter, as the key link between the patient's blood and the dialysis equipment, is critical; its stability and reliability directly affect the smooth progress of the treatment. Catheter displacement or detachment not only interrupts dialysis but can also lead to complications such as bleeding and infection, seriously threatening the patient's life and health.

[0003] Existing methods for securing hemodialysis catheters mainly include using gauze, tape, and splints. However, the adhesiveness of gauze or tape is easily affected by factors such as patient sweating and skin oil secretion, leading to insecure fixation and easy catheter displacement or dislodgement. Patent No. CN 223627935U discloses a fixing structure for the interface of a hemodialysis catheter. When this fixing structure uses a splint for fixation, because the hemodialysis catheter is a flexible tube, the clamping force of the splint can deform the tube, thereby hindering the normal flow of fluid and affecting the flow effect. Summary of the Invention

[0004] (1) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, the present invention aims to provide a hemodialysis catheter fixation device. This addresses the problems of existing hemodialysis catheter fixation methods, which mainly include the use of gauze, tape, and splints. However, when using gauze or tape, the adhesiveness is easily affected by factors such as patient sweating and skin oil secretion, resulting in unreliable fixation and easy displacement or detachment of the catheter. When using splints for fixation, it hinders the normal flow of fluid and affects the flow effect.

[0006] (2) Technical solution

[0007] To solve the above-mentioned technical problems, the present invention provides a hemodialysis catheter fixing device, including a base and a fixing strap disposed on the base. A plurality of catheter clamping assemblies are slidably disposed on the upper surface of the base, and the catheter clamping assemblies are used for positioning and fixing the hemodialysis catheter.

[0008] The catheter clamping assembly includes an upper fixing seat and an openable lower fixing seat. The lower surface of the upper fixing seat has a first groove. The inner top wall of the first groove is provided with a movable plate via an up-down adjustment assembly. The lower surface of the movable plate is equipped with a first suction member. The upper surface of the lower fixing seat has a second groove. Two second suction members are installed on the left and right sides of the bottom wall of the second groove. A vacuum assembly is provided on the right side of the upper surface of the base. The vacuum assembly is used to fix the hemodialysis catheter with the first suction member and the two second suction members. An upper limit seat is provided on the left side of the movable plate. A lower limit seat is slidably provided on the left side of the lower fixing seat. An adjustment sleeve is provided on the upper limit seat and the lower limit seat. The adjustment sleeve is used to adjust the inner diameter of the upper limit seat and the lower limit seat.

[0009] Preferably, the rear side of the upper fixed seat is rotatably connected to the lower fixed seat via a hinge, a connecting seat is fixedly connected to the front side of the upper fixed seat, a positioning screw is threaded onto the connecting seat, a positioning groove is provided on the front side of the lower fixed seat, and the other end of the positioning screw is located in the positioning groove.

[0010] Preferably, the up-down adjustment assembly includes a lead screw threaded to the upper fixed seat, a handle fixedly connected to the top end of the lead screw, a rotatable connection between the bottom end of the lead screw and a movable plate, and slide rods fixedly connected to the left and right sides of the upper surface of the movable plate, the top end of the slide rods penetrating the upper fixed seat, and the slide rods slidably connected to the upper fixed seat.

[0011] Preferably, the first adsorption element includes a first fixing tube fixedly connected to the lower surface of the movable plate, and a plurality of corrugated first suction cups are installed on the lower surface of the first fixing tube.

[0012] Preferably, the second adsorption element includes two second fixing tubes fixedly connected to the bottom wall of the second groove, the two second fixing tubes are connected, a plurality of corrugated second suction cups are installed on the upper surface of the second fixing tubes, and the second fixing tubes are connected to the first fixing tubes through corrugated tubes.

[0013] Preferably, the vacuum assembly includes a fixed box fixedly connected to the upper surface of the base. The interior of the fixed box is formed by a partition to create a vacuum chamber and a movable chamber. An exhaust valve communicating with the vacuum chamber and a first one-way valve communicating with the movable chamber are installed on the outer surface of the fixed box. A second one-way valve is installed on the partition. A piston is slidably connected inside the movable chamber. A pressing rod is fixedly connected to the front of the piston. The front of the fixed box communicates with the movable chamber through a through hole. The second fixed pipe communicates with the vacuum chamber through a pipe.

[0014] Preferably, the upper limit seat includes an upper arc-shaped plate fixedly connected to the left side of the movable plate, and multiple upper limit rods are fixedly connected to the left circumference of the upper arc-shaped plate. The lower limit seat includes a lower arc-shaped plate, and multiple lower limit rods are fixedly connected to the left circumference of the lower arc-shaped plate. A fixing rod is fixedly connected to the bottom end of the lower arc-shaped plate. Two vertical rods are fixedly connected to the bottom left side of the lower fixing seat. The top end of the vertical rod passes through the fixing rod and is fixedly connected to a limit block. The vertical rod and the fixing rod are slidably connected. A first spring is sleeved on the outer surface of the bottom end of the vertical rod. Both the upper limit rod and the lower limit rod are bent. The adjusting sleeve is threadedly connected to the right outer surface of the upper limit rod and the lower limit rod. A ring of inclined blocks is fixedly connected to the left inner wall of the adjusting sleeve.

[0015] Preferably, a soft pad, made of rubber, is fixedly connected to the left side of both the upper limit rod and the lower limit rod.

[0016] Preferably, a movable block is fixedly connected to the lower surface of the lower fixed base, an installation groove is provided on the upper surface of the base, a plurality of guide rods are fixedly connected to the left inner wall of the installation groove, the other end of the guide rod passes through the movable block and is fixedly connected to the right inner wall of the installation groove, the guide rod is slidably connected to the movable block, and a second spring is sleeved on the left outer surface of the guide rod.

[0017] Preferably, the fixing straps include a front fixing strap and a rear fixing strap fixedly connected to the front and rear sides of the base, and the ends of the front fixing strap and the rear fixing strap that are close to each other are fitted with Velcro.

[0018] Beneficial effects

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] In the above solution, the base is firmly fixed by a fixing strap, and multiple catheter clamping components are set on the base. The first suction element and two second suction elements in the catheter clamping components use the suction force of the gas to achieve suction fixation of the soft outer wall of the hemodialysis catheter, so as not to cause the hemodialysis catheter to contract inward at the suction fixation site, thus ensuring the normal flow effect of the hemodialysis catheter.

[0021] The above solution effectively limits the range of motion around the hemodialysis catheter by setting an upper limit seat and a lower limit seat, and by using an adjusting sleeve to adjust the inner diameter. This prevents the suction cup from falling off due to excessive pulling and ensures the stability of the hemodialysis catheter during operation.

[0022] In the above solution, by sliding the catheter clamping assembly on the upper surface of the base, when the left side of the hemodialysis catheter is pulled, the upper fixing seat, the lower fixing seat, and the movable block can slide along the guide rod and compress the second spring in the mounting groove of the base, thereby providing cushioning and preventing the hemodialysis catheter from falling off. Attached Figure Description

[0023] Figure 1 A left-side three-dimensional structural diagram of a hemodialysis catheter fixation device.

[0024] Figure 2 For fixing devices for hemodialysis catheters Figure 1 A magnified structural diagram of point A in the middle.

[0025] Figure 3 This is a right-side enlarged structural diagram of a hemodialysis catheter fixation device.

[0026] Figure 4 For fixing devices for hemodialysis catheters Figure 3 A magnified structural diagram at point B in the middle.

[0027] Figure 5 This is a front view schematic diagram of the hemodialysis catheter fixation device.

[0028] Figure 6 For fixing devices for hemodialysis catheters Figure 5 A schematic diagram of the cross-sectional structure at point BB.

[0029] Figure 7 For fixing devices for hemodialysis catheters Figure 5 A schematic diagram of the cross-sectional structure at point AA.

[0030] Figure 8 This is a schematic diagram of the lower fixation seat of a hemodialysis catheter fixation device.

[0031] The labels in the attached diagram are as follows: 1. Base; 2. Fixing strap; 3. Guide tube clamping assembly; 4. Upper fixing seat; 5. Lower fixing seat; 6. First groove; 7. Up and down adjustment assembly; 8. Movable plate; 9. First suction element; 10. Second groove; 11. Second suction element; 12. Vacuum assembly; 13. Upper limit seat; 14. Lower limit seat; 15. Adjusting sleeve; 401. Hinge; 402. Connecting seat; 403. Positioning screw; 404. Positioning groove; 701. Lead screw; 702. Handle; 703. Slide rod; 901. First fixing tube; 902. First suction cup; 1101. Second fixing tube; 1102. Second suction cup; 1103. Corrugated pipe; 1201. Fixing box; 1202. 1203. Partition plate; 1204. Vacuum chamber; 1205. Movable chamber; 1206. Exhaust valve; 1207. First one-way valve; 1208. Piston; 1209. Pressing rod; 12000. Through hole; 1210. Pipe; 1211. Second one-way valve; 1301. Upper arc plate; 1302. Upper limit rod; 1401. Lower arc plate; 1402. Lower limit rod; 1403. Fixing rod; 1404. Vertical rod; 1405. Limiting block; 1406. First spring; 1407. Soft pad; 1501. Inclined block; 501. Movable block; 502. Mounting groove; 503. Guide rod; 504. Second spring; 201. Front fixing strap; 202. Rear fixing strap; 203. Velcro.

[0032] As shown in the figure, specific structures and devices are labeled in the figure to clearly illustrate the structure of the embodiments of the present invention. However, this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. Those skilled in the art can adjust or modify these devices and environments according to specific needs, and such adjustments or modifications are still included in the scope of the appended claims. Detailed Implementation

[0033] An embodiment of the present invention provides a hemodialysis catheter fixing device, including a base 1 and a fixing strap 2 disposed on the base 1. A plurality of catheter clamping components 3 are slidably disposed on the upper surface of the base 1, and the catheter clamping components 3 are used to position and fix the hemodialysis catheter.

[0034] The catheter clamping assembly 3 includes an upper fixing base 4 and an openable lower fixing base 5. A first groove 6 is formed on the lower surface of the upper fixing base 4. A movable plate 8 is provided on the inner top wall of the first groove 6 via an up-and-down adjustment assembly 7. A first suction member 9 is installed on the lower surface of the movable plate 8. A second groove 10 is formed on the upper surface of the lower fixing base 5. Two second suction members 11 are installed on the left and right sides of the inner bottom wall of the second groove 10. A vacuum assembly 12 is provided on the right side of the upper surface of the base 1. The vacuum assembly 12 is used to fix the hemodialysis catheter with the first suction member 9 and the two second suction members 11, allowing blood to be dialyzed. After the hemodialysis catheter is placed in the second groove 10 of the lower fixing seat 5, the hemodialysis catheter is located on the second suction cup 1102 of the two second suction members 11. A triangular structure is formed by the first suction member 9. The height of the first suction member 9 is adjusted by the upper and lower adjustment component 7 to facilitate the adsorption and fixation of hemodialysis catheters of different sizes. An upper limit seat 13 is provided on the left side of the movable plate 8, and a lower limit seat 14 is slidably provided on the left side of the lower fixing seat 5. An adjustment sleeve 15 is provided on the upper limit seat 13 and the lower limit seat 14. The adjustment sleeve 15 is used to adjust the inner diameter of the upper limit seat 13 and the lower limit seat 14.

[0035] like Figure 1 and Figure 6 As shown, in this embodiment, the rear side of the upper fixing seat 4 is rotatably connected to the lower fixing seat 5 via a hinge 401. A connecting seat 402 is fixedly connected to the front side of the upper fixing seat 4, and a positioning screw 403 is threaded onto the connecting seat 402. A positioning groove 404 is provided on the front side of the lower fixing seat 5, and the other end of the positioning screw 403 is located in the positioning groove 404. In this way, the positioning screw 403 is loosened and disengaged from the positioning groove 404. Then, the upper fixing seat 4 and the upper limit seat 13 are opened around the hinge 401, which facilitates the placement of the hemodialysis catheter in the second groove 10 of the lower fixing seat 5.

[0036] like Figure 1 and Figure 6 As shown, in this embodiment, the up-down adjustment assembly 7 includes a lead screw 701 threadedly connected to the upper fixed seat 4. A handle 702 is fixedly connected to the top end of the lead screw 701, and the bottom end of the lead screw 701 is rotatably connected to the movable plate 8. Slide rods 703 are fixedly connected to both the left and right sides of the upper surface of the movable plate 8. The top end of the slide rod 703 passes through the upper fixed seat 4, and the slide rod 703 is slidably connected to the upper fixed seat 4. By rotating the handle 702, the lead screw 701 is driven to rotate. During the rotation, the lead screw 701 can drive the movable plate 8 and the first suction member 9 to move downward until the first suction cup 902 on the first suction member 9 is attached to the upper surface of the hemodialysis catheter.

[0037] like Figure 4 and Figure 6As shown, in this embodiment, the first adsorption member 9 includes a first fixing tube 901 fixedly connected to the lower surface of the movable plate 8, and a plurality of corrugated first suction cups 902 are installed on the lower surface of the first fixing tube 901; the second adsorption member 11 includes two second fixing tubes 1101 fixedly connected to the bottom wall of the second groove 10, the two second fixing tubes 1101 are connected, and a plurality of corrugated second suction cups 1102 are installed on the upper surface of the second fixing tube 1101. The second fixing tube 1101 is connected to the first fixing tube 901 through a corrugated tube 1103; in this way, the first fixing tube 901 and the two second fixing tubes 1101 can be connected, the corrugated tube 1103 can withstand negative pressure and has the ability to bend, so that the upper fixing seat 4 and the upper limit seat 13 can be opened around the hinge 401, and the corrugated suction cups can be better adsorbed on the surface of the hemodialysis catheter.

[0038] like Figure 3 and Figure 7 As shown, in this embodiment, the vacuum assembly 12 includes a fixed box 1201 fixedly connected to the upper surface of the base 1. The interior of the fixed box 1201 is formed by a partition 1202, creating a vacuum chamber 1203 and a movable chamber 1204. An exhaust valve 1205 communicating with the vacuum chamber 1203 and a first one-way valve 1206 communicating with the movable chamber 1204 are installed on the outer surface of the fixed box 1201. A second one-way valve 1211 is installed on the partition 1202. A piston 1207 is slidably connected within the movable chamber 1204, and the front of the piston 1207 is fixedly connected to… There is a pressing rod 1208. The front of the fixed box 1201 is connected to the movable chamber 1204 through the through hole 1209. The second fixed tube 1101 is connected to the vacuum chamber 1203 through the pipe 1210. When the pressing rod 1208 is pulled repeatedly to drive the piston 1207 to slide in the movable chamber 1204, the piston 1207, during the repeated sliding process, forms a vacuum in the vacuum chamber 1203 through the cooperation of the first one-way valve 1206 and the second one-way valve 1211. When not in use, the exhaust valve 1205 can be opened to allow air to enter and the hemodialysis catheter can be removed.

[0039] like Figure 1 and Figure 2As shown, in this embodiment, the upper limit seat 13 includes an upper arc-shaped plate 1301 fixedly connected to the left side of the movable plate 8. Multiple upper limit rods 1302 are fixedly connected to the left circumference of the upper arc-shaped plate 1301. The lower limit seat 14 includes a lower arc-shaped plate 1401. Multiple lower limit rods 1402 are fixedly connected to the left circumference of the lower arc-shaped plate 1401. A fixing rod 1403 is fixedly connected to the bottom end of the lower arc-shaped plate 1401. Two vertical rods 1404 are fixedly connected to the bottom left side of the lower fixed seat 5. The top of each vertical rod 1404 passes through the fixing rod 1403 and is fixedly connected to a limit block 1405. The vertical rod 1404 is slidably connected to the fixing rod 1403. A first spring 1406 is sleeved on the outer surface of the bottom end of the vertical rod 1404. The upper limit rods 1302 and the lower limit rods 1402... Both are bent. The adjusting sleeve 15 is threaded to the outer right side of the upper limit rod 1302 and the lower limit rod 1402. A ring of inclined blocks 1501 is fixedly connected to the inner left side of the adjusting sleeve 15. A soft pad 1407 made of rubber is fixedly connected to the left side of both the upper limit rod 1302 and the lower limit rod 1402. The upper arc plate 1301 and the lower arc plate 1401 have grooves on the side that are close to each other, which can pass through the hemodialysis catheter. By rotating the adjusting sleeve 15, the inclined blocks 1501 squeeze the upper limit rod 1302 and the lower limit rod 1402, so that their left side is slightly attached to the surface of the hemodialysis catheter. When the left side of the hemodialysis catheter is pulled, the upper limit seat 13 and the lower limit seat 14 restrict the range of motion of the hemodialysis catheter in all directions to prevent it from falling off the suction cup.

[0040] like Figure 4 , Figure 5 and Figure 8 As shown, in this embodiment, a movable block 501 is fixedly connected to the lower surface of the lower fixed seat 5, and an installation groove 502 is provided on the upper surface of the base 1. A plurality of guide rods 503 are fixedly connected to the left inner wall of the installation groove 502. The other end of the guide rod 503 passes through the movable block 501 and is fixedly connected to the right inner wall of the installation groove 502. The guide rod 503 is slidably connected to the movable block 501, and a second spring 504 is sleeved on the left outer surface of the guide rod 503. In this way, the upper fixed seat 4, the lower fixed seat 5, and the movable block 501 slide along the guide rod 503 and compress the second spring 504 in the installation groove 502 of the base 1, thereby providing buffering and preventing the hemodialysis catheter from falling off. When the external force disappears, the restoring force of the second spring 504 resets the upper fixed seat 4 and the lower fixed seat 5.

[0041] like Figure 1 and Figure 3 As shown, in this embodiment, the fixing straps include a front fixing strap 201 and a rear fixing strap 202 fixedly connected to the front and rear sides of the base 1. The ends of the front fixing strap 201 and the rear fixing strap 202 that are close to each other are equipped with Velcro 203. The base 1 is fixed by the two fixing straps, which makes the installation very convenient.

[0042] The technical solution provided by this invention involves first placing the adjusting sleeve 15 onto the hemodialysis catheter during drainage, and then fixing the base 1 with the fixing strap 2. When fixing the hemodialysis catheter, first loosen the positioning screw 403 to disengage it from the positioning groove 404, then open the upper fixing seat 4 and the upper limit seat 13 around the hinge 401. Next, place the hemodialysis catheter in the second groove 10 of the lower fixing seat 5. At this time, the hemodialysis catheter is located on the second suction cups 1102 of the two second suction members 11, and simultaneously in the groove of the lower arc plate 1401. Then, close the... Adjust sleeve 15 and tighten positioning screw 403. Then, turn handle 702 to drive lead screw 701 to rotate. During the rotation of lead screw 701, it can drive movable plate 8 and first suction member 9 to move downward until the first suction cup 902 on the first suction member 9 is attached to the upper surface of the hemodialysis catheter. At the same time, during the movement of movable plate 8, it can drive upper limit seat 13 to move downward. During the movement of upper limit seat 13, it can cause lower limit seat 14 to slide downward along vertical rod 1404 and compress first spring 1406, so that upper limit seat 13 and lower limit seat 14... The inner wall of the seat 14 is concentric with the hemodialysis catheter. Then, the adjusting sleeve 15 is rotated, causing the inclined block 1501 to press the upper limit rod 1302 and the lower limit rod 1402, so that its left side is slightly attached to the surface of the hemodialysis catheter. Then, the pressing rod 1208 is repeatedly pulled to drive the piston 1207 to slide in the movable chamber 1204. During the repeated sliding process, the piston 1207, through the cooperation of the first one-way valve 1206 and the second one-way valve 1211, creates a vacuum in the vacuum chamber 1203. Through the pipe 1210 and the bellows 1103, the first suction cup 902 is... The second suction cup 1102 adsorbs and fixes the hemodialysis catheter. When the left side of the hemodialysis catheter is pulled, the upper limit seat 13 and the lower limit seat 14 restrict the range of motion of the hemodialysis catheter in all directions to prevent it from falling off the suction cup. At the same time, the upper fixing seat 4, the lower fixing seat 5 and the movable block 501 can slide along the guide rod 503 and compress the second spring 504 in the mounting groove 502 of the base 1 to buffer and prevent the hemodialysis catheter from falling off. When the external force disappears, the restoring force of the second spring 504 resets the upper fixing seat 4 and the lower fixing seat 5.

[0043] This invention encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this invention. To provide the public with a thorough understanding of this invention, specific details have been described in detail in the above preferred embodiments; however, those skilled in the art will fully understand the invention even without these details. Furthermore, to avoid unnecessary misunderstanding of the essence of this invention, well-known methods, processes, procedures, components, and circuits have not been described in detail.

[0044] Those skilled in the art will understand that all or part of the steps in the methods of the above embodiments can be implemented by a program instructing related hardware. The program can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc.

[0045] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A hemodialysis catheter securement device, comprising: It includes a base (1) and a fixing strap (2) provided on the base (1). Several catheter clamping assemblies (3) are slidably provided on the upper surface of the base (1). The catheter clamping assemblies (3) are used to position and fix the hemodialysis catheter. The catheter clamping assembly (3) includes an upper fixing seat (4) and an openable lower fixing seat (5). The lower surface of the upper fixing seat (4) has a first groove (6). The inner top wall of the first groove (6) is provided with a movable plate (8) through an up-down adjustment assembly (7). The lower surface of the movable plate (8) is equipped with a first suction member (9). The upper surface of the lower fixing seat (5) has a second groove (10). Two second suction members (11) are installed on the left and right sides of the inner bottom wall of the second groove (10). The base (1) A vacuum assembly (12) is provided on the right side of the upper surface of the device. The vacuum assembly (12) is used to fix the first adsorption element (9) and two second adsorption elements (11) to the hemodialysis catheter. An upper limit seat (13) is provided on the left side of the movable plate (8). A lower limit seat (14) is slidably provided on the left side of the lower fixed seat (5). An adjustment sleeve (15) is provided on the upper limit seat (13) and the lower limit seat (14). The adjustment sleeve (15) is used to adjust the inner diameter of the upper limit seat (13) and the lower limit seat (14).

2. The hemodialysis catheter fixation device according to claim 1, characterized in that, The rear side of the upper fixed seat (4) is rotatably connected to the lower fixed seat (5) via a hinge (401). A connecting seat (402) is fixedly connected to the front side of the upper fixed seat (4). A positioning screw (403) is threaded onto the connecting seat (402). A positioning groove (404) is provided on the front side of the lower fixed seat (5). The other end of the positioning screw (403) is located in the positioning groove (404).

3. The hemodialysis catheter fixation device according to claim 2, characterized in that, The up-down adjustment assembly (7) includes a lead screw (701) threaded onto the upper fixed seat (4), a handle (702) fixedly connected to the top end of the lead screw (701), the bottom end of the lead screw (701) being rotatably connected to the movable plate (8), and slide rods (703) fixedly connected to both the left and right sides of the upper surface of the movable plate (8), the top end of the slide rod (703) penetrating through the upper fixed seat (4), and the slide rod (703) being slidably connected to the upper fixed seat (4).

4. The hemodialysis catheter fixation device according to claim 3, characterized in that, The first adsorption component (9) includes a first fixing tube (901) fixedly connected to the lower surface of the movable plate (8), and a plurality of corrugated first suction cups (902) are installed on the lower surface of the first fixing tube (901).

5. The hemodialysis catheter fixation device according to claim 4, characterized in that, The second adsorption component (11) includes two second fixing tubes (1101) fixedly connected to the bottom wall of the second groove (10). The two second fixing tubes (1101) are connected. Multiple corrugated second suction cups (1102) are installed on the upper surface of the second fixing tube (1101). The second fixing tube (1101) is connected to the first fixing tube (901) through a corrugated tube (1103).

6. The hemodialysis catheter fixation device according to claim 5, characterized in that, The vacuum assembly (12) includes a fixed box (1201) fixedly connected to the upper surface of the base (1). The interior of the fixed box (1201) is formed by a partition (1202) to form a vacuum chamber (1203) and a movable chamber (1204). An exhaust valve (1205) communicating with the vacuum chamber (1203) and a first one-way valve (1206) communicating with the movable chamber (1204) are installed on the outer surface of the fixed box (1201). A second one-way valve (1211) is installed on the partition (1202). A piston (1207) is slidably connected in the movable chamber (1204). A pressing rod (1208) is fixedly connected to the front of the piston (1207). The front of the fixed box (1201) is connected to the movable chamber (1204) through a through hole (1209). The second fixed tube (1101) is connected to the vacuum chamber (1203) through a pipe (1210).

7. The hemodialysis catheter fixation device according to claim 6, characterized in that, The upper limit seat (13) includes an upper arc-shaped plate (1301) fixedly connected to the left side of the movable plate (8). Multiple upper limit rods (1302) are fixedly connected to the left circumference of the upper arc-shaped plate (1301). The lower limit seat (14) includes a lower arc-shaped plate (1401). Multiple lower limit rods (1402) are fixedly connected to the left circumference of the lower arc-shaped plate (1401). A fixing rod (1403) is fixedly connected to the bottom end of the lower arc-shaped plate (1401). Two vertical rods (1404) are fixedly connected to the bottom left end of the lower fixing seat (5). The top of the vertical rod (1404) passes through the fixed rod (1403) and is fixedly connected to the limiting block (1405). The vertical rod (1404) is slidably connected to the fixed rod (1403). A first spring (1406) is sleeved on the outer surface of the bottom end of the vertical rod (1404). The upper limit rod (1302) and the lower limit rod (1402) are both bent. The adjusting sleeve (15) is threadedly connected to the outer right side of the upper limit rod (1302) and the lower limit rod (1402). A ring of inclined blocks (1501) is fixedly connected to the inner left side of the adjusting sleeve (15).

8. The hemodialysis catheter fixation device according to claim 7, characterized in that, The upper limit rod (1302) and the lower limit rod (1402) are both fixedly connected to a soft pad (1407) on their left sides. The soft pad (1407) is made of rubber.

9. The hemodialysis catheter fixation device according to claim 1, characterized in that, The lower surface of the lower fixed seat (5) is fixedly connected to a movable block (501), and the upper surface of the base (1) is provided with an installation groove (502). Multiple guide rods (503) are fixedly connected to the left inner wall of the installation groove (502). The other end of the guide rod (503) passes through the movable block (501) and is fixedly connected to the right inner wall of the installation groove (502). The guide rod (503) is slidably connected to the movable block (501), and a second spring (504) is sleeved on the left outer surface of the guide rod (503).

10. The hemodialysis catheter fixation device according to claim 9, characterized in that, The fixing strap (2) includes a front fixing strap (201) and a rear fixing strap (202) fixedly connected to the front and rear sides of the base (1). The front fixing strap (201) and the rear fixing strap (202) are each fitted with Velcro (203) at their closest ends.

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