A catheter fixation device

Abstract

This invention belongs to the field of medical catheter technology, specifically a catheter fixation device, including an arm sleeve. An airbag is fixedly connected to the inner ring of the arm sleeve, and a catheter positioning component is disposed on the arm sleeve. The catheter positioning component includes a grooved plate fixedly connected to one side of the outer ring of the arm sleeve, with clamping blocks slidably connected to both sides of the groove. A sweat-absorbing component is also disposed on the arm sleeve. The sweat-absorbing component includes a rotating ring rotatably disposed within the inner cavity of the arm sleeve, with a support block fixedly connected to one side of the rotating ring. This invention utilizes the sweat-absorbing component to absorb excessive sweat secretion at the point where the patient's skin contacts the airbag. This is achieved by driving the moisture-absorbing roller to adhere to the patient's skin, thus avoiding excessive sweat secretion caused by the airbag pressing against the patient's arm, which can lead to skin redness, itching, and eczema.

Description

Technical Field

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

[0002] A catheter is a hollow, tubular medical device used to establish a channel between the human body and external equipment or different internal parts to achieve functions such as delivery, drainage, or monitoring of liquids, gases, or drugs. Because catheters need to remain stable during medical procedures to prevent displacement, dislodgement, or damage, they must be secured during use.

[0003] Patent CN118767247B discloses a catheter care and fixation device for intravenous therapy, including an arm sleeve. A catheter guide and clamping mechanism is fixedly mounted on the upper end of the arm sleeve, and a pressure fixing mechanism is fixedly mounted on the arm sleeve. A pressure confirmation mechanism, communicating with the pressure fixing mechanism, is also fixedly mounted on the outer wall of the arm sleeve. This patent prevents the catheter from shifting due to pulling forces, thus avoiding significant impact on the patient. It allows for intermittent ventilation and dehumidification between the arm sleeve and the patient's arm, preventing excessive sweating caused by the arm sleeve pressing against the patient's arm, which can lead to redness, itching, and eczema. The ventilation and dehumidification intervals are automatically adjusted based on the patient's arm size, allowing for more frequent ventilation and dehumidification for patients with larger arms.

[0004] However, the above technical solutions still have the following shortcomings in practical applications:

[0005] Inflating the airbag securely connects the arm sleeve to the patient's arm. A ventilation and dehumidification mechanism prevents excessive sweating caused by the airbag pressing against the patient's arm, which can lead to redness, itching, and eczema. However, in some cases, patients sweat excessively, and because the airbag remains in close contact with the patient's arm, the contact area cannot receive even airflow, resulting in prolonged dehumidification time and affecting patient comfort. Summary of the Invention

[0006] In order to overcome the shortcomings of the prior art and solve at least one of the technical problems mentioned in the background art, the present invention proposes a catheter fixation device.

[0007] The technical solution adopted by the present invention to solve its technical problem is: a catheter fixing device, including an arm sleeve, an airbag fixedly connected to the inner ring of the arm sleeve, and a catheter positioning component provided on the arm sleeve;

[0008] The catheter positioning assembly includes a grooved plate fixedly connected to one side of the outer ring of the arm sleeve, and clamping blocks are slidably connected to both sides of the groove of the grooved plate.

[0009] The arm sleeve is also equipped with a sweat-absorbing component;

[0010] The sweat-absorbing component includes a rotating ring rotatably disposed within the inner cavity of the arm sleeve. A support block is fixedly connected to one side of the rotating ring, and a sliding rod is slidably connected to one side of the support block. The sliding rod passes through a groove on one side of the arm sleeve and can move within the groove. A groove block is fixedly connected to the end of the sliding rod, and a slider is slidably connected to the groove of the groove block. Sliding rods are slidably connected to both sides of the slider. A connecting block is fixedly connected to one end of the sliding rod, and a rotating rod is rotatably disposed at one end of the connecting block. A moisture-absorbing roller is sleeved on the rotating rod.

[0011] Preferably, an air pump is fixedly connected to one side of the outer wall of the arm sleeve, and an air outlet pipe is connected to the air outlet end of the air pump, with one end of the air outlet pipe connected to one side of the airbag.

[0012] Preferably, the groove of the slot plate is provided with bidirectional threaded rods at both ends, and both sides of the bidirectional threaded rods are threadedly connected to the clamping blocks.

[0013] Preferably, a second gear is rotatably arranged on one side of the inner cavity of the arm sleeve, and multiple tooth blocks are evenly arranged on the outer ring of the rotating ring. The second gear meshes with the tooth blocks on the outer ring of the rotating ring. A fifth motor is fixedly connected to one side of the inner cavity of the arm sleeve, and the output end of the fifth motor is fixedly connected to the second gear.

[0014] Preferably, a rack is provided on one side of the sliding rod, and a gear is rotatably provided on one end of the support block. The gear meshes with the toothed blocks on the rack. A motor is fixedly connected to one side of the support block, and the output end of the motor is fixedly connected to the gear.

[0015] Preferably, a threaded rod is threadedly connected to one side of the slider, one end of the threaded rod is rotatably mounted on the slot block, and a second motor is fixedly connected to one end of the slot block. The output end of the second motor is fixedly connected to one end of the threaded rod.

[0016] Preferably, a spring is fitted on one side of the slide rod, one end of the spring is fixedly connected to the connecting block, and the other end is fixedly connected to one side of the slider.

[0017] Preferably, a motor is fixedly connected to one side of the connecting block, and the output end of the motor is fixedly connected to one end of the rotating rod.

[0018] Preferably, the arm sleeve is further provided with an auxiliary lifting component;

[0019] The auxiliary lifting assembly includes two connecting rods rotatably mounted on one side of the outer wall of the arm sleeve. A connecting rod is rotatably mounted at one end of the connecting rod, and a connecting rod is rotatably mounted at one end of the connecting rod. An adjusting block is rotatably mounted at one end of the connecting rod. A tension rod is fixedly connected to one side of the adjusting block, and the tension rod passes through and is fixedly connected to one side of the airbag.

[0020] Preferably, a motor is fixedly connected to one side of the inner cavity of the arm sleeve, and the output end of the motor is fixedly connected to one end of the connecting rod.

[0021] The beneficial effects of this invention are as follows:

[0022] 1. The catheter fixation device of this invention involves placing an arm sleeve over the patient's arm, activating an air pump to inflate a cuff through an air outlet, gradually increasing the cuff's size and applying external force to the patient's arm to securely connect the arm sleeve to the patient's arm. Then, a medical catheter is passed between two clamping blocks. Rotating the bidirectional threaded rod brings the two clamping blocks closer together, clamping the medical catheter and thus fixing it in place. This prevents the catheter from loosening due to external force and allows for adjustment of the inflation volume based on the patient's arm thickness, broadening its applicability.

[0023] 2. The catheter fixation device of the present invention utilizes a sweat-absorbing component. When the patient's skin at the point of contact with the airbag secretes excessive sweat, the moisture-absorbing roller is driven to adhere to the patient's skin to absorb the sweat. This avoids the problem of excessive sweat secretion caused by the airbag pressing against the patient's arm, which can lead to skin redness, itching, and eczema. Furthermore, compared to ventilation and dehumidification methods, this method allows the moisture-absorbing roller to directly contact the patient's skin and quickly absorb sweat when there is a lot of sweat. This avoids the situation where the contact area is difficult to be evenly ventilated due to the continuous close contact between the airbag and the patient's arm, resulting in prolonged dehumidification time and affecting the patient's comfort.

[0024] 3. The catheter fixation device of the present invention utilizes an auxiliary lifting component. When it is necessary to drive the absorbent roller into the gap between the airbag and the patient's skin, the tension rod moves one side of the airbag away from the patient's skin, thereby creating a gap between the airbag and the patient's skin for the absorbent roller to pass through. Then, the absorbent roller is moved to the gap, allowing it to perform its subsequent functions normally. This avoids the situation where, due to the airbag being tightly fitted to the patient's skin, the absorbent roller's end may abut against the airbag, making it difficult to insert into the gap, thus ensuring the normal operation of the absorbent roller afterwards. Attached Figure Description

[0025] The invention will now be further described with reference to the accompanying drawings.

[0026] Figure 1This is a three-dimensional structural schematic diagram of the present invention;

[0027] Figure 2 This is a schematic diagram of the three-dimensional structure at the sliding rod.

[0028] Figure 3 yes Figure 2 Enlarged view of a portion of point A in the middle;

[0029] Figure 4 This is a schematic diagram of the three-dimensional structure at the rotating ring;

[0030] Figure 5 yes Figure 4 Enlarged view of a section at point B in the middle;

[0031] Figure 6 This is a three-dimensional structural schematic diagram of the present invention from another perspective;

[0032] Figure 7 yes Figure 6 Enlarged view of a section at point C;

[0033] Figure 8 This is a schematic diagram of the three-dimensional structure of the groove plate.

[0034] In the diagram: 1. Arm sleeve; 2. Clamping block; 3. Groove plate; 4. Airbag; 5. Sliding rod; 6. Moisture-absorbing roller; 7. Motor 1; 8. Connecting rod 1; 9. Tensioning rod; 10. Rack; 11. Rotating rod; 12. Motor 2; 13. Air outlet pipe; 14. Motor 3; 15. Connecting block; 16. Groove block; 17. Slider; 18. Threaded rod; 19. Slide rod; 20. Spring; 21. Connecting rod 2; 22. Adjusting block; 23. Rotating ring; 24. Gear 1; 25. Motor 4; 26. Support block; 27. Gear 2; 28. Motor 5; 29. ​​Bidirectional threaded rod; 30. Air pump. Detailed Implementation

[0035] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] Please refer to Figures 1-8 The present invention provides a technical solution: a catheter fixation device, including an arm sleeve 1, an airbag 4 fixedly connected to the inner ring of the arm sleeve 1, and a catheter positioning component provided on the arm sleeve 1.

[0037] The catheter positioning assembly includes a groove plate 3 fixedly connected to one side of the outer ring of the arm sleeve 1, and clamping blocks 2 are slidably connected to both sides of the groove of the groove plate 3;

[0038] The arm sleeve 1 is also equipped with a sweat-absorbing component;

[0039] The sweat-absorbing component includes a rotating ring 23 rotatably disposed in the inner cavity of the arm sleeve 1. A support block 26 is fixedly connected to one side of the rotating ring 23. A sliding rod 5 is slidably connected to one side of the support block 26. The sliding rod 5 passes through a groove on one side of the arm sleeve 1 and can move in the groove. A groove block 16 is fixedly connected to the end of the sliding rod 5. A slider 17 is slidably connected to the groove of the groove block 16. Sliding rods 19 are slidably connected to both sides of the slider 17. A connecting block 15 is fixedly connected to one end of the sliding rod 19. A rotating rod 11 is rotatably disposed at one end of the connecting block 15. A moisture-absorbing roller 6 is sleeved on the rotating rod 11.

[0040] In this embodiment, as Figure 6 and Figure 8 As shown, an air pump 30 is fixedly connected to one side of the outer wall of the arm sleeve 1. The air outlet of the air pump 30 is connected to an air outlet pipe 13, and one end of the air outlet pipe 13 is connected to one side of the airbag 4.

[0041] The two ends of the groove of the slot plate 3 are rotatably provided with bidirectional threaded rods 29, and both sides of the bidirectional threaded rods 29 are threadedly connected to the clamping block 2.

[0042] Specifically, the arm sleeve 1 is placed over the patient's arm, and the air pump 30 is activated. The air pump 30 inflates the air bag 4 through the air outlet pipe 13, causing the air bag 4 to gradually inflate and apply external force to the patient's arm, thus firmly connecting the arm sleeve 1 to the patient's arm. Then, the medical catheter is passed between the two clamping blocks 2, and the bidirectional threaded rod 29 is rotated to bring the two clamping blocks 2 closer together, clamping the medical catheter. This achieves the fixation of the catheter, preventing it from loosening due to external force, and allows for adjustment of the inflation volume based on the thickness of the patient's arm, making it more widely applicable.

[0043] In this embodiment, as Figures 2-5 As shown, a gear 27 is rotatably mounted on one side of the inner cavity of the arm sleeve 1, and multiple tooth blocks are evenly arranged on the outer ring of the rotating ring 23. The gear 27 meshes with the tooth blocks on the outer ring of the rotating ring 23. A motor 28 is fixedly connected to one side of the inner cavity of the arm sleeve 1, and the output end of the motor 28 is fixedly connected to the gear 27.

[0044] A rack 10 is provided on one side of the sliding rod 5, and a gear 24 is rotatably provided on one end of the support block 26. The gear 24 meshes with the toothed block on the rack 10. A motor 25 is fixedly connected to one side of the support block 26, and the output end of the motor 25 is fixedly connected to the gear 24.

[0045] A threaded rod 18 is threadedly connected to one side of the slider 17. One end of the threaded rod 18 is rotatably mounted on the slot block 16. A motor 12 is fixedly connected to one end of the slot block 16. The output end of the motor 12 is fixedly connected to one end of the threaded rod 18.

[0046] A spring 20 is fitted on one side of the slide bar 19. One end of the spring 20 is fixedly connected to the connecting block 15, and the other end is fixedly connected to one side of the slider 17.

[0047] A motor 14 is fixedly connected to one side of the connecting block 15, and the output end of the motor 14 is fixedly connected to one end of the rotating rod 11.

[0048] Specifically, in existing technology, the airbag 4 is inflated to securely connect the arm sleeve 1 to the patient's arm. Furthermore, a ventilation and dehumidification mechanism is incorporated to prevent excessive sweating caused by the airbag 4 pressing against the patient's arm, which could lead to redness, itching, and eczema. However, in some cases, patients sweat excessively, and because the airbag 4 remains in close contact with the patient's arm, the contact area is difficult to circulate air evenly, resulting in prolonged dehumidification time and affecting patient comfort.

[0049] Therefore, to solve the above problems, in this embodiment, when excessive sweat secretion occurs at the point where the patient's skin contacts the airbag 4, motor 212 drives the threaded rod 18 to rotate, causing the slider 17 to slide inside the groove block 16, bringing the absorbent roller 6 closer to the patient's skin until it is in close contact with the patient's skin. Then, motor 425 drives gear 24 to rotate, and gear 24 drives the sliding rod 5 to slide on the support block 26 via rack 10, causing the absorbent roller 6 to extend into the area where the airbag 4 contacts the patient's skin. Then, motors 3 (14) and 5 (28) are started simultaneously. Motor 5 (28) drives gear 2 (27) to rotate, causing the rotating ring 23 to rotate. This causes the absorbent roller 6 to make circular motion. At the same time, motor 3 (14) drives the rotating rod 11 to rotate, causing the absorbent roller 6 to rotate. The absorbent roller 6 moves along the surface of the patient's arm, absorbing the patient's sweat. With the cooperation of the slide rod 19 and the spring 20, the absorbent roller 6 can adapt to the undulations of the patient's arm, maintaining a close fit with the patient's arm at all times. After the absorbent roller 6 has moved along the patient's arm for one revolution, the sweat on the skin where the patient's arm is in contact with the airbag 4 has been evenly absorbed. Then, the absorbent roller 6 can be driven away from the patient's skin. This avoids the problem of excessive sweat secretion caused by the airbag 4 pressing against the patient's arm, which can lead to skin redness, itching, and eczema. Moreover, compared to ventilation and dehumidification methods, this method can drive the moisture-absorbing roller 6 to directly contact the patient's skin when the patient is sweating a lot, and quickly absorb the sweat. This avoids the situation where the airbag 4 is in close contact with the patient's arm, making it difficult for the contact area to receive air evenly, which would prolong the dehumidification time and affect the patient's comfort.

[0050] In addition, since the absorbent roller 6 is mounted on the rotating rod 11, the absorbent roller 6 can be replaced when different patients use it to avoid cross-infection.

[0051] In this embodiment, as Figure 2 and Figure 7As shown, the arm sleeve 1 is also equipped with an auxiliary lifting component;

[0052] The auxiliary lifting component includes two connecting rods 8 rotatably mounted on one side of the outer wall of the arm sleeve 1. A connecting rod 21 is rotatably mounted on one end of the connecting rod 8, and a connecting rod 8 is rotatably mounted on one end of the connecting rod 21. An adjusting block 22 is rotatably mounted on one end of the connecting rod 8. A tension rod 9 is fixedly connected to one side of the adjusting block 22. The tension rod 9 passes through and is fixedly connected to one side of the airbag 4.

[0053] A motor 7 is fixedly connected to one side of the inner cavity of the arm sleeve 1, and the output end of the motor 7 is fixedly connected to one end of the connecting rod 8.

[0054] Specifically, in the above embodiments, although sweat can be absorbed by driving the absorbent roller 6 to contact the patient's skin, because the airbag 4 is in close contact with the patient's skin, when the absorbent roller 6 is inserted into the gap between the airbag 4 and the patient's skin, it is easy for the absorbent roller 6 to be difficult to insert because the end of the absorbent roller 6 abuts against the airbag 4, thus affecting the subsequent normal operation of the absorbent roller 6.

[0055] Therefore, to solve the above problems, in this embodiment, since the tension rod 9 is connected to the airbag 4 through and fixedly, when it is necessary to drive the absorbent roller 6 into the gap between the airbag 4 and the patient's skin, the motor 7 drives the connecting rod 8 to rotate, and with the cooperation of the connecting rod 21, the tension rod 9 moves. The tension rod 9 drives one side of the airbag 4 to move away from the patient's skin, thus creating a gap between the airbag 4 and the patient's skin for the absorbent roller 6 to pass through. Then, the absorbent roller 6 is driven to move into the gap, and the absorbent roller 6 can then perform its subsequent work normally. This avoids the situation where, because the airbag 4 is in close contact with the patient's skin, the absorbent roller 6 is difficult to insert into the gap between the airbag 4 and the patient's skin due to the end of the absorbent roller 6 abutting against the airbag 4, thus ensuring the normal operation of the absorbent roller 6 afterwards.

[0056] Working principle: The arm sleeve 1 is placed over the patient's arm. The air pump 30 is activated, and the air pump 30 inflates the air bag 4 through the air outlet pipe 13, gradually inflating the air bag 4 and applying external force to the patient's arm, thus firmly connecting the arm sleeve 1 to the patient's arm. Then, the medical catheter is passed between the two clamping blocks 2. The bidirectional threaded rod 29 is rotated to bring the two clamping blocks 2 closer together, clamping the medical catheter, thereby fixing the catheter and preventing it from loosening due to external force. Furthermore, the inflation volume can be adjusted according to the thickness of the patient's arm, making it more widely applicable. When the patient's skin at the point of contact with the airbag 4 secretes excessive sweat, motor 212 drives the threaded rod 18 to rotate, causing the slider 17 to slide inside the groove block 16, bringing the absorbent roller 6 close to the patient's skin until it is in close contact. Then, motor 425 drives gear 124 to rotate, which in turn drives the sliding rod 5 to slide on the support block 26 via rack 10, allowing the absorbent roller 6 to extend into the area where the airbag 4 contacts the patient's skin. Simultaneously, motors 314 and 528 are activated, with motor 528 driving gear 227 to rotate, causing the rotating ring 23 to rotate, thus making the absorbent roller 6 perform circular motion. At the same time, motor 314 drives the rotating rod 11 to rotate, causing the absorbent roller 6 to rotate on its own axis. The absorbent roller 6 moves along the surface of the patient's arm, absorbing the patient's sweat. Furthermore, with the cooperation of the sliding rod 19 and spring 20, the absorbent roller 6 can adapt to the undulations of the patient's arm, maintaining a close contact with the patient's arm at all times. After the absorbent roller 6 moves around the patient's arm once, the sweat on the skin where the patient's arm is in contact with the airbag 4 is evenly absorbed. Then, the absorbent roller 6 is moved away from the patient's skin. This avoids the problem of excessive sweat secretion caused by the airbag 4 pressing against the patient's arm, which can lead to redness, itching, and eczema. Moreover, compared to ventilation dehumidification, this method allows the absorbent roller 6 to directly contact the patient's skin when there is a lot of sweat, and quickly absorbs the sweat. This avoids the situation where the airbag 4 is in continuous close contact with the patient's arm, making it difficult for the contact area to receive even airflow, which would prolong the dehumidification time and affect the patient's comfort. In addition, since the absorbent roller 6 is mounted on the rotating rod 11, the absorbent roller 6 can be replaced when different patients use the device, avoiding cross-infection. Because the tension rod 9 is connected and fixed to the airbag 4, when it is necessary to drive the absorbent roller 6 into the gap between the airbag 4 and the patient's skin, the motor 7 drives the connecting rod 8 to rotate, and with the cooperation of the connecting rod 21, the tension rod 9 moves. The tension rod 9 drives one side of the airbag 4 to move away from the patient's skin, thus creating a gap between the airbag 4 and the patient's skin for the absorbent roller 6 to pass through. Then, the absorbent roller 6 is driven to move into the gap, and it can then perform its subsequent work normally. This avoids the situation where, due to the close contact between the airbag 4 and the patient's skin, the absorbent roller 6 is difficult to insert into the gap between the airbag 4 and the patient's skin because the end of the absorbent roller 6 abuts against the airbag 4, ensuring the normal operation of the absorbent roller 6 afterwards.

[0057] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A catheter fixation device, comprising an arm sleeve (1), characterized in that: An airbag (4) is fixedly connected to the inner ring of the arm sleeve (1), and a catheter positioning assembly is provided on the arm sleeve (1). The catheter positioning assembly includes a groove plate (3) fixedly connected to one side of the outer ring of the arm sleeve (1), and clamping blocks (2) are slidably connected to both sides of the groove of the groove plate (3). The arm sleeve (1) is also equipped with a sweat-absorbing component; The sweat-absorbing component includes a rotating ring (23) rotatably disposed in the inner cavity of the arm sleeve (1). A support block (26) is fixedly connected to one side of the rotating ring (23). A sliding rod (5) is slidably connected to one side of the support block (26). The sliding rod (5) passes through a groove on one side of the arm sleeve (1) and can move in the groove. A groove block (16) is fixedly connected to the end of the sliding rod (5). A slider (17) is slidably connected to the groove of the groove block (16). Sliding rods (19) are slidably connected to both sides of the slider (17). A connecting block (15) is fixedly connected to one end of the sliding rod (19). A rotating rod (11) is rotatably disposed at one end of the connecting block (15). A moisture-absorbing roller (6) is sleeved on the rotating rod (11). An auxiliary lifting component is also provided on the arm sleeve (1). The auxiliary lifting assembly includes two connecting rods (8) rotatably mounted on one side of the outer wall of the arm sleeve (1). One end of the connecting rod (8) is rotatably mounted with a connecting rod (21). One end of the connecting rod (21) is rotatably mounted with an adjusting block (22). One side of the adjusting block (22) is fixedly connected with a tension rod (9). The tension rod (9) passes through and is fixedly connected to one side of the airbag (4). One side of the inner cavity of the arm sleeve (1) is fixedly connected with a motor (7). The output end of the motor (7) is fixedly connected to one end of the connecting rod (8). The motor (7) drives the connecting rod (8) to rotate, and with the cooperation of the connecting rod (21), the tension rod (9) moves. The tension rod (9) drives one side of the airbag (4) to move. One side of the airbag (4) moves away from the patient's skin, so that a gap appears between the airbag (4) and the patient's skin, through which the moisture-absorbing roller (6) can pass.

2. The catheter fixation device according to claim 1, characterized in that: An air pump (30) is fixedly connected to one side of the outer wall of the arm sleeve (1). The air outlet of the air pump (30) is connected to an air outlet pipe (13). One end of the air outlet pipe (13) is connected to one side of the air bag (4).

3. The catheter fixation device according to claim 1, characterized in that: The groove plate (3) has a two-way threaded rod (29) rotatably installed at both ends of the groove. Both sides of the two-way threaded rod (29) are threadedly connected to the clamping block (2).

4. The catheter fixation device according to claim 1, characterized in that: Gear 2 (27) is rotatably arranged on one side of the inner cavity of the arm sleeve (1). Multiple tooth blocks are evenly arranged on the outer ring of the rotating ring (23). Gear 2 (27) meshes with the tooth blocks on the outer ring of the rotating ring (23). Motor 5 (28) is fixedly connected to one side of the inner cavity of the arm sleeve (1). The output end of motor 5 (28) is fixedly connected to gear 2 (27).

5. A catheter fixation device according to claim 1, characterized in that: A rack (10) is provided on one side of the sliding rod (5), and a gear (24) is rotatably provided on one end of the support block (26). The gear (24) meshes with the toothed blocks on the rack (10). A motor (25) is fixedly connected to one side of the support block (26), and the output end of the motor (25) is fixedly connected to the gear (24).

6. A catheter fixation device according to claim 1, characterized in that: The slider (17) is threadedly connected to a threaded rod (18) on one side. One end of the threaded rod (18) is rotatably mounted on the slot block (16). One end of the slot block (16) is fixedly connected to a motor (12). The output end of the motor (12) is fixedly connected to one end of the threaded rod (18).

7. A catheter fixation device according to claim 1, characterized in that: A spring (20) is fitted on one side of the slide bar (19). One end of the spring (20) is fixedly connected to the connecting block (15), and the other end is fixedly connected to one side of the slider (17).

8. A catheter fixation device according to claim 1, characterized in that: The connecting block (15) is fixedly connected to one side of the motor three (14), and the output end of the motor three (14) is fixedly connected to one end of the rotating rod (11).

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