Hemodialysis catheter intelligent fixing device based on dynamic pressure feedback

Abstract

The invention belongs to the technical field of medical equipment, and discloses an intelligent hemodialysis catheter fixing device based on dynamic pressure feedback, which comprises a bandage, a limiting seat is fixed at the top end of the bandage, a vibration mechanism is mounted in the limiting seat, and an air blowing mechanism is mounted in the limiting seat. Through cooperation of a micro motor, a connecting rod, an eccentric wheel and other structures, when the dialysis catheter body is placed into the body of a patient for dialysis for a long time, the dialysis catheter body can be fixed to a connecting base through a limiting nut, at the moment, the two sides of a limiting plate are close to first reset springs, and the micro motor is started to drive the connecting rod and the eccentric wheel to rotate; when the eccentric wheel rotates, the eccentric wheel continuously makes contact with the top end of the limiting plate and presses the limiting plate downwards to generate deformation, when the eccentric wheel is disengaged, the limiting plate is reset through the first reset spring, the limiting plate vibrates, the thrombus forming probability is reduced, and therefore the purpose that the thrombus forming probability is reduced when the device is fixed is achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical devices, and specifically relates to an intelligent fixing device for hemodialysis catheters based on dynamic pressure feedback. Background Art

[0002] The time for hemodialysis is generally about 4 hours, and this process is relatively long, so it is necessary to fix the hemodialysis catheter. The conventional fixing method is to directly stick the catheter to the patient's skin with tape. The problems with this fixing method are that the tape is easy to fall off and it will cause discomfort to the patient.

[0003] For example, the disclosed CN208877659U discloses a fixing device for hemodialysis catheters, which includes a transparent protective bag body. A circular dressing is provided at the center of the bottom of the transparent protective bag body. The circular dressing is sequentially provided with a circular color-changing card, a circular drying patch and a through hole for the central venous catheter to pass through from outside to inside. The central venous catheter is fixed above the inside of the transparent protective bag body by a magic tape. The top of the transparent protective bag body forms two states of opening and closing through a movable opening. The outside of the bottom of the transparent protective bag body is an adhesive, and the adhesive surrounds and encloses the circular dressing. By using the circular dressing, the wound is not in contact with the skin, reducing the possibility of wound allergy and infection; the dressing and the protective bag body are integrated through the adhesive at the bottom of the bag body, and the materials of the dressing and the protective bag body are waterproof, enabling the patient to take a bath easily, and being more economical, beautiful and practical.

[0004] However, in the actual use process of this device, it is impossible to monitor the dynamic pressure received by the patient in real time, and to relieve it specifically by detecting the discomfort of the patient, and the probability of thrombus formation is increased due to the catheter being in the patient's body for a long time. Summary of the Invention

[0005] To solve the problems raised in the above background art, the present invention provides an intelligent fixing device for hemodialysis catheters based on dynamic pressure feedback.

[0006] To achieve the above object, the present invention provides the following technical solution: An intelligent fixing device for hemodialysis catheters based on dynamic pressure feedback, including a strap. A limit seat is fixed at the top end of the strap. A massage airbag is installed inside the strap. A vibration mechanism is installed inside the limit seat. A blowing mechanism is installed inside the limit seat.

[0007] The vibration mechanism includes a micro motor, a connecting rod and an eccentric wheel. The micro motor is fixed inside the limit seat. A connecting rod is fixed outside the micro motor. An eccentric wheel is fixed outside the connecting rod. A connecting seat is fixed at the top end of the limit seat. A limit plate is arranged outside the connecting seat. A limit nut is threadedly connected to the top end of the connecting seat. A first return spring is fixed at the top end of the limit seat.

[0008] The air blowing mechanism includes a driving rotor, a gas collecting port, and a first air delivery channel. The driving rotor is fixed outside the connecting rod. The top end of the limit seat is provided with a gas collecting port, and the inside of the limit seat is provided with a first air delivery channel. A first limit block is movably connected inside the limit seat, and a first air delivery hole is provided at one end of the first limit block.

[0009] Preferably, the connecting rod is rotatably connected to the limit seat. There are two sets of eccentric wheels, which are symmetrically distributed about the central axis of the connecting rod. There are four sets of connecting seats, which are symmetrically distributed about the central axis of the limit plate.

[0010] Preferably, there are four sets of first return springs, which are symmetrically distributed about the central axis of the limit plate. The first return springs are used to squeeze the limit plate and keep it in a tendency to move upward.

[0011] Preferably, an air delivery pipe is communicated with the outside of the limit seat. A clamping block is movably connected to the outside of the first limit block. An extension block is fixed to the outside of the first limit block, and a second return spring is fixed to the bottom end of the extension block. A second air delivery channel is provided inside the limit seat. A second limit block is movably connected inside the limit seat. A second air delivery hole is provided at the top end of the second limit block. A third return spring is fixed to the outside of the second limit block. A third air delivery channel is provided inside the limit seat. A driven rotor is rotatably connected inside the limit seat.

[0012] Preferably, two convex blocks are provided on the outer wall of the driving rotor and are symmetrically distributed about the central axis of the driving rotor. An air collecting cavity is provided inside the limit seat. The air collecting cavity is communicated with the gas collecting port, the first air delivery channel, and the second air delivery channel. The outer wall of the first limit block fits against the inner wall of the limit seat, and the first limit block is slidably connected to the limit seat. The output end of the first air delivery channel is communicated with the first air delivery hole. The output end of the first air delivery hole is communicated with the limit seat, and the first air delivery hole is communicated with the air delivery pipe.

[0013] Preferably, a clamping groove is provided at the top end of the limit seat, and the clamping block can be clamped in the clamping groove. The extension block is slidably connected to the limit seat. The second return spring is used to squeeze the extension block and keep it in a tendency to move upward.

[0014] Preferably, a third air delivery channel is further provided on the limit seat. The second air delivery hole can be simultaneously communicated with the second air delivery channel and the third air delivery channel. The output end of the third air delivery channel is communicated with the massage airbag.

[0015] Preferably, the outer wall of the second limiting block fits against the inner wall of the limiting seat. The second limiting block is slidably connected to the limiting seat. The third return spring is used to squeeze the second limiting block and keep it in a tendency to move outwards.

[0016] Preferably, a flexible pressure sensor is fixed to the inner wall of the strap. A dialysis catheter main body is arranged at the top end of the limiting seat. A magic tape hook surface is fixed to the outside of the strap. A magic tape loop surface is fixed to the outside of the strap. A battery is fixed to the top end of the limiting seat.

[0017] Preferably, several groups of flexible pressure sensors are provided. The flexible pressure sensors are evenly distributed at equal intervals. Several groups of limiting hooks are arranged on the surface of the magic tape hook surface. Several groups of hook furs are arranged on the surface of the magic tape loop surface.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] Through the cooperation of structures such as a micro motor, a connecting rod, and an eccentric wheel, when the device implants the dialysis catheter main body into the patient's body for a long time for dialysis, the dialysis catheter main body is fixed to the connecting seat through a limiting nut. At this time, both sides of the limiting plate are close to the first return spring. Starting the micro motor drives the connecting rod and the eccentric wheel to rotate, so that when the eccentric wheel rotates, it continuously contacts the top end of the limiting plate, presses it down to cause deformation, and when the eccentric wheel disengages, the first return spring resets the limiting plate, causing the limiting plate to vibrate, and then causing the entire dialysis catheter main body to generate high-frequency vibration and conduct through the catheter wall, reducing the probability of thrombus formation, so as to achieve the purpose of facilitating the reduction of the probability of thrombus formation when the device is fixed.

[0020] Through the cooperation of structures such as a driving rotor, an air collecting port, and a first air delivery channel, the device can make the second air delivery channel, the second air delivery hole, and the third air delivery channel communicate after pressing the first limiting block to squeeze the second limiting block, and the first air delivery channel, the first air delivery hole, and the air delivery pipe communicate when not pressed. When the connecting rod rotates, it drives the driving rotor to rotate, and then drives the driven rotor to rotate in the reverse direction to squeeze air, and conveys the gas through the air collecting port. A one-way valve is arranged at the position of the air collecting port, which can only inhale air and cannot exhaust air. When the first air delivery channel is opened, the gas can be conveyed to the air delivery pipe and then discharged. The user can hold the air delivery pipe and blow it towards the catheter interface to remove residual blood or contaminants, reducing the risk of cross-infection, and the periodic micro-airflow stimulates the skin at the contact part of the fixing device to promote blood circulation. When the second air delivery channel is opened, the massage airbag can be inflated through the third air delivery channel to make it expand, and then press and massage the patient's skin surface, so as to achieve the purpose of facilitating the device to quickly switch to the blowing state and the inflating state for massage. Description of the Drawings

[0021] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 is a schematic diagram of the overall bottom view structure of the present invention;

[0023] Figure 3 is a schematic diagram of the overall rear view structure of the present invention;

[0024] Figure 4 is a schematic diagram of the main structure of the dialysis catheter of the present invention;

[0025] Figure 5 is a schematic diagram of the vibration mechanism structure of the present invention;

[0026] Figure 6 is a schematic diagram of the air blowing mechanism structure of the present invention;

[0027] Figure 7 is of the present invention Figure 6 local sectional enlarged structure schematic diagram at position A;

[0028] Figure 8 is a schematic diagram of the channel switching structure of the air blowing mechanism of the present invention.

[0029] In the figure: 1. Binding strap; 2. Flexible pressure sensor; 3. Massage airbag; 4. Limit seat; 5. Dialysis catheter main body; 6. Vibration mechanism; 601. Micro motor; 602. Connecting rod; 603. Eccentric wheel; 604. Connecting seat; 605. Limit plate; 606. Limit nut; 607. First return spring; 7. Air blowing mechanism; 701. Active rotor; 702. Air collecting port; 703. First air delivery channel; 704. First limit block; 705. First air delivery hole; 706. Air delivery pipe; 707. Clamping block; 708. Extension block; 709. Second return spring; 710. Second air delivery channel; 711. Second limit block; 712. Second air delivery hole; 713. Third return spring; 714. Third air delivery channel; 715. Driven rotor; 8. Magic hook surface; 9. Magic loop surface; 10. Battery. Detailed implementation manners

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0031] Such as Figures 1 to 8As shown in the figure, the present invention provides an intelligent fixing device for a hemodialysis catheter based on dynamic pressure feedback, which includes a strap 1. A limit seat 4 is fixed at the top end of the strap 1. A massage airbag 3 is installed inside the strap 1. A vibration mechanism 6 is installed inside the limit seat 4. A blowing mechanism 7 is installed inside the limit seat 4. A flexible pressure sensor 2 is fixed on the inner wall of the strap 1. A main hemodialysis catheter 5 is arranged at the top end of the limit seat 4. A magic tape hook surface 8 is fixed on the outside of the strap 1. A magic tape loop surface 9 is fixed on the outside of the strap 1. There are several groups of flexible pressure sensors 2, and the flexible pressure sensors 2 are distributed at equal intervals. Several groups of limit hooks are arranged on the surface of the magic tape hook surface 8. Several groups of hook fluffs are arranged on the surface of the magic tape loop surface 9. A battery 10 is fixed at the top end of the limit seat 4.

[0032] Adopting the above scheme: The strap 1 is integrally tied to the patient through the magic tape hook surface 8 and the magic tape loop surface 9, which is convenient for fixing the main hemodialysis catheter 5 and enables the flexible pressure sensor 2 to contact the patient's skin, so that it can detect the pressure received by the patient. When the local pressure of the patient is abnormal, such as the pressure increases due to muscle stiffness or swelling, the resistance value of the conductive material inside the sensor changes accordingly, and is converted into an electrical signal through a circuit, and then the pressure received by the patient locally is detected. When the index is abnormal, the user can inflate the massage airbag 3 to make it expand, and the battery 10 can supply power to the device.

[0033] As Figures 1 to 8 Shown in the figure, the vibration mechanism 6 includes a micro motor 601, a connecting rod 602 and an eccentric wheel 603. The micro motor 601 is fixed inside the limit seat 4. A connecting rod 602 is fixed to the outside of the micro motor 601. An eccentric wheel 603 is fixed to the outside of the connecting rod 602. A connecting seat 604 is fixed at the top end of the limit seat 4. A limit plate 605 is arranged outside the connecting seat 604. The connecting rod 602 is rotatably connected to the limit seat 4. There are two groups of eccentric wheels 603, and the eccentric wheels 603 are symmetrically distributed about the central axis of the connecting rod 602. There are four groups of connecting seats 604, and the connecting seats 604 are symmetrically distributed about the central axis of the limit plate 605.

[0034] As Figures 1 to 8 Shown in the figure, a limit nut 606 is threadedly connected to the top end of the connecting seat 604. A first return spring 607 is fixed at the top end of the limit seat 4. There are four groups of first return springs 607, and the first return springs 607 are symmetrically distributed about the central axis of the limit plate 605. The first return spring 607 is used to squeeze the limit plate 605 and keep it in a trend of moving upward.

[0035] Adopting the above solution: By starting the micro motor 601 to drive the connecting rod 602 and the eccentric wheel 603 to rotate, when the eccentric wheel 603 rotates, it continuously contacts the top of the limit plate 605, presses it down to cause deformation, and when the eccentric wheel 603 disengages, the first return spring 607 resets the limit plate 605, causing the limit plate 605 to vibrate, and then causing the dialysis catheter main body 5 to generate high-frequency vibration and conduct through the catheter wall, reducing the probability of thrombus formation.

[0036] As Figures 1 to 8 shown, the air blowing mechanism 7 includes a driving rotor 701, an air collecting port 702 and a first air delivery channel 703. The driving rotor 701 is fixed outside the connecting rod 602. An air collecting port 702 is opened at the top of the limit seat 4. A first air delivery channel 703 is opened inside the limit seat 4. A first limit block 704 is movably connected inside the limit seat 4. A first air delivery hole 705 is opened at one end of the first limit block 704. An air delivery pipe 706 is communicated with the outside of the limit seat 4. Two convex blocks are arranged on the outer wall of the driving rotor 701 and are symmetrically distributed about the central axis of the driving rotor 701. An air collecting cavity is opened inside the limit seat 4. The air collecting cavity is communicated with the air collecting port 702, the first air delivery channel 703 and the second air delivery channel 710. The outer wall of the first limit block 704 fits the inner wall of the limit seat 4. The first limit block 704 and the limit seat 4 are slidably connected. The output end of the first air delivery channel 703 is communicated with the first air delivery hole 705. The output end of the first air delivery hole 705 is communicated with the limit seat 4. The first air delivery hole 705 is communicated with the air delivery pipe 706.

[0037] As Figures 1 to 8 shown, a clamping block 707 is movably connected to the outside of the first limit block 704. An extension block 708 is fixed to the outside of the first limit block 704. A second return spring 709 is fixed to the bottom end of the extension block 708. A clamping groove is opened at the top of the limit seat 4. The clamping block 707 can be clamped in the clamping groove. The extension block 708 and the limit seat 4 are slidably connected. The second return spring 709 is used to squeeze the extension block 708 and keep it in an upward moving trend.

[0038] As Figures 1 to 8 shown, a second air delivery channel 710 is opened inside the limit seat 4. A second limit block 711 is movably connected inside the limit seat 4. A second air delivery hole 712 is opened at the top of the second limit block 711. A third return spring 713 is fixed to the outside of the second limit block 711. A third air delivery channel 714 is opened inside the limit seat 4. A driven rotor 715 is rotatably connected inside the limit seat 4. A third air delivery channel 714 is also provided on the limit seat 4. The second air delivery hole 712 can be simultaneously communicated with the second air delivery channel 710 and the third air delivery channel 714. The output end of the third air delivery channel 714 is communicated with the massage airbag 3.

[0039] Adopting the above solution: When the connecting rod 602 rotates, it drives the active rotor 701 to rotate. Then, the active rotor 701 drives the driven rotor 715 to rotate in the opposite direction to compress air, and the air is conveyed through the air collecting port 702. A one-way valve is arranged at the position of the air collecting port 702, which can only inhale air and cannot exhaust air. When the first air conveying channel 703 is opened, the air can be conveyed to the air pipe 706 and then discharged. The user can blow the catheter interface by holding the air pipe 706 to remove residual blood or pollutants and reduce the risk of cross-infection. When the second air conveying channel 710 is opened, the massage airbag 3 can be inflated through the third air conveying channel 714 to make it expand, and then press and massage the patient's skin surface.

[0040] Working principle and usage process of the present invention: The strap 1 is integrally strapped to the patient through the hook surface 8 and the loop surface 9 of the Velcro, which is convenient for fixing the dialysis catheter main body 5 and enables the flexible pressure sensor 2 to contact the patient's skin, so that it can detect the pressure received by the patient and cooperate with the massage airbag 3 for targeted massage. The dialysis catheter main body 5 is fixed on the connecting seat 604 through the limit nut 606. At this time, both sides of the limit plate 605 are close to the first return spring 607. The micro motor 601 is started to drive the connecting rod 602 and the eccentric wheel 603 to rotate, so that the eccentric wheel 603 continuously contacts the top of the limit plate 605 during rotation, presses it down to cause deformation, and when the eccentric wheel 603 disengages, the first return spring 607 returns the limit plate 605, causing the limit plate 605 to vibrate, and then causing the entire dialysis catheter main body 5 to generate high-frequency vibration and conduct through the catheter wall, destroying the adsorption process of fibrinogen on the catheter surface and reducing the probability of thrombus formation. By pressing the first limit block 704, the first limit block 704 squeezes the second limit block 711, and then the second air supply channel 710, the second air supply hole 712 and the third air supply channel 714 are connected. When not pressed, the first air supply channel 703, the first air supply hole 705 and the air supply pipe 706 are connected. When the connecting rod 602 rotates, it drives the active rotor 701 to rotate, and then drives the driven rotor 715 to rotate in the reverse direction to squeeze air, and conveys the gas through the air collecting port 702. A one-way valve is arranged at the position of the air collecting port 702, which can only inhale air and cannot exhaust air. When the first air supply channel 703 is opened, the gas can be conveyed to the air supply pipe 706 and then discharged. The user can hold the air supply pipe 706 to blow the catheter interface to remove residual blood or pollutants, reducing the risk of cross-infection, and the periodic micro-airflow stimulates the skin at the contact part of the fixing device to promote blood circulation. When the second air supply channel 710 is opened, the massage airbag 3 can be inflated through the third air supply channel 714 to make it expand, and then press and massage the patient's skin surface. After the user presses to switch the channel, the fixing is completed by the engagement of the block 707 and the limit seat 4. When it is necessary to switch to the blowing state, the block 707 is disengaged, and the second return spring 709 moves the extension block 708 and the first limit block 704 upward as a whole, so that the second limit block 711 is no longer squeezed. At this time, the second limit block 711 is reset by the third return spring 713 to complete the switching of the channel.

[0041] When the local pressure of the patient is abnormal, such as the pressure increases due to muscle stiffness or swelling, the resistance value of the conductive material inside the sensor changes accordingly, and is converted into an electrical signal through the circuit, and then the pressure received by the local part of the patient is detected. When the index is abnormal, the user can inflate the massage airbag 3 to make it expand, and then press and massage the patient's skin surface to relieve the pressure.

[0042] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device.

[0043] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An intelligent fixing device for a hemodialysis catheter based on dynamic pressure feedback, comprising a strap (1), characterized in that: The top end of the strap (1) is fixed with a limit seat (4), a massage airbag (3) is installed inside the strap (1), a vibration mechanism (6) is installed inside the limit seat (4), and a blowing mechanism (7) is installed inside the limit seat (4); The vibration mechanism (6) includes a micro motor (601), a connecting rod (602) and an eccentric wheel (603). The micro motor (601) is fixed inside the limit seat (4), the connecting rod (602) is fixed outside the micro motor (601), the eccentric wheel (603) is fixed outside the connecting rod (602), a connecting seat (604) is fixed at the top end of the limit seat (4), a limit plate (605) is arranged outside the connecting seat (604), a limit nut (606) is threadedly connected to the top end of the connecting seat (604), and a first return spring (607) is fixed at the top end of the limit seat (4); The blowing mechanism (7) includes a driving rotor (701), an air collecting port (702) and a first air delivery channel (703). The driving rotor (701) is fixed outside the connecting rod (602), the air collecting port (702) is opened at the top end of the limit seat (4), the first air delivery channel (703) is opened inside the limit seat (4), a first limit block (704) is movably connected inside the limit seat (4), and a first air delivery hole (705) is opened at one end of the first limit block (704).

2. The intelligent fixing device for hemodialysis catheter based on dynamic pressure feedback according to claim 1, wherein: The connecting rod (602) is rotatably connected to the limit seat (4). There are two groups of eccentric wheels (603), and the eccentric wheels (603) are symmetrically distributed about the central axis of the connecting rod (602). There are four groups of connecting seats (604), and the connecting seats (604) are symmetrically distributed about the central axis of the limit plate (605).

3. The intelligent fixing device for hemodialysis catheter based on dynamic pressure feedback according to claim 1, characterized in that: There are four groups of the first return springs (607), and the first return springs (607) are symmetrically distributed about the central axis of the limit plate (605). The first return springs (607) are used to squeeze the limit plate (605) and keep it in a trend of moving upward.

4. The intelligent fixing device for a hemodialysis catheter based on dynamic pressure feedback according to claim 1, wherein: An air delivery pipe (706) is communicated with the outside of the limit seat (4). A clamping block (707) is movably connected to the outside of the first limit block (704). An extension block (708) is fixed to the outside of the first limit block (704). A second return spring (709) is fixed to the bottom end of the extension block (708). A second air delivery channel (710) is opened inside the limit seat (4). A second limit block (711) is movably connected inside the limit seat (4). A second air delivery hole (712) is opened at the top end of the second limit block (711). A third return spring (713) is fixed to the outside of the second limit block (711). A third air delivery channel (714) is opened inside the limit seat (4). A driven rotor (715) is rotatably connected inside the limit seat (4).

5. The intelligent fixing device for a hemodialysis catheter based on dynamic pressure feedback according to claim 4, wherein: Two bumps are symmetrically distributed on the outer wall of the active rotor (701) with respect to the central axis of the active rotor (701). An air collecting cavity is formed inside the limit seat (4). The air collecting cavity is communicated with an air collecting port (702), a first air conveying channel (703) and a second air conveying channel (710). The outer wall of the first limit block (704) is attached to the inner wall of the limit seat (4). The first limit block (704) is slidably connected with the limit seat (4). The output end of the first air conveying channel (703) is communicated with a first air conveying hole (705). The output end of the first air conveying hole (705) is communicated with the limit seat (4). The first air conveying hole (705) is communicated with an air conveying pipe (706).

6. The intelligent fixing device for hemodialysis catheter based on dynamic pressure feedback according to claim 4, wherein: A clamping groove is formed at the top end of the limit seat (4). The clamping block (707) can be clamped in the clamping groove. The extension block (708) is slidably connected with the limit seat (4). The second return spring (709) is used to squeeze the extension block (708) and keep it in a moving trend upward.

7. The intelligent fixing device for hemodialysis catheter based on dynamic pressure feedback according to claim 4, wherein: A third air conveying channel (714) is further arranged on the limit seat (4). The second air conveying hole (712) can be simultaneously communicated with the second air conveying channel (710) and the third air conveying channel (714). The output end of the third air conveying channel (714) is communicated with the massage airbag (3).

8. The intelligent fixing device for a hemodialysis catheter based on dynamic pressure feedback according to claim 4, wherein: The outer wall of the second limit block (711) is attached to the inner wall of the limit seat (4). The second limit block (711) is slidably connected with the limit seat (4). The third return spring (713) is used to squeeze the second limit block (711) and keep it in a moving trend outward.

9. The intelligent fixing device for hemodialysis catheter based on dynamic pressure feedback according to claim 1, wherein: A flexible pressure sensor (2) is fixed to the inner wall of the strap (1). A dialysis catheter main body (5) is arranged at the top end of the limit seat (4). A magic tape hook surface (8) is fixed to the outside of the strap (1). A magic tape loop surface (9) is fixed to the outside of the strap (1). A battery (10) is fixed to the top end of the limit seat (4).

10. The intelligent fixing device for a hemodialysis catheter based on dynamic pressure feedback according to claim 9, characterized in that: A plurality of groups of flexible pressure sensors (2) are arranged. The flexible pressure sensors (2) are distributed at equal intervals. A plurality of groups of limit hooks are arranged on the surface of the magic tape hook surface (8). A plurality of groups of hook fluffs are arranged on the surface of the magic tape loop surface (9).

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