Intelligent fixing device for hemodialysis catheter based on dynamic pressure feedback

Abstract

The application belongs to the technical field of medical equipment, and discloses a hemodialysis catheter intelligent fixing device based on dynamic pressure feedback, which comprises a binding belt, the top end of the binding belt is fixed with a limiting seat, a vibration mechanism is installed in the limiting seat, and a blowing mechanism is installed in the limiting seat. Through cooperation of the structures such as the micro motor, the connecting rod and the eccentric wheel, the device can fix the hemodialysis catheter body on the connecting seat through the limiting nut when the hemodialysis catheter body is placed in the patient's body for a long time for dialysis. At this time, the limiting plate is close to the first reset spring on both sides, the micro motor drives the connecting rod and the eccentric wheel to rotate, the eccentric wheel continuously contacts the top end of the limiting plate when rotating, and the limiting plate is deformed by being pressed down, and the first reset spring resets the limiting plate when the eccentric wheel is separated, so that the limiting plate vibrates, the probability of thrombosis is reduced, and the purpose of reducing the probability of thrombosis when the device is fixed is achieved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of medical equipment, and particularly relates to a blood dialysis catheter intelligent fixing device based on dynamic pressure feedback. BACKGROUND

[0002] The blood dialysis time is generally about 4 hours, and the process is relatively long, so the blood dialysis catheter needs to be fixed, and a conventional fixing mode is to directly stick the catheter on the skin of a patient by using adhesive tape, and the fixing mode has problems that the adhesive tape is easy to fall off and causes the patient to feel uncomfortable.

[0003] For example, the blood dialysis catheter fixing device disclosed in the publication No. CN208877659U comprises a transparent protection bag body, the bottom center of the transparent protection bag body is provided with an annular patch, the annular patch is sequentially provided with an annular color-changing card, an annular dry patch and a through hole for the central venous catheter from outside to inside, the central venous catheter is fixed by a magic tape inside and above the transparent protection bag body, the top of the transparent protection bag body forms two states of opening and closing through a movable opening, the bottom outer side of the transparent protection bag body is a sticky glue, and the sticky glue surrounds the annular patch, the annular patch is not attached to the skin at the wound, and the possibility of wound allergy and infection is reduced; the patch and the protection bag body are integrated through the sticky glue at the bottom of the bag body, the patch and the protection bag body are waterproof, the patient can easily take a bath, and the device is economical, practical, more beautiful and practical.

[0004] However, the device cannot monitor the dynamic pressure received by the patient in real time during actual use, and cannot relieve the discomfort of the patient through detection, and the probability of thrombosis is increased due to the long time of the catheter in the patient's body. SUMMARY

[0005] To solve the problems in the background, the application provides a blood dialysis catheter intelligent fixing device based on dynamic pressure feedback.

[0006] To achieve the above purpose, the application provides the following technical scheme: a blood dialysis catheter intelligent fixing device based on dynamic pressure feedback, comprising a bandage, the top end of the bandage is fixed with a limiting seat, a massage air bag is installed in the inside of the bandage, a vibration mechanism is installed in the inside of the limiting seat, and a blowing mechanism is installed in the inside of the limiting seat.

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

[0008] The blowing mechanism comprises a driving rotor, a gas collecting port and a first gas conveying channel, the driving rotor is fixed outside the connecting rod, the top end of the limiting seat is provided with the gas collecting port, the inside of the limiting seat is provided with the first gas conveying channel, the inside of the limiting seat is movably connected with a first limiting block, and one end of the first limiting block is provided with a first gas hole.

[0009] Preferably, the connecting rod and the limiting seat are rotationally connected, the eccentric wheels are provided in two groups, the eccentric wheels are symmetrically distributed about the central axis of the connecting rod, the connecting seats are provided in four groups, and the connecting seats are symmetrically distributed about the central axis of the limiting plate.

[0010] Preferably, the first reset spring is provided in four groups, the first reset spring is symmetrically distributed about the central axis of the limiting plate, and the first reset spring is used for pressing the limiting plate and making the limiting plate keep a moving trend upward.

[0011] Preferably, the outside of the limiting seat is communicated with a gas conveying pipe, the outside of the first limiting block is movably connected with a clamping block, the outside of the first limiting block is fixed with an extension block, the bottom end of the extension block is fixed with a second reset spring, the inside of the limiting seat is provided with a second gas conveying channel, the inside of the limiting seat is movably connected with a second limiting block, the top end of the second limiting block is provided with a second gas hole, the outside of the second limiting block is fixed with a third reset spring, the inside of the limiting seat is provided with a third gas conveying channel, and the inside of the limiting seat is rotationally connected with a driven rotor.

[0012] Preferably, the outer wall of the driving rotor is provided with two protruding blocks which are symmetrically distributed about the central axis of the driving rotor, the inside of the limiting seat is provided with a gas collecting cavity, the gas collecting cavity is communicated with the gas collecting port, the first gas conveying channel and the second gas conveying channel, the outer wall of the first limiting block is attached to the inner wall of the limiting seat, the first limiting block and the limiting seat are slidingly connected, the output end of the first gas conveying channel is communicated with the first gas hole, the output end of the first gas hole is communicated with the limiting seat, and the first gas hole is communicated with the gas conveying pipe.

[0013] Preferably, the top end of the limiting seat is provided with a clamping groove, the clamping block can be clamped in the clamping groove, the extension block and the limiting seat are slidingly connected, and the second reset spring is used for pressing the extension block and making the extension block keep a moving trend upward.

[0014] Preferably, the limiting seat is further provided with a third gas conveying channel, the second gas hole can be simultaneously communicated with the second gas conveying channel and the third gas conveying channel, and the output end of the third gas conveying channel is communicated with the massage air bag.

[0015] Preferably, the outer wall of the second limiting block is attached to the inner wall of the limiting seat, the second limiting block and the limiting seat are in sliding connection, and the third reset spring is used for pressing the second limiting block and making it keep a tendency of moving outward.

[0016] Preferably, the inner wall of the bandage is fixed with a flexible pressure sensor, the top end of the limiting seat is provided with a dialysis catheter body, the outside of the bandage is fixed with a Velcro hook surface, the outside of the bandage is fixed with a Velcro loop surface, and the top end of the limiting seat is fixed with a battery.

[0017] Preferably, the flexible pressure sensor is provided in several groups, the flexible pressure sensors are distributed at equal intervals, the surface of the Velcro hook surface is provided with several groups of limiting hooks, and the surface of the Velcro loop surface is provided with several groups of hook fluffs.

[0018] Compared with the prior art, the present application has the following beneficial effects:

[0019] The device can fix the dialysis catheter body on the connecting seat through the limiting nut when the dialysis catheter body is implanted in the patient's body for a long time for dialysis, the limiting plate is close to the first reset spring on both sides at this time, the micro motor is started to drive the connecting rod and the eccentric wheel to rotate, the eccentric wheel continuously contacts the top end of the limiting plate when rotating, and the limiting plate is deformed by being pressed downward, and the limiting plate is reset by the first reset spring when the eccentric wheel is disengaged, so that the limiting plate vibrates, and the dialysis catheter body as a whole vibrates at high frequency and conducts through the catheter wall, so that the probability of thrombosis is reduced, thereby achieving the purpose of reducing the probability of thrombosis when the device is fixed.

[0020] The device can communicate the second gas conveying channel, the second gas conveying hole and the third gas conveying channel after the first limiting block extrudes the second limiting block by pressing the first limiting block, and the first gas conveying channel, the first gas conveying hole and the gas conveying pipe are communicated when not pressed, the connecting rod rotates to drive the driving rotor to rotate, thereby driving the driven rotor to rotate in the opposite direction to extrude air, and the gas is conveyed through the gas collecting port, the one-way valve is arranged at the position of the gas collecting port, only air can be sucked, and no air can be discharged, the gas can be conveyed to the gas conveying pipe and then discharged when the first gas conveying channel is opened, the user can blow the catheter interface by holding the gas conveying pipe, residual blood or contaminants can be removed, the risk of cross infection can be reduced, and periodic micro air flow can stimulate the skin of the fixed device contact part to promote blood circulation, and the massage air bag can be inflated through the third gas conveying channel when the second gas conveying channel is opened, so that the massage air bag is inflated, and the skin surface of the patient is pressed and massaged, thereby achieving the purpose of conveniently switching the device to the blowing state and the inflation state for massage. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 Fig. 1 is a schematic diagram of the overall structure of the present application;

[0022] Figure 2 Fig. 2 is a schematic diagram of the overall bottom structure of the present application;

[0023] Figure 3 Fig. 3 is a schematic diagram of the overall rear structure of the present application;

[0024] Figure 4 Fig. 4 is a schematic diagram of the main body structure of the dialysis catheter of the present application;

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

[0026] Figure 6 Fig. 6 is a schematic diagram of the blowing mechanism structure of the present application;

[0027] Figure 7 Fig. 7 is a schematic diagram of the Figure 6 Fig. 8 is a schematic diagram of the enlarged partial section at A of Fig. 7;

[0028] Figure 8 Fig. 9 is a schematic diagram of the blowing mechanism channel switching structure of the present application.

[0029] Fig. 1 is a schematic diagram of the overall structure of the present application; Fig. 2 is a schematic diagram of the overall bottom structure of the present application; Fig. 3 is a schematic diagram of the overall rear structure of the present application; Fig. 4 is a schematic diagram of the main body structure of the dialysis catheter of the present application; Fig. 5 is a schematic diagram of the vibration mechanism structure of the present application; Fig. 6 is a schematic diagram of the blowing mechanism structure of the present application; Fig. 7 is a schematic diagram of the Fig. 8 is a schematic diagram of the enlarged partial section at A of Fig. 7; Fig. 9 is a schematic diagram of the blowing mechanism channel switching structure of the present application. Fig. 1: 1, strap; 2, flexible pressure sensor; 3, massage air bag; 4, limiting seat; 5, dialysis catheter main body; 6, vibration mechanism; 601, micro motor; 602, connecting rod; 603, eccentric wheel; 604, connecting seat; 605, limiting plate; 606, limiting nut; 607, first return spring; 7, blowing mechanism; 701, driving rotor; 702, gas collecting port; 703, first gas conveying channel; 704, first limiting block; 705, first gas conveying hole; 706, gas conveying pipe; 707, clamping block; 708, extension block; 709, second return spring; 710, second gas conveying channel; 711, second limiting block; 712, second gas conveying hole; 713, third return spring; 714, third gas conveying channel; 715, driven rotor; 8, hook face of Velcro; 9, hair face of Velcro; 10, battery. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0031] As Figures 1 to 8As shown in the figure, the present application provides a kind of based on dynamic pressure feedback's hemodialysis catheter intelligent fixing device, including bandage 1, the top of bandage 1 is fixed with limit seat 4, massage air bag 3 is installed in the inside of bandage 1, vibration mechanism 6 is installed in the inside of limit seat 4, blowing mechanism 7 is installed in the inside of limit seat 4, flexible pressure sensor 2 is fixed on the inner wall of bandage 1, dialysis catheter main body 5 is arranged at the top of limit seat 4, magic tape hook face 8 is fixed on the outside of bandage 1, magic tape hair face 9 is fixed on the outside of bandage 1, flexible pressure sensor 2 is provided with several groups, flexible pressure sensor 2 is equidistant distribution, the surface of magic tape hook face 8 is provided with several groups of limit hook, the surface of magic tape hair face 9 is provided with several groups of hook fluff, battery 10 is fixed at the top of limit seat 4.

[0032] Adopt the above scheme: through magic tape hook face 8 and magic tape hair face 9, bandage 1 is bound on the patient's body as a whole, it is convenient to fix dialysis catheter main body 5, and make flexible pressure sensor 2 contact the skin of patient, so that it can detect the pressure received by patient, when local pressure of patient is abnormal, such as muscle stiffness or swelling leads to pressure rise, the resistance value of conductive material in sensor changes accordingly, is converted into electrical signal by circuit, and then the pressure received by patient is detected, when index is abnormal, user can inflate massage air bag 3, so that it expands, battery 10 can power the device.

[0033] As shown in the figure, Figures 1 to 8 Vibration mechanism 6 includes micro motor 601, connecting rod 602 and eccentric wheel 603, micro motor 601 is fixed in the inside of limit seat 4, micro motor 601 is fixed with connecting rod 602 outside, connecting rod 602 is fixed with eccentric wheel 603 outside, connecting seat 604 is fixed at the top of limit seat 4, limit plate 605 is arranged outside connecting seat 604, connecting rod 602 and limit seat 4 are rotationally connected, eccentric wheel 603 is provided with two groups, eccentric wheel 603 is symmetrically distributed about the central axis of connecting rod 602, connecting seat 604 is provided with four groups, connecting seat 604 is symmetrically distributed about the central axis of limit plate 605.

[0034] As shown in the figure, Figures 1 to 8 Limit nut 606 is threadedly connected at the top of connecting seat 604, first return spring 607 is fixed at the top of limit seat 4, first return spring 607 is provided with four groups, first return spring 607 is symmetrically distributed about the central axis of limit plate 605, first return spring 607 is used to extrude limit plate 605, and make it keep the trend of moving upward.

[0035] Adopt the above scheme: by starting the micro motor 601 drive connecting rod 602 and eccentric wheel 603 rotation, make the eccentric wheel 603 rotation constantly contact the top of the limit plate 605, down pressure produces deformation, and in the eccentric wheel 603, the first reset spring 607 will limit plate 605 reset, make the limit plate 605 produce vibration, in turn make the dialysis catheter main body 5 whole body produce high frequency vibration and through the catheter wall conduction, reduce the formation probability of thrombosis.

[0036] As shown in Figures 1 to 8 , the blowing mechanism 7 includes a driving rotor 701, a gas collecting port 702 and a first gas conveying passage 703, the driving rotor 701 is fixed outside the connecting rod 602, the top of the limiting seat 4 is provided with the gas collecting port 702, the inside of the limiting seat 4 is provided with the first gas conveying passage 703, the inside of the limiting seat 4 is movably connected with the first limiting block 704, one end of the first limiting block 704 is provided with the first gas hole 705, the outside of the limiting seat 4 is connected with the gas pipe 706, the outer wall of the driving rotor 701 is provided with two protrusions which are symmetrically distributed about the central axis of the driving rotor 701, the inside of the limiting seat 4 is provided with a gas collecting cavity, the gas collecting cavity is in communication with the gas collecting port 702, the first gas conveying passage 703 and the second gas conveying passage 710, the outer wall of the first limiting block 704 is attached to the inner wall of the limiting seat 4, the first limiting block 704 and the limiting seat 4 are slidingly connected, the output end of the first gas conveying passage 703 is in communication with the first gas hole 705, the output end of the first gas hole 705 is connected with the limiting seat 4, and the first gas hole 705 is in communication with the gas pipe 706.

[0037] As shown in Figures 1 to 8 , the outside of the first limiting block 704 is movably connected with the clamping block 707, the outside of the first limiting block 704 is fixedly connected with the extension block 708, the bottom end of the extension block 708 is fixedly connected with the second reset spring 709, the top of the limiting seat 4 is provided with a clamping groove, the clamping block 707 can be clamped in the clamping groove, the extension block 708 and the limiting seat 4 are slidingly connected, and the second reset spring 709 is used for pressing the extension block 708 and making it keep a tendency of moving upward.

[0038] As shown in Figures 1 to 8 , the inside of the limiting seat 4 is provided with the second gas conveying passage 710, the inside of the limiting seat 4 is movably connected with the second limiting block 711, the top of the second limiting block 711 is provided with the second gas hole 712, the outside of the second limiting block 711 is fixedly connected with the third reset spring 713, the inside of the limiting seat 4 is provided with the third gas conveying passage 714, the inside of the limiting seat 4 is rotatably connected with the driven rotor 715, and the limiting seat 4 is further provided with the third gas conveying passage 714. The second gas hole 712 can be in communication with the second gas conveying passage 710 and the third gas conveying passage 714 at the same time, and the output end of the third gas conveying passage 714 is in communication with the massage air bag 3.

[0039] Adopt the above scheme: through the connecting rod 602 rotation drive main rotor 701 rotation, and then through the main rotor 701 drive driven rotor 715 reverse rotation extrusion air, and through the gas collecting port 702 on the gas delivery, gas collecting port 702 position is provided with check valve, only can absorb gas, can't exhaust, first gas delivery channel 703 channel opening, can deliver gas to gas delivery pipe 706 after discharge, user can through handheld gas delivery pipe 706 blow down pipe interface, remove residual blood or contaminant, reduce the risk of cross infection, the second gas delivery channel 710 channel opening, can be inflated through the third gas delivery channel 714 to massage air bag 3, make it swell, and then press and massage the skin surface of the patient.

[0040] The working principle and use process of the present application: the whole bandage 1 is bound on the patient's body through the magic tape hook surface 8 and the magic tape wool surface 9, which is convenient for fixing the dialysis catheter body 5 and makes the flexible pressure sensor 2 contact the patient's skin, so that it can detect the pressure received by the patient, and cooperate with the massage air bag 3 to carry out targeted massage, and the dialysis catheter body 5 is fixed on the connecting seat 604 through the limiting nut 606, at this time the limiting plate 605 is close to the first reset spring 607 on both sides, the micro motor 601 drives the connecting rod 602 and the eccentric wheel 603 to rotate, so that the eccentric wheel 603 constantly contacts the top end of the limiting plate 605 when rotating, and the limiting plate 605 is deformed, and when the eccentric wheel 603 is separated, the first reset spring 607 resets the limiting plate 605, so that the limiting plate 605 vibrates, and then the whole dialysis catheter body 5 vibrates at high frequency and conducts through the catheter wall, destroys the adsorption process of fibrinogen on the catheter surface, and reduces the probability of thrombosis, and when the first limiting block 704 is pressed, the first limiting block 704 extrudes the second limiting block 711, and the second air conveying channel 710, the second air conveying hole 712 and the third air conveying channel 714 are communicated, and when it is not pressed, the first air conveying channel 703, the first air conveying hole 705 and the air conveying pipe 706 are communicated, the connecting rod 602 rotates to drive the driving rotor 701 to rotate, and then the driving rotor 701 drives the driven rotor 715 to rotate in the opposite direction to extrude air, and the air is conveyed through the air inlet 702, the air inlet 702 is provided with a one-way valve, which can only inhale air and cannot exhaust air, when the first air conveying channel 703 is opened, the gas can be conveyed to the air conveying pipe 706 and then discharged, the user can blow the catheter interface through the hand-held air conveying pipe 706 to remove residual blood or pollutants and reduce the risk of cross infection, and periodic micro air flow stimulates the skin of the contact part of the fixing device to promote blood circulation, when the second air conveying channel 710 is opened, the third air conveying channel 714 can inflate the massage air bag 3 to make it swell, and then press and massage the surface of the patient's skin, the user fixes the card block 707 and the limiting seat 4 through the clamping connection after pressing the switching channel, and when it is needed to switch to the blowing state, the card block 707 is separated, the second reset spring 709 moves the extension block 708 and the first limiting block 704 upward as a whole, so that the second limiting block 711 is no longer extruded, at this time the second limiting block 711 is reset through the third reset spring 713, and the switching of the channel is completed.

[0041] When the local pressure of the patient is abnormal, such as muscle stiffness or swelling leading to increased pressure, the resistance value of the conductive material in the sensor changes accordingly, which is converted into an electrical signal through a circuit, and then the pressure received by the patient is detected, when the index is abnormal, the user can inflate the massage air bag 3 to make it swell, and then press and massage the surface of the patient's skin, so as to relieve the pressure.

[0042] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting; it is not intended to exclude myriad other embodiments of the present application that other inventors can develop based on the same general inventive concepts embodied by the described embodiments. That is, although the present application is described in terms of particular embodiments and illustrative figures, it should be apparent that the scope of the present application is not limited to these specific embodiments.

[0043] While the embodiments of the application have been shown and described herein, it is to be understood that the scope of the application, jointly pointed out in the appended claims, is not limited to the details of the embodiments shown, and that various changes, modifications, substitutions and alterations can be made thereto without departing from the spirit and scope of the application as defined in the following claims and their equivalents.

Claims

1. A dynamic pressure feedback based intelligent fixing device for hemodialysis catheter comprising a strap (1), characterized in that: The top end of the binding band (1) is fixed with a limiting seat (4), the inside of the binding band (1) is provided with a massage air bag (3), the inside of the limiting seat (4) is provided with a vibrating mechanism (6), and the inside of the limiting seat (4) is provided with a blowing mechanism (7); The vibrating mechanism (6) comprises a micro motor (601), a connecting rod (602) and an eccentric wheel (603), the micro motor (601) is fixed in the inside of the limiting seat (4), the outside of the micro motor (601) is fixed with the connecting rod (602), the outside of the connecting rod (602) is fixed with the eccentric wheel (603), the top end of the limiting seat (4) is fixed with a connecting seat (604), the outside of the connecting seat (604) is provided with a limiting plate (605), the top end of the connecting seat (604) is threadedly connected with a limiting nut (606), and the top end of the limiting seat (4) is fixed with a first reset spring (607); The blowing mechanism (7) comprises a driving rotor (701), a gas collecting port (702) and a first gas conveying channel (703), the driving rotor (701) is fixed outside the connecting rod (602), the top end of the limiting seat (4) is provided with the gas collecting port (702), the inside of the limiting seat (4) is provided with the first gas conveying channel (703), and the inside of the limiting seat (4) is movably connected with a first limiting block (704); one end of the first limiting block (704) is provided with a first gas hole (705); The outside of the limiting seat (4) is communicated with a gas conveying pipe (706), the outside of the first limiting block (704) is movably connected with a clamping block (707), the outside of the first limiting block (704) is fixed with an extension block (708), the bottom end of the extension block (708) is fixed with a second reset spring (709), the inside of the limiting seat (4) is provided with a second gas conveying channel (710), the inside of the limiting seat (4) is movably connected with a second limiting block (711), the top end of the second limiting block (711) is provided with a second gas hole (712), the outside of the second limiting block (711) is fixed with a third reset spring (713), the inside of the limiting seat (4) is provided with a third gas conveying channel (714), and the inside of the limiting seat (4) is rotatably connected with a driven rotor (715); The outer wall of the driving rotor (701) is provided with two protrusions which are symmetrically distributed about the central axis of the driving rotor (701), the inside of the limiting seat (4) is provided with a gas collecting cavity, the gas collecting cavity is communicated with the gas collecting port (702), the first gas conveying channel (703) and the second gas conveying channel (710), the outer wall of the first limiting block (704) is attached to the inner wall of the limiting seat (4), the first limiting block (704) and the limiting seat (4) are slidably connected, the output end of the first gas conveying channel (703) is communicated with the first gas hole (705), the output end of the first gas hole (705) is communicated with the limiting seat (4), and the first gas hole (705) is communicated with the gas conveying pipe (706); The limiting seat (4) is further provided with a third gas conveying channel (714), the second gas conveying hole (712) can communicate with the second gas conveying channel (710) and the third gas conveying channel (714) at the same time, and the output end of the third gas conveying channel (714) communicates with the massage air bag (3).

2. The dynamic pressure feedback based hemodialysis catheter smart securement device of claim 1, wherein: The connecting rod (602) and the limiting seat (4) are rotationally connected, the eccentric wheel (603) is provided with two groups, the eccentric wheel (603) is symmetrically distributed about the central axis of the connecting rod (602), the connecting seat (604) is provided with four groups, and the connecting seat (604) is symmetrically distributed about the central axis of the limiting plate (605).

3. The dynamic pressure feedback based hemodialysis catheter smart securement device of claim 1, wherein: The first reset spring (607) is provided with four groups, the first reset spring (607) is symmetrically distributed about the central axis of the limiting plate (605), the first reset spring (607) is used for pressing the limiting plate (605) and keeping the upward movement trend of the limiting plate (605).

4. The dynamic pressure feedback based hemodialysis catheter smart securement device of claim 1, wherein: The top end of the limiting seat (4) is provided with a clamping groove, the clamping block (707) can be clamped in the clamping groove, the extension block (708) and the limiting seat (4) are slidably connected, and the second reset spring (709) is used for pressing the extension block (708) and keeping the upward movement trend of the extension block (708).

5. The dynamic pressure feedback based hemodialysis catheter smart securement device of claim 1, wherein: The outer wall of the second limiting block (711) is attached to the inner wall of the limiting seat (4), the second limiting block (711) and the limiting seat (4) are slidably connected, and the third reset spring (713) is used for pressing the second limiting block (711) and keeping the outward movement trend of the second limiting block (711).

6. The dynamic pressure feedback based hemodialysis catheter smart securement device of claim 1, wherein: The inner wall of the bandage (1) is fixed with a flexible pressure sensor (2), the top end of the limiting seat (4) is provided with a dialysis catheter body (5), the outer part of the bandage (1) is fixed with a Velcro hook surface (8), the outer part of the bandage (1) is fixed with a Velcro loop surface (9), and the top end of the limiting seat (4) is fixed with a battery (10).

7. The dynamic pressure feedback based hemodialysis catheter smart securement device of claim 6, wherein: The flexible pressure sensor (2) is provided with a plurality of groups, the flexible pressure sensor (2) is distributed at equal intervals, the surface of the Velcro hook surface (8) is provided with a plurality of limiting hooks, and the surface of the Velcro loop surface (9) is provided with a plurality of hook filaments.

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