Intelligent air bag pressing type catheter fixing device based on pressure real-time feedback

Abstract

The invention belongs to the technical field of surgical fixing instruments, and particularly relates to an intelligent air bag pressing type catheter fixing device based on real-time pressure feedback, which comprises adhesive tapes arranged at intervals, an external controller and a pressure sensor for monitoring pressure signals in a catheter in real time, and further comprises two groups of clamping seats for limiting the catheter, each group of clamping seats comprises two clamping seats, a main extrusion wheel and an auxiliary extrusion wheel are arranged between the two clamping seats along a straight line, and a transmission mechanism is arranged outside each group of clamping seats; the air bag and the air supply mechanism are mutually communicated, and the air bag is connected with the transmission mechanism; when the air bag continuously expands, the transmission mechanism pushes the main extrusion wheel and the auxiliary extrusion wheel until the catheter is locked; the balloon is intermittently inflated. The pressure signal in the catheter can be used as an index, real-time adjustment is achieved on the premise that good fixation is guaranteed, the catheter is automatically pressed, and the near end and the far end of the drainage tube are effectively prevented from being blocked by retentates such as blood clots and viscous impurities.

Description

Technical Field

[0001] This invention belongs to the field of surgical fixation instrument technology, specifically relating to an intelligent airbag compression catheter fixation device based on real-time pressure feedback. Background Technology

[0002] The main function of an abdominal drainage tube is to drain fluid or blood from the abdominal cavity. It can effectively remove fluid or blood from the body, prevent them from accumulating in the abdominal cavity, and actively prevent fluid or blood from remaining in the body and causing infection or other complications.

[0003] During hepatobiliary surgery, the internal pressure of the abdominal drainage tube changes. Therefore, after the puncture is in place, the needle and the tube body are reinforced with tape to prevent them from falling off during negative pressure drainage.

[0004] When the drainage tube is fixed, its needle part is often attached to the skin by the inflatable air bladder. If the internal pressure is unstable (e.g., pulsed suction), the relatively flexible tube body will move slightly back and forth outside the body, gradually detaching from the tape and dressing. However, there is a time delay in manually adjusting the tube body, and the timeliness of dynamic adjustment is insufficient. Summary of the Invention

[0005] The purpose of this invention is to provide an intelligent airbag-type catheter fixation device based on real-time pressure feedback. It can use the internal pressure signal of the catheter as an indicator to achieve real-time adjustment while ensuring good fixation, and automatically press the catheter to effectively avoid blockage caused by blood clots, viscous impurities and other residues at the proximal and distal ends of the drainage tube.

[0006] The specific technical solution adopted by this invention is as follows: The intelligent airbag-based compression catheter fixation device based on real-time pressure feedback includes spaced adhesive pads, an external controller, and a pressure sensor for real-time monitoring of internal catheter pressure signals. It also includes: Two sets of clamping seats are used to limit the guide tube. Each set of clamping seats is configured with two clamping seats. A main extrusion wheel and a secondary extrusion wheel are arranged in a straight line between the two clamping seats. A transmission mechanism is provided on the outside of each set of clamping seats. An interconnected airbag and an air supply mechanism, wherein the airbag is connected to the transmission mechanism; As the airbag continues to inflate, the transmission mechanism pushes the main extrusion wheel and the auxiliary extrusion wheel until the conduit is locked. When the airbag inflates intermittently, the transmission mechanism drives the main extrusion wheel to periodically extrude the conduit, thereby achieving the peristalsis of the contents retained in the conduit.

[0007] As an optional solution, the top of the clamping seat is provided with a receiving groove, a guide slope and a limiting groove, the two guide slopes are respectively provided at both ends of the receiving groove, and the limiting groove is provided at the bottom of the receiving groove; The projection area of ​​the auxiliary extrusion wheel when it is pushed is set on the receiving groove, and the limiting groove is a cross-shaped polygon with the angle inclined to the direction of movement of the auxiliary extrusion wheel. When the secondary extrusion wheel presses against the edge of the guide tube, the limiting groove and the secondary extrusion wheel bite into the edge of the guide tube.

[0008] As an optional solution, the air supply mechanism includes a diversion pipe, an air storage tank, and a micro air pump connected in sequence to the airbag, wherein the micro air pump is electrically connected to the external controller; The diversion pipe is provided with two air guide valve ports at one end near the gas storage tank. One air guide valve port is used to connect to the gas storage tank, and the other air guide valve port is used to vent the airbag. When the pressure sensor detects an abnormal pressure signal, the air outlet of the air tank opens and the airbag inflates.

[0009] As an alternative, the transmission mechanism includes a cylinder, a piston head, a piston rod, and a rotating fork arranged in a straight line outside the clamping seat; The bottoms of the two cylinders are connected to each other, the airbag is fixed inside the cylinder and contacts the piston head, and the rotating fork is used to support the main extrusion roller and the auxiliary extrusion roller.

[0010] As an alternative, a rotating shaft is installed axially between the main extrusion wheel and the adjacent auxiliary extrusion wheel. Support bearings and limit rings are installed at intervals at both ends of the rotating shaft. The rotating shaft passes through both ends of the rotating fork from both sides of the main extrusion wheel. When the main extrusion roller is pushed, the support bearing and the limiting ring restrict the rotation shaft from both sides, thereby ensuring that the main extrusion roller is aligned with the guide tube.

[0011] As an optional solution, the catheter fixing device further includes a support tee, one interface of which is configured to accommodate the pressure sensor in a closed state, and the remaining interface is used to connect the catheter; When fluid flows through the catheter, the pressure sensor monitors the pressure signal of the fluid inside the catheter in real time and transmits it to the external controller. The closed interface of the supporting tee is provided with physiological saline for connecting the fluid inside the catheter.

[0012] As an alternative, the top of the clamping seat is fixed with a flange plate parallel to the receiving groove, and the flange plate has an inclined sliding hole; When the main extrusion roller and the auxiliary extrusion roller are pushed, the flange plate is used to bear the load, and the sliding hole is used to limit the movement direction of the main extrusion roller and the auxiliary extrusion roller.

[0013] As an alternative, two hinge seats are connected between the bottoms of the two cylinders, and bridges are fixed to the outer sides of both cylinders; The bridge frame has two bent ends, and each bend is connected to the end of the adjacent clamping seat. The bridge frame is used to maintain the piston rod's movement direction at a preset angle with the adjacent clamping seat.

[0014] As an optional solution, each of the clamping seats has a hinge shaft and a support bar installed at intervals on its bottom, and each pair of clamping seats in each group are hinged together by the hinge shaft; Each of the support bars has a vent hole for ventilation at the bottom of the clamping seat. When the clamping seat is installed, the gap between the support bars is used to accommodate part of the adhesive.

[0015] As an optional solution, an auxiliary air pipe is connected between the output end of the micro air pump and the air inlet of the air tank, and the air outlet of the air tank is connected in sequence to a main air pipe and an air supply tee. The air supply tee connects the two branch pipes to realize the synchronous air supply of the two airbags.

[0016] The technical effects achieved by this invention are as follows: This invention uses the internal pressure signal of the catheter as an indicator and the balloon as a power source to switch between the catheter pressing and locking states. It provides timely fixation when the catheter undergoes slight reciprocating motion due to negative pressure. Moreover, during long-term use, it can automatically press the catheter, effectively preventing the risk of catheter blockage caused by blood clots or other debris. The entire fixation device has a high degree of intelligence and is very easy to use in clinical practice.

[0017] The present invention forms a triangular structure on the outside of the adhesive to limit and support the catheter, so as to provide sufficient support when the patient turns over, and prevent the positive pressure inside the catheter from increasing instantaneously or even pushing out the needle due to the patient pressing the catheter and causing closure. This helps to improve the safety of fixing the catheter in the patient's body.

[0018] The fixation device of the present invention has multiple hinge points, and a certain degree of freedom is preset at the hinge points, which can better conform to the curved surface of the patient's body, thereby increasing the area fixed on the body surface and improving the reliability of fixation. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the fixing device and the catheter in the engaged state of the present invention; Figure 2 This is a side view of the fixing device and the catheter in the engaged state of the present invention; Figure 3 This is a side view of the fixing device of the present invention in an idle state; Figure 4 This is a schematic diagram of the clamping seat of the present invention in a hinged state; Figure 5 This is a side view of the clamping seat of the present invention in a hinged state; Figure 6 This is a schematic diagram of the structure of the clamping base of the present invention; Figure 7 This is a side view of the clamping base of the present invention; Figure 8 This is a schematic diagram of the cylinder of the present invention; Figure 9 This is a cross-sectional view of the cylinder of the present invention; Figure 10 This is a cross-sectional view of the tee supporting the present invention; Figure 11 This is a system block diagram of the external controller controlling the signal transmission status of the present invention.

[0020] The attached diagram lists the components represented by each number as follows: 1. Adhesive; 101. Main guide pipe; 102. Secondary guide pipe; 2. Clamping seat; 3. Main extrusion roller; 4. Secondary extrusion roller; 5. External controller; 6. Pressure sensor; 7. Support tee; 8. Receiving groove; 9. Guide slope; 10. Limiting groove; 11. Flange plate; 12. Sliding hole; 13. Hinge shaft; 14. Support bar; 15. Vent hole; 16. Rotating shaft; 17. Support bearing; 18. Limiting ring; 19. Cylinder; 20. Piston head; 21. Piston rod; 22. Rotating fork; 23. Hinge seat; 24. Cable tray; 25. Airbag; 26. Diverter pipe; 27. Air supply tee; 28. Main air pipe; 29. ​​Air storage tank; 30. Secondary air pipe; 31. Miniature air pump. Detailed Implementation

[0021] To make the objectives and advantages of this invention clearer, the invention will be specifically described below with reference to embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of the invention and does not strictly limit the scope of protection specifically claimed by the invention.

[0022] like Figures 1-11As shown, the intelligent airbag-type catheter fixation device based on real-time pressure feedback includes spaced adhesive patches 1, two sets of clamps 2, an external controller 5, and a pressure sensor 6. In hepatobiliary surgery, it is often necessary to drain accumulated fluid or blood. In this case, the main drainage tube 101 and the secondary drainage tube 102 are connected to form a catheter. The needle of the main drainage tube 101 is inserted into a designated location on the patient's body. Simultaneously, the pressure sensor 6 is used to monitor the internal pressure signal of the catheter in real time. Each set of clamps 2 consists of two clamps. Since the clamps 2 are pre-adheded to the outer surface of the adhesive patch 1, they can adhere to the patient's body through the adhesive surface of the adhesive patch 1, allowing the two sets of clamps 2 to limit the catheter from both sides. Figure 2 As shown, the fixing device and the conduit can enter the locking state. In this embodiment, a main extrusion wheel 3 and a secondary extrusion wheel 4 are arranged in a straight line between the two clamping seats 2. When the pressure sensor 6 detects an abnormal pressure signal, the airbag 25 starts to inflate. The external airbag 25 provides power to move the main extrusion wheel 3 and the secondary extrusion wheel 4, so that the two act on the conduit. As the airbag 25 continues to inflate, the main compression wheel 3 and the auxiliary compression wheel 4 move forward until they engage with the clamping seat 2 to lock the catheter. When the airbag 25 inflates intermittently, the main compression wheel 3, under the pushing action of the airbag 25, periodically squeezes the catheter, which can activate the automatic pressing function of the catheter and cause the fluid inside the catheter to surge periodically. This allows blood clots and other trapped materials inside the catheter to move with the fluid, achieving peristalsis of the trapped materials, facilitating their discharge, and reducing the risk of catheter blockage. For example, when the pressure signal is stable, the external controller 5 starts the intermittent mode, and the airbag 25 inflates briefly ten times at a preset frequency (with a 30-minute cycle).

[0023] In this way, by using the pressure signal inside the catheter as an indicator and the balloon 25 as a power source, it can switch between the catheter pressing and locking states. It can play a timely role in fixing the catheter when it makes slight reciprocating movements due to negative pressure. Moreover, during long-term use, it can automatically press the catheter, effectively preventing the risk of catheter blockage caused by blood clots or other residues. The entire fixation device has a high degree of intelligence and is very easy to use in clinical practice.

[0024] For example, when the pressure signal is consistently below / above a set threshold, or when there are drastic fluctuations, it is considered an abnormal signal.

[0025] See attached document Figure 1 and Figure 10 In order to ensure the real-time monitoring of pressure signals by pressure sensor 6, a support tee 7 is added to the secondary guide pipe 102 in this embodiment. One interface of the support tee 7 is set as closed. At the same time, pressure sensor 6 is firmly bonded inside the closed interface, and its wires pass through the closed interface. The remaining interface is used to connect to the conduit. When fluid flows through the catheter, the closed interface of the supporting tee 7 is provided with saline solution for connecting the fluid inside the catheter. The diaphragm of the pressure sensor 6 can deform in the positive direction as the pressure of the fluid and saline solution increases, and deform in the reverse direction when the pressure decreases, so that it can monitor the pressure signal of the fluid inside the catheter in real time and transmit it to the external controller 5 through the signal converter. The pressure sensor 6 can be a disposable medical pressure sensing device of model NPC-100 purchased from the market, and the external controller 5 can be a Mitsubishi series microcontroller, etc.

[0026] See attached document Figure 4 , Figure 6 and Figure 8 In order to tightly clamp the conduit, this embodiment provides a receiving groove 8, a guide slope 9 and a limiting groove 10 on the top of the clamping seat 2. The two guide slopes 9 are respectively set at both ends of the receiving groove 8, and the limiting groove 10 is set at the bottom of the receiving groove 8. The trajectory of the auxiliary extrusion wheel 4 when it is pushed is projected onto the receiving groove 8, so that the auxiliary extrusion wheel 4 is always facing the receiving groove 8. The limiting groove 10 is a cross-shaped polygon and the angle is inclined to the direction of movement of the auxiliary extrusion wheel 4. During operation, since the diameter of the main extrusion roller 3 is larger than that of the auxiliary extrusion roller 4, the main extrusion roller 3 first extrudes the middle of the main flow tube 101, causing the edge of the main flow tube 101 to extend towards the receiving grooves 8 on both sides until the auxiliary extrusion roller 4 enters the receiving groove 8 and then extrudes the extended part. When the auxiliary extrusion roller 4 presses against the edge of the main flow tube 101, the limiting groove 10 and the auxiliary extrusion roller 4 bite the edge of the main flow tube 101, realizing timely locking and fixing of the main flow tube 101, and effectively preventing the reciprocating movement of the guide tube.

[0027] See attached document Figure 2 , Figure 3 and Figure 11 The air supply mechanism includes a diversion pipe 26, an air tank 29 and a micro air pump 31 connected in sequence to the air bag 25. The micro air pump 31 is electrically connected to an external controller 5. The micro air pump 31 can be a D09 model ultra-small volume air pump. The diverter pipe 26 is equipped with a reversing valve that is electrically connected to the external controller 5 at one end near the gas storage tank 29. The reversing valve is equipped with two air guide valve ports and one air guide interface. One air guide valve port is used to connect to the gas storage tank 29, the other air guide valve port is used to exhaust the airbag 25, and the air guide interface is used to connect to the diverter pipe 26. When the pressure sensor 6 detects an abnormal pressure signal, within a preset time, the electric air valve at the outlet of the air tank 29 opens, and the reversing valve opens toward the air bag 25 and the air tank 29, so that the air bag 25 inflates within a specified time period, thereby providing power for the movement of the main extrusion wheel 3 and the auxiliary extrusion wheel 4. When airbag 25 needs to be deflated, the control valve opens to the outside, allowing the air inside airbag 25 to be expelled.

[0028] See attached document Figure 2 , Figure 3 and Figure 11 In this embodiment, an auxiliary air pipe 30 is connected between the output end of the micro air pump 31 and the air inlet of the air tank 29. When in use, the length of the auxiliary air pipe 30 can be increased so that the micro air pump 31 can be suspended outside the hospital bed. The air outlet of the air tank 29 is connected in sequence to the main air pipe 28 and the air supply tee 27. The air supply tee 27 is connected to two diversion pipes 26 to realize the synchronous air supply of the two airbags 25, and at the same time provide power to the two main compression wheels 3.

[0029] See attached document Figure 4 , Figure 8 and Figure 9 In order to limit the movement trajectory of the main extrusion wheel 3 and the auxiliary extrusion wheel 4, in this embodiment, a cylinder 19, a piston head 20, a piston rod 21 and a rotating fork 22 are arranged in a straight line outside the clamping seat 2; In this embodiment, the bottoms of the two cylinders 19 are connected to each other, and the air bladder 25 is bonded to the inside of the cylinder 19 and contacts the piston head 20. When the air bladder 25 is inflated, it expands inside the cylinder 19 and pushes the piston head 20, piston rod 21 and rotating fork 22 along the cylinder 19 axis. Since the rotating fork 22 supports the main extrusion wheel 3 and the auxiliary extrusion wheel 4, the main extrusion wheel 3 and the auxiliary extrusion wheel 4 move in a straight line when they are pushed, which can cooperate with the clamping seat 2 to complete the action of biting and locking the guide tube.

[0030] See attached document Figure 4 , Figure 5 and Figure 8 In this embodiment, two hinge seats 23 are connected between the bottom of the two cylinders 19, so that the two have a preset degree of freedom along the hinge axis 13, which makes it convenient to adjust the included angle of the two cylinders 19 along the curvature of the patient's body surface, so that the bottom surface of the two hinge seats 23 can make more comprehensive contact with the patient's body. Meanwhile, both cylinders 19 are fixed with bridges 24 by screws on their outer sides. Both ends of the bridges 24 are bent and the bends are connected to the ends of the adjacent clamping seats 2. The bridges 24 are used to maintain the piston rod 21 moving at a preset angle with the adjacent clamping seats 2.

[0031] As an optional embodiment, high-elastic rubber is bonded between the bends at both ends of the cable tray 24 and the ends of the adjacent clamping seats 2, so that they can undergo tangential torsional movement through the high-elastic rubber. When the two adjacent clamping seats 2 swing relative to each other, the cable tray 24 is prevented from breaking or deforming due to torsion.

[0032] See attached document Figure 4 , Figure 6 and Figure 7 The bottom of each clamping seat 2 is equipped with a hinge shaft 13 and a support bar 14 at intervals. Each pair of clamping seats 2 are hinged together by the hinge shaft 13. The two adjacent clamping seats 2 can swing relative to the hinge shaft 13 to fit the curved surface of the patient's body. Meanwhile, the bottom of the support strip 14 is glued to the outer surface of the adhesive patch 1. Each support strip 14 has a ventilation hole 15 for ventilation of the bottom of the clamping seat 2. When the clamping seat 2 is installed, part of the patient's skin is squeezed to the gap between the support strips 14, and the gap between the support strips 14 is used to accommodate part of the adhesive patch 1.

[0033] See attached document Figure 4 , Figure 6 and Figure 7 The clamping seat 2 has an integrally formed flange plate 11 that is parallel to the receiving groove 8. The flange plate 11 has an inclined sliding hole 12. Because the clamping seat 2 and the flange plate 11 form a triangular structure with high stability, even if the clamping seat 2 is pressed under the patient, the clamping seat 2 can maintain its shape and continue to support the catheter. When the main extrusion roller 3 and the auxiliary extrusion roller 4 are pushed, the flange plate 11 is used to bear the load, and the sliding hole 12 is used to limit the movement direction of the main extrusion roller 3 and the auxiliary extrusion roller 4, so that the main extrusion roller 3 can enter the receiving groove 8 after it descends, thus realizing the limiting function of the two rollers.

[0034] See attached document Figure 4 , Figure 8 and Figure 9 A rotating shaft 16 is installed along its axial direction between the main extrusion wheel 3 and the adjacent auxiliary extrusion wheel 4. Support bearings 17 and limiting rings 18 are installed at intervals at both ends of the rotating shaft 16. In this embodiment, the support bearings 17 are placed inside the sliding hole 12 to reduce the friction between the rotating shaft 16 and the sliding hole 12. The rotating shaft 16 passes through both ends of the rotating fork 22 from both sides of the main extrusion wheel 3 so that the two limiting rings 18 are respectively arranged outside the two clamping seats 2. When the main extrusion roller 3 is pushed, the support bearing 17 and the limiting ring 18 restrict the rotation shaft 16 from both sides, thereby making the main extrusion roller 3 face the guide tube. Since there is a safe distance between the limiting ring 18 and the flange plate 11, even if the two clamping seats 2 swing at a certain angle, the limiting ring 18 will not rub against the flange plate 11. At the same time, a part of the support bearing 17 is always left in the sliding hole 12 for support.

[0035] The working principle of this invention is as follows: When in use, the main flow tube 101 and the auxiliary flow tube 102 are connected to form a catheter. The needle of the main flow tube 101 is inserted into a designated position on the patient's body, and the pressure sensor 6 is used to monitor the internal pressure signal of the catheter in real time.

[0036] At the same time, the adhesive surface of the adhesive patch 1 is attached to the patient's body, so that the two sets of two clamps 2 limit the catheter from both sides. Since the clamps 2 and the flange plate 11 form a triangular structure with high stability, even if the clamps 2 are pressed under the patient's body, the clamps 2 can maintain their shape and continue to support the catheter.

[0037] When the pressure sensor 6 detects an abnormal pressure signal, within a preset time, the electric air valve at the outlet of the air tank 29 opens, and the reversing valve opens toward the air bag 25 and the air tank 29, so that the air bag 25 inflates within a specified time period, thereby providing power for the movement of the main extrusion wheel 3 and the auxiliary extrusion wheel 4. When airbag 25 needs to be deflated, the control valve opens to the outside, allowing the air inside airbag 25 to be expelled.

[0038] Then, since the diameter of the main extrusion roller 3 is larger than that of the secondary extrusion roller 4, the main extrusion roller 3 first extrudes the middle of the main flow tube 101, causing the edge of the main flow tube 101 to extend towards the receiving grooves 8 on both sides until the secondary extrusion roller 4 enters the receiving groove 8 and then extrudes the extended part. When the secondary extrusion roller 4 presses against the edge of the main flow tube 101, the limiting groove 10 and the secondary extrusion roller 4 bite the edge of the main flow tube 101, thereby achieving timely locking and fixing of the main flow tube 101.

[0039] The above description is merely an optional embodiment of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described or explained in this invention, unless otherwise specified or limited, shall be implemented according to conventional means in the art.

Claims

1. A smart airbag-type catheter fixation device based on real-time pressure feedback, comprising spaced adhesive pads (1), an external controller (5), and a pressure sensor (6) for real-time monitoring of the internal pressure signal of the catheter, characterized in that, Also includes: Two sets of clamping seats (2) are used to limit the conduit. Each set of clamping seats (2) consists of two clamping seats. A main extrusion wheel (3) and a secondary extrusion wheel (4) are arranged in a straight line between the two clamping seats (2). A transmission mechanism is provided on the outside of each set of clamping seats (2). An interconnected airbag (25) and air supply mechanism, wherein the airbag (25) is connected to the transmission mechanism; As the airbag (25) continues to inflate, the transmission mechanism pushes the main extrusion wheel (3) and the auxiliary extrusion wheel (4) until the conduit is locked; When the airbag (25) inflates intermittently, the transmission mechanism pushes the main extrusion wheel (3) to periodically extrude the conduit, thereby achieving the peristalsis of the contents retained in the conduit.

2. The catheter fixation device according to claim 1, characterized in that: The clamping seat (2) has a receiving groove (8), a guide slope (9) and a limiting groove (10) on its top. The two guide slopes (9) are respectively located at both ends of the receiving groove (8), and the limiting groove (10) is located at the bottom of the receiving groove (8). The projection area of ​​the auxiliary extrusion wheel (4) when it is pushed is set on the receiving groove (8), and the limiting groove (10) is a cross-shaped polygon with the angle inclined to the direction of movement of the auxiliary extrusion wheel (4). When the secondary extrusion wheel (4) presses against the edge of the conduit, the limiting groove (10) and the secondary extrusion wheel (4) bite the edge of the conduit.

3. The catheter fixation device according to claim 1, characterized in that: The air supply mechanism includes a diversion pipe (26), an air tank (29), and a micro air pump (31) connected in sequence to the air bag (25). The micro air pump (31) is electrically connected to the external controller (5). The diversion pipe (26) has two air guide valve ports at one end near the gas storage tank (29). One air guide valve port is used to connect to the gas storage tank (29), and the other air guide valve port is used to vent the air bag (25). When the pressure sensor (6) detects an abnormal pressure signal, it feeds back to the external controller (5) to control the air outlet of the gas tank (29) to open, and the air bag (25) to inflate.

4. The catheter fixation device according to claim 1, characterized in that: The transmission mechanism includes a cylinder (19), a piston head (20), a piston rod (21), and a rotating fork (22) arranged in a straight line outside the clamping seat (2). The bottoms of the two cylinders (19) are connected to each other, the air bag (25) is fixed inside the cylinder (19) and contacts the piston head (20), and the rotating fork (22) is used to support the main extrusion wheel (3) and the auxiliary extrusion wheel (4).

5. The catheter fixation device according to claim 4, characterized in that: A rotating shaft (16) is installed along the axial direction between the main extrusion wheel (3) and the adjacent auxiliary extrusion wheel (4). Support bearings (17) and limiting rings (18) are installed at intervals at both ends of the rotating shaft (16). The rotating shaft (16) passes through both ends of the rotating fork (22) from both sides of the main extrusion wheel (3). When the main extrusion wheel (3) is pushed, the support bearing (17) and the limiting ring (18) restrict the rotating shaft (16) from both sides, thereby making the main extrusion wheel (3) face the guide tube.

6. The catheter fixation device according to claim 1, characterized in that: It also includes a support tee (7), one interface of which is configured to accommodate the pressure sensor (6) in a closed state, and the remaining interface is used to connect the conduit; When fluid flows through the catheter, the pressure sensor (6) monitors the pressure signal of the fluid inside the catheter in real time and transmits it to the external controller (5). The closed interface of the support tee (7) is provided with physiological saline for connecting the fluid inside the catheter.

7. The catheter fixation device according to claim 2, characterized in that: The clamping seat (2) has a flange plate (11) that is parallel to the receiving groove (8) fixed on its top. The flange plate (11) has an inclined sliding hole (12). When the main extrusion roller (3) and the auxiliary extrusion roller (4) are pushed, the flange plate (11) is used to bear the load, and the sliding hole (12) is used to restrict the movement direction of the main extrusion roller (3) and the auxiliary extrusion roller (4).

8. The catheter fixation device according to claim 4, characterized in that: Two hinge seats (23) are connected between the bottoms of the two cylinders (19), and bridges (24) are fixed on the outer sides of the two cylinders (19). The bridge (24) is bent at both ends and the bends are connected to the ends of the adjacent clamping seats (2). The bridge (24) is used to maintain the movement direction of the piston rod (21) at a preset angle with the adjacent clamping seats (2).

9. The catheter fixation device according to claim 1, characterized in that: The bottom of each clamping seat (2) is equipped with a hinge shaft (13) and a support bar (14) at intervals, and each pair of clamping seats (2) are hinged together by the hinge shaft (13). Each of the support bars (14) is provided with a vent hole (15) for ventilation of the bottom of the clamping seat (2). When the clamping seat (2) is installed, the gap between the support bars (14) is used to accommodate part of the adhesive (1).

10. The catheter fixation device according to claim 3, characterized in that: A secondary air pipe (30) is connected between the output end of the micro air pump (31) and the air inlet of the air tank (29). The air outlet of the air tank (29) is connected in sequence to the main air pipe (28) and the air supply tee (27). The air supply tee (27) connects to the two diversion pipes (26) to realize the synchronous air supply of the two air bags (25).

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