A smart monitoring system based on venous catheters

Abstract

This invention provides an intelligent monitoring system based on intravenous catheters. Utilizing the principle of triangulation, three position sensors are installed. The first position sensor is located at the output end of the intravenous catheter, while the second and third position sensors are fixed to the patient's skin near the first sensor. This fixes the second and third position sensors relative to the patient's body. When the first position sensor changes position within the patient's body, the central processing unit can promptly detect and report this change, allowing medical staff to identify and address the issue immediately. This invention achieves real-time monitoring of the position of the intravenous catheter's output end through an intelligent monitoring system. Triangulation significantly improves positioning accuracy, ensuring medical staff can accurately understand the catheter's position within the patient's body, facilitating timely detection and intervention, and greatly enhancing the safety and effectiveness of intravenous catheter use.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and more specifically to an intelligent monitoring system based on a venous catheter. Background Technology

[0002] Intravenous medication administration and parenteral nutrition are among the most common procedures in modern healthcare. Medium- to long-term intravenous catheters, such as PICC (peripherally inserted central catheter) and PORT (port-in-place), are widely used in intravenous therapy, enabling long-term infusion, blood transfusion, blood sampling, administration of irritating medications and effervescent agents, and monitoring of central venous pressure. The catheter tip reaches the junction of the superior vena cava and the right atrium, allowing for extended placement time, protecting peripheral blood vessels, and reducing the pain of repeated punctures.

[0003] However, the use of intravenous catheters still presents several challenges. These catheters are often left in place for extended periods, and during this time, limb movement or increased intrathoracic pressure can cause catheter tip displacement, leading to serious complications such as catheter-related venous thrombosis and catheter occlusion. The puncture site also carries a risk of phlebitis and infection. Because the catheter is embedded within the patient's body, visual inspection alone cannot accurately determine its position, hindering physician monitoring and assessment, thus reducing treatment efficiency and safety. These complications can lead to unplanned catheter removal, disrupting treatment and, in severe cases, even threatening the patient's life.

[0004] Therefore, how to monitor the position of venous catheters and predict infection and phlebitis are problems that urgently need to be solved by those skilled in the art. Summary of the Invention

[0005] The purpose of this invention is to provide an intelligent monitoring system based on venous catheters to solve the problems of the inability to monitor the position and status of venous catheters in the prior art, realize real-time monitoring of the position of the output end of the venous catheter, and ensure that medical staff can accurately understand the position and status of the venous catheter in the patient's body.

[0006] To achieve the above objectives, the present invention provides an intelligent monitoring system based on a venous catheter, comprising a venous catheter, a position monitoring module, and a central processing unit, wherein the position monitoring module is signal-connected to the central processing unit.

[0007] Intravenous catheters are used to insert into a patient's body, including the outlet end of the catheter located inside the patient's body;

[0008] The position monitoring module includes a first position sensor, a second position sensor, and a third position sensor arranged in a triangle. The first position sensor is fixed at the output end of the tube, and the second and third position sensors are fixed on the patient's skin near the first position sensor, with the relative positions of the second and third position sensors being fixed.

[0009] The central processing unit is used to determine the position status of the first position sensor based on the position information sensed by the first position sensor, the second position sensor, and the third position sensor, respectively.

[0010] According to the present invention, a smart monitoring system based on a venous catheter is provided, wherein the first position sensor is a microchip, and the first position sensor is integrated into the inside or outside of the tube wall at the output end of the tube by printing.

[0011] According to the present invention, an intelligent monitoring system based on a venous catheter further includes a first fixation member and a second fixation member; a second position sensor is fixed to the first fixation member and detachably fixed to the patient's skin through the first fixation member, so that the second position sensor is fixed relative to the patient's body; and a third position sensor is fixed to the second fixation member and detachably fixed to the patient's skin through the second fixation member, so that the third position sensor is fixed relative to the patient's body.

[0012] According to the present invention, an intelligent monitoring system based on a venous catheter is provided. The venous catheter further includes a tube input end and a sealing element for closing the tube input end. The tube input end is used to connect to an external infusion device. The tube input end is located inside or outside the patient's body. When it is necessary to inject into the patient's body, the external infusion device is connected to the sealing element to communicate into the venous catheter. After the injection is completed, the external infusion device is removed and the sealing element returns to a closed state.

[0013] The present invention provides an intelligent monitoring system based on a venous catheter, which further includes a base; the base is fixedly connected to the inlet end of the catheter body. When the inlet end of the catheter body is inside the patient's body, the base is embedded under the patient's skin. When the inlet end of the catheter body is outside the patient's body, the base is detachably fixed to the patient's skin.

[0014] According to the present invention, an intelligent monitoring system based on a venous catheter is provided, wherein when the venous catheter is inserted into the patient's body, a wound is created on the patient's body, and the inlet end of the catheter and the base are located near the wound.

[0015] The present invention provides an intelligent monitoring system based on a venous catheter, which further includes a temperature sensor; the temperature sensor is integrated on the venous catheter at a location near the wound to sense the temperature at the wound, and the temperature sensor is signal-connected to a central processing unit to transmit the sensed temperature to the central processing unit.

[0016] According to the present invention, an intelligent monitoring system based on a venous catheter further includes a power supply module and a wireless communication module; the central processing unit, the power supply module, and the wireless communication module are all integrated on the base. The power supply module is used to provide power to the intelligent monitoring system, the wireless communication module is connected to the central processing unit by signal, and the wireless communication module is used to communicate with external intelligent devices by data.

[0017] When the tube input end is located outside the patient's body, the intelligent monitoring system also includes a display module, which is integrated on the base and connected to the central processing unit.

[0018] According to the present invention, a smart monitoring system based on a venous catheter is provided. When the first position sensor is located within the safe activity area, the central processing unit determines that the position status of the first position sensor is normal. When the first position sensor is located outside the safe activity area, the central processing unit determines that the position status of the first position sensor is abnormal. The safe activity area is a preset distance extending outward from the first position sensor as the center.

[0019] The intelligent monitoring system based on a venous catheter provided by the present invention further includes an alarm module; when the central processing unit determines that the position status of the first position sensor is abnormal, the alarm module provides an alarm through light, sound and / or vibration.

[0020] This invention provides an intelligent monitoring system based on intravenous catheters. Utilizing the principle of triangulation, three position sensors are installed. The first position sensor is positioned at the output end of the intravenous catheter, while the second and third position sensors are fixed to the patient's skin near the first sensor. This fixes the second and third position sensors relative to the patient's body. When the first position sensor changes position within the patient's body, the central processing unit can promptly detect and report this change, allowing medical staff to identify and address the issue immediately. This invention achieves real-time monitoring of the position of the intravenous catheter's output end through an intelligent monitoring system. Triangulation significantly improves positioning accuracy, ensuring medical staff can accurately understand the catheter's position within the patient's body, facilitating timely detection and intervention, and greatly enhancing the safety and effectiveness of intravenous catheter use. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0022] In the attached diagram:

[0023] Figure 1 This is a schematic diagram of the intelligent monitoring system based on a venous catheter according to the present invention;

[0024] Figure 2 This is a schematic cross-sectional view of a venous catheter inserted into a patient's body according to an embodiment of the present invention;

[0025] Figure 3 This is a cross-sectional schematic diagram of a venous catheter inserted into a patient's body according to another embodiment of the present invention. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0027] The following detailed description of some embodiments of the present invention will be provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0028] Please also refer to Figure 1 , Figure 2 and Figure 3 This invention provides an intelligent monitoring system 10 based on a venous catheter (hereinafter referred to as the intelligent monitoring system 10). The intelligent monitoring system 10 includes a venous catheter 12, a position monitoring module 14, and a central processing unit 16. The position monitoring module 14 is signal-connected to the central processing unit 16. The venous catheter 12 is inserted into a patient's body 18, for example, into a vein 20 within the patient's body 18, to deliver medication or nutrients into the patient's body 18 in liquid form. The venous catheter 12 includes a tube output end 22 and a tube input end 24 located within the patient's body 18. The tube input end 24 can be located inside or outside the patient's body 18. The tube input end 24 is used to connect to other catheters or directly connect to a storage container. The storage container contains the medication or nutrients to be delivered into the patient's body 18, allowing the medication or nutrients to reach the patient's body 18 via the venous catheter 12.

[0029] The position monitoring module 14 includes a first position sensor 26, a second position sensor 28, and a third position sensor 30 arranged in a triangle. The first position sensor 26 is fixed at the tube output end 22; when the tube output end 22 changes position, the first position sensor 26 changes position accordingly. The second position sensor 28 and the third position sensor 30 are both fixed on the patient's skin near the first position sensor 26, and their relative positions are fixed. Preferably, the second position sensor 28 and the third position sensor 30 are spaced apart and positioned at the same location on the patient's body 18. The relative positions of the second position sensor 28 and the third position sensor 30 should remain essentially unchanged when the patient performs normal limb movements, such as walking, bending their arms, or bending over. For example, the second position sensor 28 and the third position sensor 30 can both be positioned on the patient's torso or on the patient's head.

[0030] The first position sensor 26, the second position sensor 28, and the third position sensor 30 are each connected to the central processing unit 16 to transmit their sensed position information. The central processing unit 16 calculates and determines the position status of the first position sensor 26 based on the received information, such as whether its position has changed, the distance of the change, and whether its position is normal. When the first position sensor 26 changes position within the patient's body 18, the central processing unit 16 can promptly detect and report this, allowing medical personnel to identify and respond immediately. During catheterization, the output end 22 of the venous catheter may shift due to patient limb movement or increased intrathoracic pressure, leading to serious complications such as catheter-related venous thrombosis and catheter blockage. This invention uses an intelligent monitoring system 10 to monitor the position of the output end 22 of the venous catheter 12 in real time. Triangulation can greatly improve the accuracy of positioning, ensuring that medical staff can accurately understand the position of the venous catheter 12 in the patient's body 18. This facilitates timely detection and treatment of complications caused by the shift of the output end 22, greatly improving the safety and effectiveness of the use of the venous catheter 12, and avoiding unplanned extubation due to complications that could affect treatment or even threaten the patient's life.

[0031] Specifically, the triangulation principle is understood as follows: the positions of the first position sensor 26, the second position sensor 28, and the third position sensor 30 form a triangle. After the intravenous catheter 12 is inserted into the patient's body 18, the positions of the three position sensors are the initial positions. At this time, the distance and angle between the first position sensor 26, the second position sensor 28, and the third position sensor 30 are all information related to the initial positions. This information is stored in the central processing unit 16 and used as a comparison benchmark. The positions of the second position sensor 28 and the third position sensor 30 are fixed relative to the patient's body 18. When the position of the first position sensor 26 shifts within the patient's body 18, the distance and angle between the first position sensor 26 and the second position sensor 28 change, and the distance and angle between the first position sensor 26 and the third position sensor 28 also change. The three position sensors transmit their respective position information to the central processing unit 16. After receiving the position information, the central processing unit 16 compares it with the initial position information and obtains an abnormal signal result indicating that the first position sensor 26 has changed position, thereby realizing real-time monitoring of the position of the catheter output end 22.

[0032] It should be understood that in some other embodiments, when the first position sensor 26 does not change position, but the second position sensor 28 or the third position sensor 30 changes position, it indicates that the second position sensor 28 or the third position sensor 30 has unexpectedly moved out of its initial fixed position. After the central processing unit 16 compares the information with the original position information, it will also obtain an abnormal signal result indicating that the second position sensor 28 or the third position sensor 30 has changed position. This abnormal signal result may be different from the signal result when the first position sensor 26 changes position, so as to facilitate the distinction by medical staff.

[0033] It should be noted that when only one position sensor is used for position monitoring, such as setting a position sensor at the output end of an intravenous catheter, the position sensor has no reference point. According to existing positioning technology, the position sensor can only monitor the position of the patient's body, but cannot pinpoint the exact location of the position sensor itself. When two position sensors are used for position monitoring, such as setting a first position sensor at the output end of an intravenous catheter and a second position sensor at other parts of the patient's body, although the second position sensor serves as a reference point, some problems still exist. For example, in the initial position, the first position sensor is located on a circle centered on the second position sensor. When the first position sensor moves on this circle, the distance between the first and second position sensors remains unchanged, and the central processing unit cannot determine that the first position sensor has shifted. Therefore, this invention utilizes triangulation, selecting two reference points (the second position sensor 28 and the third position sensor 30), and determines the positional change of the first position sensor 26 by measuring the changes in distance and angle between the three reference points, which can greatly improve the monitoring accuracy.

[0034] In this invention, the first position sensor 26 can be a microchip, such as a GPS microchip, which can be integrated on the tube output end 22 by means of printing, for example, integrated inside or outside the tube wall at the tube output end 22. The second position sensor 28 and the third position sensor 30 can be conventional position sensors.

[0035] In the illustrated embodiment, the intelligent monitoring system 10 further includes a first fixing member 32 and a second fixing member 34, which are, for example, medical tape. A second position sensor 28 is fixed to the first fixing member 32 and detachably fixed to the patient's skin via the first fixing member 32, thereby fixing the second position sensor 28 relative to the patient's body 18. The second position sensor 28 can be disposed on the side of the first fixing member 32 facing the patient's body 18 or disposed inside the first fixing member 32, which is adhesively fixed to the patient's skin. A third position sensor 30 is fixed to the second fixing member 34 and detachably fixed to the patient's skin via the second fixing member 34, thereby fixing the third position sensor 30 relative to the patient's body 18. The third position sensor 30 can be disposed on the side of the second fixing member 34 facing the patient's body 18 or disposed inside the second fixing member 34, which is adhesively fixed to the patient's skin.

[0036] In this invention, the venous catheter 12 can be used in scenarios requiring medium to long-term placement in the patient's body, such as the application of PICC (peripherally inserted central catheter) and PORT (port-of-care) in intravenous therapy for cancer patients. It can perform functions such as long-term infusion, blood transfusion, blood sampling, infusion of irritating drugs, vesicants, and monitoring of central venous pressure. During puncture, the catheter's output end 22 reaches the junction of the superior vena cava and the right atrium (CAJ point). The long placement time protects the patient's peripheral blood vessels, reducing the pain of repeated punctures. For example, the venous catheter 12 can be inserted into a vein 20 from the patient's armpit, then through the shoulder to the CAJ point on the chest; that is, the input end 24 is located at the patient's armpit, and the output end 22 is located on the patient's chest. However, this invention does not limit the specific insertion location of the venous catheter 12 or its extension within the body. In other embodiments, the venous catheter 12 can also be used in other parts of the patient's body 18.

[0037] Preferably, the position monitoring module 14 has a safe activity area S extending outward from the first position sensor 26 at a preset distance. When the first position sensor 26 is within the safe activity area S, the central processing unit 16 determines that the position is normal; when the first position sensor 26 is outside the safe activity area S, the central processing unit 16 determines that the position is abnormal. This setting can avoid the problem of misjudgment by the central processing unit 16 when the first position sensor 26 moves slightly due to normal limb movement by the patient.

[0038] In the illustrated embodiment, the intelligent monitoring system 10 further includes an alarm module 36, which is connected to the central processing unit 16. When the central processing unit 16 determines that the position state of the first position sensor 26 is abnormal, the central processing unit 16 controls the alarm module 36 to issue an alarm through light, sound and / or vibration, such as through indicator lights, alarm sounds or vibrations.

[0039] The inlet end 24 of the tubing is used to connect to an external infusion device. When the inlet end 24 is inside the patient's body 18, the external infusion device can be a catheter with a needle. The external infusion device is connected to the aforementioned storage container, thereby enabling injection into the patient's body through the intravenous catheter 12. When the inlet end 24 is outside the patient's body 18, the external infusion device can be an infusion set with a spiral inlet. Specifically, the intravenous catheter 12 also includes a occluder (not shown in the figure), which is used to close the inlet end 24. When injection into the patient's body 18 is required, the external infusion device is used to open the occluder to connect to the intravenous catheter 12. After the injection is completed, the external infusion device is removed, and the occluder returns to its closed state, continuing to close the inlet end 24. When the inlet end 24 is inside the patient's body 18, the entire venous catheter 12 is embedded inside the patient's body 18, with no catheter exposed from the outside. This avoids confusion and harassment from others, does not affect the patient's daily life such as bathing, reduces the chance of infection, avoids drug leakage, and can be used repeatedly for a long time. When injection is needed, the external infusion device is used to pierce the skin and connect to the venous catheter 12 through the occlusion device. When the inlet end 24 is outside the patient's body 18, only the inlet end 24 of the venous catheter 12 is outside the patient's body 18. When injection is needed, the external infusion device is used to directly connect to the venous catheter 12 through the occlusion device.

[0040] Furthermore, the intelligent monitoring system 10 also includes a base 38, which is fixedly connected to the tube input end 24. When the tube input end 24 is inside the patient's body 18, the sealing element can be fixedly connected to the base 38 to prevent accidental detachment. A connection channel is provided inside the base 38, with one end connected and communicating with the tube input end 24. The sealing element is connected to the other end of the connection channel to block the connection channel, thereby blocking the tube input end 24. At this time, the sealing element is, for example, an elastic material, such as a silicone diaphragm. When injection is required, an external infusion device is used, such as an injection device. The needle pierces the occluder to connect with the intravenous catheter 12 through the connecting channel. After injection, the needle is removed, and the silicone diaphragm automatically returns to a closed state. When the inlet end 24 of the tubing is outside the patient's body 18, the occluder can be fixedly connected to and connected to the inlet end 24. In this case, the occluder is, for example, a connector with a spiral port. When injection is needed, an external infusion device, such as an infusion set with a spiral port, is used. The infusion set is rotated and connected to the connector, so that the two spiral ports are connected to the intravenous catheter 12. After injection, the infusion set is removed, and the connector automatically returns to a closed state. When the inlet end 24 of the tubing is inside the patient's body, the base 38 is embedded under the patient's skin as a venous port (e.g., Figure 3 As shown), when the tube inlet 24 is located outside the patient's body, the base 38 is detachably fixed to the patient's skin (e.g. Figure 2As shown, the catheter 12 can be detachably fixed to the patient's skin, for example, by adhesive, so that the inlet end 24 of the catheter is fixed relative to the patient's body 18. When the intravenous catheter 12 is inserted into the patient's body 18, an incision 40 is created on the patient's body 18, and the inlet end 24 of the catheter and the base 38 are located near the incision 40.

[0041] The intelligent monitoring system 10 also includes a power supply module 44 and a wireless communication module 46. The wireless communication module 46 is signal-connected to the central processing module 16 and can be integrated into the central processing unit 16, using technologies such as Bluetooth, WiFi, or 4G / 5G networks. Both the central processing unit 16 and the power supply module 44 are integrated on the base 38. The power supply module 44 provides power to the intelligent monitoring system 10, while the wireless communication module 46 communicates with external intelligent devices 48, such as mobile phones or computers, to transmit the data and results monitored by the intelligent monitoring system 10 to the intelligent devices 48. This allows medical staff or patients to access an application via mobile phone or computer to view the status of the intravenous catheter 12, real-time monitoring data of the intelligent monitoring system 10, historical records, etc., facilitating remote monitoring and management by medical staff or patients. Furthermore, patients can use the application to learn about the usage and precautions of the intravenous catheter 12, improving their self-management capabilities and providing patient education and guidance functions to help patients better understand disease and treatment knowledge. In this invention, the central processing unit 16 is responsible for receiving, processing and analyzing data from the position monitoring module 14 and the temperature sensor 50. It uses advanced data analysis algorithms to predict risks such as catheter blockage and infection and issue early warnings.

[0042] In some embodiments, when the tube input end 24 is located outside the patient's body 18, the intelligent monitoring system 10 also includes a display module 42. The display module 42 is connected to the central processing unit 16 and is integrated on the base 38. It is used to display the data and results monitored by the intelligent monitoring system 10 so that medical staff or patients can see them.

[0043] During the insertion of the intravenous catheter 12, the skin around the puncture site wound 40 may be at risk of phlebitis, infection, etc. In the illustrated embodiment, the intelligent monitoring system 10 also includes a temperature sensor 50, which is integrated into the intravenous catheter 12 near the wound 40 to sense the temperature of the skin around the wound 40. The temperature sensor 50 is signal-connected to the central processing unit 16 to transmit the sensed temperature data to the central processing unit 16. Since the wound 40 is prone to inflammation and infection, when the temperature sensor 50 senses an increase in temperature, an alarm can be triggered by the warning module 36 to indicate the risk of infection, phlebitis, etc., so that medical staff can handle it in a timely manner.

[0044] In other embodiments, the intelligent monitoring system may also include a pressure detection module, a flow detection module, etc., to provide medical staff with more accurate and timely information support, helping to improve the safety and effectiveness of the treatment process. The pressure detection module includes a pressure sensor, which can be integrated into the intravenous catheter to detect pressure fluctuations caused by factors such as blood flow, drug delivery, or patient activity. It monitors pressure changes within the intravenous catheter in real time and transmits the detected pressure data to the central processing unit. Pressure data is crucial for ensuring the safety and effectiveness of the treatment process. If the pressure is too high or too low, the intelligent monitoring system can automatically issue an alarm through an alert module to remind medical staff to adjust the treatment plan in a timely manner. The flow detection module includes a flow sensor, which can be integrated into the inlet of the catheter. It monitors the flow rate of fluid passing through the intravenous catheter in real time and transmits the monitored flow data to the central processing unit in real time. For example, it can accurately monitor the fluid delivery volume per minute or hour to ensure the accuracy of the treatment dosage. By monitoring the flow data in real time, medical staff can adjust the drug delivery rate or dosage in a timely manner to meet the patient's treatment needs.

[0045] To improve the safety, effectiveness, and patient experience of intravenous catheter use, this invention proposes an intelligent monitoring system based on the Internet of Things and big data technologies. This intelligent monitoring system has the following functions:

[0046] 1. Real-time monitoring and early warning. The system monitors the status of the intravenous catheter and the patient's physiological parameters in real time. If any abnormalities are detected, an early warning is immediately issued to help medical staff identify and address the problem promptly.

[0047] 2. Intelligent Risk Prediction. Utilizing big data analytics and machine learning algorithms, based on historical and real-time data, it predicts risks such as venous catheter blockage and infection, enabling medical staff to take preventative measures in advance.

[0048] 3. Remote monitoring. Healthcare professionals can remotely monitor the status of intravenous catheters via mobile applications, improving catheter retention rates.

[0049] 4. Patient participation and education. Patients can learn about the use and precautions of intravenous catheters through the mobile application, improving their self-management abilities. It also provides patient education and guidance functions to help patients better understand their disease and treatment.

[0050] In summary, this invention provides an intelligent monitoring system based on intravenous catheters. Utilizing the principle of triangulation, three position sensors are installed. The first position sensor is positioned at the output end of the intravenous catheter, while the second and third position sensors are fixed to the patient's skin near the first sensor. This fixes the second and third position sensors relative to the patient's body. When the first position sensor changes position within the patient's body, the central processing unit can promptly detect and report this change, allowing medical personnel to identify and address the issue immediately. This invention achieves real-time monitoring of the position of the intravenous catheter's output end through an intelligent monitoring system. Triangulation significantly improves positioning accuracy, ensuring medical personnel can accurately understand the catheter's position within the patient's body, facilitating timely detection and intervention, and greatly enhancing the safety and effectiveness of intravenous catheter use.

[0051] Other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the embodiments disclosed herein. This invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. It should be understood that the invention is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

Claims

1. An intravenous catheter-based intelligent monitoring system, characterized in that, The intravenous catheter comprises an intravenous catheter, a position monitoring module and a central processor, the position monitoring module is signal connected with the central processor; The intravenous catheter is used for inserting into a patient's body, comprising a tube output end in the patient's body; The position monitoring module comprises a first position sensor, a second position sensor and a third position sensor arranged in a triangle, the first position sensor is fixedly arranged at the tube output end, the second position sensor and the third position sensor are fixedly arranged on the patient's skin near the first position sensor, and the relative positions of the second position sensor and the third position sensor are fixed; The central processor is used for judging the position state of the first position sensor according to the position information sensed by the first position sensor, the second position sensor and the third position sensor respectively; The positions of the first position sensor, the second position sensor and the third position sensor form a triangle, after the intravenous catheter is inserted into the patient's body, the positions of the three position sensors are initial positions; the positions of the second position sensor and the third position sensor are fixed relative to the patient's body, when the position of the first position sensor deviates in the patient's body, the distance between the first position sensor and the second position sensor changes, the angle changes, the distance between the first position sensor and the third position sensor changes, the angle changes, the three position sensors transmit the position information to the central processor, and the central processor compares the position information with the initial position to obtain an abnormal signal result of the position change of the first position sensor; The intravenous catheter is used for the scene that needs to be indwelled in the patient's body for a long time.

2. The intravenous catheter-based intelligent monitoring system of claim 1, wherein, The first position sensor is a microchip, and the first position sensor is integrated in the tube wall inside or outside the tube output end by printing.

3. The intravenous catheter-based intelligent monitoring system of claim 1, wherein, Further comprising a first fixing member and a second fixing member; the second position sensor is fixedly arranged on the first fixing member and detachably fixed to the patient's skin by the first fixing member, so that the second position sensor is fixed relative to the patient's body, and the third position sensor is fixedly arranged on the second fixing member and detachably fixed to the patient's skin by the second fixing member, so that the third position sensor is fixed relative to the patient's body.

4. The intravenous catheter-based intelligent monitoring system of claim 1, wherein, The intravenous catheter further comprises a tube input end and a blocking member for closing the tube input end, the tube input end is used for connecting an external infusion device, and the tube input end is located in or outside the patient's body; when it is needed to inject into the patient's body, the external infusion device is communicated to the intravenous catheter by being communicated with the blocking member, and the external infusion device is removed after injection, and the blocking member returns to the closed state.

5. The intravenous catheter-based intelligent monitoring system of claim 4, wherein, Further comprising a base; the base is fixedly connected to the tube input end, when the tube input end is located in the patient's body, the base is buried under the patient's skin, and when the tube input end is located outside the patient's body, the base is detachably fixed to the patient's skin.

6. The intravenous catheter-based intelligent monitoring system of claim 5, wherein, The venous catheter generates a wound on the patient's body when the venous catheter is inserted into the patient's body, and the input end of the tube body and the base are located near the wound.

7. The intravenous catheter-based intelligent monitoring system of claim 6, wherein, The temperature sensor is integrated on the venous catheter and located near the wound to sense the temperature at the wound, and the temperature sensor is in signal connection with the central processor to transmit the sensed temperature to the central processor.

8. The intravenous catheter-based intelligent monitoring system of claim 5, wherein, The intelligent monitoring system further comprises a power supply module and a wireless communication module, and the central processor, the power supply module and the wireless communication module are all integrated on the base, the power supply module is used to provide power supply for the intelligent monitoring system, the wireless communication module is in signal connection with the central processor, and the wireless communication module is used to communicate data with external intelligent devices. When the input end of the tube body is located outside the patient's body, the intelligent monitoring system further comprises a display module, and the display module is integrated on the base and in signal connection with the central processor.

9. The intravenous catheter-based intelligent monitoring system of claim 1, wherein, When the first position sensor is located within a safe activity area, the central processor determines that the position state of the first position sensor is a normal position state, and when the first position sensor is located outside the safe activity area, the central processor determines that the position state of the first position sensor is an abnormal position state; the safe activity area is a preset distance extending outward from the first position sensor as the center.

10. The intravenous catheter-based intelligent monitoring system of claim 9, wherein, The intelligent monitoring system further comprises a warning module, and when the central processor determines that the position state of the first position sensor is an abnormal position state, the warning module gives a warning in the form of light, sound and / or vibration.

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