Dynamic CVP waveform monitoring system for PICC (Peripherally Inserted Central Catheter)

Abstract

The invention discloses a PICC (Peripherally Inserted Central Catheter) dynamic CVP waveform monitoring system which comprises a pressurizing liquid injection device, a blood pressure sensor, an IBP invasive blood pressure detection module, an IBP cable and a monitor, one end of the blood pressure sensor is connected with the pressurizing liquid injection device, and the other end of the blood pressure sensor is connected with the far end of a PICC; the IBP invasive blood pressure detection module is connected with a signal interface of the blood pressure sensor through the IBP cable and is used for detecting CVP data; the monitor is connected with the IBP invasive blood pressure detection module and used for displaying CVP data monitored by the IBP invasive blood pressure detection module in a CVP oscillogram mode. According to the dynamic CVP waveform monitoring system for PICC catheterization provided by the embodiment of the invention, the tip position of the PICC catheter can be accurately positioned in real time in the PICC catheterization process, an infusion channel can be quickly and timely used, and more treatment time is won for patients. The PICC is used for replacing a CVC catheter, related complications are obviously lower than those of CVC catheterization, clinical treatment can be better guided, and prognosis is improved.

Description

Technical Field

[0001] The invention relates to PICC catheterization, and in particular to a PICC catheterization dynamic CVP waveform monitoring system. Background Art

[0002] Central venous access placement is an invasive procedure in clinical practice, usually to achieve a certain therapeutic effect or is a necessary operation during the medical process. Catheterization usually includes different categories, such as CVC catheterization and PICC catheterization.

[0003] CVC catheterization refers to central venous catheterization, and PICC catheterization refers to central venous catheterization through peripheral venous puncture. The difference between central venous catheterization and central venous catheterization through peripheral venous puncture lies in the different catheterization routes, different usage time, different scope of application, different risks and complications. 1) Catheterization route: Central venous catheterization usually inserts a catheter through the subclavian vein or femoral vein in the neck and places it in a large vein. Central venous catheterization through peripheral venous puncture is usually inserted directly into the superior vena cava through the peripheral vein near the elbow of the patient's upper limb. 2) Usage time: Central venous catheterization is generally left in place for 15 to 30 days. It is usually placed after major surgery when long-term infusion is required and can be removed before discharge. Central venous catheterization through peripheral venous puncture is generally left in place for 7 days to 1 year. It is used by patients undergoing major surgery or chemotherapy. After discharge, they need to go to the hospital for regular maintenance and can continue to use it during the next hospitalization. 3) Scope of application: Central venous catheterization is often used for patients who need to monitor central venous pressure (CVP) and patients who frequently draw blood or need large-volume infusion. Peripheral vein puncture central venous catheterization is often used for patients who need long-term intravenous infusion but do not need high-flow infusion, because the catheter is made of high-grade materials and can remain in the body for a long time. 4) Risks and complications: Since the blood vessels involved in central venous catheterization are large, the physiological structure of the puncture site is complex, and the puncture technique is blind, the operation is more complicated and the risk is relatively high. The incidence of related complications is high, such as massive bleeding, pneumothorax, infection, etc. The main operation of peripheral vein puncture central venous catheterization is to insert the catheter into the arm blood vessel, and the puncture is guided by B-ultrasound. The operation is simple, the success rate is relatively high, and the risk of complications is relatively small.

[0004] However, in the treatment of critically ill patients, drug therapy, hemodynamic monitoring and fluid management are required, the course of the disease and treatment cycle are long, and enhanced CT examinations are required. CVC catheterization is currently used clinically, but, as mentioned above, CVC catheterization has high risks and high incidence of complications. Summary of the invention

[0005] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. To this end, the purpose of the present invention is to provide a PICC catheter dynamic CVP waveform monitoring system.

[0006] To achieve the above object, a PICC catheter dynamic CVP waveform monitoring system according to an embodiment of the present invention includes:

[0007] Pressurized injection device;

[0008] A blood pressure sensor, one end of which is connected to the pressurized injection device, and the other end of which is connected to the distal end of the PICC tube;

[0009] An IBP invasive blood pressure detection module, which is connected to the signal interface of the blood pressure sensor through the IBP cable and is used to detect CVP data;

[0010] A monitor is connected to the IBP invasive blood pressure detection module and is used to display the CVP data monitored by the IBP invasive blood pressure detection module in the form of a CVP waveform graph.

[0011] According to the PICC catheterization dynamic CVP waveform monitoring system provided by the embodiment of the present invention, the CVC tube is replaced by the PICC tube, and CVP waveform monitoring can be realized. Therefore, PICC catheterization is used to replace CVC catheterization in the treatment of critically ill patients. Through CVP monitoring, cardiovascular assessment and hemodynamic monitoring are performed to improve tissue perfusion and oxygen supply to important organs. Intravenous bolus injection, multi-channel drug administration, rapid infusion, enhanced CT (high pressure catheter) and other treatments can also be realized to meet the treatment needs of critically ill patients. Based on the characteristics of PICC catheterization, its related complications are significantly lower than CVC catheterization. Fluid infusion therapy is adjusted under the guidance of continuous CVP monitoring, and the number of heart failure cases, the proportion of lung infection, the time of stay in the intensive care unit, and the mortality rate are all reduced, which better guides clinical treatment and improves prognosis. In addition, the success rate of arm catheterization under B-ultrasound guidance is high, and the tip of the PICC tube can be quickly positioned to the optimal position of the heart cavity.

[0012] In addition, the PICC catheter dynamic CVP waveform monitoring system according to the above embodiment of the present invention may also have the following additional technical features:

[0013] According to one embodiment of the present invention, the pressurized liquid injection device comprises:

[0014] A pressurized bag having a receiving space suitable for accommodating a liquid bag;

[0015] An inflatable balloon, wherein the inflatable balloon is connected to the pressurized bag via an inflatable tube, and is used to pressurize the pressurized bag so that the pressurized bag squeezes the liquid bag;

[0016] An injection tube, one end of which is connected to the liquid bag, and the other end of which is connected to one end of the blood pressure sensor.

[0017] According to one embodiment of the present invention, a pressure gauge is connected to the pressurized bag to display the inflation pressure of the pressurized bag.

[0018] According to one embodiment of the present invention, the monitor has a data analysis and processing module and an abnormal alarm module. The data analysis and processing module is used to analyze the characteristic parameters of the CVP waveform in real time. When the CVP waveform is abnormal, the abnormal alarm module is controlled to send an audible and visual alarm signal. The characteristic parameters include waveform amplitude, waveform period and waveform baseline.

[0019] According to one embodiment of the present invention, the monitor further comprises a wireless transmission module, and the wireless transmission module is used to transmit the monitoring data corresponding to the CVP waveform to the central monitoring system of the hospital in real time, so as to realize remote monitoring and data sharing.

[0020] According to one embodiment of the present invention, the monitoring system further comprises a mobile terminal, which is in wireless communication with the monitor and is used to receive monitoring data and alarm information sent by the monitor and provide for remote viewing by medical personnel.

[0021] According to an embodiment of the present invention, the blood pressure sensor is a disposable sterile sensor having an anti-backflow valve for preventing blood backflow.

[0022] According to one embodiment of the present invention, a roller clamp is provided on the liquid injection tube to control the opening of the liquid injection tube.

[0023] According to an embodiment of the present invention, the IBP invasive blood pressure detection module is provided with a display unit, and the display unit is used to display the CVP data.

[0024] According to one embodiment of the present invention, the PICC tube is a valveless PICC tube.

[0025] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0027] Figure 1 It is a structural schematic diagram of a dynamic CVP waveform monitoring system for PICC catheterization according to an embodiment of the present invention;

[0028] Figure 2 It is a schematic diagram of the monitor display data in the PICC catheter dynamic CVP waveform monitoring system according to an embodiment of the present invention;

[0029] Figure 3 This is a practical application diagram of the monitor display data in the PICC catheterization dynamic CVP waveform monitoring system according to an embodiment of the present invention.

[0030] Reference numerals:

[0031] 10. Pressurized liquid injection device;

[0032] 101. Pressurized bag;

[0033] 102. Inflate the balloon;

[0034] 103. Liquid injection tube;

[0035] 104. Liquid bag;

[0036] 105, roller clamp;

[0037] 106. Pressure gauge;

[0038] 20. Blood pressure sensor;

[0039] 30. IBP invasive blood pressure detection module;

[0040] 40. Monitor;

[0041] 50. PICC tube.

[0042] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0043] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but are not to be construed as limiting the present invention. All other embodiments obtained by ordinary technicians in the field without creative work based on the embodiments of the present invention are within the scope of protection of the present invention.

[0044] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “circumferential”, “radial”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0045] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0046] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0048] The PICC catheterization dynamic CVP waveform monitoring system according to an embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

[0049] Reference Figures 1 to 3 As shown, the PICC catheter dynamic CVP waveform monitoring system provided according to an embodiment of the present invention includes a pressurized injection device 10, a blood pressure sensor 20, an IBP invasive blood pressure detection module 30 and a monitor 40.

[0050] Specifically, the pressurized injection device 10 is used to inject liquid medicine into the PICC tube 50. In the present embodiment, the liquid medicine is preferably physiological saline. Of course, in other embodiments, other suitable liquids may be selected according to clinical needs.

[0051] One end of the blood pressure sensor 20 is connected to the pressurized injection device 10, and the other end of the blood pressure sensor 20 is connected to the distal end of the PICC tube 50. That is, the blood pressure sensor 20 has a first end and a second end, wherein the first end is connected to the pressurized injection device 10, and the second end is connected to the distal end of the PICC tube 50. The PICC tube 50 has a proximal end and a distal end, the proximal end is an end inserted into the human body, and the distal end is an end retained outside the body. The blood pressure sensor 20 is also provided with a signal interface for electrically connecting to the IBP cable.

[0052] The IBP invasive blood pressure detection module 30 is connected to the signal interface of the blood pressure sensor 20 through the IBP (invasive arterial blood pressure) cable to detect CVP data. CVP data specifically includes but is not limited to parameters such as right ventricular filling pressure, venous inner wall pressure, venous outer wall pressure, and venous capillary pressure. Its working principle is to utilize the pressure transmission characteristics of the fluid to transmit the pressure in the blood vessel to the blood pressure sensor 20 through the liquid in the PICC tube 50, thereby realizing the detection of real-time pressure changes in the blood vessel. The IBP invasive blood pressure detection module 30 can adopt various IBP detection modules in the prior art, as long as it can realize invasive blood pressure detection.

[0053] The monitor 40 is connected to the IBP invasive blood pressure detection module 30 and is used to display the CVP data monitored by the IBP invasive blood pressure detection module 30 in the form of a CVP waveform. It is understandable that the monitor 40 can also display electrocardiogram monitoring data (ie, ECG data).

[0054] During operation, the blood pressure sensor 20 is first connected to the pressurized injection device 10, and then the air in the blood pressure sensor 20 is emptied by the pressurized injection device 10. After the air in the blood pressure sensor 20 is emptied, the distal end of the PICC tube 50 is connected to the blood pressure sensor 20. In addition, the IBP blood detection module is combined with the monitor 40, and the signal interface of the blood pressure sensor 20 is connected to the IBP blood detection module. Before the tip (proximal end) of the PICC tube 50 enters the superior vena cava, the CVP waveform is a straight line, and when the tip (proximal end) of the PICC tube 50 is inserted into the superior vena cava, the waveform can be displayed. Depending on the insertion depth of the tip of the PICC tube 50, the waveform amplitude and data on the CVP waveform are also different.

[0055] According to the PICC catheterization dynamic CVP waveform monitoring system provided by the embodiment of the present invention, the PICC tube 50 replaces the CVC tube, and CVP waveform monitoring can be realized. Therefore, in the process of PICC catheterization, the position of the PICC catheter tip can be accurately located in real time, and the infusion route can be used quickly and timely to gain more treatment time for the patient. PICC catheterization is used to replace CVC catheterization in the treatment of critically ill patients. Through CVP monitoring, cardiovascular assessment and hemodynamic monitoring are performed to improve tissue perfusion and oxygen supply to important organs. Intravenous bolus injection, multi-channel drug administration, rapid infusion, enhanced CT (high-pressure catheter) and other treatments can also be achieved to meet the treatment needs of critically ill patients. Based on the characteristics of PICC catheterization, its related complications are significantly lower than CVC catheterization. Under the guidance of continuous CVP monitoring, the fluid infusion treatment is adjusted, and the number of heart failure cases, the proportion of lung infection, the time of admission to the intensive care unit, and the mortality rate are all reduced, which better guides clinical treatment and improves prognosis. In addition, under the guidance of B-ultrasound, the catheter is placed in the arm with a high success rate, and the tip of the PICC tube 50 can be quickly positioned to the optimal position of the heart cavity.

[0056] In some embodiments of the present invention, the pressurized liquid injection device 10 includes a pressurized bag 101, an inflatable balloon 102, and a liquid injection tube 103. The pressurized bag 101 has a receiving space suitable for accommodating a liquid bag 104. The liquid bag 104 is generally physiological saline, etc., and other liquids can also be selected according to clinical needs. The pressurized bag 101 can be made of medical-grade PVC material.

[0057] The inflatable balloon 102 is connected to the pressurized bag 101 through an inflating tube to pressurize the pressurized bag 101 so that the pressurized bag 101 squeezes the liquid bag 104. By squeezing the inflatable balloon 102, air can be inflated into the pressurized bag 101, so that the pressurized bag 101 squeezes the liquid bag 104 inside it.

[0058] One end of the injection tube 103 is connected to the liquid bag 104, and the other end of the injection tube 103 is connected to one end of the blood pressure sensor 20. When the liquid bag 104 is squeezed, the liquid inside it can enter the blood sensor through the injection tube 103 and then flow into the PICC tube 50.

[0059] In actual application, the liquid bag 104 is first placed in the receiving space of the pressurized bag 101, and the injection tube 103 is connected to the liquid bag 104. Then, the pressurized bag 101 is inflated through the inflatable balloon 102 to ensure that the pressurized bag 101 reaches a suitable pressure value. The pressurized bag 101 squeezes the liquid bag 104, so that the liquid is transported to the blood pressure sensor 20 through the injection tube 103 under pressure.

[0060] The pressurized liquid injection device 10 can not only achieve stable and reliable liquid infusion, but also is easy to operate and highly safe, thus fully meeting clinical needs.

[0061] Preferably, the pressurized bag 101 is connected with a pressure gauge 106 to display the inflation pressure of the pressurized bag 101. When the pressurized bag 101 is inflated through the inflatable balloon 102, the pressure value can be displayed by the pressure gauge 106 to ensure that the pressure can reach a preset pressure value, such as 300 mmHg, so that the injection is ensured at a suitable pressure, ensuring its safety and reliability.

[0062] In some embodiments of the present invention, the monitor 40 has a data analysis and processing module and an abnormal alarm module. The data analysis and processing module is used to analyze the characteristic parameters of the CVP waveform in real time. When the CVP waveform is abnormal, the abnormal alarm module is controlled to send an audible and visual alarm signal. The characteristic parameters include waveform amplitude, waveform period and waveform baseline.

[0063] Specifically, the data analysis and processing module may include a signal receiving unit, a waveform analysis unit, a parameter calculation unit, a data comparison unit and an alarm triggering unit. The signal receiving unit is electrically connected to the IBP invasive blood pressure detection module 30, and is used to receive the digitized CVP waveform signal; the waveform analysis unit is electrically connected to the signal receiving unit, and is used to extract the characteristics of the received CVP waveform signal; the parameter calculation unit is electrically connected to the waveform analysis unit, and is used to calculate the specific value of the characteristic parameter; the data comparison unit is electrically connected to the parameter calculation unit, and is used to compare the calculated characteristic parameter value with the preset normal value range; the alarm triggering unit is electrically connected to the data comparison unit, and is used to generate an alarm triggering signal when a parameter abnormality is detected.

[0064] The abnormal alarm module may include a sound alarm unit and / or a visual alarm unit. The sound alarm unit includes a speaker and an audio processing circuit, and the speaker is electrically connected to the alarm control unit through the audio processing circuit; the visual alarm unit includes an LED indicator and / or a display screen alarm area, and both the sound alarm unit and the visual alarm unit are electrically connected to the alarm trigger unit; when the alarm trigger unit generates an alarm trigger signal, the sound alarm unit emits an alarm prompt sound, the LED indicator emits a prompt light, and the display screen alarm area displays a text reminder.

[0065] This embodiment realizes the real-time monitoring and abnormal alarm functions of CVP waveform by setting up a data analysis and processing module and an abnormal alarm module. Among them, the data analysis and processing module can accurately analyze the waveform characteristic parameters and determine whether the parameters are abnormal; the abnormal alarm module uses sound and light alarms to give alarm prompts, which is convenient for medical staff to discover and deal with abnormal situations in time. This solution has strong anti-interference ability, supports data storage and retrospective analysis, and improves the quality and safety of monitoring of critically ill patients.

[0066] In one embodiment of the present invention, the monitor 40 also has a wireless transmission module, which is used to transmit the monitoring data corresponding to the CVP waveform to the central monitoring system of the hospital in real time to achieve remote monitoring and data sharing. The wireless transmission module includes but is not limited to Wi-Fi, Bluetooth, and a dedicated medical Internet of Things protocol. The central monitoring system can be, but is not limited to, various mainstream hospital information systems (HIS), clinical information systems (CIS), and electronic medical record systems (EMR), etc., to achieve data interconnection and comprehensive utilization.

[0067] In the central monitoring system, a dedicated data receiving and processing server can be set up. After receiving the data, the server first decrypts and verifies the data integrity, and then stores the data in the hospital's clinical database. Medical staff can view the patient's CVP waveform and monitoring parameters in real time through the hospital intranet or dedicated mobile terminals, and can also query historical data for analysis and comparative research.

[0068] In this embodiment, real-time sharing of patient monitoring data is achieved, the work efficiency of medical staff is improved, remote consultation and disease analysis are supported, and experts are convenient to provide diagnosis and treatment opinions in a timely manner; through centralized storage and analysis of data, strong support is provided for clinical research and medical quality improvement, and the clinical application effect of the PICC catheter dynamic CVP waveform monitoring system is significantly improved.

[0069] In some embodiments of the present invention, the monitoring system further comprises a mobile terminal, which is in wireless communication with the monitor 40 and is used to receive monitoring data and alarm information sent by the monitor 40 and provide remote viewing for medical personnel.

[0070] The mobile terminal can be a medical tablet computer, a medical smart phone or other portable medical terminal device. When the monitor 40 detects an abnormal situation, the mobile terminal will immediately receive the alarm information and remind the medical staff through various means such as sound, vibration and screen prompts. In addition, the medical staff can view the patient's historical monitoring data through the mobile terminal, and can also build in data analysis tools to achieve data analysis and management.

[0071] In this embodiment, the configuration of the mobile terminal greatly improves the work efficiency of medical staff, enabling them to grasp the patient's condition anytime and anywhere and quickly respond to clinical needs. The clinical practicality of the PICC catheter dynamic CVP waveform monitoring system is further enhanced, providing support for the refined management of critically ill patients.

[0072] In one embodiment of the present invention, the blood pressure sensor 20 is a disposable sterile sensor, and the blood pressure sensor 20 has an anti-backflow valve for preventing blood from flowing back. In this embodiment, the blood pressure sensor 20 adopts a disposable sterile design and is equipped with an anti-backflow valve to ensure the safety and reliability of the measurement process.

[0073] Preferably, a roller clamp 105 is provided on the injection tube 103 to control the opening of the injection tube 103. The roller clamp 105 can realize continuous adjustment of the opening of the injection tube 103, which is convenient for adjusting and controlling the injection process.

[0074] Preferably, the IBP invasive blood pressure detection module 30 is provided with a display unit, and the display unit is used to display the CVP data. In this way, the IBP invasive blood pressure detection module 30 can be used independently without the monitor 40, and the detection data can be displayed by the display unit on the IBP invasive blood pressure detection module 30 to provide a basis for judgment for medical staff, so that clinical application is more flexible and convenient.

[0075] It is understandable that the PICC tube 50 is preferably a valveless PICC tube 50. The special structural design of the valved PICC catheter and the closed state of the catheter affect the measurement accuracy of CVP. However, the valveless PICC tube 50 can achieve accurate monitoring of CVP.

[0076] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0077] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A PICC catheter dynamic CVP waveform monitoring system, characterized in that: include: Pressurized injection device; A blood pressure sensor, one end of which is connected to the pressurized injection device, and the other end of which is connected to the distal end of the PICC tube; An IBP invasive blood pressure detection module, which is connected to the signal interface of the blood pressure sensor through the IBP cable and is used to detect CVP data; A monitor is connected to the IBP invasive blood pressure detection module and is used to display the CVP data monitored by the IBP invasive blood pressure detection module in the form of a CVP waveform graph.

2. The PICC catheter dynamic CVP waveform monitoring system according to claim 1, characterized in that: The pressurized liquid injection device comprises: A pressurized bag having a receiving space suitable for accommodating a liquid bag; An inflatable balloon, wherein the inflatable balloon is connected to the pressurized bag via an inflatable tube, and is used to pressurize the pressurized bag so that the pressurized bag squeezes the liquid bag; An injection tube, one end of which is connected to the liquid bag, and the other end of which is connected to one end of the blood pressure sensor.

3. The PICC catheter dynamic CVP waveform monitoring system according to claim 2, characterized in that: The pressurized bag is connected with a pressure gauge to display the inflation pressure of the pressurized bag.

4. The PICC catheter dynamic CVP waveform monitoring system according to claim 1, characterized in that: The monitor comprises a data analysis and processing module and an abnormal alarm module. The data analysis and processing module is used to analyze the characteristic parameters of the CVP waveform in real time. When an abnormality occurs in the CVP waveform, the abnormal alarm module is controlled to emit an audible and visual alarm signal. The characteristic parameters include waveform amplitude, waveform period and waveform baseline.

5. The PICC catheter dynamic CVP waveform monitoring system according to claim 4, characterized in that: The monitor also has a wireless transmission module, which is used to transmit the monitoring data corresponding to the CVP waveform to the central monitoring system of the hospital in real time to achieve remote monitoring and data sharing.

6. The PICC catheterization dynamic CVP waveform monitoring system according to claim 4, characterized in that: The monitoring system also includes a mobile terminal, which is in wireless communication with the monitor and is used to receive monitoring data and alarm information sent by the monitor and provide remote viewing for medical staff.

7. The PICC catheterization dynamic CVP waveform monitoring system according to claim 1, characterized in that: The blood pressure sensor is a disposable sterile sensor and has an anti-backflow valve for preventing blood from flowing back.

8. The PICC catheterization dynamic CVP waveform monitoring system according to claim 2, characterized in that: The liquid injection tube is provided with a roller clamp for controlling the opening of the liquid injection tube.

9. The PICC catheterization dynamic CVP waveform monitoring system according to claim 1, characterized in that: The IBP invasive blood pressure detection module is provided with a display unit, and the display unit is used to display the CVP data.

10. The PICC catheterization dynamic CVP waveform monitoring system according to claim 1, characterized in that: The PICC tube is a valveless PICC tube.

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