Full-automatic pressure measuring method, kit, monitor and storage device

Abstract

The invention relates to the field of medical pressure monitoring, and discloses a full-automatic pressure measuring method, a suite, a monitor and a storage device, the suite is additionally provided with a second pressure sensing unit or a gear set capable of automatically replacing a pressure measuring pipeline on the basis of a first pressure sensing unit, and the suite further comprises a first pressure guide pipe used for measuring the pressure of a target cavity; the second pressure guide pipe is used for measuring the height difference between the target chamber and the pressure sensing unit, the tail end of the second pressure guide pipe is a zero-pressure end, during measurement, the zero-pressure end and the target chamber are located on the same horizontal plane all the time, and the actual pressure value of the target chamber is obtained by subtracting the blood static pressure value obtained by the height difference from the pressure value measured by the first pressure sensing unit. In the pressure measuring process, no matter how the body position of a patient, the height of a sickbed and the position of the pressure measuring suite change, the height difference between the pressure measuring suite and the target pressure measuring cavity can be automatically converted into a pressure value, the pressure value is corrected into a final measuring value, and clinical pressure measuring is more accurate and convenient.

Description

Technical Field

[0001] The present invention relates to the field of medical pressure monitoring, and particularly to a fully automatic pressure measurement method, a kit, a monitor and a storage device. Background Art

[0002] Pressure monitoring is the basic monitoring in medical monitoring, such as arterial pressure monitoring, central venous pressure monitoring, intracranial pressure monitoring, etc., including indirect pressure measurement method and direct pressure measurement method. The direct pressure measurement method is a method of communicating a pressure sensor with a target pressure measurement chamber through a pipeline with a pressure guiding liquid to conduct the pressure in the target chamber to the pressure sensor. The pressure measurement principle of the direct pressure measurement method is to measure the pressure difference relative to the pressure sensor in the target chamber. Therefore, "zero calibration" must be performed before pressure measurement. There are two conditions for zero calibration: 1) The position of the sensor is on the same horizontal plane as the target zero point; 2) The atmospheric pressure at the horizontal plane of the target zero point is regarded as a plane with zero pressure. For example, during the process of radial artery catheterization for pressure measurement, the target pressure measurement chamber is the aorta. The sensor is communicated with the aorta through a sensor pipeline, the radial artery, the axillary artery, etc. The target zero point needs to be on the same plane as the heart or the aorta. At this time, the pressure measured by the sensor can be regarded as the arterial pressure at the heart level.

[0003] In clinical practice, especially during surgery, the patient's body position and the height of the operating table may change at any time, and the position of the pressure sensor often shifts due to poor fixation or accident. The above factors will all lead to inaccurate direct pressure measurement. For every change of Δh in the height difference between the pressure sensor and the target pressure measurement chamber, the resulting pressure change is ρgΔh. That is, for every change of 10 cm, the deviation of pressure measurement reaches 7.35 mmHg. Such a large change range has a greater impact on the measurement of central venous pressure and intracranial pressure. Due to the frequent change of body position and the adjustment of bed height during surgery, and the large coverage of surgical drapes, it is difficult and cumbersome for medical staff to adjust the position of the sensor in real time according to factors such as body position. If the large increase in blood pressure value caused by the sensor falling to the ground is not recognized in time, it may mislead the doctor to overestimate the blood pressure value, and then use unnecessary antihypertensive drugs, resulting in severe hypotension and even organ perfusion damage. When directly measuring arterial pressure, in order to keep the pressure sensor as close to the heart level as possible, the sensor is often directly fixed to the chest wall at the midaxillary line of the patient or the outer side of the upper arm. Prolonged placement can cause pressure or abrasion to the patient's skin by the hard plastic of the pressure sensor.

[0004] To facilitate the dynamic adjustment of the pressure sensor to be on the same horizontal plane as the target measurement position, a position calibrator for an invasive arterial blood pressure monitoring pressure sensor, disclosed in the Chinese utility model patent with the publication number CN212816232U, is provided with a horizontal laser emitter on the sensor, which shoots at the right atrium position of the target position, and then adjusts the height of the sensor according to the deviation between the laser and the target position. However, in actual clinical work, the patient's whole body is covered by surgical drapes, and the laser cannot irradiate the target area.

[0005] Therefore, there is a need for a fully automatic pressure sensor that can still measure accurate blood pressure values regardless of the patient's body position, the height at which the sensor is placed, and how the body position and the sensor height change, so as to improve the monitoring accuracy, enhance the safety, and make the work of medical staff more convenient. Summary of the Invention

[0006] The object of the present invention is to provide a fully automatic pressure measurement method, kit, monitor, and storage device to achieve accurate pressure measurement still when any changes occur in the patient's body position, the height of the operating table, and the position of the sensor.

[0007] To solve the above technical problems, the present invention provides the following technical solutions:

[0008] A fully automatic pressure measurement kit is used to monitor the pressure in a target chamber, such as arterial pressure measurement, central venous pressure measurement, intracranial pressure measurement, etc., including a wire, a first pressure sensing unit, and a total pressure pipe. One end of the wire is connected to a monitor. The monitor supplies power to the pressure measurement kit through the wire and extracts data. The first pressure sensing unit is a pressure measurement unit. The pressure measurement unit can convert the pressure signal in its working chamber into an electrical signal and transmit it back to the monitor for analysis and processing. The total pressure pipe is branched into a first pressure pipe and a second pressure pipe. The pressure pipe is used to transmit pressure, and its lumen is filled with an incompressible low-viscosity fluid, usually physiological saline; the total pressure pipe, A two-way valve or a three-way valve is arranged at the joint of the first pressure conducting pipe and the second pressure conducting pipe. The function of the two-way valve is to make the main pressure conducting pipe always connected only with the first pressure conducting pipe or the second pressure conducting pipe, so that the pressure in the first pressure conducting pipe or the second pressure conducting pipe is transmitted to the pressure measuring unit separately; the first pressure conducting pipe is connected with the target pressure measuring cavity, and the target pressure measuring cavity refers to the cavity where the pressure needs to be measured and evaluated. For example, when measuring arterial pressure, the traditional concept believes that the target pressure measuring cavity is the aorta, and when measuring central venous pressure, the target pressure measuring cavity is the right atrium. When measuring intracranial pressure, the target pressure measuring cavity is the subarachnoid space of the brain. When in the supine position, the corresponding target zero points are arterial pressure-midaxillary line and the intersection of the fourth intercostal space. point, central venous pressure - the intersection of the mid-axillary line and the fourth intercostal space, intracranial pressure - the external auditory canal, the target zero point refers to the horizontal plane corresponding to the target pressure measuring cavity. For traditional direct pressure measurement, the sensor must be placed on the horizontal plane of the target zero point; the end of the second pressure conducting tube is the zero-pressure end, and the end refers to the farthest end of the second pressure conducting tube away from the pressure sensing unit. The second pressure conducting tube is filled with liquid and the zero-pressure end is connected to the atmosphere. When measuring pressure, the zero-pressure end is placed at the target zero point, and the liquid level in the zero-pressure end is at the same horizontal plane as the target zero point. Specifically, the zero-pressure end is horizontally pasted and fixed to the patient's heart or external auditory canal. When the target zero point moves, the zero-pressure end moves accordingly. The two-way valve is movable, and the relative position of the zero-pressure end and the target zero point is always fixed. The zero-pressure end is the reference point where the pressure of the pressure measuring kit is zero during the measurement process. The rotation of the two-way valve can be driven by a gear set, and the gear set includes a driven gear and a driving gear. The shaft of the driven gear is connected to the two-way valve, and the shaft of the driving gear is connected to the driving motor. The two-way valve can also be rotated manually. The driving motor is powered by the monitor and controlled by the built-in program of the monitor. The angle and direction of each gear rotation are determined according to the shape and direction of the bifurcation of the pressure pipe and the direction of the opening of the two-way valve, so as to make the total pressure pipe communicate with only one of the first pressure pipe and the second pressure pipe.

[0009] The fully automatic pressure measurement kit composed of the first pressure sensing unit and the gear set is used in conjunction with a monitor that can drive and control the fully automatic pressure measurement kit, so as to realize full automation of pressure monitoring. The implementation method is as follows:

[0010] Step 1: Zero the first pressure sensing unit, that is, connect the main pressure guiding tube to the atmosphere, and regard the atmospheric pressure at this time as a pressure of zero;

[0011] Step 2: Place the zero-pressure end of the second pressure guiding tube at the target zero point position, such as pasting it at the intersection of the midaxillary line of the patient and the fourth intercostal space, the external auditory canal, or a stable object corresponding thereto, such as a headrest. The first pressure sensing unit is placed at any temporarily fixed position, where the temporary fixation means before completing Steps 1-5;

[0012] Step 3: The monitor drives the gear to rotate through program control, so that the main pressure guiding tube is connected to the second pressure guiding tube, and the pressure in the second pressure guiding tube is obtained. This pressure value is a fixed value, that is, the pressure difference between the target zero point and the first pressure sensing unit at the current position, denoted as △p'. Through the density ρ of the liquid in the second pressure guiding tube 液 Calculate the height difference △h between the target zero point and the first pressure sensing unit at the current position as △h = △p' / (ρ liquid·g), where g is the acceleration due to gravity;

[0013] Step 4: Calculate the hydrostatic pressure difference △p between the target zero point and the first pressure sensing unit at the current position through the height difference △h and the density ρ of the blood 血 △p = ρ 血 g·△h. When the position of the first pressure sensing unit is higher than the target zero point position, △p is negative;

[0014] Step 5: The driving motor drives the gear to rotate, so that the main pressure guiding tube is connected to the first pressure guiding tube, and a pressure value p is measured. If it is arterial pressure measurement, a set of blood pressure values Sp / Dp can be obtained, where Sp is the systolic blood pressure and Dp is the diastolic blood pressure. Then the pressure of the target pressure measurement chamber can be calculated as p - △p, or for arterial pressure measurement it is Sp - △p / Dp - △p. If pressure waveform analysis is required, each set of blood pressure values in the arterial pressure waveform is subtracted by △p before analysis;

[0015] Step 6: Thereafter, the monitor automatically analyzes whether the relative position between the first pressure sensing unit and the target zero point has changed through the change of the pressure value or the pressure waveform. When it is judged that there may be a change, the above Steps 1-5 are repeated; when no change in the relative position is detected, the system automatically repeats the above Steps 1-5 every other period of time t.

[0016] The method for judging whether the relative position of the first pressure sensing unit and the target zero point has changed is as follows: Compare the pressure measurement value of each cycle with the pressure measurement value of the previous cycle. When the pressure change value exceeds the specified percentage, it can be judged that the relative position of the first pressure sensing unit and the target zero point may have changed, and the above steps 1 to 5 can be started. When the monitored pressure is arterial pressure or central venous pressure, the cycle can be set as the cardiac systolic cycle. When there is no significant cycle in the monitored target chamber pressure, it can be set as the average pressure within a specific time period, such as 30 seconds. The percentage of the pressure change can be set according to the target pressure range. For example, the arterial pressure can be set to 10%, and the central venous pressure can be set to 30%. The monitor can also analyze whether the patient has atrial premature beats, atrial fibrillation, ventricular premature beats, ventricular fibrillation, etc. through the pulse waveform and electrocardiogram waveform. When there are significant changes in the above cardiac activities, the judgment of whether the relative position has changed can be set as the average pressure within a specific time period, or the medical staff can be prompted to switch to the manual mode. In the manual mode, the pressure measurement mode can be set as the traditional pressure measurement mode, which requires more attention from the medical staff.

[0017] Further, a piston is arranged inside the zero pressure end. The zero pressure end is communicated with the atmosphere at the distal end of the piston. The piston refers to a component that can freely move along the long axis within a specified range inside the pipeline. The friction between the piston and the inner wall of the pipeline is small and can be ignored. The function of the piston is to prevent the liquid in the second pressure guiding pipe from flowing out of the zero pressure end and causing air to enter the second pressure guiding pipe, which affects the detection accuracy when the zero pressure end is in a lower position and the proximal end of the second pressure guiding pipe is disconnected.

[0018] Further, the wires for supplying power and programming the drive motor are integrated with the wires of the pressure sensing unit. The interfaces of the power supply wires of the drive motor are integrated with the interfaces of the pressure sensing unit, which is convenient for operation and maintenance, and the internal wires are insulated from each other.

[0019] Further, the connections of the main pressure guiding pipe, the first pressure guiding pipe, and the second pressure guiding pipe and the drive motor are fixed on the same base, making the mutual relationship of the gear set more fixed. The gear set is provided with a gear set housing to prevent the gears from being exposed. The first pressure guiding pipe and the second pressure guiding pipe are provided with interfaces outside the gear set housing, and the gear set housing can be opened for manual operation.

[0020] Further, the longitudinal section of the zero-pressure end of the second pressure guiding tube is trapezoidal conical. The trapezoidal cone refers to the part of the cone that does not include the tip, and its longitudinal section is an isosceles trapezoid. The piston is trapezoidal conical and adapted to the inner wall of the zero-pressure end. The outer diameter of the bottom surface of the piston is smaller than the inner diameter of the bottom surface of the trapezoidal cone at the zero-pressure end, and the outer diameter of the top surface of the piston is larger than the inner diameter of the top surface of the trapezoidal cone at the zero-pressure end. The bottom surface of the trapezoidal cone refers to the circular surface with a larger diameter, and the top surface of the trapezoidal cone refers to the circular surface with a smaller diameter. The trapezoidal conical piston is beneficial to reducing the friction between the piston and the inner wall of the pressure guiding tube when there is no tendency for the liquid to overflow at the zero-pressure end, and at the same time, it can effectively block the liquid when there is a tendency for the liquid to overflow accidentally at the zero-pressure end.

[0021] Further, an air vent housing is provided outside the zero-pressure end, and an external air vent is provided on the air vent housing. The liquid inside the zero-pressure end communicates with the atmosphere through the external air vent.

[0022] Further, an air vent outer sleeve is provided outside the air vent housing. The air vent outer sleeve allows air to flow freely, so as to prevent dust and pollution.

[0023] Further, an inner conical opening adapted to the conical head of a standard syringe is provided at the end of the zero-pressure end. An inner air vent is provided on the side wall of the proximal end of the inner conical opening. After the conical head of the syringe is inserted, the outer side wall of the conical head can block the inner air vent. The inner conical opening is used to fill the second pressure guiding tube with liquid for exhaust; an inner conical cap is also provided at the zero-pressure end, and the inner conical cap can block the inner conical opening but cannot block the inner air vent.

[0024] Further, a side port is provided at the proximal end of the zero-pressure end of the second pressure guiding tube. The side port can insert the conical head or the needle of a syringe, so as to perform operations such as exhaust.

[0025] Further, the connection between the second pressure guiding tube and the two-way valve is detachable. The fully automatic pressure measurement kit is equipped with the second pressure guiding tube in a separate package. When the second pressure guiding tube is suspected of being contaminated, the second pressure guiding tube can be removed and discarded, and a new pressure guiding tube can be replaced, or the second pressure guiding tube can be replaced regularly.

[0026] Further, an indication mark corresponding to the direction of the built-in two-way valve is provided on the top surface of the driven gear, which is convenient for operation and observation when manual operation is required.

[0027] Further, a pasting part is provided at the zero-pressure end, which is used to fix the zero-pressure end at the target zero point.

[0028] The present invention also provides another fully automatic pressure measurement kit, which includes a first pressure sensing unit and a second pressure sensing unit. The first pressure sensing unit is connected to a first pressure guiding tube, and the first pressure guiding tube communicates with a target pressure measurement chamber. The second pressure sensing unit is connected to a second pressure guiding tube, and the end of the second pressure guiding tube is a zero-pressure end. The second pressure guiding tube is filled with liquid and the zero-pressure end communicates with the atmosphere. During pressure measurement, the first pressure sensing unit and the second pressure sensing unit are always at the same horizontal plane, and the zero-pressure end is placed at the target zero point. The second pressure sensing unit monitors in real time the pressure difference Δp between the second pressure sensing unit and the target zero point, and is used to correct in real time the pressure value measured by the first pressure sensing unit. There is no need to set up a gear set, avoiding the calibration delay caused by the pressure measurement kit with a gear set, and simplifying the pressure calibration procedure.

[0029] The fully automatic pressure measurement kit composed of the first pressure sensing unit and the second pressure sensing unit is used in cooperation with a monitor that can drive and control the fully automatic pressure measurement kit, and can realize the full automation of pressure monitoring. The implementation method is as follows:

[0030] Step a: The first pressure sensing unit and the second pressure sensing unit are always at the same horizontal plane. The first pressure sensing unit and the second pressure sensing unit are zero-calibrated. The first pressure sensing unit is connected and communicated with the first pressure guiding tube, and the second pressure sensing unit is connected and communicated with the second pressure guiding tube.

[0031] Step b: The zero-pressure end and the target zero point are fixed through a pasting part, such as the position of the fourth intercostal space in the midaxillary line, the level of the external auditory canal, etc.

[0032] Step c: Obtain the pressure in the second pressure guiding tube. This pressure value is a fixed value, which represents the pressure difference between the target zero point and the second pressure sensing unit, denoted as Δp'. Through the density ρ of the liquid in the second pressure guiding tube 液 calculate the height difference Δh between the target zero point and the second pressure sensing unit as Δh = Δp' / (ρ 液 ·g), where g is the acceleration due to gravity;

[0033] Step d: Calculate the blood hydrostatic pressure difference Δp between the target zero point and the second pressure sensing unit through the height difference Δh and the density ρ of the blood 血 as Δp = ρ 血 g·Δh. When the position of the second pressure sensing unit is higher than the position of the target zero point, Δp is negative;

[0034] Step e: The first pressure sensing unit measures a pressure value p. If it is arterial pressure measurement, a set of blood pressure values Sp / Dp can be obtained, and then the pressure of the target pressure measurement chamber can be calculated as p + Δp. For arterial pressure measurement, it is Sp - Δp / Dp - Δp. If it is necessary to analyze the arterial pressure waveform, each set of blood pressure values in the arterial pressure waveform is subtracted by Δp and then analyzed;

[0035] Step f: When the relative position between the second pressure sensing unit and the target zero point changes, the second pressure sensing unit can immediately detect the change, obtain a new Δp, and then bring the new Δp into the first pressure sensing unit in real time according to the method in step e to calibrate the pressure measurement value of the first pressure sensing unit in real time.

[0036] The present invention also provides a technical solution for a monitor, and the monitor is provided with an interface or a program, and the interface or the program can drive or program control the above-mentioned pressure measurement kit composed of a combination of a first pressure sensing unit and a gear set or the pressure measurement kit composed of a combination of a first pressure sensing unit and a second pressure sensing unit.

[0037] The present invention also provides a storage device, and the storage device is configured with a program that can execute one of the above two full-automatic pressure monitoring methods.

[0038] Advantages of the present invention: By providing a pressure measurement kit composed of a combination of a first pressure sensing unit and a gear set or a combination of a first pressure sensing unit and a second pressure sensing unit, full automation of pressure monitoring is achieved through a program built in the monitor. The second pressure guiding tube in the kit is filled with liquid, and the zero-pressure end is fixed to the target zero point. The height difference between the pressure sensing unit and the target zero point can be measured through the second pressure guiding tube, and then the pressure difference caused by the height difference is corrected to the pressure sensing unit communicated with the first pressure guiding tube, and an accurate pressure value can be obtained. When the relative position between the pressure sensing unit and the target zero point changes, the program automatically starts measurement and corrects the new pressure difference data to the final pressure value. Using the full-automatic pressure measurement kit and the corresponding program provided by the present invention, during pressure measurement, the pressure measurement value is no longer limited by the position change of the pressure sensor, nor by the change of the patient's body position or the height change of the bed, as long as the position of the zero-pressure end and the target zero point is always fixed. No matter where the pressure sensor is placed and what position the patient is in, an accurate pressure value can be measured, improving the accuracy and safety of pressure measurement and providing convenience for pressure monitoring work. Description of the Drawings

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0040] Figure 1 It is a three-dimensional structural schematic diagram of Embodiment 1 in the present invention;

[0041] Figure 2 This is Figure 1 an enlarged schematic diagram of part A in

[0042] Figure 3 Schematic diagram of the working principle of the present invention;

[0043] Figure 4 Schematic cross-sectional view of the zero-pressure end in the present invention;

[0044] Figure 5 Schematic diagram of the exhaust of the second pressure guide tube in the present invention;

[0045] Figure 6 Schematic three-dimensional structure diagram of the second embodiment in the present invention;

[0046] Figure 7 Schematic three-dimensional structure diagram of the zero-pressure end in the present invention;

[0047] Figure 8 Flow chart of the full-automatic pressure measurement method of the first embodiment in the present invention;

[0048] Figure 9 Flow chart of the full-automatic pressure measurement method of the second embodiment in the present invention;

[0049] Figure 10 Clinical experiment photos of the present invention;

[0050] Explanation of the reference numerals in the figure: 1. First pressure sensing unit; 11. Second pressure sensing unit; 12. Base; 13. Wire; 2. Total pressure guide tube; 21. First pressure guide tube; 22. Second pressure guide tube; 23. Two-way valve; 221. Zero-pressure end; 222. Piston; 223. Inner ventilation port; 224. Inner conical port; 225. Inner conical cap; 226. Ventilation housing; 227. Outer ventilation port; 228. Adhesive part; 3. Driving motor; 31. Driving gear; 32. Driven gear. Detailed implementation manners

[0051] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0052] Term explanation: In medical pressure measurement, the target data to be measured is actually pressure data, with units such as mmHg, cmH2O, kPa, Pa, etc. Clinically, it is customary to call pressure as pressure, so the terms "pressure" and "pressure" involved in the present invention have the same meaning; "proximal end", "proximal to the heart end", "distal end", and "distal to the heart end" are relative to the position of the heart. When working, the end of the pipeline close to the heart is the proximal end or the proximal to the heart end, and the end far from the heart is the distal end or the distal to the heart end.

[0053] Example 1

[0054] Please refer to Figures 1-10 , a fully automatic pressure measurement kit provided by the present invention is used to monitor the pressure in a target chamber, such as arterial pressure measurement, central venous pressure measurement, intracranial pressure measurement, etc. It includes a wire 13, a first pressure sensing unit 1, and a main pressure conducting tube 2. One end of the wire 13 is connected to a monitor, and the monitor supplies power to the pressure measurement kit through the wire 13 and extracts data. The first pressure sensing unit 1 is a pressure measurement unit, which can convert the pressure signal in its cavity into an electrical signal and transmit it back to the monitor for analysis and processing. The main pressure conducting tube 2 branches into a first pressure conducting tube 21 and a second pressure conducting tube 22. The pressure conducting tubes are used to conduct pressure, and their lumens are filled with an incompressible low-viscosity fluid, usually physiological saline. At the joints of the main pressure conducting tube 2, the first pressure conducting tube 21, and the second pressure conducting tube 22, a two-way valve 23 or a three-way valve is provided. The function of the two-way valve 23 is to connect the main pressure conducting tube 2 to the first pressure conducting tube 21 or the second pressure conducting tube 22 separately, so that the pressure in the first pressure conducting tube 21 or the second pressure conducting tube 22 can be conducted to the pressure measurement unit separately. The first pressure conducting tube 21 communicates with the target pressure measurement chamber. The target pressure measurement chamber refers to the chamber where the pressure needs to be measured and evaluated. For example, when measuring arterial pressure, the traditional concept is that the target pressure measurement chamber is the aorta; when measuring central venous pressure, the target pressure measurement chamber is the right atrium; when measuring intracranial pressure, the target pressure measurement chamber is the cerebral subarachnoid space. The corresponding target zero points are arterial pressure - the intersection of the midaxillary line and the fourth intercostal space, central venous pressure - the intersection of the midaxillary line and the fourth intercostal space, intracranial pressure - the external auditory canal. The target zero point refers to the horizontal plane corresponding to the target pressure measurement chamber. In traditional direct pressure measurement, the sensor must be placed on the horizontal plane of the target zero point. The end of the second pressure conducting tube 22 is a zero-pressure end 221. The end refers to the farthest end of the second pressure conducting tube 22 away from the pressure sensing unit. The second pressure conducting tube 22 is filled with liquid and the zero-pressure end 221 communicates with the atmosphere. During pressure measurement, the zero-pressure end 221 is placed at the target zero point, and the liquid level in the zero-pressure end 221 is at the same horizontal plane as the target zero point. Specifically, the zero-pressure end 221 is fixedly adhered to the patient's heart position or the external auditory canal level. When the position of the target zero point moves, the zero-pressure end 221 moves accordingly, so that the relative position between the zero-pressure end 221 and the target zero point is always fixed. The zero-pressure end 221 is the reference point where the pressure of the pressure measurement kit is zero during the measurement process;

[0055] The rotation of the two-way valve 23 can be driven by a gear set, which includes a driven gear 32 and a driving gear 31. The shaft of the driven gear 32 is connected to the two-way valve 23, and the shaft of the driving gear 31 is connected to the driving motor 3. The two-way valve 23 can also be rotated manually. The driving motor 3 is powered by the monitor and controlled by the built-in program of the monitor to operate. The angle and direction of each gear rotation are determined according to the shape and direction of the pressure guiding pipe bifurcation and the opening direction of the two-way valve 23, with the aim of making the main pressure guiding pipe 2 communicate with only one of the first pressure guiding pipe 21 and the second pressure guiding pipe 22.

[0056] The fully automatic pressure measurement kit is used in conjunction with a monitor that can drive and control the fully automatic pressure measurement kit, enabling full automation of pressure monitoring. The implementation method is as follows:

[0057] Step 1: Exhaust the fully automatic pressure measurement kit. After connecting all the pipes, zero the first pressure sensing unit 1. Zeroing means communicating the main pressure guiding pipe 2 with the atmosphere and regarding the atmospheric pressure at this time as zero pressure. This step is the basic process of current pressure monitoring. When zeroing, there is no requirement for the position of the first pressure sensing unit 1 because within the reach of medical staff, the difference in atmospheric pressure can be ignored.

[0058] Step 2: Place the zero-pressure end 221 of the second pressure guiding pipe 22 filled with a liquid of known density ρ 液 at the target zero point position, such as pasted to the intersection of the midaxillary line of the patient and the fourth intercostal space, the external auditory canal, or a stable object at the corresponding position, such as a headrest. The first pressure sensing unit 1 is placed at any temporarily fixed position.

[0059] Step 3: The monitor controls the driving motor 3 through the program to drive the gear to rotate, making the main pressure guiding pipe 2 communicate with the second pressure guiding pipe 22, and obtaining the pressure inside the second pressure guiding pipe 22. This pressure value is a fixed value, representing the pressure difference between the target zero point and the first pressure sensing unit 1 at the current position, denoted as △p'. Calculate the height difference △h = △p' / (ρ 液 ·g) between the target zero point and the first pressure sensing unit 1 at the current position through the density ρ 液 of the liquid in the second pressure guiding pipe 2, where g is the acceleration due to gravity.

[0060] Step 4: Calculate the hydrostatic pressure difference △p = ρ 血 g·△h of the blood between the target zero point and the first pressure sensing unit 1 at the current position through the height difference △h and the density ρ 血 of the blood. When the position of the first pressure sensing unit 1 is higher than the target zero point position, △p is negative, and ρ 血 usually takes 1.055×10 3 kg / m 3 ;

[0061] Step 5: The driving motor 3 drives the gear to rotate, so that the total pressure guide tube 2 is communicated with the first pressure guide tube 21, that is, communicated with the target pressure measurement chamber. A pressure value p is measured. If it is arterial pressure measurement, a set of blood pressure values Sp / Dp can be obtained, and the pressure of the target pressure measurement chamber can be calculated as p - Δp. For arterial pressure measurement, it is Sp - Δp / Dp - Δp. If it is necessary to analyze the arterial pressure waveform, each set of blood pressure values in the arterial pressure waveform is subtracted by Δp before analysis;

[0062] Step 6: Thereafter, the monitor automatically analyzes whether the relative position between the first pressure sensing unit 1 and the target zero point has changed through the change of the pressure value or the pressure waveform. When it is judged that there may be a change, the above steps 1 to 5 are started to be repeated; when no change in the relative position is detected, the system automatically repeats the above steps 1 to 5 every interval of time t.

[0063] The method for judging whether the relative position between the first pressure sensing unit 1 and the target zero point has changed is as follows: Compare the pressure measurement value of each cycle with the pressure measurement value of the previous cycle. When the pressure change value exceeds the specified percentage, it can be judged that the relative position between the first pressure sensing unit 1 and the target zero point may have changed, and the above steps 1 to 5 can be started. When the monitored pressure is arterial pressure or central venous pressure, the cycle can be set as the cardiac systolic cycle. When there is no significant cycle for the monitored target, it can be set as the average pressure within a specific time period, such as 30 seconds. The percentage of the pressure change can be set according to the target pressure range. For example, the arterial pressure can be set to 10%, and the central venous pressure can be set to 30%. The monitor can also analyze whether the patient has atrial premature beats, atrial fibrillation, ventricular premature beats, ventricular fibrillation, etc. through the pulse waveform and electrocardiogram waveform. When there are significant changes in the above cardiac activities, the judgment of whether the relative position has changed can be set as the average pressure within a specific time period, or prompt the medical staff to change to the manual mode. In the manual mode, the pressure measurement mode can be set as the traditional pressure measurement mode, and this mode requires more attention from the medical staff.

[0064] The wire for supplying power and programming the driving motor 3 is integrated with the wire 13 of the pressure sensing unit. The interface of the power supply wire of the driving motor 3 is integrated with the interface of the pressure sensing unit, which is convenient for operation and maintenance, and the internal wires are insulated from each other.

[0065] The connections of the total pressure guide tube 2, the first pressure guide tube 21, and the second pressure guide tube 22 and the driving motor 3 are fixed on the same base 12, making the mutual relationship of the gear set more fixed. The gear set is provided with a gear set housing to prevent the gears from being exposed. The first pressure guide tube 21 and the second pressure guide tube 22 are provided with interfaces outside the gear set housing, and the gear set housing can be opened for manual operation.

[0066] The second pressure guiding tube 22 can be improved as follows. A piston 222 is arranged inside the zero-pressure end 221. The zero-pressure end 221 communicates with the atmosphere at the distal end of the piston 222. The piston 222 is a component that can freely move along the long axis within a specified range inside the pipeline. The friction between the piston 222 and the inner wall of the pipeline is small and can be ignored. The function of the piston 222 is to prevent the liquid in the second pressure guiding tube 22 from flowing out of the zero-pressure end 221 and causing air to enter the second pressure guiding tube 22, which may affect the detection accuracy when the zero-pressure end 221 is at a lower position and the proximal end of the second pressure guiding tube 22 is disconnected.

[0067] The longitudinal section of the zero-pressure end 221 of the second pressure guiding tube 22 is trapezoidal conical. The trapezoidal cone refers to the part of the cone that does not include the tip, and its longitudinal section is an isosceles trapezoid. The piston 222 is trapezoidal conical and adapted to the inner wall of the zero-pressure end 221. The outer diameter of the bottom surface of the piston 222 is smaller than the inner diameter of the bottom surface of the trapezoidal cone of the zero-pressure end 221, and the outer diameter of the top surface of the piston 222 is larger than the inner diameter of the top surface of the trapezoidal cone of the zero-pressure end 221. The bottom surface of the trapezoidal cone refers to the circular surface with a larger diameter, and the top surface of the trapezoidal cone refers to the circular surface with a smaller diameter. The trapezoidal conical piston 222 is beneficial to reducing the friction between the piston 222 and the inner wall of the pressure guiding tube when there is no tendency for the liquid to overflow at the zero-pressure end 221, and can effectively block the liquid when there is an accidental tendency for the liquid to overflow at the zero-pressure end 221.

[0068] An air vent housing 226 is arranged outside the zero-pressure end 221. An external air vent 227 is arranged on the air vent housing 226. The liquid inside the zero-pressure end 221 communicates with the atmosphere through the external air vent 227.

[0069] An air vent jacket is arranged outside the air vent housing 226. The air vent jacket can be a sparse sponge-like structure. The air vent jacket allows air to flow freely and can prevent the passage of tiny particles to prevent dust and pollution.

[0070] At the end of the zero-pressure end 221, there is an inner conical opening 224 adapted to the conical head of a standard syringe. On the proximal side wall of the inner conical opening 224, there is an inner ventilation port 223. After the conical head of the syringe is inserted, the outer side wall of the conical head can block the inner ventilation port 223. The inner conical opening 224 is used to fill the second pressure guiding tube 22 with liquid for air exhaust. The zero-pressure end 221 is also provided with an inner conical cap 225, which can block the inner conical opening 224 but cannot block the inner ventilation port 223. Exhaust method: Disconnect the connection between the second pressure guiding tube 22 and the main pressure guiding tube 2, or disconnect the three-way connection at the joint, so that the proximal end of the second pressure guiding tube 22 communicates with the atmosphere. Prepare normal saline in the syringe, insert the syringe from the inner conical opening 224, push the piston 222 towards the proximal end until the piston 222 reaches the proximal end, connect the second pressure guiding tube 22 and the main pressure guiding tube 2, and flush the liquid in the main pressure guiding tube 2 to a specific position at the zero-pressure end 221. The specific position means that the piston 222 is only affected by the buoyancy or pulling force of the liquid in the pressure guiding tube.

[0071] As an alternative exhaust scheme for the zero-pressure end 221, the second pressure guiding tube 22 is provided with a side port at the proximal end of the zero-pressure end 221. The side port is provided with a three-way valve, and the side port can insert the conical head or the needle of the syringe for operations such as air exhaust.

[0072] The connection between the second pressure guiding tube 22 and the two-way valve 23 can be removed. The fully automatic pressure measurement kit is configured with the second pressure guiding tube 22 in a separate package. When the second pressure guiding tube 22 is suspected of being contaminated, the second pressure guiding tube 22 can be removed and discarded, and a new pressure guiding tube can be replaced, or the second pressure guiding tube 22 can be replaced regularly to avoid the possibility of contamination. Since during the entire automatic pressure measurement process, the liquid in the second pressure guiding tube 22 does not directly communicate with the first pressure guiding tube 21, and the liquid in the second pressure guiding tube 22 does not flow and has no nutrients, and with the isolation of the ventilation outer shell 226 and the ventilation outer sleeve, the probability of contamination is very small. Regular replacement can further ensure the cleanliness of the pipeline.

[0073] On the top surface of the driven gear 32, there is an indication mark corresponding to the direction of the built-in two-way valve 23, which is convenient for operation and observation when manual operation is required.

[0074] In order to facilitate the fixation of the relative position between the zero-pressure end 221 and the target zero point, the zero-pressure end 221 is provided with an adhesive part 228 for fixing the zero-pressure end 221 at the target zero point, such as the fourth intercostal space of the midaxillary line, the external auditory canal, or the corresponding headrest.

[0075] This embodiment also provides a technical solution for a monitor. The monitor is provided with an interface or a program, and the interface or the program can drive or program the above-mentioned pressure measurement kit composed of the first pressure sensing unit 1 and the gear set.

[0076] This embodiment also provides a storage device, which is configured with a program capable of executing the full-automatic pressure monitoring method of this embodiment.

[0077] Advantages of Embodiment 1: By providing a pressure measurement kit composed of the first pressure sensing unit 1 and a gear set, full-automatic pressure monitoring is achieved through the program built into the monitor. Fill the second pressure guiding tube 22 in the kit with liquid, fix the zero-pressure end 221 to the target zero point. The height difference between the pressure sensing unit and the target zero point can be measured through the second pressure guiding tube 22. Then, correct the pressure difference caused by the height difference to the pressure sensing unit connected to the first pressure guiding tube 21, and an accurate pressure value can be obtained. When the relative position between the pressure sensing unit and the target zero point changes, the program automatically starts the measurement and corrects the new pressure difference data to the final pressure value. Using the full-automatic pressure measurement kit and the corresponding program provided by the present invention, during the pressure measurement period, the pressure measurement value is no longer limited by the position change of the pressure sensor, nor by the change of the patient's body position or the height change of the bed. As long as the position of the zero-pressure end 221 and the target zero point is always fixed, accurate pressure values can be measured regardless of the position of the pressure sensor and the patient's body position, improving the accuracy and safety of pressure measurement and providing convenience for pressure monitoring work.

[0078] Compared with Embodiment 2, the technical solution of Embodiment 1 has a lower cost.

[0079] Embodiment 2

[0080] Please refer to Figures 1-10 and especially refer to Figure 6 , the present invention also provides another full-automatic pressure measurement kit for achieving full-automatic pressure measurement, including a first pressure sensing unit 1 and a second pressure sensing unit 11. The first pressure sensing unit 1 is connected to a first pressure guiding tube 21, and the first pressure guiding tube 21 communicates with the target pressure measurement cavity. The second pressure sensing unit 11 is connected to a second pressure guiding tube 22, and the end of the second pressure guiding tube 22 is the zero-pressure end 221. The second pressure guiding tube 22 is filled with liquid and the zero-pressure end 221 communicates with the atmosphere. During pressure measurement, the first pressure sensing unit 1 and the second pressure sensing unit 11 are always at the same horizontal plane, the zero-pressure end 221 is placed at the target zero point and is always at the same horizontal plane as the target zero point. The second pressure sensing unit 11 monitors the pressure difference △p between it and the target zero point in real time to correct the pressure value measured by the first pressure sensing unit 1 in real time. There is no need to set up a gear set, avoiding the correction delay caused by the pressure measurement kit with a gear set and simplifying the pressure correction program.

[0081] The full-automatic pressure measurement implementation method of Embodiment 2 is as follows:

[0082] Step a: Zero the first pressure sensing unit 1 and the second pressure sensing unit 11. The first pressure sensing unit 1 is connected and communicated with the first pressure guiding tube 21, and the second pressure sensing unit 11 is connected and communicated with the second pressure guiding tube 22;

[0083] Step b: The zero pressure end 221 and the target zero point are fixed through the pasting part 228, such as the position of the fourth intercostal space in the midaxillary line, the level of the external auditory canal, etc.;

[0084] Step c: Obtain the pressure in the second pressure guiding tube 22. This pressure value is a fixed value, which represents the pressure difference between the target zero point and the second pressure sensing unit 11, denoted as △p'. Calculate the height difference △h between the target zero point and the second pressure sensing unit 11 through the density ρ of the liquid in the second pressure guiding tube 2, where △h = △p' / (ρ 液 ·g), and g is the acceleration due to gravity; 液 ·g), where g is the acceleration due to gravity;

[0085] Step d: Calculate the blood static pressure difference △p between the target zero point and the second pressure sensing unit 11 through the height difference △h and the density ρ of the blood 血 Calculate the blood static pressure difference △p between the target zero point and the second pressure sensing unit 11 through the height difference △h and the density ρ of the blood, where △p = ρ 血 g·△h. When the position of the second pressure sensing unit 11 is higher than the position of the target zero point, △p is negative;

[0086] Step e: The first pressure sensing unit 1 measures a pressure value p. If it is arterial pressure measurement, a set of blood pressure values Sp / Dp can be obtained, and then the pressure of the target pressure measurement chamber can be calculated as p - △p. For arterial pressure measurement, it is Sp - △p / Dp - △p. If it is necessary to analyze the arterial pressure waveform, each set of blood pressure values in the arterial pressure waveform is subtracted by △p before analysis;

[0087] Step f: When the relative position between the second pressure sensing unit 11 and the target zero point changes, the second pressure sensing unit 11 can immediately detect the change and obtain a new △p, and then bring the new △p into the first pressure sensing unit 1 in real time according to the method in step e to calibrate the pressure measurement value of the first pressure sensing unit 1 in real time.

[0088] Embodiment 2 also provides a technical solution for a monitor. The monitor is provided with an interface or a program, and the interface or the program can drive or program the above-mentioned pressure measurement kit composed of the first pressure sensing unit 1 and the second pressure sensing unit 11.

[0089] Embodiment 2 also provides a storage device, and the storage device is configured with a program that can execute the full-automatic pressure monitoring method of this embodiment.

[0090] Advantages of Embodiment 2: By providing a pressure measurement kit composed of a first pressure sensing unit 1 and a second pressure sensing unit 11 located on the same horizontal plane, full automation of pressure monitoring is achieved through the program built into the monitor. The second pressure guiding tube 22 in the kit is filled with liquid, and the zero pressure end 221 is fixed to the target zero point. The height difference between the pressure sensing unit and the target zero point can be measured through the second pressure guiding tube 22, and the pressure difference caused by the height difference is corrected in real time to the pressure sensing unit communicated with the first pressure guiding tube 1, so as to obtain an accurate pressure value. When the relative position between the pressure sensing unit and the target zero point changes, the second pressure sensing unit 11 can immediately obtain the pressure difference value and correct the new pressure difference data to the final pressure value in real time. Using the fully automatic pressure measurement kit and the corresponding program provided by the present invention, during the pressure measurement period, the pressure measurement value is no longer limited by the position change of the pressure sensor, nor by the change of the patient's body position or the height change of the bed. As long as the position of the zero pressure end and the target zero point is fixed, no matter where the pressure sensor is placed and what position the patient is in, an accurate pressure value can be measured, improving the accuracy and safety of pressure measurement and providing convenience for pressure monitoring work.

[0091] Compared with Embodiment 1, the advantage of Embodiment 2 lies in that: there is no need to develop a program for judging whether the relative position between the second pressure sensing unit 11 and the target zero point changes. The second pressure sensing unit 11 can obtain the pressure difference value caused by the relative position change in real time and correct it to the pressure measurement value of the first pressure sensing unit 1 in real time. The program is simpler and the data correction is more timely.

[0092] To verify the content of the present invention, the inventors conducted the following experiment. Please refer to Figure 10: Select a patient with relatively stable blood pressure. Place the arterial pressure sensor at the heart level. Measure the patient's arterial blood pressure as 159 / 45 mmHg through the arterial catheterization of the patient. Then raise the pressure sensor by about 40 cm. Connect an extension tube filled with normal saline containing methylene blue at the distal end of the pressure sensor through a three-way stopcock. The proximal end of the extension tube communicates with the pressure sensor, and the distal end of the extension tube is open to the atmosphere and placed at the heart level. At this time, the open distal end of the extension tube is regarded as the zero-pressure end 221 in the invention. The pressure value △p measured by the pressure sensor is -35 mmHg. Keep the height of the pressure sensor unchanged. Rotate the three-way stopcock to make the pressure sensor communicate with the arterial catheter in the patient. Measure the pressure value Sp / Dp at this time as 115 / 2 mmHg. Subtract (-35 mmHg) from 115 / 2 mmHg to get 150 / 37 mmHg, which is very close to the true blood pressure value of 159 / 45 mmHg. Analyze the error: The systolic / diastolic blood pressure of the true blood pressure value and the calculated blood pressure value differ by about 8 mmHg. The reasons may be as follows: 1) Inspection reveals that there is an air column at the uppermost end of the extension tube, making the measured △p smaller; 2) The density of the saline is about 1.010×10 3 kg / m 3 , while the density of the blood is about 1.055×10 3 kg / m 3 , which can cause an error of about 5%. The above deviations can be eliminated by the second pressure guiding tube 22 solution provided by the present invention and the correction of the density difference by the built-in program.

[0093] Regarding Figure 3 the pressure measurement principle description, the direct arterial pressure measurement guide recommends that "the zero position of the sensor during pressure measurement is the midaxillary line in the supine position, but when the patient is in the semi-sitting position, sitting position or beach chair position, the zero point of the sensor should be at the level of the external auditory meatus, because the arterial pressure at the level of the external auditory meatus can better reflect the cerebral blood flow perfusion pressure than the arterial pressure at the heart level and avoid insufficient cerebral perfusion". The guide is likely to mislead medical staff to always place the sensor zero point at the heart level and ignore the situations of other body positions. Therefore, the present inventor suggests here: The zero point position of the sensor should be determined according to the purpose of pressure measurement. When the purpose of monitoring is to maintain cerebral perfusion, the sensor zero point level should be placed at the level of the external auditory meatus. The level of the external auditory meatus is applicable to the vast majority of arterial pressure measurements, especially in the deep anesthesia state. The patient loses the ability to autoregulate blood pressure. As the patient's head position is passively elevated, the patient's blood pressure drops suddenly, and the pressure drop at the cerebral level is more obvious. If the heart level is used as the standard, the possibility of cerebral ischemia infarction can be greatly increased. Therefore, it is safer to place the sensor at the level of the external auditory meatus; when the purpose of pressure monitoring is to evaluate cardiac function and related indicators, the sensor position should be placed at the heart level. Therefore, the embodiment of the present invention selects the more widely applicable level of the external auditory meatus.

[0094] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected", and "coupled" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A fully automatic pressure measurement kit, comprising a wire, a first pressure sensing unit, and a main pressure guiding tube. The main pressure guiding tube branches into a first pressure guiding tube and a second pressure guiding tube. It is characterized in that: Two-way valves are provided at the joints of the main pressure guiding tube, the first pressure guiding tube, and the second pressure guiding tube. The two-way valves enable the main pressure guiding tube to be only connected to the first pressure guiding tube or the second pressure guiding tube separately; the first pressure guiding tube communicates with the target pressure measurement chamber, the end of the second pressure guiding tube is the zero-pressure end, the second pressure guiding tube is filled with liquid and the zero-pressure end communicates with the atmosphere, and the zero-pressure end is always placed at the target zero point during pressure measurement; The rotation of the two-way valve can be driven by a gear set. The gear set includes a driven gear and a driving gear. The shaft of the driven gear is connected to the two-way valve, and the shaft of the driving gear is connected to a driving motor.

2. A fully automatic pressure measurement kit, comprising a first pressure sensing unit and a second pressure sensing unit. The first pressure sensing unit is connected to the first pressure guiding tube, and the first pressure guiding tube communicates with the target pressure measurement chamber. The second pressure sensing unit is connected to the second pressure guiding tube, the end of the second pressure guiding tube is the zero-pressure end, the second pressure guiding tube is filled with liquid and the zero-pressure end communicates with the atmosphere, and the first pressure sensing unit and the second pressure sensing unit are always located on the same horizontal plane during pressure measurement, and the zero-pressure end is always placed at the target zero point.

3. The fully automatic pressure measurement kit according to claim 1, characterized in that: A piston is provided inside the zero-pressure end, and the zero-pressure end communicates with the atmosphere at the distal end of the piston.

4. A fully automatic pressure measurement kit according to claim 1, characterized in that: The driving motor is powered by a monitor and is controlled by a program built into the monitor to operate.

5. The full-automatic pressure measurement kit according to claim 1, wherein: The joints of the main pressure guiding tube, the first pressure guiding tube, and the second pressure guiding tube and the driving motor are fixed on the same base. The gear set is provided with a gear set housing. The first pressure guiding tube and the second pressure guiding tube are provided with interfaces outside the gear set housing, and the gear set housing can be opened.

6. The fully automatic pressure measurement kit according to claim 3, characterized in that: The longitudinal section of the zero-pressure end of the second pressure guiding tube is trapezoidal conical. The piston is trapezoidal conical and adapted to the inner wall of the zero-pressure end. The outer diameter of the bottom surface of the piston is smaller than the inner diameter of the bottom surface of the trapezoidal cone of the zero-pressure end, and the outer diameter of the top surface of the piston is larger than the inner diameter of the top surface of the trapezoidal cone of the zero-pressure end.

7. The fully automatic pressure measurement kit according to claim 3, wherein: The end of the zero-pressure end is provided with an inner conical opening adapted to the cone head of a standard syringe. An inner ventilation port is provided on the proximal side wall of the inner conical opening. After the cone head is inserted, the outer side wall of the cone head can block the inner ventilation port; the zero-pressure end is also provided with an inner cone cap, and the inner cone cap can block the inner conical opening but cannot block the inner ventilation port.

8. A fully automatic pressure measurement kit according to claim 1, characterized in that: The second pressure guiding tube is provided with a side port at the proximal end of the zero-pressure end.

9. A fully automatic pressure measurement kit according to claim 1, characterized in that: A ventilation housing is provided outside the zero-pressure end, and an outer ventilation port is provided on the ventilation housing.

10. The fully automatic pressure measurement kit according to claim 9, characterized in that: A ventilation outer sleeve is provided outside the ventilation housing. The ventilation outer sleeve allows air to circulate freely to prevent dust and pollution.

11. A fully automatic pressure measurement kit according to claim 1, characterized in that: The zero-pressure end is provided with an adhesive part for fixing the zero-pressure end at the target zero point.

12. A fully automatic pressure monitoring method for realizing the automatic pressure measurement of a fully automatic pressure measurement kit as described in claim 1, characterized in that Including the following steps: Step 1, zero the first pressure sensing unit; Step 2, place the zero-pressure end of the second pressure guiding tube at the target zero point position; Step 3: The drive motor drives the gear to rotate, connecting the main pressure guide pipe and the second pressure guide pipe, obtaining the pressure in the second pressure guide pipe, denoted as Δp', and calculating, through the density ρ of the liquid in the second pressure guide pipe, the height difference Δh between the target zero point and the first pressure sensing unit at the current position: Δh = Δp' / (ρ liquid · g); 液 The height difference Δh between the target zero point and the first pressure sensing unit at the current position is calculated as Δh = Δp' / (ρ liquid · g); Step 4, based on the height difference Δh and the density ρ of the blood 血 calculate the blood hydrostatic pressure difference Δp of the first pressure sensing unit at the target zero point relative to the current position: Δp = ρ 血 g·Δh; Step 5, the driving motor drives the gear to rotate, so that the main pressure guiding tube is connected to the first pressure guiding tube, and each / group of pressure values p or S p / D p is measured. Then the pressure of the target pressure measurement chamber is p - △p, or S p - △p / D p - △p; Step 6, repeat the above steps 1 to 5 in the following situations: when the system detects that the relative position between the first pressure sensing unit and the target zero point may change or after every specified time period.

13. A fully automatic pressure monitoring method for realizing the automatic pressure measurement of a fully automatic pressure measurement kit as described in claim 2, characterized in that Including the following steps: Step a: Zero the first pressure sensing unit and the second pressure sensing unit. The first pressure sensing unit is connected and communicated with the first pressure guiding tube, and the second pressure sensing unit is connected and communicated with the second pressure guiding tube; Step b: Fix the zero pressure end to the target zero point; Step c: Obtain the pressure inside the second pressure guiding tube, denoted as Δp', and calculate the height difference Δh between the target zero point and the second pressure sensing unit through the density ρ of the liquid inside the second pressure guiding tube 液 as Δh = Δp' / (ρ 液 ·g); Step d: Based on the height difference Δh and the density ρ of the blood 血 calculate the blood hydrostatic pressure difference Δp between the target zero point and the second pressure sensing unit as Δp = ρ 血 g·Δh; Step e: If the first pressure sensing unit measures each / group of pressure values p or S p / D p, then the pressure of the target pressure measuring chamber is p - △p, or S p - △p / D p - △p; Step f: When the relative position of the second pressure sensing unit changes with respect to the target zero point, the second pressure sensing unit can immediately detect the change and obtain a new △p, and then substitute the new △p into the measured value of the first pressure sensing unit in real time according to the method in Step e for real-time calibration.

14. A monitor, characterized in that: The monitor is provided with an interface or program capable of driving or programming a fully automatic pressure measurement kit according to any one of claims 1 and 2.

15. A storage device, characterized in that: The storage device is configured with a program capable of executing the fully automatic pressure monitoring method according to any one of claims 12 and 13.

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