Physiological parameter display method and device, equipment and storage medium

Abstract

The invention relates to the technical field of medical equipment, and discloses a physiological parameter display method and device, equipment and a storage medium. The current blood pressure waveform is analyzed to determine the cardiac cycle and the heart rate of the target object, and the cardiac cycle comprises a rapid ejection period, a slow ejection period and a diastolic period; based on the current blood pressure waveform, the blood discharge amount of the target object in the rapid ejection period and the slow ejection period and the basic blood amount of the target object in the diastolic period are determined, and the current blood amount is obtained; determining the current cardiac volume of the target object based on the heart rate and the current blood volume; and displaying the current cardiac displacement on the target interface. The method can improve the accuracy of cardiac displacement calculation.

Description

Technical Field

[0001] The present invention relates to the technical field of medical equipment, and in particular to a method, device, equipment and storage medium for displaying physiological parameters. Background Art

[0002] Hemodynamics refers to the mechanics of blood flow in the cardiovascular system. It organically combines the theories and methods of mechanics with those of biology and medicine to study the mechanical properties of blood and blood vessels, analyze the flow patterns of blood in the cardiovascular system, and thus quantify the regularity of blood movement in the circulatory system.

[0003] In the prior art, the determination of hemodynamic parameters generally adopts the cardiac output method. The cardiac output method is a method of continuously but indirectly calculating the beat-by-beat cardiac output using various characteristics of the arterial pressure waveform. However, this waveform-based estimation depends not only on the stroke volume, but also on parameters such as aortic impedance and vascular compliance that vary nonlinearly between individuals. It is necessary to establish a suitable hemodynamic model to explain the relationship between the various parameters.

[0004] Therefore, the current calculation of cardiac output depends to a large extent on the assumed correlation, that is, it is based on the discarding of the details of the cardiac cycle, which brings large errors to the calculation of stroke volume and is not easy to observe. Summary of the invention

[0005] In view of this, the present invention provides a method, device, equipment and storage medium for displaying physiological parameters to solve the problem of low accuracy of cardiac output calculated in the prior art.

[0006] In a first aspect, the present invention provides a method for displaying physiological parameters, the method comprising:

[0007] Obtaining the current blood pressure waveform of the target subject;

[0008] Analyzing the current blood pressure waveform to obtain vascular environmental parameters and heart rate of the target subject, wherein the vascular environmental parameters are used to characterize vascular compliance and vascular resistance;

[0009] determining a current cardiac output of the target subject based on the vascular environment parameter and the heart rate;

[0010] The current cardiac output is displayed on a target interface.

[0011] The method for displaying physiological parameters provided by an embodiment of the present invention can obtain the vascular environment parameters and heart rate of the target object based on the waveform information of the current blood pressure waveform, and then determine the current cardiac output of the target object based on the vascular environment parameters and heart rate of the target object, thereby providing necessary conditions for the accurate display of the physiological parameters of the target object; displaying the current cardiac output on the target interface provides great convenience and reliability for obtaining the current cardiac output.

[0012] In some optional embodiments, determining the current cardiac output of the target subject based on the vascular environment parameter and the heart rate includes:

[0013] Obtain feature control parameters;

[0014] Based on the characteristic control parameters, the vascular environment parameters and the heart rate, the current cardiac output of the target subject is determined.

[0015] The method for displaying physiological parameters provided by the embodiment of the present invention corrects the current blood volume through characteristic control parameters, thereby making the current cardiac output obtained more accurate and reliable.

[0016] In some optional implementations, the acquiring characteristic control parameters includes:

[0017] Acquiring vital sign information of the target object;

[0018] Determine characteristic control parameters based on the vital sign information.

[0019] The method for displaying physiological parameters provided in an embodiment of the present invention can improve the rationality of the determined characteristic regulation parameters by determining the characteristic regulation parameters based on the vital sign information of the target object, and provide necessary conditions for subsequent adjustment of cardiac output through the acquisition of the characteristic regulation parameters.

[0020] In some optional implementations, analyzing the current blood pressure waveform to obtain the vascular environment parameters of the target object includes:

[0021] Obtaining the period area of ​​the current blood pressure waveform;

[0022] A blood vessel environment parameter of the target object is obtained based on the periodic area.

[0023] The method for displaying physiological parameters provided by an embodiment of the present invention determines the vascular environmental parameters through the periodic area of ​​the current blood pressure waveform, so that the vascular environmental parameters can effectively reflect the speed of response under the current cardiac state, improve the rationality of the vascular environmental parameters, and provide the necessary conditions for the accurate calculation of the current cardiac output through the determination of the vascular environmental parameters.

[0024] In some optional implementations, the analyzing the current blood pressure waveform to obtain the vascular environment parameters of the target object further includes:

[0025] Converting the current blood pressure waveform into a pulse pressure waveform in target polar coordinates so that the current blood pressure waveform and the measured blood pressure waveform are in the same coordinate system;

[0026] The pulse pressure waveform is analyzed to obtain the vascular environment parameters of the target object.

[0027] The method for displaying physiological parameters provided in an embodiment of the present invention can effectively adjust the current blood pressure waveform through target polar coordinate conversion, solve the difference influence between different waveforms, and provide necessary conditions for accurate calculation of current cardiac output through determination of the vascular environment parameters.

[0028] In some optional implementations, analyzing the pulse pressure waveform to obtain the vascular environment parameters of the target object includes:

[0029] Acquire the decay time of the pulse pressure waveform at the target polar coordinates, and the decay value of the pulse pressure waveform that continuously decays within the decay time;

[0030] The blood vessel environment parameter is determined based on the attenuation time and the attenuation value.

[0031] The method for displaying physiological parameters provided by the embodiment of the present invention effectively simplifies the process of determining vascular environmental parameters by determining vascular environmental parameters based on attenuation time and attenuation value, and also provides necessary conditions for accurate calculation of current cardiac output.

[0032] In some optional embodiments, determining the current cardiac output of the target subject based on the vascular environment parameter and the heart rate includes:

[0033] Determining characteristic waveform data in the current blood pressure waveform, wherein the characteristic waveform includes waveform data of a rapid ejection period, a slow ejection period, and a diastolic period;

[0034] The current cardiac output is obtained based on the characteristic waveform data, the vascular environment parameters and the heart rate.

[0035] The method for displaying physiological parameters provided by the embodiment of the present invention calculates the current blood volume through characteristic waveform data, vascular environment parameters and heart rate, so that the current cardiac output obtained is more accurate and reliable.

[0036] In some optional embodiments, the determining the current cardiac output of the target subject based on the vascular environment parameter and the heart rate further includes:

[0037] Get the calibration factor;

[0038] Based on the vascular environment parameter and the heart rate, obtaining an initial value of the current cardiac output;

[0039] The initial value of the current cardiac output is calibrated based on the calibration factor to obtain the current cardiac output.

[0040] The method for displaying physiological parameters provided by the embodiment of the present invention further corrects the current cardiac output by means of a calibration factor, thereby further improving the accuracy of the calculation of the current cardiac output.

[0041] In a second aspect, the present invention provides a display device for physiological parameters, the device comprising:

[0042] A data acquisition module, used to acquire the current blood pressure waveform of the target object;

[0043] A waveform analysis module, used to analyze the current blood pressure waveform to obtain the vascular environment parameters and heart rate of the target object, wherein the vascular environment parameters are used to characterize vascular compliance and vascular resistance;

[0044] a cardiac output calculation module, configured to determine the current cardiac output of the target subject based on the vascular environment parameter and the heart rate;

[0045] The physiological parameter display module is used to display the current cardiac output on the target interface.

[0046] In a third aspect, the present invention provides a medical device, comprising: a host, used to execute the method for displaying physiological parameters of the above-mentioned first aspect or any corresponding embodiment; and a display, communicatively connected to the host, for displaying the current cardiac output on a target interface.

[0047] In a fourth aspect, the present invention provides a computer-readable storage medium having computer instructions stored thereon, the computer instructions being used to enable a computer to execute the method for displaying physiological parameters of the first aspect or any corresponding embodiment thereof.

[0048] It should be noted that the corresponding beneficial effects of the display device, medical equipment and computer-readable storage medium of physiological parameters provided by the embodiments of the present invention can be found in the description of the corresponding beneficial effects of the display method of physiological parameters above, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0050] Figure 1 is a schematic diagram of an application scenario of an embodiment of the present invention;

[0051] Figure 2 is a flow chart of a method for displaying physiological parameters according to an embodiment of the present invention;

[0052] Figure 3 It is a schematic diagram of the attenuation of the pulse pressure waveform in polar coordinates;

[0053] Figure 4 is a flow chart of another method for displaying physiological parameters according to an embodiment of the present invention;

[0054] Figure 5 is a flow chart of another method for displaying physiological parameters according to an embodiment of the present invention;

[0055] Figure 6 is a data flow diagram of a method for displaying physiological parameters according to an embodiment of the present invention;

[0056] Figure 7 It is a schematic diagram of a model in the calculation of physiological parameters;

[0057] Figure 8 It is another model schematic diagram in the calculation of physiological parameters;

[0058] Fig. 9 It is another schematic diagram of a model in the calculation of physiological parameters;

[0059] Fig.10 is a structural block diagram of a display device for physiological parameters according to an embodiment of the present invention;

[0060] Fig.11 It is a schematic diagram of the hardware structure of the medical device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0061] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0062] The terms "first" and "second" in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the term "comprising" and any variation thereof are intended to cover non-exclusive protection. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units that are not listed, or may optionally include other steps or units that are inherent to these processes, methods, products or devices. "Multiple" in the present invention may mean at least two, for example, two, three or more, which is not limited in the embodiments of the present invention.

[0063] See also Figure 1 , Figure 1 It is a schematic diagram of an application scenario provided by an embodiment of the present invention, in which the medical device 100 is connected to a blood pressure measuring device, which measures the blood pressure of a target object to obtain a current blood pressure waveform; the current blood pressure waveform is then transmitted to the medical device 100, or the medical device 100 is integrated with a blood pressure measurement function to measure the blood pressure of the target object.

[0064] The medical device 100 may independently display the test results, or upload the test results to the central station 200, and display the test results of each target object in the central station 200. The connection between the central station 200 and each medical device 100 may be through a network 300.

[0065] Optionally, the medical device 100 may be, but is not limited to, a terminal capable of computing data, such as a medical tablet, and the network may include, but is not limited to, a wireless network or a wired network. The wireless network includes: Bluetooth, WIFI (Wireless Fidelity) and other networks that implement wireless communications. The wired network may include, but is not limited to: a wide area network, a metropolitan area network, and a server cluster. The central station 200 may include, but is not limited to, any hardware device capable of computing.

[0066] In addition, in this embodiment, the above-mentioned method for displaying physiological parameters can also be applied to, but not limited to, an independent processing device with a relatively powerful processing capability without data interaction. For example, the processing device can be, but not limited to, a terminal device with a relatively powerful processing capability, that is, each operation in the above-mentioned method for displaying physiological parameters can be integrated in an independent processing device. The above is only an example, and this embodiment does not make any limitation to this.

[0067] According to an embodiment of the present invention, an embodiment of a method for displaying physiological parameters is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0068] In this embodiment, a method for displaying physiological parameters is provided, which can be used in the above-mentioned medical equipment. Figure 2 is a flow chart of a method for displaying physiological parameters according to an embodiment of the present invention. Figure 2 As shown, the process includes the following steps:

[0069] Step S201, obtaining the current blood pressure waveform of the target object.

[0070] The current blood pressure waveform of the target object is acquired so as to obtain the cardiac cycle and heart rate of the target object based on the waveform information of the current blood pressure waveform.

[0071] In some optional implementations, the target object may be measured by a blood pressure measuring device to obtain the current blood pressure waveform of the target object. The blood pressure measuring device may be desktop or portable, which is not limited here.

[0072] Step S202: Analyze the current blood pressure waveform to obtain the vascular environment parameters and heart rate of the target object.

[0073] Among them, vascular environmental parameters are used to characterize vascular compliance and vascular resistance. By analyzing the current blood pressure waveform, the vascular environmental parameters and heart rate of the target object are obtained to provide necessary conditions for calculating the current cardiac output.

[0074] In some optional implementations, the current blood pressure waveform is first analyzed to obtain waveform characteristic data of the current blood pressure waveform, such as waveform characteristic points; and then the cardiac cycle of the target object is determined based on the waveform characteristic points of the current blood pressure waveform.

[0075] Specifically, the target object's blood volume in the rapid ejection period and the slow ejection period and the basal blood volume in the diastole period can be determined based on the current blood pressure waveform to obtain the current blood volume. The target object's blood volume in the rapid ejection period and the slow ejection period and the basal blood volume in the diastole period can be determined based on the current blood pressure waveform, and then the current blood volume can be obtained based on the blood volume and the basal blood volume, so as to calculate the current cardiac output of the target object based on the current blood volume.

[0076] In some optional embodiments, the first ejection volume of the rapid ejection period, the second ejection volume of the slow ejection period, and the basic blood volume of the diastolic period can be first obtained; then the blood displacement is obtained based on the first ejection volume and the second ejection volume; the current blood volume of the target object is obtained based on the blood displacement and the basic blood volume; by obtaining the first ejection volume of the rapid ejection period, the second ejection volume of the slow ejection period, and the basic blood volume of the diastolic period, the necessary conditions for calculating the current blood displacement of the target object are provided; by obtaining the blood displacement based on the first ejection volume and the second ejection volume, the necessary conditions for calculating the blood displacement of the entire cardiac cycle are provided. It can be understood that the blood displacement is the ejection volume of the first ejection period plus the blood volume ejected by the slow ejection process in the slow ejection period. By summing the blood displacement and the basic blood volume, the current blood volume of the target object is obtained, which provides the necessary conditions for calculating the current cardiac output of the target object.

[0077] In some optional embodiments, before obtaining the first ejection volume of the rapid ejection period, the second ejection volume of the slow ejection period, and the basal blood volume of the diastolic period, firstly, based on the waveform information of the rapid ejection period on the current blood pressure waveform, the current blood pressure waveform is converted into a pulse pressure waveform in polar coordinates; then, the decay time of the pulse pressure waveform in polar coordinates and the decay value of the continuous decay of the pulse pressure waveform during the decay time are obtained; finally, based on the decay time and the decay value, the vascular environment parameters are determined. The vascular environment parameters are used to characterize vascular compliance and vascular resistance.

[0078] In specific implementation, since the vascular environment parameters can have a great impact on the response speed and blood output of the cardiac cycle, and the pulse pressure is currently used to measure the response speed of the cardiac cycle, this understanding is one-sided, which will produce large errors. Therefore, it is possible to obtain multiple blood pressure waveforms with different heart rates and blood pressure conditions, and convert all blood pressure waveforms to a comparable polar coordinate system, that is, the target polar coordinates, to obtain pulse pressure waveforms at different angles, and adjust the size of the relative pulse pressure during the conversion process. The target polar coordinates are obtained by converting multiple measured blood pressure waveforms into polar coordinates. For example, the parameters of the template pulse pressure waveform are determined from the converted multiple pulse pressure waveforms (such as a pulse pressure waveform with an angle of ∮1, a pulse pressure waveform with an angle of ∮2, and a pulse pressure waveform with an angle of ∮3), such as a pulse pressure waveform with an angle of ∮2, and then the current blood pressure waveform is converted into a pulse pressure waveform using the waveform parameters of the template pulse pressure waveform, such as the starting point coordinates; then based on the decay time of the pulse pressure waveform in the polar coordinates, and the decay value of the continuous decay of the pulse pressure waveform during the decay time, the vascular environment parameter RC is determined, such as Figure 3 As shown, the expression is: Among them, T 减 is the decay time, PP is the pulse pressure, and ln(PP) is the decay value of the pulse pressure waveform that continues to decay during the decay time.

[0079] It can be understood that the present invention uses the vascular environment parameter RC calculated by the waveform adjusted by polar coordinate system transformation, analyzes the waveform characteristics of the current blood pressure waveform, calculates each cardiac cycle in combination with vital sign information, and then determines the hemodynamic parameters in the physiological parameters.

[0080] In some optional embodiments, when obtaining the first ejection volume of the rapid ejection period, the second ejection volume of the slow ejection period, and the basal blood volume of the diastolic period, the vascular environmental parameters and the arterial environmental parameters of the target object are first obtained, and the arterial environmental parameters are used to characterize the arterial resistance; then, the basal blood volume is determined based on the waveform information of the diastolic period on the current blood pressure waveform and the vascular environmental parameters; the first ejection volume is determined based on the basal blood volume, the waveform information of the rapid ejection period on the current blood pressure waveform, and the vascular environmental parameters; the second ejection volume is determined based on the basal blood volume, the waveform information of the slow ejection period on the current blood pressure waveform, the vascular environmental parameters, and the arterial environmental parameters.

[0081] Specifically, when determining the basal blood volume based on the waveform information of the diastole period on the current blood pressure waveform and the vascular environmental parameters, first obtain the third position information of the diastole period on the current blood pressure waveform; then determine the third blood flow of the target object in the diastole period based on the waveform information of the current blood pressure waveform under the third position information and the vascular environmental parameters, such as obtaining the third blood flow of the target object at each moment in the diastole based on the ratio of the blood pressure value at each moment in the current blood pressure waveform to the vascular environmental parameters; finally, determine the basal blood volume based on the third blood flow in the diastole.

[0082] Specifically, when determining the second ejection volume based on the basal blood volume, the waveform information of the rapid ejection period on the current blood pressure waveform, and the vascular environmental parameters, first obtain the first position information of the rapid ejection period on the current blood pressure waveform; then determine the first blood flow of the target object during the rapid ejection period based on the waveform information of the current blood pressure waveform under the first position information and the vascular environmental parameters, such as obtaining the first blood flow of the target object at each moment during the rapid ejection period based on the product of the differential of the blood pressure value at each moment in the current blood pressure waveform and the vascular environmental parameters; finally, determine the first ejection volume based on the basal blood volume and the first blood flow during the rapid ejection period.

[0083] Specifically, when determining the second ejection volume based on the basal blood volume, the waveform information of the slow ejection period on the current blood pressure waveform, the vascular environment parameters, and the arterial environment parameters, first obtain the second position information of the slow ejection period on the current blood pressure waveform; then determine the second blood flow of the target object in the slow ejection period based on the waveform information of the current blood pressure waveform under the second position information, the arterial environment parameters, and the vascular environment parameters; finally, determine the second ejection volume based on the basal blood volume and the second blood flow in the slow ejection period. It can be understood that slowing the ejection period is a complex process, which is not a simple process of slowing ejection, but a process of transforming from a slow ejection process to a light regurgitation until the aortic valve is closed.

[0084] Among them, arterial resistance can be directly obtained by dividing the difference between the peak blood pressure value and the trough blood pressure value in the current blood pressure waveform by the peak blood pressure value, and can also be measured by an ultrasonic sensor.

[0085] Furthermore, when obtaining the vascular environment parameters of the target object, the period area of ​​the current blood pressure waveform can be obtained; based on the period area, the vascular environment parameters of the target object are obtained. The current blood pressure waveform can also be converted into a pulse pressure waveform under the target polar coordinates so that the current blood pressure waveform and the measured blood pressure waveform are in the same coordinate system; the pulse pressure waveform is analyzed to obtain the vascular environment parameters of the target object.

[0086] Specifically, first convert the current blood pressure waveform into a pulse pressure waveform in polar coordinates; obtain the decay time of the pulse pressure waveform in polar coordinates, and the decay value of the pulse pressure waveform during the decay time; determine the vascular environment parameters based on the decay time and the decay value, that is, use the polar coordinate conversion diagram method to calculate the vascular environment parameters of the target object. Optionally, the vascular environment parameters can also be determined based on the area of ​​the current blood pressure waveform under its own waveform contour, that is, use the periodic area method to calculate the vascular environment parameters of the target object, that is, RC is the vascular environment parameter, and P is the current blood pressure waveform.

[0087] Step S203, determining the current cardiac output of the target subject based on the vascular environment parameters and the heart rate.

[0088] By determining the current cardiac output of the target object based on the vascular environment parameters and the heart rate, the necessary conditions are provided for displaying the physiological parameters of the target object.

[0089] In some optional embodiments, when determining the current cardiac output of the target object based on vascular environmental parameters and heart rate, the characteristic waveform data in the current blood pressure waveform can be determined first; based on the characteristic waveform data, vascular environmental parameters and heart rate, the current cardiac output is obtained.

[0090] First, characteristic control parameters for regulating the current blood volume are obtained, and the characteristic control parameters are obtained based on the current blood pressure waveform; then, the adjusted blood output is obtained based on the current blood volume and the characteristic control parameters; finally, the current cardiac output of the target object is determined based on the heart rate and the adjusted blood output.

[0091] In some optional embodiments, a calibration factor for calibrating the current cardiac output can also be obtained; then, the adjusted blood output is obtained based on the current blood volume and characteristic control parameters; finally, the current cardiac output of the target object is determined based on the heart rate, the calibration factor, and the adjusted blood output.

[0092] Furthermore, when obtaining characteristic control parameters for regulating the current blood output, firstly, the average actual blood output of the target object in multiple cardiac cycles is obtained; based on the difference between the average actual blood output and the current blood output, the characteristic control parameters are determined.

[0093] Furthermore, when acquiring characteristic control parameters for regulating the current blood output, vital sign information of the target object may also be acquired; and characteristic control parameters for regulating the current blood output may be determined based on the vital sign information and / or the current blood pressure waveform.

[0094] Step S204, displaying the current cardiac output on the target interface.

[0095] By displaying the current cardiac output on the target interface, great convenience and reliability are provided for obtaining the current cardiac output.

[0096] The method for displaying physiological parameters provided in this embodiment obtains the current blood pressure waveform of the target object so as to obtain the cardiac cycle and heart rate of the target object based on the waveform information of the current blood pressure waveform; obtains the vascular environment parameters and heart rate of the target object by analyzing the current blood pressure waveform to provide necessary conditions for calculating the current cardiac output; determines the current cardiac output of the target object based on the vascular environment parameters and heart rate, and provides necessary conditions for displaying the physiological parameters of the target object; and displays the current cardiac output on the target interface, which provides great convenience and reliability for obtaining the current cardiac output. Therefore, the present invention can improve the accuracy of obtaining cardiac output and is convenient for users to read.

[0097] In this embodiment, a method for displaying physiological parameters is provided, which can be used in the above-mentioned medical equipment. Figure 4 is a flow chart of a method for displaying physiological parameters according to an embodiment of the present invention. Figure 4 As shown, the process includes the following steps:

[0098] Step S401, obtaining the current blood pressure waveform of the target object.

[0099] For details, please see Figure 2Step S201 of the illustrated embodiment will not be described in detail here.

[0100] Step S402: Analyze the current blood pressure waveform to obtain the target object's vascular environment parameters and heart rate. Figure 2 Step S202 of the illustrated embodiment will not be described in detail here.

[0101] Step S403, based on the vascular environment parameters and the heart rate, determine the current cardiac output of the target subject. Specifically, the above step S403 includes:

[0102] Step S4031, determining characteristic waveform data in the current blood pressure waveform.

[0103] The characteristic waveform includes waveform data of the rapid ejection period, the slow ejection period and the diastolic period.

[0104] The current blood pressure waveform is analyzed and waveform feature points of the current blood pressure waveform are obtained so as to determine the cardiac cycle of the target object based on the waveform feature points.

[0105] For example, the current blood pressure waveform can be analyzed by a waveform analysis tool to obtain the peak points, trough points and dicrotic points of the current blood pressure waveform, so as to determine the cardiac cycle of the target object based on the corresponding relationship between the peak points and the trough points. At the same time, the systolic pressure, diastolic pressure and mean pressure of the target object can also be obtained based on the waveform feature points of the current blood pressure waveform.

[0106] Step S4032, obtaining the current cardiac output based on the characteristic waveform data, vascular environment parameters and heart rate.

[0107] By determining the target object's cardiac cycle based on the waveform feature points of the current blood pressure waveform, necessary conditions are provided for calculating cardiac output based on the characteristic waveform data, vascular environmental parameters and heart rate during the cardiac cycle.

[0108] In some optional implementations, the target object's cardiac cycle can be determined based on the peak point and trough point of the current blood pressure waveform; then, based on the waveform trends between the peak point, trough point and dicrotic point, the rapid ejection period, slow ejection period and diastolic period in the cardiac cycle can be determined. That is, within one cardiac cycle, the current blood pressure waveform during the period from the start of the cardiac cycle to the peak point is a waveform of the rapid ejection period, the current blood pressure waveform during the period from the peak point to the dicrotic point is a waveform of the slow ejection period, and the current blood pressure waveform during the period from the dicrotic point to the trough point is a waveform of the diastolic period.

[0109] Step S404, display the current cardiac output on the target interface. Figure 2 Step S204 of the illustrated embodiment will not be described in detail here.

[0110] The method for displaying physiological parameters provided in this embodiment first obtains the current blood pressure waveform of the target object, so as to obtain the cardiac cycle and heart rate of the target object based on the waveform information of the current blood pressure waveform; obtains the vascular environment parameters and heart rate of the target object by analyzing the current blood pressure waveform, which provides necessary conditions for calculating the current cardiac output; determines the current cardiac output of the target object based on the vascular environment parameters and heart rate, which provides necessary conditions for displaying the physiological parameters of the target object; and displays the current cardiac output on the target interface, which provides great convenience and reliability for obtaining the current cardiac output. Therefore, the present invention can improve the accuracy of obtaining cardiac output and is convenient for users to read.

[0111] In this embodiment, a method for displaying physiological parameters is provided, which can be used in the above-mentioned medical equipment. Figure 5 is a flow chart of a method for displaying physiological parameters according to an embodiment of the present invention. Figure 5 As shown, the process includes the following steps:

[0112] Step S501, obtaining the current blood pressure waveform of the target object. Figure 2 Step S201 of the illustrated embodiment will not be described in detail here.

[0113] Step S502: Analyze the current blood pressure waveform to obtain the target object's vascular environment parameters and heart rate. Figure 4 Step S402 of the illustrated embodiment will not be described in detail here.

[0114] Step S503, determining the current cardiac output of the target subject based on the vascular environment parameters and the heart rate.

[0115] By determining the current cardiac output of the target object based on the heart rate and the current blood volume, necessary conditions are provided for displaying the physiological parameters of the target object.

[0116] Specifically, the above step S503 includes:

[0117] Step S5031, obtaining feature control parameters.

[0118] By obtaining characteristic control parameters for controlling the current blood volume, the calculated current blood volume can be controlled.

[0119] In some optional implementations, the average actual blood volume of the target object in multiple cardiac cycles can be obtained; based on the difference between the average actual blood volume and the current blood volume, the characteristic control parameter is determined. Optionally, the characteristic control parameter can also be determined based on the difference between the actual blood volume in the previous cardiac cycle and the blood volume calculated in the current cardiac cycle.

[0120] In some optional implementations, the target subject's vital sign information may also be acquired; and characteristic control parameters for controlling the current blood output may be determined based on the vital sign information and / or the current blood pressure waveform.

[0121] Specifically, the target object's age, gender, height, weight and other physical information can be obtained, and the relevant parameters of the current blood pressure wave can be obtained, and the characteristic control parameters for controlling the current blood output can be determined based on the physical information and the relevant parameters. The relevant parameters can include one or more of heart rate, mean pressure, systolic pressure, diastolic pressure, pulse pressure, vascular compliance, vascular resistance, arterial resistance, and cardiac contractility index.

[0122] Step S5032, determining the current cardiac output of the target subject based on the characteristic control parameters, vascular environment parameters and heart rate.

[0123] By adjusting the blood output based on the current blood volume and characteristic control parameters, a more accurate blood output can be obtained, thereby improving the accuracy of the current cardiac output.

[0124] In some optional embodiments, since the time points of slowed ejection and light reflux in the slowed ejection period are difficult to determine accurately, there is usually a certain error. Therefore, this embodiment adjusts the current blood volume through the calculated error, that is, the characteristic control parameter, to further obtain a more accurate adjusted blood discharge volume.

[0125] In this embodiment, the current cardiac output of the target object is determined based on the heart rate and the adjusted blood output, thereby obtaining the current cardiac output with a higher accuracy, providing a data basis for the accurate determination of other relevant physiological parameters.

[0126] In some optional embodiments, when determining the current cardiac output of the target object based on the product of the heart rate and the adjusted blood output, a calibration factor for calibrating the current cardiac output can also be obtained, and the calibration factor can be obtained by the pulmonary thermal dilution method; then, the adjusted blood output is obtained based on the sum of the current blood volume and the characteristic control parameters; finally, the current cardiac output of the target object is determined based on the heart rate, the calibration factor, and the product of the adjusted blood output.

[0127] Step S504: Display the current cardiac output on the target interface. Figure 2 Step S204 of the illustrated embodiment will not be described in detail here.

[0128] The method for displaying physiological parameters provided in this embodiment first obtains the current blood pressure waveform of the target object, so as to obtain the cardiac cycle and heart rate of the target object based on the waveform information of the current blood pressure waveform; obtains the vascular environment parameters and heart rate of the target object by analyzing the current blood pressure waveform, which provides necessary conditions for calculating the current cardiac output; determines the current cardiac output of the target object based on the vascular environment parameters and heart rate, which provides necessary conditions for displaying the physiological parameters of the target object; and displays the current cardiac output on the target interface, which provides great convenience and reliability for obtaining the current cardiac output. Therefore, the present invention can improve the accuracy of obtaining cardiac output and is convenient for users to read.

[0129] like Figure 6 As shown, in some optional implementations, for ease of understanding, the target object can be equivalent to Figure 6 The elastic cavity model 6a in the image can first obtain the current blood pressure wave IBP of the target object; based on the current blood pressure waveform IBP, waveform feature points such as peak point, trough point and dicrotic point are extracted to determine the cardiac cycle and heart rate HR of the target object, and the cardiac cycle includes rapid ejection period, slow ejection period and diastole period; based on the waveform feature points and / or the vital signs information of the target object, such as age, gender, height and weight, the feature control parameter Dp is determined; then based on the current blood pressure waveform IBP, the polar coordinate transformation 6b or the period area is used to calculate the vascular environment parameter RC of the target object; the arterial environment parameter Z can be directly obtained by dividing the difference between the peak point blood pressure value and the trough point blood pressure value in the current blood pressure waveform by the peak point blood pressure value. Based on the current blood pressure waveform IBP, vascular environmental parameter RC and arterial environmental parameter Z, the target object's blood output during the rapid ejection period and the slow ejection period and the basal blood volume during the diastole are determined to obtain the current blood volume; based on the current blood volume and characteristic control parameters, the adjusted blood output 6c is obtained; based on the calibration factor cal for calibrating the current cardiac output, the heart rate HR and the adjusted blood output 6c, the target object's current cardiac output CO is determined.

[0130] Further, for the elastic cavity model 1, the rapid ejection period T0, such as Figure 7 As shown: a period of time when blood is ejected from the ventricle into the artery, the first ejection volume at this time is Q1:

[0131]

[0132] Among them, P represents blood pressure and R represents vascular resistance.

[0133] Slow down the ejection phase T1, such as Figure 8 As shown, the second ejection volume at this time is Q2:

[0134]

[0135] P 0=PI 3 *Z

[0136] Among them, P represents blood pressure, R represents vascular resistance, C represents vascular compliance, and P0 represents blood pressure under vascular compliance.

[0137] Diastolic T2, such as Fig. 9 As shown, the basic health at this time is Q3:

[0138]

[0139] The current cardiac output CO can be expressed as in Is to adjust the blood output Q up .

[0140] The current cardiac output

[0141] Where cal is the calibration factor, HR is the heart rate, Represents feature control parameters.

[0142] In this embodiment, a display device for physiological parameters is also provided, which is used to implement the above-mentioned embodiments and preferred embodiments, and the descriptions that have been made will not be repeated. As used below, the term "module" can implement a combination of software and / or hardware of a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, the implementation of hardware, or a combination of software and hardware, is also possible and conceivable.

[0143] This embodiment provides a display device for physiological parameters, such as Fig.10 As shown, including:

[0144] The data acquisition module 1001 is used to acquire the current blood pressure waveform of the target object.

[0145] The waveform analysis module 1002 is used to analyze the current blood pressure waveform to obtain the vascular environment parameters and heart rate of the target object. The vascular environment parameters are used to characterize vascular compliance and vascular resistance.

[0146] The cardiac output calculation module 1003 is used to determine the current cardiac output of the target subject based on the vascular environment parameters and the heart rate.

[0147] The physiological parameter display module 1004 is used to display the current cardiac output on the target interface.

[0148] In some optional implementations, the waveform analysis module 1002 includes:

[0149] An area acquisition unit, used to acquire the period area of ​​the current blood pressure waveform;

[0150] The parameter acquisition unit is used to obtain the blood vessel environment parameters of the target object based on the periodic area.

[0151] In some optional implementations, the waveform analysis module 1002 further includes:

[0152] The waveform conversion unit is used to convert the current blood pressure waveform into a pulse pressure waveform under the target polar coordinates so that the current blood pressure waveform and the measured blood pressure waveform are in the same coordinate system.

[0153] The waveform analysis unit is used to analyze the pulse pressure waveform to obtain the vascular environment parameters of the target object.

[0154] In some optional embodiments, the waveform analysis unit includes:

[0155] The attenuation information acquisition subunit is used to obtain the attenuation time of the pulse pressure waveform at the target polar coordinates, and the attenuation value of the pulse pressure waveform that continues to attenuate within the attenuation time.

[0156] The environmental parameter acquisition subunit is used to determine the blood vessel environmental parameters based on the attenuation time and the attenuation value.

[0157] In some optional implementations, the blood volume calculation module 1003 includes:

[0158] The feature control parameter acquisition unit is used to acquire the feature control parameters.

[0159] The first cardiac output calculation unit is used to determine the current cardiac output of the target object based on the characteristic control parameters, the vascular environment parameters and the heart rate.

[0160] In some optional implementations, the blood volume calculation module 1003 further includes:

[0161] The characteristic waveform data acquisition unit is used to determine the characteristic waveform data in the current blood pressure waveform, and the characteristic waveform includes waveform data of the rapid ejection period, the slow ejection period and the diastolic period.

[0162] The second cardiac output calculation unit is used to obtain the current cardiac output based on the characteristic waveform data, the vascular environment parameters and the heart rate.

[0163] In some optional implementations, the blood volume calculation module 1003 further includes:

[0164] The calibration factor obtaining unit is used to obtain the calibration factor.

[0165] The initial value acquisition unit is used to obtain the initial value of the current cardiac output based on the vascular environment parameters and the heart rate.

[0166] The third cardiac output calculation unit is used to calibrate the initial value of the current cardiac output based on the calibration factor to obtain the current cardiac output.

[0167] The physiological parameter display device provided in this embodiment obtains the current blood pressure waveform of the target object so as to obtain the cardiac cycle and heart rate of the target object based on the waveform information of the current blood pressure waveform; obtains the vascular environment parameters and heart rate of the target object by analyzing the current blood pressure waveform to provide necessary conditions for calculating the current cardiac output; determines the current cardiac output of the target object based on the vascular environment parameters and heart rate, and provides necessary conditions for displaying the physiological parameters of the target object; and displays the current cardiac output on the target interface, which provides great convenience and reliability for obtaining the current cardiac output. Therefore, the present invention can improve the accuracy of obtaining cardiac output and is convenient for users to read.

[0168] The further functional description of each of the above modules and units is the same as that of the above corresponding embodiments and will not be repeated here.

[0169] The display device of physiological parameters in this embodiment is presented in the form of a functional unit, where the unit refers to an ASIC (Application Specific Integrated Circuit) circuit, a processor and memory that executes one or more software or fixed programs, and / or other devices that can provide the above functions.

[0170] The embodiment of the present invention also provides a medical device having the above Fig.10 A display device for showing physiological parameters.

[0171] See also Fig.11 , Fig.11 is a schematic diagram of the structure of a medical device provided by an optional embodiment of the present invention, such as Fig.11 As shown, the medical device includes: one or more processors 10, a memory 20, and interfaces for connecting various components, including high-speed interfaces and low-speed interfaces. The various components are connected to each other using different buses for communication, and can be installed on a common mainboard or installed in other ways as needed. The processor can process instructions executed in the medical device, including instructions stored in or on the memory to display graphical information of the GUI on an external input / output device (such as a display device coupled to the interface). In some optional embodiments, if necessary, multiple processors and / or multiple buses can be used together with multiple memories and multiple memories. Similarly, multiple medical devices can be connected, and each device provides some necessary operations (for example, as a server array, a group of blade servers, or a multi-processor system). Fig.11 A processor 10 is taken as an example.

[0172] The processor 10 may be a central processing unit, a network processor or a combination thereof. The processor 10 may further include a hardware chip. The hardware chip may be a dedicated integrated circuit, a programmable logic device or a combination thereof. The programmable logic device may be a complex programmable logic device, a field programmable gate array, a general purpose array logic or any combination thereof.

[0173] The memory 20 stores instructions executable by at least one processor 10, so that at least one processor 10 executes the method shown in the above embodiment.

[0174] The memory 20 may include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required for at least one function; the data storage area may store data created according to the use of a medical device displayed on a small program landing page, etc. In addition, the memory 20 may include a high-speed random access memory, and may also include a non-transient memory, such as at least one disk storage device, a flash memory device, or other non-transient solid-state storage device. In some optional embodiments, the memory 20 may optionally include a memory remotely arranged relative to the processor 10, and these remote memories may be connected to the medical device via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a server cluster, a mobile communication network, and a combination thereof.

[0175] The memory 20 may include a volatile memory, such as a random access memory; the memory may also include a non-volatile memory, such as a flash memory, a hard disk or a solid state drive; the memory 20 may also include a combination of the above types of memory.

[0176] The medical device also includes an input device 30 and an output device 40. The processor 10, the memory 20, the input device 30 and the output device 40 may be connected via a bus or other means. Fig.11 The example of connecting through bus is taken in the following.

[0177] The input device 30 can receive input digital or character information, and generate key signal input related to the user settings and function control of the computer device, such as a touch screen, a keypad, a mouse, a track pad, a touch pad, an indicator bar, one or more mouse buttons, a trackball, a joystick, etc. The output device 40 may include a display device, an auxiliary lighting device (e.g., an LED) and a tactile feedback device (e.g., a vibration motor), etc. The above-mentioned display device includes but is not limited to a liquid crystal display, a light emitting diode, a display and a plasma display. In some optional embodiments, the display device can be a touch screen.

[0178] The embodiment of the present invention also provides a computer-readable storage medium. The method according to the embodiment of the present invention can be implemented in hardware, firmware, or can be implemented as a computer code that can be recorded in a storage medium, or can be implemented as a computer code that is originally stored in a remote storage medium or a non-temporary machine-readable storage medium and will be stored in a local storage medium through a network download, so that the method described herein can be stored in such software processing on a storage medium using a general-purpose computer, a dedicated processor, or programmable or dedicated hardware. Among them, the storage medium can be a magnetic disk, an optical disk, a read-only storage memory, a random access memory, a flash memory, a hard disk or a solid-state hard disk, etc.; further, the storage medium can also include a combination of the above types of memories. It can be understood that a computer, a processor, a microprocessor controller, or programmable hardware includes a storage component that can store or receive software or computer code. When the software or computer code is accessed and executed by a computer, a processor, or hardware, the method shown in the above embodiment is implemented.

[0179] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A method for displaying physiological parameters, It is characterized in that The method comprises: Obtaining the current blood pressure waveform of the target subject; Analyzing the current blood pressure waveform to obtain vascular environmental parameters and heart rate of the target subject, wherein the vascular environmental parameters are used to characterize vascular compliance and vascular resistance; determining a current cardiac output of the target subject based on the vascular environment parameter and the heart rate; The current cardiac output is displayed on a target interface.

2. The method according to claim 1, It is characterized in that The determining the current cardiac output of the target subject based on the vascular environment parameter and the heart rate includes: Obtain feature control parameters; Based on the characteristic control parameters, the vascular environment parameters and the heart rate, the current cardiac output of the target subject is determined.

3. The method according to claim 2, It is characterized in that The obtaining of characteristic control parameters comprises: Acquiring vital sign information of the target object; Determine characteristic control parameters based on the vital sign information.

4. The method according to claim 1, It is characterized in that The analyzing the current blood pressure waveform to obtain the vascular environment parameters of the target object includes: Obtaining the period area of ​​the current blood pressure waveform; A blood vessel environment parameter of the target object is obtained based on the periodic area.

5. The method according to claim 1, It is characterized in that The analyzing the current blood pressure waveform to obtain the vascular environment parameters of the target object also includes: Converting the current blood pressure waveform into a pulse pressure waveform in target polar coordinates so that the current blood pressure waveform and the measured blood pressure waveform are in the same coordinate system; The pulse pressure waveform is analyzed to obtain the vascular environment parameters of the target object.

6. The method according to claim 5, It is characterized in that Analyzing the pulse pressure waveform to obtain the vascular environment parameters of the target object includes: Acquire the decay time of the pulse pressure waveform at the target polar coordinates, and the decay value of the pulse pressure waveform that continuously decays within the decay time; The blood vessel environment parameter is determined based on the attenuation time and the attenuation value.

7. The method according to claim 1, It is characterized in that The determining the current cardiac output of the target subject based on the vascular environment parameter and the heart rate includes: Determining characteristic waveform data in the current blood pressure waveform, wherein the characteristic waveform includes waveform data of a rapid ejection period, a slow ejection period, and a diastolic period; The current cardiac output is obtained based on the characteristic waveform data, the vascular environment parameters and the heart rate.

8. The method according to claim 1, It is characterized in that The determining the current cardiac output of the target subject based on the vascular environment parameter and the heart rate further includes: Get the calibration factor; Based on the vascular environment parameter and the heart rate, obtaining an initial value of the current cardiac output; The initial value of the current cardiac output is calibrated based on the calibration factor to obtain the current cardiac output.

9. A display device for physiological parameters, It is characterized in that The device comprises: A data acquisition module, used to acquire the current blood pressure waveform of the target object; A waveform analysis module, used to analyze the current blood pressure waveform to obtain the vascular environment parameters and heart rate of the target object, wherein the vascular environment parameters are used to characterize vascular compliance and vascular resistance; a cardiac output calculation module, configured to determine the current cardiac output of the target subject based on the vascular environment parameter and the heart rate; The physiological parameter display module is used to display the current cardiac output on the target interface.

10. A medical device, It is characterized in that include: A host, configured to execute the method for displaying physiological parameters according to any one of claims 1 to 9; A display is communicatively connected to the host and is used for displaying the current cardiac output on a target interface.

11. A computer-readable storage medium, It is characterized in that The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a computer to execute the method for displaying physiological parameters of any one of claims 1 to 9.

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