Methods, devices, equipment, and storage media for displaying physiological parameters

Abstract

This invention relates to the field of medical device technology, and discloses a method, apparatus, device, and storage medium for displaying physiological parameters, comprising: acquiring the current blood pressure waveform of a target object; analyzing the current blood pressure waveform to determine the cardiac cycle and heart rate of the target object, wherein the cardiac cycle includes a rapid ejection phase, a slow ejection phase, and a diastolic phase; based on the current blood pressure waveform, determining the blood volume of the target object during the rapid ejection phase and the slow ejection phase, as well as the baseline blood volume during the diastolic phase, to obtain the current blood volume; determining the current cardiac output of the target object based on the heart rate and the current blood volume; and displaying the current cardiac output on the target interface. This method can improve the accuracy of cardiac output calculation.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and specifically to a method, apparatus, device, and storage medium for displaying physiological parameters. Background Technology

[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 existing technologies, hemodynamic parameters are generally determined using the cardiac output method. The cardiac output method is a method that continuously but indirectly calculates beat-by-beat cardiac output using various characteristics of arterial pressure waveforms. However, this waveform-based estimation depends not only on stroke volume but also on parameters such as aortic impedance and vascular compliance, which vary non-linearly between individuals. Therefore, it is necessary to establish a suitable hemodynamic model to explain the relationship between these parameters.

[0004] Therefore, current calculations of cardiac output largely depend on the relevance of assumptions, which are based on discarding details of the cardiac cycle, thus introducing significant errors in the calculation of stroke volume and making it difficult to observe. Summary of the Invention

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

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

[0007] Obtain the current blood pressure waveform of the target object;

[0008] The current blood pressure waveform is analyzed 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.

[0009] Based on the vascular environment parameters and the heart rate, the current cardiac output of the target object is determined;

[0010] Display the current cardiac output on the target interface.

[0011] The physiological parameter display method provided in this embodiment of the 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, providing the 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 implementations, determining the current cardiac output of the target object based on the vascular environment parameters and the heart rate includes:

[0013] Obtain feature regulation parameters;

[0014] Based on the feature regulation parameters, the vascular environment parameters, and the heart rate, the current cardiac output of the target object is determined.

[0015] The physiological parameter display method provided in this embodiment of the invention corrects the current blood volume by using feature adjustment parameters, thereby making the obtained current cardiac output more accurate and reliable.

[0016] In some optional implementations, the acquisition of feature modulation parameters includes:

[0017] Obtain the vital signs information of the target object;

[0018] The characteristic regulation parameters are determined based on the vital signs information.

[0019] The physiological parameter display method provided in this embodiment of the 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 the necessary conditions for subsequent adjustment of cardiac output by obtaining the characteristic regulation parameters.

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

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

[0022] The vascular environment parameters of the target object are obtained based on the periodic area.

[0023] The physiological parameter display method provided in this embodiment of the invention determines vascular environment parameters by using the period area of ​​the current blood pressure waveform. This allows the vascular environment parameters to effectively reflect the speed of response under the current cardiac state, improving the rationality of the vascular environment parameters. Furthermore, the determination of the vascular environment parameters provides the necessary conditions for the accurate calculation of the current cardiac output.

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

[0025] The current blood pressure waveform is converted into a pulse pressure waveform in the 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 physiological parameter display method provided in this embodiment of the invention can effectively adjust the current blood pressure waveform through target polar coordinate transformation, solving the problem of differences between different waveforms, and by determining the vascular environment parameters, it provides the necessary conditions for accurate calculation of the current cardiac output.

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

[0029] Obtain the decay time of the pulse compression waveform in the target polar coordinates, and the decay value of the pulse compression waveform during the decay time.

[0030] The vascular environment parameters are determined based on the decay time and the decay value.

[0031] The physiological parameter display method provided in this embodiment of the invention effectively simplifies the determination process of vascular environment parameters by determining vascular environment parameters based on decay time and decay value, and also provides the necessary conditions for accurate calculation of current cardiac output.

[0032] In some optional implementations, determining the current cardiac output of the target object based on the vascular environment parameters and the heart rate includes:

[0033] Determine the characteristic waveform data in the current blood pressure waveform, the characteristic waveform including waveform data of the rapid ejection phase, the slow ejection phase, and the diastolic phase;

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

[0035] The physiological parameter display method provided in this embodiment of the invention calculates the current blood volume using characteristic waveform data, vascular environment parameters, and heart rate, thereby making the obtained current cardiac output more accurate and reliable.

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

[0037] Obtain the calibration factor;

[0038] Based on the vascular environment parameters and the heart rate, the initial value of the current cardiac output is obtained;

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

[0040] The physiological parameter display method provided in this embodiment of the invention further corrects the current cardiac output by using a calibration factor, thereby further improving the accuracy of the current cardiac output calculation.

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

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

[0043] The waveform analysis module 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.

[0044] The cardiac output calculation module is used to determine the current cardiac output of the target object based on the vascular environment parameters and the heart rate;

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

[0046] Thirdly, the present invention provides a medical device comprising: a host computer for performing a method for displaying physiological parameters according to the first aspect or any corresponding embodiment thereof; and a display computer, communicatively connected to the host computer, for displaying the current cardiac output on a target interface.

[0047] Fourthly, the present invention provides a computer-readable storage medium storing computer instructions for causing a computer to perform the method for displaying physiological parameters as described in the first aspect or any corresponding embodiment thereof.

[0048] It should be noted that for the corresponding beneficial effects of the physiological parameter display device, medical device, and computer-readable storage medium provided in the embodiments of the present invention, please refer to the description of the corresponding beneficial effects of the physiological parameter display method above, which will not be repeated here. Attached Figure Description

[0049] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

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

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

[0052] Figure 3 This is a schematic diagram of pulse compression waveform attenuation in polar coordinates;

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

[0054] Figure 5 This is a flowchart illustrating a method for displaying another physiological parameter according to an embodiment of the present invention;

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

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

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

[0058] Figure 9 This is another schematic diagram of a model used in the calculation of physiological parameters;

[0059] Figure 10 This is a structural block diagram of a physiological parameter display device according to an embodiment of the present invention;

[0060] Figure 11 This is a schematic diagram of the hardware structure of a medical device according to an embodiment of the present invention. Detailed Implementation

[0061] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0062] The terms "first" and "second" in the specification, claims, and accompanying drawings of this invention are used to distinguish different objects, not to describe a specific order. Furthermore, the term "comprising" and any variations thereof are intended to cover non-exclusive protection. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or apparatuses. The term "multiple" in this invention can mean at least two, for example, two, three, or more, and the embodiments of this invention are not limited thereto.

[0063] Please see Figure 1 , Figure 1 This is a schematic diagram of an application scenario provided by an embodiment of the present invention. The medical device 100 is connected to a blood pressure measuring device. The blood pressure measuring device measures the blood pressure of the target object to obtain the current blood pressure waveform. Then, the current blood pressure waveform is transmitted to the medical device 100. Alternatively, the medical device 100 integrates a blood pressure measuring function to measure the blood pressure of the target object.

[0064] Medical device 100 can either display test results independently or upload them to central station 200, where the results for each target object are displayed. The connection between central station 200 and each medical device 100 can be via 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. The aforementioned network may include, but is not limited to, a wireless network or a wired network. The wireless network includes Bluetooth, Wi-Fi (Wireless Fidelity), and other networks enabling wireless communication. The aforementioned wired network may include, but is not limited to, a wide area network (WAN), a metropolitan area network (MAN), and a server cluster. The aforementioned central station 200 may include, but is not limited to, any hardware device capable of computing.

[0066] Furthermore, in this embodiment, the method for displaying the physiological parameters described above can also be applied to, but is not limited to, a powerful independent processing device without the need for data interaction. For example, the processing device can be, but is not limited to, a powerful terminal device; that is, the various operations in the method for displaying the physiological parameters can be integrated into a single independent processing device. The above is merely an example, and no limitation is made in this embodiment.

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

[0068] This embodiment provides a method for displaying physiological parameters, which can be used in the aforementioned medical device. Figure 2 This is a flowchart of a method for displaying physiological parameters according to an embodiment of the present invention, such as... Figure 2 As shown, the process includes the following steps:

[0069] Step S201: Obtain the current blood pressure waveform of the target object.

[0070] By acquiring the target object's current blood pressure waveform, the target object's cardiac cycle and heart rate can be obtained based on the waveform information of the current blood pressure waveform.

[0071] In some alternative implementations, the target object can be measured using a blood pressure measuring device to obtain the target object's current blood pressure waveform. The blood pressure measuring device can be desktop or portable; there is no limitation on this.

[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 of the target object and the heart rate provide the necessary conditions for calculating the current cardiac output.

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

[0075] Specifically, based on the current blood pressure waveform, the ejection volume during the rapid and slow ejection phases, as well as the baseline blood volume during diastole, can be determined to obtain the current blood volume. By determining the ejection volume during the rapid and slow ejection phases and the baseline blood volume during diastole based on the current blood pressure waveform, the current blood volume can be obtained based on the ejection volume and baseline blood volume, facilitating the calculation of the target subject's current cardiac output.

[0076] In some optional implementations, the first ejection volume during the rapid ejection phase, the second ejection volume during the slowed ejection phase, and the baseline blood volume during diastole can be obtained first. Then, the ejected blood volume is calculated based on the first and second ejection volumes. The current blood volume of the target object is then calculated based on the ejected blood volume and the baseline blood volume. Obtaining the first ejection volume during the rapid ejection phase, the second ejection volume during the slowed ejection phase, and the baseline blood volume during diastole provides the necessary conditions for calculating the current ejected blood volume of the target object. Calculating the ejected blood volume based on the first and second ejection volumes provides the necessary conditions for calculating the total ejected blood volume over the entire cardiac cycle. It can be understood that the ejected blood volume is the ejection volume during the first ejection phase plus the blood volume ejected during the slowed ejection phase. The current blood volume of the target object is obtained by summing the ejected blood volume and the baseline blood volume, providing the necessary conditions for calculating the current cardiac output of the target object.

[0077] In some optional implementations, before obtaining the first ejection volume during the rapid ejection phase, the second ejection volume during the slowed ejection phase, and the baseline blood volume during diastole, the current blood pressure waveform is first converted into a pulse pressure waveform in polar coordinates based on the waveform information of the current blood pressure waveform during the rapid ejection phase. Then, the decay time of the pulse pressure waveform in polar coordinates and the decay value of the pulse pressure waveform during the decay time are obtained. Finally, vascular environmental parameters are determined based on the decay time and decay value. Vascular environmental parameters are used to characterize vascular compliance and vascular resistance.

[0078] In practice, because vascular environment parameters can significantly influence the cardiac cycle response speed and blood output, and the current understanding of using pulse pressure to measure cardiac cycle response speed is one-sided, it can lead to significant errors. Therefore, multiple blood pressure waveforms with different heart rates and blood pressure conditions can be acquired, and all blood pressure waveforms can be converted to a comparable polar coordinate system, i.e., the target polar coordinate system, to obtain pulse pressure waveforms at different angles. During the conversion process, the relative pulse pressure magnitude can be adjusted. This target polar coordinate system is obtained by polar coordinate conversion of multiple measured blood pressure waveforms. For example, the parameters of the template pulse pressure waveform can be determined from the multiple converted pulse pressure waveforms (such as pulse pressure waveforms at angles of ∮1, ∮2, and ∮3), for example, the pulse pressure waveform at angle ∮2. Then, using the waveform parameters of the template pulse pressure waveform, such as the starting coordinates, the current blood pressure waveform is converted into a pulse pressure waveform. Next, based on the decay time of the pulse pressure waveform in polar coordinates and the decay value 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 PP is the decay time, ln(PP) is the pulse pressure, and ln(PP) is the decay value of the pulse pressure waveform during the decay time.

[0079] Understandably, this invention uses the vascular environment parameter RC obtained by waveform calculation after polar coordinate system transformation and adjustment. By analyzing the waveform characteristics of the current blood pressure waveform and combining it with vital sign information, the hemodynamic parameters in the physiological parameters are calculated.

[0080] In some optional implementations, when obtaining the first ejection volume during the rapid ejection phase, the second ejection volume during the slowed ejection phase, and the baseline ejection volume during diastole, the vascular environment parameters and arterial environment parameters of the target object are first obtained, with the arterial environment parameters used to characterize arterial resistance; then, based on the waveform information of the diastolic phase on the current blood pressure waveform and the vascular environment parameters, the baseline ejection volume is determined; based on the baseline ejection volume, the waveform information of the rapid ejection phase on the current blood pressure waveform, and the vascular environment parameters, the first ejection volume is determined; and based on the baseline ejection volume, the waveform information of the slowed ejection phase on the current blood pressure waveform, the vascular environment parameters, and the arterial environment parameters, the second ejection volume is determined.

[0081] Specifically, when determining the baseline blood volume based on the waveform information of the current blood pressure waveform during diastole and vascular environment parameters, the third position information of the current blood pressure waveform during diastole is first obtained; then, based on the waveform information of the current blood pressure waveform under the third position information and vascular environment parameters, the third blood flow of the target object during diastole is determined, such as obtaining the third blood flow of the target object at each moment during diastole based on the ratio of the blood pressure value to the vascular environment parameters at each moment in the current blood pressure waveform; finally, the baseline blood volume is determined based on the third blood flow during diastole.

[0082] Specifically, when determining the second ejection volume based on the baseline blood volume, the waveform information of the rapid ejection phase on the current blood pressure waveform, and vascular environment parameters, the first position information of the rapid ejection phase on the current blood pressure waveform is first obtained; then, based on the waveform information of the current blood pressure waveform under the first position information and the vascular environment parameters, the first blood flow of the target object during the rapid ejection phase is determined, such as by multiplying the differential of the blood pressure value at each moment in the current blood pressure waveform with the vascular environment parameters to obtain the first blood flow of the target object at each moment during the rapid ejection phase; finally, the first ejection volume is determined based on the baseline blood volume and the first blood flow during the rapid ejection phase.

[0083] Specifically, when determining the second ejection volume based on baseline blood volume, waveform information of the slow ejection phase on the current blood pressure waveform, vascular environment parameters, and arterial environment parameters, the process first acquires the second position information of the slow ejection phase on the current blood pressure waveform. Then, based on the waveform information of the current blood pressure waveform at the second position information, arterial environment parameters, and vascular environment parameters, the second blood flow rate of the target object during the slow ejection phase is determined. Finally, based on the baseline blood volume and the second blood flow rate during the slow ejection phase, the second ejection volume is determined. It is understandable that the slow ejection phase is a complex process; it is not simply a process of slowing ejection, but rather a process that transitions from slowing ejection to mild regurgitation until the aortic valve closes.

[0084] Arterial resistance can be obtained directly by dividing the difference between the blood pressure value at the peak and the blood pressure value at the trough of the current blood pressure waveform by the blood pressure value at the peak, or it can be measured by an ultrasound sensor.

[0085] Furthermore, when acquiring the vascular environment parameters of the target object, the period area of ​​the current blood pressure waveform can be obtained; the vascular environment parameters of the target object are then derived based on the period area. Alternatively, the current blood pressure waveform can be converted into a pulse pressure waveform in 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 then analyzed to obtain the vascular environment parameters of the target object.

[0086] Specifically, the current blood pressure waveform is first converted into a pulse pressure waveform in polar coordinates; the decay time of the pulse pressure waveform in polar coordinates is obtained, as well as the decay value of the pulse pressure waveform during the decay time; based on the decay time and decay value, vascular environment parameters are determined, i.e., the vascular environment parameters of the target object are calculated using the polar coordinate transformation method. Optionally, vascular environment parameters can also be determined based on the area of ​​the current blood pressure waveform under its own waveform contour, i.e., the vascular environment parameters of the target object are calculated using the periodic area method. RC represents vascular environment parameters, and P represents the current blood pressure waveform.

[0087] Step S203: Determine the current cardiac output of the target object based on vascular environment parameters and heart rate.

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

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

[0090] First, the characteristic regulation parameters for regulating the current blood volume are obtained, which are based on the current blood pressure waveform. Then, the adjusted blood output is obtained based on the current blood volume and the characteristic regulation 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 alternative implementations, a calibration factor for calibrating the current cardiac output can be obtained; then, an adjusted cardiac output can be obtained based on the current blood volume and characteristic regulation parameters; finally, the current cardiac output of the target object can be determined based on the heart rate, calibration factor, and adjusted cardiac output.

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

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

[0094] Step S204: Display the current cardiac output on the target interface.

[0095] By displaying the current displacement on the target interface, the acquisition of the current displacement is greatly facilitated and made more reliable.

[0096] The physiological parameter display method provided in this embodiment acquires the current blood pressure waveform of the target object, so as to obtain the target object's cardiac cycle and heart rate based on the waveform information of the current blood pressure waveform; by analyzing the current blood pressure waveform, the vascular environment parameters of the target object are obtained, and the heart rate provides the necessary conditions for calculating the current cardiac output; by determining the target object's current cardiac output based on the vascular environment parameters and heart rate, the necessary conditions are provided for displaying the target object's physiological parameters; by displaying the current cardiac output on the target interface, the acquisition of the current cardiac output is greatly facilitated and reliable. Therefore, this invention can improve the accuracy of cardiac output acquisition and is easy for users to read.

[0097] This embodiment provides a method for displaying physiological parameters, which can be used in the aforementioned medical device. Figure 4 This is a flowchart of a method for displaying physiological parameters according to an embodiment of the present invention, such as... Figure 4 As shown, the process includes the following steps:

[0098] Step S401: Obtain the current blood pressure waveform of the target object.

[0099] Please see details Figure 2Step S201 of the illustrated embodiment will not be described again here.

[0100] Step S402: Analyze the current blood pressure waveform to obtain the vascular environment parameters and heart rate of the target subject. For details, please refer to [link to relevant documentation]. Figure 2 Step S202 of the illustrated embodiment will not be described again here.

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

[0102] Step S4031: Determine the characteristic waveform data in the current blood pressure waveform.

[0103] The characteristic waveforms include waveform data from the rapid ejection phase, the slow ejection phase, and the diastolic phase.

[0104] By analyzing the current blood pressure waveform and obtaining its waveform feature points, the cardiac cycle of the target object can be determined based on these waveform feature points.

[0105] For example, waveform analysis tools can be used to analyze the current blood pressure waveform to obtain its peaks, troughs, and dicrotic points, allowing for the determination of the target individual's cardiac cycle based on the correspondence between peaks and troughs. Furthermore, the target individual's systolic blood pressure, diastolic blood pressure, and mean blood pressure can be obtained based on the waveform characteristic points of the current blood pressure waveform.

[0106] Step S4032: Based on the characteristic waveform data, vascular environment parameters, and heart rate, the current cardiac output is obtained.

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

[0108] In some optional implementations, the cardiac cycle of the target subject can be determined based on the peak and trough points of the current blood pressure waveform; then, based on the waveform trend between the peak, trough, and dicrotic point, the rapid ejection phase, slow ejection phase, and diastolic phase of the cardiac cycle can be determined. That is, within a cardiac cycle, the current blood pressure waveform from the beginning of the cardiac cycle to the peak is the rapid ejection phase waveform, the current blood pressure waveform from the peak to the dicrotic point is the slow ejection phase waveform, and the current blood pressure waveform from the dicrotic point to the trough is the diastolic phase waveform.

[0109] Step S404: Display the current cardiac output on the target interface. For details, please refer to [link to relevant documentation]. Figure 2 Step S204 of the illustrated embodiment will not be described again here.

[0110] The physiological parameter display method provided in this embodiment first acquires the current blood pressure waveform of the target object to obtain the target object's cardiac cycle and heart rate based on the waveform information. Analyzing the current blood pressure waveform provides the necessary conditions for calculating the target object's vascular environment parameters and heart rate. Based on the vascular environment parameters and heart rate, the target object's current cardiac output is determined, providing the necessary conditions for displaying the target object's physiological parameters. Displaying the current cardiac output on the target interface greatly enhances the convenience and reliability of obtaining the current cardiac output. Therefore, this invention can improve the accuracy of cardiac output acquisition and facilitate user reading.

[0111] This embodiment provides a method for displaying physiological parameters, which can be used in the aforementioned medical device. Figure 5 This is a flowchart of a method for displaying physiological parameters according to an embodiment of the present invention, such as... Figure 5 As shown, the process includes the following steps:

[0112] Step S501: Obtain the current blood pressure waveform of the target object. For details, please refer to [link to relevant documentation]. Figure 2 Step S201 of the illustrated embodiment will not be described again here.

[0113] Step S502: Analyze the current blood pressure waveform to obtain the vascular environment parameters and heart rate of the target subject. For details, please refer to [link to relevant documentation]. Figure 4 Step S402 of the illustrated embodiment will not be described again here.

[0114] Step S503: Determine the current cardiac output of the target object based on vascular environment parameters and heart rate.

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

[0116] Specifically, step S503 above includes:

[0117] Step S5031: Obtain feature control parameters.

[0118] By acquiring characteristic control parameters that regulate the current blood volume, the calculated current blood volume can be regulated.

[0119] In some optional implementations, the average actual blood volume of the target object over multiple cardiac cycles can be obtained; the characteristic regulation parameters are determined based on the difference between the average actual blood volume and the current blood volume. Optionally, the characteristic regulation parameters 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 alternative implementations, the vital signs of the target object can also be acquired; based on the vital signs and / or the current blood pressure waveform, characteristic control parameters for regulating the current blood output can be determined.

[0121] Specifically, it can acquire vital signs information such as age, gender, height, and weight of the target subject, as well as relevant parameters of the current blood pressure wave. Based on the vital signs information and relevant parameters, characteristic control parameters for regulating the current blood output can be determined. Relevant parameters may include one or more of the following: heart rate, mean blood pressure, systolic blood pressure, diastolic blood pressure, pulse pressure, vascular compliance, vascular resistance, arterial resistance, and cardiac systolic index.

[0122] Step S5032: Determine the current cardiac output of the target object based on the characteristic regulation parameters, vascular environment parameters, and heart rate.

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

[0124] In some alternative implementations, since the timing of the mid-slow ejection and slight reflux during the slowed ejection phase is difficult to determine precisely, there is usually a certain error. Therefore, this embodiment adjusts the current blood volume by calculating the error, i.e., the characteristic control parameter, thereby obtaining a more accurate adjustment of the ejection volume.

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

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

[0127] Step S504: Display the current cardiac output on the target interface. For details, please refer to [link to relevant documentation]. Figure 2 Step S204 of the illustrated embodiment will not be described again here.

[0128] The physiological parameter display method provided in this embodiment first acquires the current blood pressure waveform of the target object to obtain the target object's cardiac cycle and heart rate based on the waveform information. Analyzing the current blood pressure waveform provides the necessary conditions for calculating the target object's vascular environment parameters and heart rate. Based on the vascular environment parameters and heart rate, the target object's current cardiac output is determined, providing the necessary conditions for displaying the target object's physiological parameters. Displaying the current cardiac output on the target interface greatly enhances the convenience and reliability of obtaining the current cardiac output. Therefore, this invention can improve the accuracy of cardiac output acquisition and facilitate user reading.

[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 model can first obtain the current blood pressure waveform (IBP) of the target subject; based on the current blood pressure waveform (IBP), waveform feature points such as peak points, trough points, and dicrotic points are extracted to determine the cardiac cycle and heart rate (HR) of the target subject. The cardiac cycle includes the rapid ejection phase, the slow ejection phase, and the diastolic phase; based on the waveform feature points and / or the target subject's vital signs such as age, gender, height, and weight, the characteristic regulation parameter Dp is determined; then, based on the current blood pressure waveform (IBP), the vascular environment parameter RC of the target subject is calculated using polar coordinate transformation 6b or the period area; the arterial environment parameter Z can be obtained directly by dividing the difference between the blood pressure value at the peak point and the blood pressure value at the trough point in the current blood pressure waveform by the blood pressure value at the peak point. Based on the current blood pressure waveform IBP, vascular environment parameter RC, and arterial environment parameter Z, the ejection volume of the target subject during the rapid ejection phase and the slow ejection phase, as well as the baseline blood volume during diastole, are determined to obtain the current blood volume. Based on the current blood volume and characteristic regulation parameters, the adjusted ejection volume 6c is obtained. Based on the calibration factor cal used to calibrate the current cardiac output, heart rate HR, and adjusted ejection volume 6c, the current cardiac output CO of the target subject is determined.

[0130] Furthermore, for elastic cavity model 1, the rapid ejaculation period T0, such as Figure 7 As shown: This represents a period during which blood is ejected from the ventricle into the artery; the initial ejection volume at this time is Q1.

[0131]

[0132] Where P represents blood pressure and R represents vascular resistance.

[0133] Slow down the T1 of the ejection phase, such as Figure 8 As shown, the second burst of health at this point is Q2:

[0134]

[0135] P0 = P - I3 * Z

[0136] Where 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 Figure 9 As shown, the base health at this point is Q3:

[0138]

[0139] The current cardiac output CO can be expressed as in Is it adjusting the amount of blood lost? (Q) up .

[0140] Current cardiac output

[0141] Where cal represents the calibration factor and HR represents heart rate. This represents the characteristic control parameter.

[0142] This embodiment also provides a physiological parameter display device for implementing the above embodiments and preferred embodiments; details already described will not be repeated. As used below, the term "module" can refer to a combination of software and / or hardware that performs a predetermined function. Although the device described in the following embodiments is preferably implemented in software, hardware implementation, or a combination of software and hardware, is also possible and contemplated.

[0143] This embodiment provides a device for displaying physiological parameters, such as... Figure 10 As shown, it includes:

[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 a target object based on vascular environment parameters and heart rate.

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

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

[0149] 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 vascular 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 in 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 pulse pressure waveforms to obtain vascular environment parameters of the target object.

[0154] In some alternative implementations, the waveform analysis unit includes:

[0155] The attenuation information acquisition subunit is used to acquire the attenuation time of the pulse compression waveform in the target polar coordinates, as well as the attenuation value of the pulse compression waveform during the attenuation time.

[0156] The environmental parameter acquisition subunit is used to determine vascular environmental parameters based on decay time and decay value.

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

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

[0159] The first cardiac output calculation unit is used to determine the current cardiac output of the target object based on characteristic regulation parameters, vascular environment parameters, and 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. The characteristic waveforms include waveform data of the rapid ejection phase, the slow ejection phase, and the diastolic phase.

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

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

[0164] The calibration factor acquisition unit is used to acquire the calibration factor.

[0165] The initial value acquisition unit is used to obtain the initial value of the current cardiac output based on vascular environment parameters and 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 acquires the current blood pressure waveform of the target object, so as to obtain the target object's cardiac cycle and heart rate based on the waveform information of the current blood pressure waveform; by analyzing the current blood pressure waveform, it obtains the target object's vascular environment parameters and provides the necessary conditions for calculating the current cardiac output based on the heart rate; by determining the target object's current cardiac output based on the vascular environment parameters and heart rate, it provides the necessary conditions for displaying the target object's physiological parameters; by displaying the current cardiac output on the target interface, it provides great convenience and reliability for obtaining the current cardiac output. Therefore, this invention can improve the accuracy of cardiac output acquisition and is easy for users to read.

[0168] Further functional descriptions of the above modules and units are the same as those in the corresponding embodiments described above, and will not be repeated here.

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

[0170] This invention also provides a medical device having the above-described features. Figure 10 A device for displaying physiological parameters.

[0171] Please see Figure 11 , Figure 11 This is a schematic diagram of the structure of a medical device provided in an optional embodiment of the present invention, such as... Figure 11 As shown, the medical device includes one or more processors 10, memory 20, and interfaces for connecting the components, including high-speed interfaces and low-speed interfaces. The components communicate with each other via different buses and can be mounted on a common motherboard or otherwise as required. The processors can process instructions executed within the medical device, including instructions stored in or on memory to display graphical information of a GUI on external input / output devices (such as display devices coupled to the interfaces). In some alternative implementations, multiple processors and / or multiple buses can be used with multiple memories and multiple memory modules, if desired. Similarly, multiple medical devices can be connected, each providing some of the necessary operations (e.g., as a server array, a set of blade servers, or a multiprocessor system). Figure 11 Take a processor 10 as an example.

[0172] Processor 10 may be a central processing unit, a network processor, or a combination thereof. Processor 10 may further include a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD), or a combination thereof. The programmable logic device may be a complex programmable logic device (CAMP), a field-programmable gate array (FPGA), a general-purpose array logic (GDA), or any combination thereof.

[0173] The memory 20 stores instructions executable by at least one processor 10 to cause at least one processor 10 to perform the method shown in the above embodiments.

[0174] The memory 20 may include a program storage area and a data storage area. The program storage area may store the operating system and applications required for at least one function; the data storage area may store data created based on the use of the medical device as displayed on a mini-program landing page. Furthermore, the memory 20 may include high-speed random access memory and non-transient memory, such as at least one disk storage device, flash memory device, or other non-transient solid-state storage device. In some alternative embodiments, the memory 20 may optionally include memory remotely located relative to the processor 10, which can be connected to the medical device via a network. Examples of such networks include, but are not limited to, the Internet, corporate intranets, server clusters, mobile communication networks, and combinations thereof.

[0175] The memory 20 may include volatile memory, such as random access memory; the memory may also include non-volatile memory, such as flash memory, hard disk or 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, memory 20, input device 30, and output device 40 can be connected via a bus or other means. Figure 11 Taking the example of a connection between China and Israel via a bus.

[0177] Input device 30 can receive input numerical or character information, and generate key signal inputs related to user settings and function control of the computer device, such as a touchscreen, keypad, mouse, trackpad, touchpad, joystick, one or more mouse buttons, trackball, joystick, etc. Output device 40 may include display devices, auxiliary lighting devices (e.g., LEDs), and haptic feedback devices (e.g., vibration motors). The aforementioned display devices include, but are not limited to, liquid crystal displays, light-emitting diodes, displays, and plasma displays. In some alternative embodiments, the display device may be a touchscreen.

[0178] This invention also provides a computer-readable storage medium. The methods described above according to embodiments of the invention can be implemented in hardware or firmware, or implemented as computer code that can be recorded on a storage medium, or implemented as computer code downloaded via a network and originally stored on a remote storage medium or a non-transitory machine-readable storage medium and then stored on a local storage medium. Thus, the methods described herein can be processed by software stored on a storage medium using a general-purpose computer, a dedicated processor, or programmable or dedicated hardware. The storage medium can be a magnetic disk, optical disk, read-only memory, random access memory, flash memory, hard disk, or solid-state drive, etc.; further, the storage medium can also include combinations of the above types of memory. It is understood that computers, processors, microprocessor controllers, or programmable hardware include storage components capable of storing or receiving software or computer code, which, when accessed and executed by the computer, processor, or hardware, implements the methods shown in the above embodiments.

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

Claims

1. A method for displaying physiological parameters, characterized in that, The method includes: Obtain the current blood pressure waveform of the target object; Analyzing the current blood pressure waveform yields the vascular environment parameters and heart rate of the target object. These vascular environment parameters characterize vascular compliance and vascular resistance. Obtaining these parameters 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; and analyzing the pulse pressure waveform to obtain the vascular environment parameters of the target object. ,in, For vascular environment parameters, For decay time, PP Pulse pressure, The decay value is the continuous decay of the pulse compression waveform during the decay time; Based on the vascular environment parameters and the heart rate, the current cardiac output of the target object is determined; Display the current cardiac output on the target interface; The calculation model for the current cardiac output is as follows: in, Indicates the current cardiac output. Indicates the calibration factor. Indicates heart rate, The parameters represent characteristic control parameters, where P represents blood pressure, R represents vascular resistance, C represents vascular compliance, and P0 represents blood pressure under vascular compliance.

2. The method according to claim 1, characterized in that, Determining the current cardiac output of the target object based on the vascular environment parameters and the heart rate includes: Obtain feature regulation parameters; Based on the feature regulation parameters, the vascular environment parameters, and the heart rate, the current cardiac output of the target object is determined.

3. The method according to claim 2, characterized in that, The acquired feature regulation parameters include: Obtain the vital signs information of the target object; The characteristic regulation parameters are determined based on the vital signs information.

4. The method according to claim 1, characterized in that, The analysis of the current blood pressure waveform to obtain the vascular environment parameters of the target object includes: Obtain the area of ​​the period of the current blood pressure waveform; The vascular environment parameters of the target object are obtained based on the periodic area.

5. The method according to claim 1, characterized in that, Determining the current cardiac output of the target object based on the vascular environment parameters and the heart rate includes: Determine the characteristic waveform data in the current blood pressure waveform, the characteristic waveform including waveform data of the rapid ejection phase, the slow ejection phase, and the diastolic phase; The current cardiac output is obtained based on the characteristic waveform data, the vascular environment parameters, and the heart rate.

6. The method according to claim 1, characterized in that, The step of determining the current cardiac output of the target object based on the vascular environment parameters and the heart rate further includes: Obtain the calibration factor; Based on the vascular environment parameters and the heart rate, the initial value of the current cardiac output is obtained; The initial value of the current cardiac output is calibrated based on the calibration factor to obtain the current cardiac output.

7. A device for displaying physiological parameters, characterized in that, The device includes: The data acquisition module is used to acquire the current blood pressure waveform of the target object; The waveform analysis module 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. Obtaining the vascular environment parameters includes: converting the current blood pressure waveform into a pulse pressure waveform in the target polar coordinates so that the current blood pressure waveform and the measured blood pressure waveform are in the same coordinate system; and analyzing the pulse pressure waveform to obtain the vascular environment parameters of the target object. ,in, For vascular environment parameters, For decay time, PP Pulse pressure, The decay value is the continuous decay of the pulse compression waveform during the decay time; The cardiac output calculation module is used to determine the current cardiac output of the target object based on the vascular environment parameters and the heart rate. The calculation model for the current cardiac output is as follows: in, Indicates the current cardiac output. Indicates the calibration factor. Indicates heart rate, The parameters represent characteristic control parameters, where P represents blood pressure, R represents vascular resistance, C represents vascular compliance, and P0 represents blood pressure under vascular compliance. The physiological parameter display module is used to display the current cardiac output on the target interface.

8. A medical device, characterized in that, include: A host computer for performing the method for displaying physiological parameters as described in any one of claims 1 to 6; A display, communicatively connected to the host, is used to display the current cardiac output on a target interface.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions for causing the computer to perform the method for displaying physiological parameters according to any one of claims 1 to 6.

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