CN112155531A - Method and system for obtaining diastolic pressure and systolic pressure extreme points according to invasive blood pressure - Google Patents
Method and system for obtaining diastolic pressure and systolic pressure extreme points according to invasive blood pressure Download PDFInfo
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Abstract
The application provides a method and a system for acquiring diastolic pressure and systolic pressure extreme points according to invasive blood pressure, comprising the following steps: reading the invasive blood pressure of the coronary artery in real time; obtaining the maximum value and the minimum value of invasive blood pressure as an initial diastolic maximum value point and an initial systolic minimum value point respectively; respectively acquiring a diastolic pressure threshold value and a systolic pressure threshold value according to the diastolic pressure initial maximum value point and the systolic pressure initial minimum value point; and respectively comparing the maximum value point and the minimum value point with a threshold value, eliminating the diastolic pressure value and the systolic pressure value which do not meet the conditions, and updating to obtain the diastolic pressure extreme point and the systolic pressure extreme point. The method comprises the steps of obtaining diastolic pressure, an initial extreme point of systolic pressure, and thresholds of the diastolic pressure and the systolic pressure preliminarily; the extreme points are compared with the threshold value, the extreme points which do not meet the conditions are removed, the extreme points of the diastolic pressure and the systolic pressure are updated, the accuracy of the extreme points of the diastolic pressure and the systolic pressure is improved, and the accuracy is improved for the calculation of the later coronary artery blood vessel evaluation parameters.
Description
Technical Field
The invention relates to the technical field of coronary artery medicine, in particular to a method and a system for acquiring diastolic pressure and systolic pressure extreme points according to invasive blood pressure, a coronary artery blood vessel evaluation parameter and a storage medium.
Background
Blood pressure monitoring methods are classified into invasive and non-invasive. Invasive monitoring is clinically used as a gold standard because it is more accurate and reliable. Invasive blood pressure is known as direct measurement and uses a pressure transducer to obtain the instantaneous pressure by establishing a pressure transmission channel with the measurement site through physiological saline.
The coronary artery blood vessel evaluation parameters such as the blood flow reserve fraction mainly adopt systolic pressure, diastolic pressure and average pressure, but instantaneous blood pressure measured by a pressure sensor cannot accurately judge a systolic minimum value point and a diastolic maximum value point, so that the coronary artery blood vessel evaluation parameters are not accurately calculated.
Disclosure of Invention
The invention provides a method and a system for acquiring diastolic pressure and systolic pressure extreme points according to invasive blood pressure, which aim to solve the problem that in the prior art, instantaneous blood pressure measured by a pressure sensor cannot accurately judge a systolic pressure minimum point and a diastolic pressure maximum point, so that the calculation of coronary artery blood vessel evaluation parameters is inaccurate.
In order to achieve the above object, the present invention provides a method for obtaining a diastolic extreme point and a systolic extreme point from a real-time invasive blood pressure, comprising:
reading the invasive blood pressure of the coronary artery in real time;
obtaining the maximum value of invasive blood pressure as the initial maximum value point of diastolic pressure;
obtaining the minimum value of invasive blood pressure as the initial minimum value point of systolic pressure;
respectively acquiring a diastolic pressure threshold value and a systolic pressure threshold value according to the diastolic pressure initial maximum value point and the systolic pressure initial minimum value point;
comparing the diastolic pressure initial maximum point with the diastolic pressure threshold, eliminating the diastolic pressure initial maximum point which does not meet the conditions, and obtaining a diastolic pressure extreme point after updating;
and comparing the initial minimum value point of the systolic pressure with the systolic pressure threshold value, eliminating the initial minimum value point of the systolic pressure which does not meet the conditions, and updating to obtain the extreme value point of the systolic pressure.
Optionally, in the above method for obtaining a diastolic extreme point and a systolic extreme point from a real-time invasive blood pressure, the method for obtaining a maximum value of the invasive blood pressure as an initial diastolic maximum point includes:
if P ist0＞Pt1＞Pt2Then t is1Temporal invasive blood pressure Pt1On the descending trend line of the invasive blood pressure waveform, comparing the invasive blood pressure values on all the descending trend lines meeting the conditions to obtain the maximum value of the invasive blood pressure as the initial maximum value point of the diastolic pressure; wherein, Pt1Represents t1Invasive blood pressure at time Pt0Represents the sum of t1Adjacent previous time t0Invasive blood pressure of (P)t2Represents the sum of t1Adjacent later time t2The invasive blood pressure of (1).
Optionally, in the above method for obtaining a diastolic extreme point and a systolic extreme point from a real-time invasive blood pressure, the method for obtaining a minimum value of the invasive blood pressure as a systolic initial minimum point includes:
if P ist0＜Pt1＜Pt2Then t is1Temporal invasive blood pressure Pt1On the ascending trend line of the invasive blood pressure waveform, comparing the invasive blood pressure values on all the ascending trend lines meeting the conditions to obtain the minimum value of the invasive blood pressure as the initial minimum value point of the systolic pressure; wherein, Pt1Represents t1Invasive blood pressure at time Pt0Represents the sum of t1Adjacent previous time t0Invasive blood pressure of (P)t2Represents the sum of t1Adjacent later time t2The invasive blood pressure of (1).
Optionally, in the above method for obtaining a diastolic extreme point and a systolic extreme point according to a real-time invasive blood pressure, the method for obtaining a diastolic threshold value and a systolic threshold value according to the diastolic initial extreme point and the systolic initial extreme point respectively includes:
Prelaxation of＝a Pi+b Pj；
PShrinkage of＝b Pi+a Pj；
a+b＝1；
a＞0，b＞0；
Wherein a and b both represent constants, PRelaxation ofIndicating a diastolic threshold, PShrinkage ofIndicating a systolic threshold, PiRepresenting the initial maximum point of diastolic pressure, PjIndicating the initial minimum point of systolic pressure.
Optionally, in the above method for obtaining the diastolic extreme point and the systolic extreme point according to the real-time invasive blood pressure, the value of a is 1/8-1/2, and the value of b is 1/2-7/8.
Optionally, in the above method for obtaining the diastolic extreme point and the systolic extreme point according to the real-time invasive blood pressure, a is 1/4, and b is 3/4.
Optionally, the method for acquiring a diastolic extreme point and a systolic extreme point according to a real-time invasive blood pressure further includes, after the real-time reading of the invasive blood pressure of the coronary artery and before the acquiring of a maximum value of the invasive blood pressure as an initial diastolic maximum point: generating an invasive blood pressure waveform in a time domain according to the read invasive blood pressure value and time;
if P ist1＜Pt0，Pt1＜Pt2Then t is1Temporal invasive blood pressure Pt1At a trough position of the invasive blood pressure waveform;
if P ist0＜Pt1＜Pt2Then t is1Temporal invasive blood pressure Pt1On the ascending trend line of the invasive blood pressure waveform;
if P ist0＞Pt1＞Pt2Then t is1Temporal invasive blood pressure Pt1On a downward trend line of the invasive blood pressure waveform;
if P ist1＞Pt0，Pt1＞Pt2Then t is1Temporal invasive blood pressure Pt1At a peak position of the invasive blood pressure waveform;
and obtaining a diastolic pressure initial maximum value point and a systolic pressure initial minimum value point according to the wave crest and the wave trough of the invasive blood pressure waveform, the rising trend line and the falling trend line.
In a second aspect, the present application provides a method of obtaining coronary vessel assessment parameters, comprising:
the method for obtaining the diastolic pressure extreme point and the systolic pressure extreme point according to the real-time invasive blood pressure;
obtaining blood vessel evaluation parameters according to the diastolic extreme point and the systolic extreme point, wherein the blood vessel evaluation parameters comprise: mean arterial pressure, mean arterial pressure.
In a third aspect, the present application provides a system for obtaining a diastolic extreme point and a systolic extreme point from a real-time invasive blood pressure, comprising: the device comprises a blood pressure acquisition device, an initial diastolic pressure device, an initial systolic pressure device, a diastolic pressure threshold device, a systolic pressure threshold device, a diastolic pressure extreme point acquisition device and a systolic pressure extreme point acquisition device;
the systolic pressure extreme point acquisition device is connected with the systolic pressure threshold device and the initial systolic pressure device,
the blood pressure acquisition device is connected with the initial diastolic pressure device and the initial systolic pressure device and is used for reading the invasive blood pressure of the coronary artery in real time;
the initial diastolic blood pressure device is used for obtaining the maximum value of invasive blood pressure as the initial maximum diastolic blood pressure value point through comparison according to the real-time invasive blood pressure obtained by the blood pressure collecting device;
the initial systolic pressure device is used for obtaining the minimum value of the invasive blood pressure as the initial minimum value point of the systolic pressure through comparison according to the real-time invasive blood pressure obtained by the blood pressure collecting device;
the diastolic pressure threshold device is connected with the initial diastolic pressure device and the initial systolic pressure device and is used for acquiring a diastolic pressure threshold according to the diastolic pressure initial maximum value point and the initial systolic pressure minimum value point;
the systolic pressure threshold device is connected with the initial diastolic pressure device and the initial systolic pressure device and is used for acquiring a systolic pressure threshold according to the diastolic pressure initial maximum value point and the initial systolic pressure minimum value point;
the diastolic extreme point acquisition devices are connected with the diastolic threshold device and the initial diastolic pressure device, and are used for comparing the diastolic initial maximum point with the diastolic threshold, eliminating the diastolic initial maximum point which does not meet the conditions of the initial diastolic pressure device, and acquiring the diastolic extreme point after updating;
the systolic pressure extreme point acquisition device is connected with the systolic pressure threshold device and the initial systolic pressure device, and is used for comparing the systolic pressure initial minimum value with the systolic pressure threshold, eliminating the systolic pressure initial minimum value which does not meet the conditions of the initial systolic pressure device, and acquiring the systolic pressure extreme point after updating.
Optionally, in the above system for obtaining a diastolic extreme point and a systolic extreme point according to a real-time invasive blood pressure, the blood pressure collecting device includes: the blood pressure acquisition unit is detachably connected with the connecting unit;
the blood pressure acquisition unit comprises a shell, a blood pressure sensor, an information transmission structure and a first connection structure, wherein the blood pressure sensor, the information transmission structure and the first connection structure are all arranged in the shell, and the first connection structure is connected with the information transmission structure;
the connecting unit comprises a main body, a second connecting structure and a third connecting structure, wherein the second connecting structure and the third connecting structure are both arranged on the main body, and the second connecting structure is detachably connected with the first connecting structure;
the third connecting structure is connected with the initial diastolic pressure device and the initial systolic pressure device.
In a fourth aspect, the present application provides a computer storage medium, which when executed by a processor implements the above method for obtaining diastolic and systolic extreme points from real-time invasive blood pressure.
The beneficial effects brought by the scheme provided by the embodiment of the application at least comprise:
the application provides a method for acquiring extreme points of diastolic pressure and systolic pressure according to invasive blood pressure, which comprises the steps of preliminarily acquiring initial extreme points of the diastolic pressure and the systolic pressure, and respectively acquiring thresholds of the diastolic pressure and the systolic pressure according to the extreme points; the extreme points are compared with the threshold value, the extreme points which do not meet the conditions are removed, the extreme points of the diastolic pressure and the systolic pressure are updated, the accuracy of the extreme points of the diastolic pressure and the systolic pressure is improved, and the accuracy is improved for the calculation of the later coronary artery blood vessel evaluation parameters.
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The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a flow chart of a method of acquiring diastolic and systolic extreme points from real-time invasive blood pressure according to the present application;
FIG. 2 is a block diagram of a system for obtaining diastolic and systolic extreme points from real-time invasive blood pressure according to the present application;
FIG. 3 is a schematic structural diagram of a blood pressure collecting device according to the present application;
the following reference numerals are used for the description:
the blood pressure collecting device comprises a blood pressure collecting device 100, a blood pressure collecting unit 110, a shell 111, a first connecting structure 112, a connecting unit 120, a main body 121, a second connecting structure 122, a third connecting structure 123, an initial diastolic blood pressure device 200, an initial systolic blood pressure device 300, a diastolic blood pressure threshold device 400, a systolic blood pressure threshold device 500, a diastolic blood pressure extreme point acquiring device 600 and a systolic blood pressure extreme point acquiring device 700.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the following description, for purposes of explanation, numerous implementation details are set forth in order to provide a thorough understanding of the various embodiments of the present invention. It should be understood, however, that these implementation details are not to be interpreted as limiting the invention. That is, in some embodiments of the invention, such implementation details are not necessary. In addition, some conventional structures and components are shown in simplified schematic form in the drawings.
In the actual clinical use process, the blood pressure measurement is often subject to the movement of a patient or the shaking of a pressure catheter and the like, so that the blood pressure data greatly jumps and is unstable, and the blood pressure data randomly appears. The instantaneous blood pressure measured by the pressure sensor can not accurately judge the systolic minimum value point and the diastolic maximum value point, so that the coronary artery blood vessel evaluation parameters are not accurately calculated.
Example 1:
as shown in fig. 1, the present application provides a method for obtaining a diastolic extreme point and a systolic extreme point from a real-time invasive blood pressure, comprising:
s100, reading the invasive blood pressure of the coronary artery in real time;
s200, obtaining the maximum value of the invasive blood pressure as the initial maximum value point of the diastolic pressure, including:
if P ist0＞Pt1＞Pt2Then t is1Temporal invasive blood pressure Pt1On the descending trend line of the invasive blood pressure waveform, comparing the invasive blood pressure values on all the descending trend lines meeting the conditions to obtain the maximum value of the invasive blood pressure as the initial maximum value point of the diastolic pressure; wherein, Pt1Represents t1Invasive blood pressure at time Pt0Represents the sum of t1Adjacent previous time t0Invasive blood pressure of (P)t2Represents the sum of t1Adjacent later time t2Invasive blood pressure of (1);
s300, obtaining the minimum value of the invasive blood pressure as the initial minimum value point of the systolic pressure, comprising the following steps:
if P ist0＜Pt1＜Pt2Then t is1Temporal invasive blood pressure Pt1Rising trend of invasive blood pressure waveformOn the potential line, comparing the invasive blood pressure values on all rising trend lines meeting the conditions to obtain the minimum value of the invasive blood pressure as the initial minimum value point of the systolic pressure; wherein, Pt1Represents t1Invasive blood pressure at time Pt0Represents the sum of t1Adjacent previous time t0Invasive blood pressure of (P)t2Represents the sum of t1Adjacent later time t2Invasive blood pressure of (1);
s400, respectively acquiring a diastolic pressure threshold value and a systolic pressure threshold value according to the diastolic pressure initial maximum value point and the systolic pressure initial minimum value point, wherein the steps of:
Prelaxation of＝a Pi+b Pj；
PShrinkage of＝b Pi+a Pj；
a+b＝1；
a＞0，b＞0；
Wherein a and b both represent constants, PRelaxation ofIndicating a diastolic threshold, PShrinkage ofIndicating a systolic threshold, PiRepresenting the initial maximum point of diastolic pressure, PjRepresenting an initial minimum value point of the systolic pressure;
s500, comparing the diastolic pressure initial maximum point with a diastolic pressure threshold value, eliminating the diastolic pressure initial maximum point which does not meet the conditions, and obtaining the diastolic pressure maximum point after updating, wherein the steps of:
if the diastolic pressure initial maximum value point is larger than the diastolic pressure threshold value, reselecting the diastolic pressure maximum value point; respectively comparing the diastolic blood pressure value at the peak position with the diastolic blood pressure threshold value in all the descending trend lines in the S200, selecting the descending trend line of which the diastolic blood pressure value at the peak position is smaller than the diastolic blood pressure threshold value, and selecting the diastolic blood pressure maximum value point from the selected descending trend line as the diastolic blood pressure extreme value point;
if the diastolic pressure initial maximum value point is less than or equal to the diastolic pressure threshold, the diastolic pressure initial maximum value point is the diastolic pressure threshold, and reselection is not needed;
s600, comparing the initial minimum value point of the systolic pressure with a systolic pressure threshold value, eliminating the initial minimum value point of the systolic pressure which does not meet the conditions, and updating to obtain the extreme value point of the systolic pressure, wherein the steps comprise:
if the initial minimum value point of the systolic pressure is smaller than the systolic pressure threshold value, reselecting the extreme value point of the systolic pressure; respectively comparing the systolic pressure value at the trough position with the systolic pressure threshold value in all the rising trend lines in the S300, selecting the rising trend line of which the systolic pressure value at the trough position is less than the systolic pressure threshold value, and selecting a systolic pressure minimum value point from the selected rising trend lines as a systolic pressure extreme value point;
and if the initial minimum value point of the systolic pressure is less than or equal to the systolic pressure threshold, the initial minimum value point of the systolic pressure is the systolic pressure threshold, and the initial minimum value point of the systolic pressure does not need to be selected again.
Obtaining initial extreme points of diastolic pressure and systolic pressure preliminarily, and respectively obtaining thresholds of the diastolic pressure and the systolic pressure according to the extreme points; the extreme points are compared with the threshold value, the extreme points which do not meet the conditions are removed, the extreme points of the diastolic pressure and the systolic pressure are updated, the accuracy of the extreme points of the diastolic pressure and the systolic pressure is improved, and the accuracy is improved for the calculation of the later coronary artery blood vessel evaluation parameters.
In one embodiment of the application, the value of a is 1/8-1/2, and the value of b is 1/2-7/8; preferably, a is 1/4 and b is 3/4.
In an embodiment of the present application, after S100 and before S200, the method further includes: generating an invasive blood pressure waveform in a time domain according to the read invasive blood pressure value and time;
if P ist1＜Pt0，Pt1＜Pt2Then t is1Temporal invasive blood pressure Pt1At the trough position of the invasive blood pressure waveform;
if P ist0＜Pt1＜Pt2Then t is1Temporal invasive blood pressure Pt1On the ascending trend line of the invasive blood pressure waveform;
if P ist0＞Pt1＞Pt2Then t is1Temporal invasive blood pressure Pt1On the line of the descending trend of the invasive blood pressure waveform;
if P ist1＞Pt0，Pt1＞Pt2Then t is1Temporal invasive blood pressure Pt1At the peak position of the invasive blood pressure waveform;
and obtaining the diastolic pressure initial maximum value point and the systolic pressure initial minimum value point according to the wave crest and the wave trough of the invasive blood pressure waveform, the rising trend line and the falling trend line.
In the application, if the invasive blood pressure waveform is set, the invasive blood pressure waveform is convenient for a patient to check through an external display screen, and the visual performance is stronger; if only data are collected without generating blood pressure waveforms, the operation of the data is reduced, and the operation is faster.
The application provides a method for acquiring coronary artery blood vessel evaluation parameters, which comprises the following steps:
the method for obtaining the diastolic pressure extreme point and the systolic pressure extreme point according to the real-time invasive blood pressure;
obtaining a blood vessel evaluation parameter according to the diastolic extreme point and the systolic extreme point, wherein the blood vessel evaluation parameter comprises the following steps: mean arterial pressure, mean arterial pressure.
Example 2:
as shown in fig. 2, the present application provides a system for obtaining diastolic extreme points and systolic extreme points from real-time invasive blood pressure, comprising: the blood pressure acquisition device 100, the initial diastolic blood pressure device 200, the initial systolic blood pressure device 300, the diastolic blood pressure threshold device 400, the systolic blood pressure threshold device 500, the diastolic blood pressure extreme point acquisition device 600 and the systolic blood pressure extreme point acquisition device 700; the systolic pressure extreme point acquisition device 700 is connected with the systolic pressure threshold device 500 and the initial systolic pressure device 300, and the blood pressure acquisition device 100 is connected with the initial diastolic pressure device 200 and the initial systolic pressure device 300 and is used for reading invasive blood pressure of coronary arteries in real time; the initial diastolic blood pressure device 200 is used for obtaining the maximum value of the invasive blood pressure as the initial maximum diastolic blood pressure value point through comparison according to the real-time invasive blood pressure obtained by the blood pressure collecting device; the initial systolic pressure device 300 is used for obtaining the minimum value of the invasive blood pressure as the initial minimum value point of the systolic pressure through comparison according to the real-time invasive blood pressure obtained by the blood pressure collecting device; the diastolic pressure threshold device 400 is connected to the initial diastolic pressure device 200 and the initial systolic pressure device 300, and is configured to obtain a diastolic pressure threshold according to the diastolic pressure initial maximum value point and the initial systolic pressure minimum value point; the systolic pressure threshold device 500 is connected to the initial diastolic pressure device 200 and the initial systolic pressure device 300, and is configured to obtain a systolic pressure threshold according to the diastolic pressure initial maximum value point and the initial systolic pressure minimum value point; the diastolic extreme point acquisition device 600 is connected to the diastolic threshold device 400 and the initial diastolic pressure device 200, and is configured to compare the diastolic initial maximum point with the diastolic threshold, remove the diastolic initial maximum point that the initial diastolic pressure device does not meet the conditions, and obtain the diastolic extreme point after updating; the systolic extreme point acquiring device 700 is connected to the systolic threshold device 500 and the initial systolic pressure device 300, and is configured to compare the systolic initial minimum point with the systolic threshold, reject the systolic initial minimum point that the initial systolic pressure device does not meet the conditions, and obtain the systolic extreme point after updating.
As shown in fig. 3, in one embodiment of the present application, a blood pressure collecting apparatus 100 includes: the blood pressure acquisition unit 110 and the connection unit 120 are detachably connected, and the blood pressure acquisition unit 110 and the connection unit 120 are detachably connected; the blood pressure collecting unit 110 comprises a shell 111, a blood pressure sensor, an information transmission structure and a first connection structure 112, wherein the blood pressure sensor, the information transmission structure and the first connection structure 112 are all arranged in the shell 111, and the first connection structure 112 is connected with the information transmission structure; the connection unit 120 includes a main body 121, a second connection structure 122 and a third connection structure 123, the second connection structure 122 and the third connection structure 123 are both disposed on the main body 121, and the second connection structure 122 is detachably connected to the first connection structure 112; the third connecting structure 123 is connected to the initial diastolic blood pressure device 200 and the initial systolic blood pressure device 300.
The blood pressure collecting device comprises the blood pressure collecting unit and the connecting unit which are detachably connected, and the integrated structure is divided into two parts, so that the installation process is simplified, the cost is saved, and the replacement of parts is facilitated; the shell, the blood pressure sensor, the information transmission structure and the first connecting structure are arranged into a whole, so that the collection and transmission of the end of the blood pressure sensor are realized, and the sealing performance of the blood pressure sensor is improved; the connecting device connected with the external equipment is independently arranged, so that the packaging and transportation volume is reduced, the cost is saved, and the installation is easy.
A computer storage medium is provided, and a computer program when executed by a processor implements the above-described method of obtaining diastolic and systolic extreme points from real-time invasive blood pressure.
The above-mentioned embodiments of the present invention, which further illustrate the objects, technical solutions and advantages of the present invention, should be understood that the above-mentioned embodiments are only examples of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (11)
1. A method for obtaining diastolic and systolic extreme points from real-time invasive blood pressure, comprising:
reading the invasive blood pressure of the coronary artery in real time;
obtaining the maximum value of invasive blood pressure as the initial maximum value point of diastolic pressure;
obtaining the minimum value of invasive blood pressure as the initial minimum value point of systolic pressure;
respectively acquiring a diastolic pressure threshold value and a systolic pressure threshold value according to the diastolic pressure initial maximum value point and the systolic pressure initial minimum value point;
comparing the diastolic pressure initial maximum point with the diastolic pressure threshold, eliminating the diastolic pressure initial maximum point which does not meet the conditions, and obtaining a diastolic pressure extreme point after updating;
and comparing the initial minimum value point of the systolic pressure with the systolic pressure threshold value, eliminating the initial minimum value point of the systolic pressure which does not meet the conditions, and updating to obtain the extreme value point of the systolic pressure.
2. The method of claim 1, wherein said obtaining a maximum value of invasive blood pressure as an initial maximum point of diastolic pressure comprises:
if P ist0＞Pt1＞Pt2Then t is1Temporal invasive blood pressure Pt1On the descending trend line of the invasive blood pressure waveform, comparing the invasive blood pressure values on all the descending trend lines meeting the conditions to obtain the maximum value of the invasive blood pressure as the initial maximum value point of the diastolic pressure; wherein, Pt1Represents t1Invasive blood pressure at time Pt0Represents the sum of t1Adjacent previous time t0Invasive blood pressure of (P)t2Represents the sum of t1Adjacent later time t2The invasive blood pressure of (1).
3. The method of claim 1, wherein the obtaining the minimum of the invasive blood pressure as the initial minimum of the systolic blood pressure comprises:
if P ist0＜Pt1＜Pt2Then t is1Temporal invasive blood pressure Pt1On the ascending trend line of the invasive blood pressure waveform, comparing the invasive blood pressure values on all the ascending trend lines meeting the conditions to obtain the minimum value of the invasive blood pressure as the initial minimum value point of the systolic pressure; wherein, Pt1Represents t1Invasive blood pressure at time Pt0Represents the sum of t1Adjacent previous time t0Invasive blood pressure of (P)t2Represents the sum of t1Adjacent later time t2The invasive blood pressure of (1).
4. The method of claim 1, wherein said method of obtaining a diastolic threshold value and a systolic threshold value from said diastolic initial extreme point and said systolic initial extreme point comprises:
Prelaxation of＝a Pi+b Pj；
PShrinkage of＝b Pi+a Pj；
a+b＝1；
a＞0，b＞0；
Wherein a and b both represent constants, PRelaxation ofIndicating a diastolic threshold, PShrinkage ofIndicating a systolic threshold, PiRepresenting the initial maximum point of diastolic pressure, PjIndicating the initial minimum point of systolic pressure.
5. The method for obtaining diastolic and systolic extreme points according to real-time invasive blood pressure as claimed in claim 4, wherein a is 1/8-1/2 and b is 1/2-7/8.
6. The method of claim 5 wherein a is 1/4 and b is 3/4 for obtaining diastolic and systolic pressure extremes based on real-time invasive blood pressure.
7. The method for obtaining diastolic and systolic extreme points according to real-time invasive blood pressure as claimed in claim 2 or 3, wherein after said real-time reading of the invasive blood pressure of coronary artery, before said obtaining of the maximum value of the invasive blood pressure as the initial maximum point of diastolic pressure, further comprises: generating an invasive blood pressure waveform in a time domain according to the read invasive blood pressure value and time;
if P ist1＜Pt0，Pt1＜Pt2Then t is1Temporal invasive blood pressure Pt1At a trough position of the invasive blood pressure waveform;
if P ist0＜Pt1＜Pt2Then t is1Temporal invasive blood pressure Pt1On the ascending trend line of the invasive blood pressure waveform;
if P ist0＞Pt1＞Pt2Then t is1Temporal invasive blood pressure Pt1On a downward trend line of the invasive blood pressure waveform;
if P ist1＞Pt0，Pt1＞Pt2Then t is1Temporal invasive blood pressure Pt1At a peak position of the invasive blood pressure waveform;
and obtaining a diastolic pressure initial maximum value point and a systolic pressure initial minimum value point according to the wave crest and the wave trough of the invasive blood pressure waveform, the rising trend line and the falling trend line.
8. A method of obtaining coronary vessel assessment parameters, comprising:
the method of any one of claims 1 to 7 for obtaining diastolic and systolic extreme points from real-time invasive blood pressure;
obtaining blood vessel evaluation parameters according to the diastolic extreme point and the systolic extreme point, wherein the blood vessel evaluation parameters comprise: mean arterial pressure, mean arterial pressure.
9. A system for obtaining extreme diastolic and systolic pressure values from real-time invasive blood pressure, according to any of claims 1 to 7, comprising: the device comprises a blood pressure acquisition device, an initial diastolic pressure device, an initial systolic pressure device, a diastolic pressure threshold device, a systolic pressure threshold device, a diastolic pressure extreme point acquisition device and a systolic pressure extreme point acquisition device;
the systolic pressure extreme point acquisition device is connected with the systolic pressure threshold device and the initial systolic pressure device,
the blood pressure acquisition device is connected with the initial diastolic pressure device and the initial systolic pressure device and is used for reading the invasive blood pressure of the coronary artery in real time;
the initial diastolic blood pressure device is used for obtaining the maximum value of invasive blood pressure as the initial maximum diastolic blood pressure value point through comparison according to the real-time invasive blood pressure obtained by the blood pressure collecting device;
the initial systolic pressure device is used for obtaining the minimum value of the invasive blood pressure as the initial minimum value point of the systolic pressure through comparison according to the real-time invasive blood pressure obtained by the blood pressure collecting device;
the diastolic pressure threshold device is connected with the initial diastolic pressure device and the initial systolic pressure device and is used for acquiring a diastolic pressure threshold according to the diastolic pressure initial maximum value point and the initial systolic pressure minimum value point;
the systolic pressure threshold device is connected with the initial diastolic pressure device and the initial systolic pressure device and is used for acquiring a systolic pressure threshold according to the diastolic pressure initial maximum value point and the initial systolic pressure minimum value point;
the diastolic extreme point acquisition devices are connected with the diastolic threshold device and the initial diastolic pressure device, and are used for comparing the diastolic initial maximum point with the diastolic threshold, eliminating the diastolic initial maximum point which does not meet the conditions of the initial diastolic pressure device, and acquiring the diastolic extreme point after updating;
the systolic pressure extreme point acquisition device is connected with the systolic pressure threshold device and the initial systolic pressure device, and is used for comparing the systolic pressure initial minimum value with the systolic pressure threshold, eliminating the systolic pressure initial minimum value which does not meet the conditions of the initial systolic pressure device, and acquiring the systolic pressure extreme point after updating.
10. The system for obtaining extreme points of diastolic and systolic blood pressures as recited in claim 9, wherein said blood pressure collection means comprises: the blood pressure acquisition unit is detachably connected with the connecting unit;
the blood pressure acquisition unit comprises a shell, a blood pressure sensor, an information transmission structure and a first connection structure, wherein the blood pressure sensor, the information transmission structure and the first connection structure are all arranged in the shell, and the first connection structure is connected with the information transmission structure;
the connecting unit comprises a main body, a second connecting structure and a third connecting structure, wherein the second connecting structure and the third connecting structure are both arranged on the main body, and the second connecting structure is detachably connected with the first connecting structure;
the third connecting structure is connected with the initial diastolic pressure device and the initial systolic pressure device.
11. A computer storage medium, wherein a computer program when executed by a processor implements the method of obtaining diastolic and systolic extreme points from real-time invasive blood pressure according to any of claims 1 to 7.
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| CN201911210004.1A CN112155531A (en) | 2019-11-29 | 2019-11-29 | Method and system for obtaining diastolic pressure and systolic pressure extreme points according to invasive blood pressure |
| PCT/CN2019/122911 WO2021103067A1 (en) | 2019-11-29 | 2019-12-04 | Method and system for acquiring extreme points of diastolic pressure and systolic pressure according to invasive blood pressure |
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