A kind of Korotkoff sound phase classification recognition method and system
A technology for classification and recognition of Korotkoff sounds, applied in medical science, diagnosis, cardiac catheterization, etc., can solve the problem that the oscillometric method cannot complete accurate measurement of special populations, the manual auscultation method is inconvenient for blood pressure monitoring, and does not involve the phase recognition of Korotkoff sounds and judgment
Active Publication Date: 2021-08-17
SICHUAN UNIV
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Problems solved by technology
Therefore, the oscillometric method cannot complete the accurate measurement of special populations
Although manual auscultation can measure the blood pressure of special populations, the measurement results are highly correlated with the experience of the measuring physician and the accuracy of the operation. It is difficult to guarantee the reliability of the measurement results, and the manual auscultation method is not convenient for people to Self-monitoring of blood pressure at home
In addition, some automatic auscultation methods have appeared in the prior art, which can identify and judge the appearance and disappearance of Korotkoff sounds, but none of these methods and technologies involve the identification and judgment of the phase of Korotkoff sounds
Therefore, the existing non-invasive blood pressure measurement methods cannot meet the blood pressure measurement requirements of special populations
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[0032] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present invention are not limited to the specific embodiments listed below, and those skilled in the art will not depart from the concept of the present invention. Below, equivalent substitutions can be made to the solution of the present invention.
[0033] see figure 1 Shown, the Korotkoff sound time-phase classification identification method of the present invention may further comprise the steps:
[0034] S1. Obtain cuff pressure data P and stethoscope audio data K;
[0035] S2. Extract pressure pulse wave data P from the acquired cuff pressure data O , detect the vertices of the pressure pulse wave data to obtain the vertex position sequence P i ;
[0036] S3. Perform pre-emphasis processing on the stethoscope audio data K to obtain the stethoscope audio data K 1 ;
[0037] S4. Take the ve...
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The invention discloses a method and system for classifying and identifying Korotkoff sound time phases. Aiming at the properties of different acoustic and time-frequency characteristics of Korotkoff sounds in different time phases (I, II, III, IV and V time phases), the collected data Perform preprocessing, and based on the deep neural network and related processing algorithms, automatically classify and recognize the Korotkoff sound signals collected from the stethoscope, so that it can distinguish the different phases of Korotkoff sounds and output the recognition results of the phases . The method and system provided by the invention can realize accurate and efficient recognition of different phases of Korotkoff sounds.
Description
technical field [0001] The invention relates to the technical field of blood pressure measurement, and in particular, to a method and system for classifying and identifying Korotkoff sounds. Background technique [0002] When using manual auscultation for blood pressure measurement, it is necessary to inflate and pressurize the cuff wrapped around the upper arm to block the blood flow of the brachial artery, and then deflate it at a constant speed. As the pressure drops, blood rushes back through the blood vessels, producing rhythmic sounds called Korotkoff sounds that are identical to the beat of the cardiac cycle. The characteristics of Korotkoff sounds change as the cuff pressure decreases. This process is divided into five phases: I, II, III, IV and V phases, also known as snapping, murmur, slap, Covering and disappearing sounds. [0003] For most adults, the cuff pressures corresponding to the first Korotkoff sound heard and the last Korotkoff sound heard are recorded...
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IPC IPC(8): A61B5/022
CPCA61B5/02208A61B5/7267
Inventor 潘帆何培宇郑定昌
Owner SICHUAN UNIV