Method and system for feature extraction and classification of auscultation sphygmomanometer

Abstract

The invention comprises a method for stethoscopy sphygmomanometer feature extraction and classification. The method comprises the steps that A, sampling is performed on Korotkoff and pressure vibration waves; B, the sampled Korotkoff and pressure vibration waves are preprocessed; C, feature extraction is performed on the preprocessed pressure vibration waves, meanwhile, features of Korotkoff are extracted, and feature vectors are formed; D, the feature vectors are classified, and Korotkoff is further recognized. The invention further comprises a system for stethoscopy sphygmomanometer feature extraction and classification. The system comprises a sampling module, a preprocessing module, a feature extraction module and a Korotkoff recognition module, wherein the sampling module is used for sampling Korotkoff and pressure vibration waves; the preprocessing module is used for preprocessing the Korotkoff and pressure vibration waves, the feature extraction module is used for extracting features of pressure vibration waves and Korotkoff at the same time to form the feature vectors; the Korotkoff recognition module is used for classifying the feature vectors and further recognizing the Korotoff. The method and system for stethoscopy sphygmomanometer feature extraction and classification has the advantages of improving blood pressure measurement accuracy and improving anti-jamming capability during blood pressure measurement.

Description

technical field [0001] The invention relates to a method and system for feature extraction and classification of auscultation sphygmomanometers, belonging to the field of digital signal processing of Korotkoff sounds. Background technique [0002] There are two main methods of non-invasive blood pressure measurement: auscultation and oscillometric method. The auscultation method is also called the Korotkoff method, which is to bind the armband of the manometer (commonly called a sphygmomanometer) to the pulse position of the brachial artery of the upper arm, inflate and pressurize the brachial artery, and then deflate and decompress. As the external pressure drops, the blood flow opens the blood vessel again, and the same rhythmic sound as the heartbeat is issued, which is the Korotkoff sound. When the "first sound" is heard with a stethoscope, the external pressure displayed by the manometer is recorded as the systolic pressure, and when the "last sound" is recorded as the...

AI Technical Summary

Problems solved by technology

The oscillometric method of judging blood pressure, whether it is the waveform feature method or the amplitude coefficient method, cannot find an obvious point where the external pressure is equal to the blood pressure for the individual. Therefore, the blood pressure measured by the oscillometric method is derived based on statistics. For some individuals, the error is relatively large, so it is difficult to accurately measure blood pressure

Images