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Acquisition and processing method for measuring kororkoff sound information of blood pressure with auscultatory method and device

A processing method and technology of Korotkoff sound, applied in auscultation instruments, diagnosis, applications, etc., can solve problems such as affecting the results of auscultation blood pressure measurement, affecting the accuracy of auscultation blood pressure measurement results, and reducing the range.

Inactive Publication Date: 2010-03-10
BEIHANG UNIV +2
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  • Claims
  • Application Information

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Problems solved by technology

The accuracy of auscultation is greatly limited by observer error
Another example, a stethologist who has just returned from a noisy environment, his hearing sensitivity will decline at this time, if he immediately conducts auscultation blood pressure measurement, the range of Korotkoff sounds he can hear will be decreased, thereby affecting auscultatory blood pressure measurements
This again shows that the subjective factors of the auscultator will affect the accuracy of the auscultation blood pressure measurement results

Method used

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  • Acquisition and processing method for measuring kororkoff sound information of blood pressure with auscultatory method and device
  • Acquisition and processing method for measuring kororkoff sound information of blood pressure with auscultatory method and device
  • Acquisition and processing method for measuring kororkoff sound information of blood pressure with auscultatory method and device

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Embodiment Construction

[0026] This example Korotkoff sound information acquisition and processing device is (see figure 1 )

[0027] This device includes the air bag and cuff connected to the automatic inflation and deflation device required for traditional auscultation blood pressure measurement, the stethoscope head that can obtain Korotkoff sound information from the cuff, and the measurement microphone connected with the stethoscope head, and the output port of the measurement microphone It is connected with the input terminal of the upper computer through a preamplifier, a signal conditioning circuit, a 24-bit analog-to-digital converter and a microcontroller in turn.

[0028] The model of the above measurement microphone is BSWA MPA201, which can meet the requirements of IEC61672 for Class 1 sound level meters, and can be used for acoustic measurement instruments with type precision requirements.

[0029] Adopting said device to realize the acquisition and processing method of Korotkoff sound...

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Abstract

The invention relates to an acquisition and processing method for measuring kororkoff sound information of blood pressure with an auscultatory method and a device; the method comprises the following steps: a kororkoff sound signal is acquired by a stethoscope head, instantaneous sound pressure of the kororkoff sound signal acquired by the stethoscope head is acquired to a computer to be stored bya measurement microphone and an analog-digital converter, weighted sound pressure level of the kororkoff sound signal is calculated according to a sound-pressure-level measurement method specified inANSI S1.4 or IEC 61672-1 standard, the corresponding sound pressure level threshold value is set, the kororkoff sound above the threshold value is considered to be audible, the kororkoff sound below the threshold value is considered to be inaudible. The acquisition and processing information in the method is used for determining blood pressure value measured by the auscultatory method, thereby reducing effect of subjective factors of an auscultator on blood measuring results and realizing objective and scientific blood pressure auscultation measurement.

Description

technical field [0001] The invention belongs to a method and device for obtaining and processing information related to human physiological parameters, and in particular to a method and device for obtaining and processing Korotkoff sound information for measuring arterial blood pressure by auscultation. Background technique [0002] Blood pressure is an important physiological parameter reflecting the health status of the human body. Accurate measurement of blood pressure is of great significance for disease prevention, treatment and early detection of diseases. At present, the methods of non-invasive blood pressure measurement mainly include auscultation based on Korotkoff sounds, oscillometric method, palpation method, ultrasound method and so on. Among them, the auscultation method is recognized by the international medical community as a standard method for non-invasive blood pressure measurement, and has been widely used clinically. The currently popular evaluation cr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/022A61B7/00
Inventor 俞梦孙王宇奇向海燕
Owner BEIHANG UNIV
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