Method and apparatus for measuring blood pressure by using blood oxygen concentration and electrocardiograph

Abstract

A method for measuring blood pressure by use of oximeter and electrocardiograph includes such steps as using oximeter to measure the waveform of continuously varied blood oxygen period, using electrocardiograph to measure the pulse time segments of systolic pressure and diastolic pressure, using microprocessor to calculate out the sectional area relative to said waveform and time segment, and using a stored equation to calculate out the values of systolic pressure and diastolic pressure. Its apparatus is also disclosed.

Description

technical field [0001] The present invention provides a method and device for measuring blood pressure by using a blood oxygen concentration and an electrocardiogram measuring instrument. The blood oxygen cycle continuous change waveform measured by the blood oxygen concentration measuring instrument and the systolic blood pressure and diastolic blood pressure pulse time segments measured by the electrocardiogram correspond to each other to obtain an accurate blood pressure value. Background technique [0002] Sphygmomanometers can be divided into two categories: invasive and non-invasive. Non-invasive sphygmomanometers are further divided into traditional mercury sphygmomanometers and electronic sphygmomanometers. Most electronic sphygmomanometers currently on the market are based on listening methods and The resonance method is the main method, while the electronic sphygmomanometer measurement method of the listening method uses the Korotkoff sound method to distinguish th...

AI Technical Summary

Problems solved by technology

The method can be divided into two types: reflective and penetrating. The reflective optical sensor uses the light energy emitted by the LED to reflect to the sensor in the dermis, while the penetrating sensor uses two different wavelengths of LED light (such as : red light and infrared light) pass through the finger tissue, the signal is received by the receiver under the finger, and the change of the blood vessel diameter due to the pulsation of the artery will cause the deflection of the projected light, and then the deflection angle is passed through the light The method of converting electrical energy draws a continuous waveform on the time axis, as shown in Figure 1a. Similarly, blood pressure and blood vessel volume changes produce the same periodic signal wave, and a blood pressure cycle is defined by the heart contraction Until the beginning of the next contraction, that is, the time period surrounded by troughs and troughs in each periodic signal, since the change of blood vessel volume reflected by this optical detection method does not represent the absolute value of blood vessel volume, the measured The amplitude depicted on the time axis of the waveform of the vascular diameter change purely represents the magnitude of the potential when the data is captured, and it is also the result of the convolution of the heart contraction and the effect of the blood vessel wall, so it is impossible to accurately calculate each blood pressure. The peak and trough positions of the cycle, so it is impossible to measure accurate blood pressure values

Images