Ambulatory blood pressure measuring device and method based on pulse wave transmission time difference of left brachial artery and right brachial artery

Abstract

The invention discloses an ambulatory blood pressure measuring device and method based on pulse wave transmission time difference of a left brachial artery and a right brachial artery. The ambulatory blood pressure measuring device comprises a pulse wave acquiring probe, a data processing analog circuit unit and an ambulatory blood pressure meter main body portion. The pulse wave acquiring probe is electrically connected with the data processing analog circuit unit, the data processing analog circuit unit is electrically connected with the ambulatory blood pressure meter main body portion, the pulse wave acquiring probe acquires blood pressure data and transfers the blood pressure data to the data processing analog circuit unit, the data processing analog circuit unit preprocesses received data and sends the pre-processed data to the ambulatory blood pressure meter main body portion, and the ambulatory blood pressure meter main body portion processes pulse wave data and calculates a blood pressure numerical value. The ambulatory blood pressure measuring device and method can dynamically monitor blood pressure and reduce the requirement for gestures of measured persons, measurement can be performed in normal life, 24-hour blood pressure monitoring is conveniently achieved, and normal life of the measured persons is basically not influenced.

Description

【Technical field】 [0001] The invention belongs to the technical field of blood pressure measurement, and relates to a device and method for dynamically outputting blood pressure values, in particular to a device and method for non-invasive continuous blood pressure measurement using a pulse wave transmission velocity method. 【Background technique】 [0002] Currently, commonly used blood pressure measuring devices include mercury sphygmomanometers, electronic sphygmomanometers based on vibrometric methods, and the like. These sphygmomanometers all require an inflatable cuff that is wrapped around the subject's arm for measurement. Patents on such blood pressure measuring devices have been published, such as US Patent Nos. 4,625,277, 5,215,096, and 6,602,200. Both electronic sphygmomanometers and mercury sphygmomanometers based on vibrometric methods are based on the vascular unloading theory. Taking the electronic sphygmomanometer based on vibrometer as an example, when the ...

AI Technical Summary

Problems solved by technology

[0003] The cuff-type blood pressure measurement method has been widely used clinically, but the cuff-type sphygmomanometer has the following disadvantages: First, it takes a process to inflate and deflate, which determines that it takes a long time to measure blood pressure once. , the blood pressure signal between two blood pressure measurement processes cannot be monitored, and the blood pressure during this period is likely to fluctuate, so the blood pressure signal will be missed. Obviously, the regular blood pressure measurement in the past can no longer meet the demand

Second, the cuff is wrapped around the arm to inflate and deflate, which will cause discomfort to the subject, especially in the case of frequent measurements, and in severe cases, it may even cause damage to the skin and other tissues of the subject

However, there is a problem with the calibration technology. The pulse wave transmission speed is calculated by the pulse wave between two arterial points, and the blood pressure value measured by the cuff sphygmomanometer is used for calibration. In future use, the position of the sampling point may shift , so there is an error in the length of the blood vessel, that is, the pulse wave transmission distance, which will directly lead to an increase in the final blood pressure output error

If you want to overcome this error, you need to calibrate every time you use it, but it is obviously very troublesome

[0008] Second, the sampling lacks stability. Because the sampling method generally uses the radial artery of the wrist or the fingertip pulse wave through the photoelectric volume description method, these points are sensitive to human body activities, so the subject is required to remain still during the measurement period, which is not satisfactory. Facilitate 24-hour dynamic monitoring

Images