Blood pressure calculation method based on pulse reflected wave transit time, and blood pressure meter

摘要

A blood pressure calculation method based on pulse reflected wave transit time, and a blood pressure meter. The method comprises the following steps: S1: collecting and storing pulse waveform data of a fingertip; S2: processing the pulse waveform data, so as to obtain a heart rate and parameters of each pulse cycle, detecting time axis coordinates of a pulse wave dominant wave starting point SPL1 and a reflected wave growth point SPL2 within each pulse cycle, and calculating corresponding pulse reflected wave transit time (RWTT): RWTT=SPL2-SPL1; S3: calculating to form a RWTT array; and S4: calculating a systolic pressure and a diastolic pressure according to the RWTT array and the heart rate. The present blood pressure calculation method and blood pressure meter measure a fingertip pulse using only one sensor, thus achieving simplicity, convenience, and quickness; by analyzing a correlation theory basis of a pulse reflected wave and a human blood pressure, correlation models between RWTT and a systolic pressure as well as a diastolic pressure are established, and the systolic pressure and the diastolic pressure are calculated according to two blood models; and the systolic pressure and the diastolic pressure, calculated by means of the present method, are more accurate, and less in error, and the application range is large.