| 摘要 |
<p>PURPOSE:To improve correction accuracy of blood pressure measurement by the pulse wave propagation time by measuring the pulse wave propagation time immediately before and after pressurization on the artery at the time of obtaining the blood pressure value and the pulse wave propagation time measured by a volume vibration method. CONSTITUTION:A cuff 1 is installed on a finger of a testee, and an electrode 7 is installed on the breast. An electrocardiogram R wave detecting part 8 detects the R wave of an electrocardiogram waveform from the output of the electrode 7. A pulse wave sensor 9 is also installed on a finger of a testee, and a pulse wave detecting part 10 detects a pulse wave of an installation region of a testee from the output of the pulse wave sensor 9. The output of the pulse wave detecting part 10 reaches a pulse wave bottom detecting part 12, and the bottom value of a pulse wave is detected. MPU 14 executes a processing program according to signals given from A/D converts 6, 11, an electrocardiogram R wave detecting part 8, a pulse wave bottom detecting part 12 and a key 13, outputs necessary control signals to an exhaust valve 2 and a pressurizing pump 3, and outputs the processing result to a display device 15. The propagation time T and the blood pressure P are expressed by the expression P=alphaT1+beta, wherein alpha and beta are constants.</p> |
