Measurement of Blood Pressure Using an Arterial Pulsimeter Equipped with a Hall Device

Abstract

To measure precise blood pressure (BP) and pulse rate without using a cuff, we have developed an arterial pulsimeter consisting of a small, portable apparatus incorporating a Hall device. Regression analysis of the pulse wave measured during testing of the arterial pulsimeter was conducted using two equations of the BP algorithm. The estimated values of BP obtained by the cuffless arterial pulsimeter over 5 s were compared with values obtained using electronic or liquid mercury BP meters. The standard deviation between the estimated values and the measured values for systolic and diastolic BP were 8.3 and 4.9, respectively, which are close to the range of values of the BP International Standard. Detailed analysis of the pulse wave measured by the cuffless radial artery pulsimeter by detecting changes in the magnetic field can be used to develop a new diagnostic algorithm for BP, which can be applied to new medical apparatus such as the radial artery pulsimeter.

Peripheral Blood Flow Velocity and Peripheral Pulse Wave Velocity Measured Using a Clip-type Pulsimeter Equipped with a Permanent Magnet and a Hall Device

“…The periodicity of the pulse vessel has a special quality and relationship to the ECG wave and the BFV changes periodically [1,2]. The prototype products used in this research consisted of a permanent magnet, Hall sensor, measurement part, light emitting diode (LED), display panel, USB port, switch etc., as shown in Fig.…”

“…In general, blood flow velocity (BFV) monitored by measuring the signal of a pressurized sensor module in a patient's wrist or forearm does not provide customers with useful information regarding disease or health of the cardiovascular system [1]. Also, the BFV is difficult to measure by noninvasive methods under constant pressure without additional pressurization.…”

“…In this research, the interrelation of each signal and the special quality of the data of pulse wave measured by a clip-type pulsimeter equipped with a permanent magnet and a Hall device were studied utilizing patient monitoring equipment that displayed both signals of the radial artery pulse (RAP) and the photoplethysmography (PPG) wave [1,2]. In particular, the peripheral blood flow velocity (PBFV) and the peripheral pulse wave velocity (PPWV) simultaneously measured using the clip-type pulsimeter and the PPG were investigated.…”

Pulse Wave Velocity Measured by Radial Artery Clip-type Pulsimeter Equipped with a Hall Device and Electrocardiogram

“…Used in this experiment, key component of clip-type pulsimeter and the displacement between the Hall effect device and the magnet is 2.5 mm [4,5]. The permanent magnet inside (1 mm), is moving up and down by high and low vibration, when placed at artery pulse.…”

Analysis of Both Hands' Two Pulse Waveforms using a Clip-type Pulsimeter Equipped with Magnetic Sensing Hall Device

“…The oriental six pulses: the "Chon", "Chwan", and "Chuck" of both the left and right hand have to be carefully considered as they imply different meanings. Most of existing pulsimeters developed so far have a very critical limitation, they can only diagnose pulses from one spot [7,8].…”