A novel strain-gauge plethysmography method detected a significant difference in maximum radial artery strain compliance between hypertensive and normotensive patients (p < 0.005).
Cross-Sectional (n=37)
Does a novel compliance measurement using strain-gauge plethysmography detect differences in radial artery compliance between hypertensive and normotensive patients?
A novel strain-gauge plethysmography method can successfully measure radial artery compliance and differentiate between hypertensive and normotensive patients.
p-value: p=< 0.005
We propose a novel method for assessing the compliance of the radial artery by using a two-axis mechanism and a standard positioning procedure for detecting the optimal measuring site. A modified sensor was designed to simultaneously measure the arterial diameter change waveform (ADCW) and pressure pulse waveform with a strain gauge and piezoresistor. In the x-axis scanning, the sensor could be placed close to the middle of the radial artery when the ADCW reached the maximum amplitude. In the Z-axis scanning, the contact pressure was continuously increased for data measurement. Upon the deformation of the strain gauge following the change in the vascular cross-section, the ADCW was transferred to the change of the vascular radius. The loaded strain compliance of the radial artery (C(strain)) can be determined by dividing the dynamic changed radius by the pulse pressure. Twenty-three untreated, mild or moderate hypertensive patients aged 29-85 were compared with 14 normotensive patients aged 25-62. The maximum strain compliance between the two groups was significantly different (p < 0.005). Of the hypertensive patients, 14 were at risk of developing hyperlipidemia. There was a significant difference between this and the normotension group (p < 0.005).
劉ら（Thu、）は、高血圧における横断的研究を行いました（n=37）。高血圧と正常血圧を最大ストレイン適合性で評価しました（p=< 0.005）。新しいストレインゲージの容積変化法により、高血圧患者と正常血圧患者の最大橈骨動脈ストレイン適合性の間に有意差が検出されました（p < 0.005）。