Key result
Estimating systemic arterial compliance using the volume clamp method at the peripheral artery showed significant correlation (r=0.73) with applanation tonometry in elderly patients.
Why the study?
Does the volume clamp method at the peripheral artery accurately estimate systemic arterial compliance compared to applanation tonometry in elderly patients?
Cross-Sectional (n=47)
Does the volume clamp method at the peripheral artery accurately estimate systemic arterial compliance compared to applanation tonometry in elderly patients?
The volume clamp method at the finger artery provides a valid, noninvasive alternative to applanation tonometry for estimating systemic arterial compliance in elderly patients.
Answers are grounded in this paper and cite their sources.
May support volume clamp as noninvasive alternative in elderly; leaves open clinical adoption pending validation.
Systemic arterial compliance (SAC) defining the hemodynamics for the aged can be calculated from the blood pressure waveform of the carotid artery recorded by applanation tonometry (AT). However, the recording of the waveform by AT is not easy. This study was intended to investigate the validity of evaluation method of SAC using volume clamp method (VC) at peripheral artery (finger artery). Continuous blood pressure waveform was measured using VC and AT for 47 elderly patients. Blood pressure waveform of finger artery was transformed by transfer function into waveform of brachial artery. Significant correlationship (r=0.73) between the measured values of the ratio of the area under arterial blood pressure waveform at one heart beat cycle and at left ventricular diastole by VC and AT was observed, and its agreement was good. As a consequence, validity of the method using waveform of brachial artery transformed from the blood pressure waveform recorded at peripheral artery by VC was verified as a noninvasive estimate of systemic arterial compliance for elderly people.
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Otsuki et al. (2003) reported a cross-sectional. Volume clamp method (VC) at peripheral artery vs. Applanation tonometry (AT) at carotid artery was evaluated on Correlation of the ratio of the area under arterial blood pressure waveform at one heart beat cycle and at left ventricular diastole (r=0.73). Estimating systemic arterial compliance using the volume clamp method at the peripheral artery showed significant correlation (r=0.73) with applanation tonometry in elderly patients.
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