Showing a limited preview of this publication:
Abstract
A simple and non-intrusive approach termed the pulse transit time ratio (PTTR) has recently been shown to be a potential surrogate of the ankle-brachial index (ABI). PTTR is based on the principle of PTT, which is known to be temperature-sensitive. In this study, 23 healthy adults with normally perfused peripheries and 10 with poorly perfused peripheries were recruited. No significant change in PTTR was observed between those with cold (1.287±0.043) and normal (1.290±0.027) peripheries (p>0.05). A cold periphery may cause pulse waveform changes and indirectly affect PTT owing to poor skin microcirculation, but may have a limited effect on PTTR, which is useful as an ABI alternative.
Keywords: ankle-brachial index; blood pressure; electrocardiogram; non-invasive prolonged monitoring; photoplethysmography; pulse transit time
Received: 2007-9-12
Accepted: 2008-1-19
Published Online: 2008-06-11
Published in Print: 2008-06-01
©2008 by Walter de Gruyter Berlin New York
