Non-invasive determination of instantaneous brachial blood flow using the oscillometric method
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Shing-Hong Liu
Abstract
The oscillometric method has been widely used to measure arterial systolic and diastolic blood pressures, but its potential for arterial blood flow measurements still remains to be explored. The aim of this study was to non-invasively determine arterial blood flow using an oscillometric blood flow measurement system. The system consists of a pneumatic elastic cuff, an air-pumping motor, a releaser valve, a pressure transducer, and an airflow meter. To build a non-linear cuff model, we measured airflow pumped into the pneumatic cuff and cuff pressure using an airflow meter and pressure transducer during the inflation period, respectively. During the deflation period, only the pressure transducer was used to record cuff pressure. Based on the cuff model, the oscillometric blood flow waveform was obtained by integrating the oscillometric pressure waveform. We compared arterial blood flow derived from the maximum amplitude of the oscillometric blood flow waveform with Doppler-measured blood flow calculated with the diameters and blood velocities of the brachial arteries in 32 subjects who underwent diagnostic evaluations for peripheral arterial embolism. A linear correlation coefficient of r= 0.716 was found between the oscillometry- and Doppler-based blood flow measurements in the 32 subjects. These results suggest that blood flow passing through the brachial artery can be quantified non-invasively using the oscillometric approach after appropriate calibration.
©2009 by Walter de Gruyter Berlin New York
Artikel in diesem Heft
- Editorial note
- Welcoming address to the participants of the World Congress on Medical Physics and Biomedical Engineering (Munich, Germany, September 7–12, 2009)
- Research articles
- Investigation of ventricular cerebrospinal fluid flow phase differences between the foramina of Monro and the aqueduct of Sylvius / Phasendifferenzen zwischen den Liquorströmungen im Aquädukt und in den Foramina Monro
- Non-invasive determination of instantaneous brachial blood flow using the oscillometric method
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Artikel in diesem Heft
- Editorial note
- Welcoming address to the participants of the World Congress on Medical Physics and Biomedical Engineering (Munich, Germany, September 7–12, 2009)
- Research articles
- Investigation of ventricular cerebrospinal fluid flow phase differences between the foramina of Monro and the aqueduct of Sylvius / Phasendifferenzen zwischen den Liquorströmungen im Aquädukt und in den Foramina Monro
- Non-invasive determination of instantaneous brachial blood flow using the oscillometric method
- Direct measurement of myocardial oxygen tension and high energy phosphate content under varying ventilatory conditions in rabbits / Messung von myokardialem Sauerstoffpartialdruck und energiereichen Phosphaten unter verschiedenen Beatmungsbedingungen beim Kaninchen
- Simulations and experiments of the balloon dilatation of airway stenoses / Simulationen und Experimente zur Ballondilatation von Atemwegstenosen
- Sympatho-vagale Balance und kardiale Reaktionen bei standardisierten psychomentalen Belastungen / Sympatho-vagal balance and cardiac response to mental challenge
- Analysis of colour stability of selected provisional prosthetic materials: an in vitro study
- Der Einfluss der Makro- und Mikrostruktur auf die Benetzungs- und Retentionseigenschaften von Wurzelkanalstiften in vitro / The influence of macro- and microstructure on the surface wettability and retention properties of endodontic posts in vitro
- Pharmakafreisetzende biodegradierbare Polymerbeschichtung von dentalen Titanimplantaten zur Verbesserung der Weichgewebsintegration / Drug release of coated dental implant neck region to improve tissue integration
