[Hokkaido igaku zasshi] The Hokkaido journal of medical science
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Hokkaido Igaku Zasshi · Nov 1991
[Clinical evaluation of arterial tonometry for noninvasive, continuous blood pressure monitoring during anesthesia].
A new continuous, non-invasive arterial blood pressure monitoring system based on arterial tonometry was currently developed. A sensor of this system consists of an array of 15 piezoresistive pressure transducers. An automatic sensor positioning system ensure that at least one of the 15 transducers is positioned on the center of the pneumatically flattened, but not occluded, portion of the artery. ⋯ These results indicate that tonometry provides accurate, reliable and real-time blood pressure measurements together with continuous display of the pressure waveform for wide range of blood pressure. It was concluded that this system may replace the conventional invasive intra-arterial blood pressure monitoring system. This system is especially useful if it is combined with pulse oximetry and capnography.