Abstract
Blood pressure is a determinant of blood flow, and is the sum of hydrostatic and dynamic
pressures. Intravascular pressures can be measured directly using intravascular pressure
sensors, or with external transducers connected by a fluid column. Early pressure
transducers consisted of wire strain gauges, but these have been superseded by semiconductor
devices, which have become increasingly mass-produced and miniaturized, using production
techniques common in microelectronics. Performance of pressure-monitoring systems
is affected by physical factors including resonance and damping. This article examines
the physical principles that underlie transducer design and function, and the sources
of error and inaccuracy.
Keywords
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Article Info
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Copyright
© 2011 Elsevier Ltd. Published by Elsevier Inc. All rights reserved.
