AI Article Synopsis
- The study analyzes various measurement combinations of blood pressure, flow, and diameter using transmission-line theory, identifying only nine combinations that can yield the attenuation coefficient (gamma), reflection coefficient (R), and characteristic impedance (Z0) all at once.
- At least one measurement of blood pressure is necessary for these combinations to work.
- This research provides general equations for these measurements and offers simplified methods, improving practicality and versatility in measurement approaches.
Article Abstract
All possible combinations of four measurements of blood pressure, blood flow and vascular diameter are examined by transmission-line theory. It is found that only nine measurement combinations can give the attenuation coefficient gamma, reflection coefficient R and characteristic impedance Z0 simultaneously. At least one pressure measurement must be included. Their general expressions with arbitrary measuring locations are presented, together with some simplified forms which cover all the previous methods. A greater choice of method is thereby made available for use in practice. The results show that, regardless of the measurement locations, all combinations can be solved in the order gamma first, R second and Z0 last.
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| http://dx.doi.org/10.1016/0141-5425(93)90074-9 | DOI Listing |
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