| 摘要 |
A dilution technique for measuring fluid flow rate within a circulating fluid system is disclosed, comprising continuous processing of a response signal following injection of an injectate into the fluid system, the process being terminated at a cut off point which is determined in terms of the peak of the response signal. The cut off point of the response signal is determined to compensate for error normally introduced due to recirculation. Apparatus is disclosed for carrying out the steps of the process, comprising an integrator-divider for processing the response signal, a peak detector and comparator for terminating the signal processing at the cut off point, and a lock in amplifier to hold the computed result during the period of recirculation. The method and apparatus for particularly applicable to thermal dilution and dye dilution measurements of blood flow rate.
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