Abstract
Radio telemetry of biological parameters has been used for over 25 years, and many designs, both simple and complex, have been published in journals and books (Jeutter, 1983; Mackay and Jacobson, 1957; Mackay, 1970; Matsumoto and Kimmich, 1980). Fields as diverse as wildlife tracking, using simple transistor oscillators, and multichannel physiological measurement implants employing thick film microcircuits have been covered. Companies specializing in making this type of equipment have risen and fallen. Despite this, the routine use of this medium as a research tool is still not as widespread as one might imagine. The small number of companies currently marketing suitable equipment is witness to this fact. As a result of this, we set out to design a relatively simple, reproducible, and inexpensive equipment to monitor systemic blood pressure in unrestrained conscious dogs, continuously over 24 hr or more. Continuous recording of this duration generates so much information that it is impractical to analyze the data manually. To measure both systolic and diastolic blood pressure, and to measure details of the electrocardiogram timings, would take many times the length of the actual experiments. A real time computer-based data reduction system was therefore designed to complement the radiotelemetry.
Published Version
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