Microprocessors are now being developed for the electrocardiographic analysis and echocardiography. Both 8-bit (Intel) and 16-bit (DEC LSI-ii) systems are currently being used. With completion of these developments, we anticipate that the throughput of experiments involving limited testing will be increased by 200-300%; that of experiments in which a full complement of tests are run may be increased by 500600%. Summary We have described a system of relative complexity, designed to provide measurement capability for a wide variety of physiological parameters. This system has been designed to special requirements imposed by limiting measurements to those which are non-invasive and limiting exposures to those likely to produce marginal effects. Both hardware arrangements and user software have been designed to provide maximum accuracy of measurement, in anticipation of subsequent extensive use of statistical analyses. In actual use, it has been noted that there is a special problem created by the test procedure times encountered in studies in these facilities. The time consumed in such tests limits the throughput (and therefore the usefulness) of the entire facility. The use of analog preprocessing circuitry and digital microprocessors to alleviate this problem is under development. In the meantime, the facilities are being used
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