A data acquisition system for clinical research
Journal of Clinical Monitoring and Computing(1987)
摘要
We developed a system for automatic collection and synchronization of multiple physiological variables during clinical investigations.
Centered around an eight-track instrumentation tape recorder, the system solves several problems encountered in gathering
this type of research data: (1) slowly changing variables are digitized and compressed onto a single track by recording them
in one serial message, allowing for recording many more variables than there are tape tracks available; (2) simultaneous analog
recording allows retention of original data for variables that may be processed subsequently by multiple schemes; (3) data
acquisition is verified with both analog chart recording and numerical video display monitors; (4) off-line computer processing
time is decreased at least twofold by using tape playback speeds faster than the recording speed; (5) cost is kept low by
using an inexpensive 1/4-inch (0.64-cm) tape medium and dedicated microcomputers; and (6) the system is unobtrusive, portable,
and easily reconfigured for different clinical studies. It proved to be reliable in a study of more than 80 patients undergoing
cardiac surgery.
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关键词
data acquisition system,data acquisition,clinical research
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