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A data acquisition system for clinical research.

S W Bledsoe, G Bashein, S T Momii

    Journal of Clinical Monitoring
    |July 1, 1987
    PubMed
    Summary
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    This study presents a novel system for collecting physiological data during clinical research. The system efficiently synchronizes multiple variables, reducing processing time and costs for improved data acquisition.

    Area of Science:

    • Biomedical Engineering
    • Clinical Data Acquisition

    Background:

    • Traditional methods for collecting physiological variables in clinical settings present challenges in data synchronization and processing efficiency.
    • Existing systems often lack the flexibility to adapt to diverse clinical study requirements and can be costly.

    Purpose of the Study:

    • To develop and validate a cost-effective, portable system for automatic collection and synchronization of multiple physiological variables during clinical investigations.
    • To address limitations in data handling, processing time, and unobtrusiveness associated with current physiological data acquisition methods.

    Main Methods:

    • An eight-track instrumentation tape recorder forms the core of the system, digitizing and compressing slowly changing variables onto a single track.
    • Simultaneous analog recording preserves original data, while verification is achieved through analog chart recording and numerical video display.

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  • Off-line computer processing is accelerated by utilizing faster tape playback speeds compared to recording speeds.

    • Main Results:

    • The system successfully digitized and synchronized multiple physiological variables, overcoming limitations in available tape tracks.
    • Data acquisition was reliably verified using both analog and digital monitoring methods.
    • Computer processing time was reduced by at least twofold, and the system proved unobtrusive and portable in a study involving over 80 cardiac surgery patients.

    Conclusions:

    • The developed system offers an efficient, cost-effective, and reliable solution for physiological data collection in clinical research.
    • Its design facilitates enhanced data management, reduced processing overhead, and adaptability across various clinical study designs.
    • The system's successful application in a patient cohort demonstrates its practical utility and robustness in demanding clinical environments.