PORTABLE COMPOSITIVE SYSTEM FOR NONINVASIVE AND AMBULATORY MONITORING OF CARDIOVASCULAR VARIABLES.

Ken ichi Yamakoshi, A. Kawarada, M. Hosoya, S. Tanaka, M. Shibata, J. Ando, A. Kamiya, H. Shimazu, M. Fukuoka, H. Ito

Research output: Contribution to journalConference article

Abstract

A portable compositive system for the noninvasive monitoring of cardiac output (CO), arterial blood pressure (BP) and e. c. g. of the unconstrained subject is described. The system consisted of a measuring unit, recording unit, and data processing and analysing unit, the former two units being taken with a subject. The measuring unit was composed of two parts; one is for obtaining the first derivative of the transthoracic admittance variations (dY/dt) and e. c. g. using tetrapolar admittance cardiography, and the other for detecting the photoplethysmographic pulsations (PG) in the finger following the application of counterpressure (cuff pressure; P//c). The former one can measure CO based on the Kubicek's method, while the latter can determine the indirect BP based on the volume-oscillometric method. A portable 4-ch cassette data recorder was used to record the output signals from the measuring unit.

Original languageEnglish
Pages (from-to)304-305
Number of pages2
JournalJapanese Journal of Medical Electronics and Biological Engineering
Volume22
Publication statusPublished - 1984 Apr 1

ASJC Scopus subject areas

  • Biomedical Engineering

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    Yamakoshi, K. I., Kawarada, A., Hosoya, M., Tanaka, S., Shibata, M., Ando, J., Kamiya, A., Shimazu, H., Fukuoka, M., & Ito, H. (1984). PORTABLE COMPOSITIVE SYSTEM FOR NONINVASIVE AND AMBULATORY MONITORING OF CARDIOVASCULAR VARIABLES. Japanese Journal of Medical Electronics and Biological Engineering, 22, 304-305.