| 摘要 |
PROBLEM TO BE SOLVED: To simplify the circuit structure by determining first to third biological electric impedance values by use of alternating currents having three kinds of frequencies, determining the impedance vector track on the basis of these measurement values, and determining the biological electric impedance values in zero frequency and infinite frequency. SOLUTION: In the measurement of biological electrical impedance between the hand the foot of a subject, the identification number, distinction of sex, height and weight of the subject are inputted. An AC output is applied from an AC signal output device 21 to the subject through electrodes 50, 51, and the current carried in the subject is detected by a reference current detection device 22. The potential difference between measuring terminals 32, 33 connected to the electrodes 52 and 53, respectively, is determined by a potential difference detecting device 25. Such a procedure is performed for alternating currents having three kinds of frequencies, and the impedance vector track is determined on the basis of first to third biological electric impedance values determined thereby to determine the biological electric impedance values in zero frequency and infinite frequency. |
