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Bioelectrical Impedance Analysis

The BCAⅡ Body Composition Analyzer (BCAⅡ, TFHT, Beijing, China) is a segmental impedance device measuring the voltage drop in the upper and lower body. Measurements were undertaken by a single trained observer. The participant stood on the device while it measured body weight, and age, height and sex were entered on the touch screen. The BCAⅡ uses eight tactile electrodes,contacting the subject at various locations on the hands and feet. This detects the amount of segmental body water. The technique uses multiple frequencies to measure intracellular and extracellular water separately. The frequency of 50 kHz is used to measure extracellular water while frequencies above 200 kHz is used to measure intracellular water. Segmental analysis can calculate slight differences by sex, age without using empirical estimation.  


Tongfang Health Technology (Beijing) Co.,Ltd