Patient selection: age from 18 to 86 years of age
Parameters:
(1) impedance at 50 kHz in Ohms
(2) impedance at 250 kHz in Ohms
(3) impedance at 5 kHz in Ohms
(4) height in centimeters
(5) sex
impedance index at 50 kHz =
= ((height)^2) / (impedance)
ALM in kg in male =
= (0.6947 * ((height)^2) / (impedance at 50 kHz)) - (55.24 * ((impedance at 250 kHz) / (impedance at 5 hHz)) - (10940 / (impedance at 50 kHz)) + 51.33
ALM in kg in female =
= (0.6144 * ((height)^2) / (impedance at 50 kHz)) - (36.61 * ((impedance at 250 kHz) / (impedance at 5 hHz)) - (9332 / (impedance at 50 kHz)) + 37.91
where:
• In the human body reactance is less than 10% of resistance and the correlation between impedance and resistance is > 0.99. Therefore, the impedance index and resistance index at 50 kHz are interchangeable.
