[Significance of the electric current characteristics used in rheography. Study on the relationship between frequency, voltage and intensity of the current with reference to impedance values of the body mass].
Impedance variations of corporeal segments were evaluated in relation to the variations in current frequency and intensity using a tetrapolar measuring apparatus. The results appear to confirm the reliability of the technique and, on the basis of the study of current transmission in the segment, it is suggested that frequencies between 70 and 240 KHz. particularly around 140 KHz, are the most suited to this type of measurement.
D004568:Electrodiagnosis / Q000295:instrumentation / Q000379:methods*; D006801:Humans; D007866:Leg / Q000098:blood supply; D010992:Plethysmography, Impedance / Q000295:instrumentation / Q000379:methods*
L'importanza delle caratteristiche della corrente impiegata in reografia. Studio dei rapporti tra frequenza, tensione ed intensità della corrente applicata, rispetto ai valori di impedenza di un segmento corporeo