METHOD AND DEVICE FOR MEASURING BIOLOGICAL TISSUE PARAMETERS Russian patent published in 2002 - IPC

Abstract RU 2190994 C2

FIELD: medicine; medical engineering. SUBSTANCE: method involves periodically acting upon the object under measurement with electric power and measuring in pauses between actions of electric power of short-circuited electrodes set on skin. The acting electric power magnitude is increased to a value at which the electric current in pauses reaches a predefined value and electric power values that, when acting, supports given value of electric current passing through the biological tissue during pauses and transient process parameters of its formation are used as information parameters describing biological tissue properties. The device has active and indifferent electrodes, electric current-voltage converter, one input of which is connected to the indifferent electrode via electronic switch unit which control output is connected to impulse shaper, electric voltage source, register, the first and the second electronic switch units which control inputs are connected to impulse shaper, amplifier, low frequency filter. The electric voltage source is controllable and its control inputs are connected to low frequency filter outputs and electric current-voltage converter output is alternatively connected to multiplier or comparator unit via the first switch. Voltage by means of which electric current through biological tissue is set in pauses between actions with electric power is supplied to the second input of the comparator unit. The amplifier and low frequency filter connected in series are connected to the output of the comparator unit. The second input of the multiplier unit is connected to the active electrode, its output being connected to the recorder. Switch control is carried out in a way that the signals coming from the active electrode and electric current-voltage converter are delivered to the multiplier unit at the same time. EFFECT: improved reproducibility of measurement results; reduced dependency on psychic factors, environment temperature and humidity. 2 cl, 1 dwg

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RU 2 190 994 C2

Authors

Gusev V.G.

Mirin N.V.

Mirina T.V.

Dates

2002-10-20Published

1998-04-21Filed