FOUR-ELECTRODE UNIT FOR READING CARDIO-RESPIRATORY PARAMETERS OF BIOLOGICAL OBJECT Russian patent published in 2006 - IPC A61B5/205 

FIELD: medical equipment; veterinary equipment.

SUBSTANCE: device is used for measurement of volumetric parameters of breathing and electrocardiogram by methods of impedance pneumography and electrocardiography. Device is intended for physiological testing under natural conditions of life and activity of patient - at work, in sports, at home as well as at checking of natural conditions of maintenance and existence of animals. Device has two generator and two signal electrodes, stable ac generator and two filters. First filter is intended for selecting cardiographic signal and the second one - for selecting respiratory signal. Stable ac generator is made with symmetrical differential output. Two T-shaped units are introduced into circuit of connection of mentioned generator with generator electrodes. Two resistors, connected in series, of first and second T-shaped unit are connected to circuit of connection of first (second) generator electrode with output of generator. Passive member (resistor or inductance) of any T-shaped unit is connected between point of connection of two resistors from the unit and case of device. Four dischargers and two resistors are additionally introduced into four-electrode device.

EFFECT: improved noise immunity for co-phase error: widened area of application.

4 cl, 2 dwg