CARDIOGRAPH Russian patent published in 1997 - IPC

FIELD: medical engineering; express-diagnostics of cardiovascular system. SUBSTANCE: cardiograph has unit which separates AC component of cardiosignal. This unit enables simultaneous measurement of cardiosignal in all branches with subsequent indication on liquid-crystal display for three selected synchronous cardiosignals. Cardiograph has buffer amplifiers, commutator of branches, differential amplifier, analog-to-digital converter three control registers, microprocessor controller, display controller, and liquid-crystal display. AC component separation unit is connected between differential amplifier output and sealer input. Unit includes set of capacitors. Combined first plates of capacitors serve as unit input, and second capacitor plates are connected to inputs of second commutator the output of which is connected to common bus through switch and resistor parallel-connected to it. Second commutator output serves as unit output. Control of second commutator and switch is effected from control register the inputs of which are connected to data bus of microprocessor controller. EFFECT: extended functional capabilities of instrument. 3 dwg