DEVICE FOR EVALUATING BIOELECTRICAL ACTIVITY OF ACUPUNCTURE POINTS Russian patent published in 2003 - IPC

FIELD: medical engineering. SUBSTANCE: device has measuring and base electrode making contact with biological object acupuncture points, voltage amplifiers, low frequency filter and recording instrument as well as additionally introduced separating capacitors, differential amplifier, automatic switch, multivibrator, balanced mixer and sequentially connected narrow band amplifier tuned to multivibrator switching frequency and synchronous detector. The electrodes are connected to differential amplifier inputs the outputs of which are connected to voltage amplifier inputs. Output of one of them is connected to one input of balanced mixer, direct and inversed outputs of the other amplifier are connected to the second input of the balanced mixer connected to narrow band amplifier input with its output. Control inputs of the automatic switch unit and synchronous detector are connected to multivibrator outputs. The synchronous detector output is connected to recording instrument via low frequency filter. EFFECT: high reliability in measuring electric resistance of biological object areas. 1 dwg