IMPEDANCE MONITORS, ELECTRODE ARRAYS AND METHODS OF USE

摘要

A portable bioelectric impedance monitor for monitoring extracellular fluid levels includes a tetrapolar electrode array lead with four electrodes arranged sequentially and axially along the lead, and circuitry coupled with the at least four electrodes configured to measure bioelectric impedance extracellular fluid in a human subject at a frequency of less than 15 kHz. The electrodes are adhered to a human subject/patient on the patient's torso or one of the patient's limbs. One embodiment includes a Tetrapolar Analog Front End Patient Interface circuit configured to convert two electrode operation of a commercial Impedance Converter, Network Analyzer into a tetrapolar operation for excitation and impedance measurement of the human subject.

主权项

1. A device to monitor tissue hydration of a human subject, the device comprising:
at least four electrodes capable of physically adhering and electrically coupling to the human subject; and circuitry coupled to four of the at least four electrodes to measure a bioelectric tissue impedance of the patient at a frequency of less than fifteen kilohertz. (<15 kHz).