BIOIMPEDANCE SPECTROGRAPHY SYSTEM AND METHOD

摘要

A device and method for bioimpedance spectrography is corrected for breathing artefacts. A breathing signal is used in conjunction with the impedance signal to adjust for the time within the respiratory cycle at which the measurements are made. The correction allows the device to characterize tissue parameters accurately with fewer measurement points.

主权项

1. A bioimpedance spectrography system comprising:
a bioimpedance measurement system comprising: a current source for applying an ac current to a user's body tissue; a reading arrangement for reading a voltage from the body tissue; a controller for varying the frequency of the ac current applied to the body tissue; a processor for deriving a frequency-dependent impedance function from the applied current values and the read voltages; and a breathing monitor for monitoring or deriving a breathing pattern of the user, wherein the processor is further for processing a tissue characterisation function, the monitored or derived breathing pattern and the frequency-dependent impedance function in order to correct the tissue characterisation function to take account of the point in time of the respiratory cycle at which the voltages are read and to derive tissue parameters.