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ON TISSUE IMPEDANCE MEASUREMENT

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The measuring procedure is quick, reproducible, non-destructive and allows easy statistical analysis.

Plain English Summary

Summary written for general audiences

Biological tissues were immersed in a physiological solution and enclosed in a four-electrode measuring cell where an input signal was applied to current electrodes and the output signal was obtained from voltage electrodes. The unknown impedance was computed from the input and output signals, and the volume impedance of the tissue was finally obtained after deriving component values of an equivalent electrical network.

Why This Matters

The experimental set-up was carefully shielded from external noise and the amplifier required a wide bandpass because of the very small sampling rate (+ .5 us). Data storage, conversion, and transmission to a CDC 6600 computer were performed by a microcomputer, enabling a complete measurement including computation in a few minutes. The program computed the best z-transform transfer function using an instrumental variable algorithm for a user-defined number of poles, then computed the continuous Laplace s-transform taking the sampling rate into account.

Cite This Study
Unknown (n.d.). ON TISSUE IMPEDANCE MEASUREMENT.
Show BibTeX
@article{on_tissue_impedance_measurement_g5511,
  author = {Unknown},
  title = {ON TISSUE IMPEDANCE MEASUREMENT},
  year = {n.d.},
  
  
}
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Quick Questions About This Study

Biological tissues were immersed in a physiological solution and enclosed in a four-electrode measuring cell.
The unknown impedance was computed from the input and output signals, with data processing accounting for noise and quantization error.
The measuring procedure was quick, reproducible, non-destructive and allowed easy statistical analysis.
Data storage, conversion, and transmission to a CDC 6600 computer were performed by a microcomputer, enabling rapid data transfer and a complete measurement in a few minutes.