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Piezoelectric effect in renal calculi.

V R Singh¹, R Agarwal, V Singh

¹National Physical Laboratory, New Delhi, India.

IEEE Transactions on Bio-Medical Engineering

|February 1, 1991

Summary

The piezoelectric effect was observed in kidney stones, with alpha quartz identified as a key factor. This study details the dielectric and piezoelectric properties of renal calculi.

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Area of Science:

Materials Science
Biophysics
Geochemistry

Background:

The piezoelectric effect, the ability of certain materials to generate an electric charge in response to applied mechanical stress, is well-documented in various crystalline structures.
Renal calculi (kidney stones) are complex biological composites, and their physical properties, particularly their electrical behavior, remain largely unexplored.

Purpose of the Study:

To investigate the piezoelectric effect in renal calculi for the first time.
To identify the crystalline components responsible for this effect.
To characterize the dielectric and piezoelectric parameters of kidney stones.

Main Methods:

Renal calculi samples were prepared in solid and powdered (pressed into tablets) forms.
X-ray diffraction techniques were employed to identify crystalline phases, specifically searching for alpha quartz.
Dielectric measurements and piezoelectric parameter analysis were conducted on the prepared samples.

Main Results:

The piezoelectric effect was successfully demonstrated in renal calculi samples.
The presence of alpha quartz was confirmed in the kidney stones.
Alpha quartz was identified as a significant contributor to the observed piezoelectricity.
Detailed dielectric and piezoelectric parameters were measured and analyzed.

Conclusions:

Renal calculi exhibit piezoelectric properties, a novel finding.
The presence of alpha quartz is a key factor explaining the piezoelectric effect in kidney stones.
This research opens new avenues for understanding the physical characteristics of kidney stones and potential applications.

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