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Updated: Sep 29, 2025

Estimation of Urinary Nanocrystals in Humans using Calcium Fluorophore Labeling and Nanoparticle Tracking Analysis
Published on: February 9, 2021
[Chemical composition analysis of 649 urinary stones]
Rodrigo Sánchez1, Pablo Navarro2, María Pía Troncoso1
1Universidad Finis Terrae, Santiago, Chile.
Background:
Chemical composition analysis of urinary stones is a fundamental part of the metabolic workup of urolithiasis.
Aim:
To report the chemical composition of urinary stones using infrared spectroscopy.
Material And Methods:
The chemical composition of rinary stones recovered from 649 patients aged 1 to 97 years (68% males), were analyzed using a Perkin Elmer FTIR Spectrometer, Spectrum Two.
Results:
Calcium oxalate monohydrate was the most common composition found in 45% of cases, followed by mixed composition, which included three ammonium phosphate stones in 29% of cases. Pure uric acid composition was found in 16% of stones. Three cystine stones were detected.
Conclusions:
These findings do not differ from those found in developed countries.
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