Figure 1. a) Macroscopic image of the 57 bladder stones obtained after cystolithotomy. b) Internal aspect of longitudinal section. (**: Quasi giant; * Smaller)
The 57 calculi presented (Figure 1a) were extracted using cystolithotomy and sent to the laboratory for analysis, which was performed using infrared spectroscopy (IRS) (Spectrum Two (Perkin Elmer SL, Madrid, Spain).
Among the existing analytical methods, IRS has been reported as one of the most reliable methods due to its ability to detect inorganic and organic material (cystine/uric/salts)1. IRS provides the spectra of the components which are present in the fragment analyzed and their comparison with a spectral baseline library.