Pilot study of the qualitative analysis of urinary stones by near infrared spectroscopy and chemometrics

Urolithiasis is one of most common urogenital diseases. Its diagnosis and treatment require an efficient analytical method of determination of chemical composition of a urinary stone, ideally, during the surgery. Near infrared spectroscopy seems to be a promising method for intraoperative qualitative analysis of urinary stones (calcium oxalates, uric acid, etc.), providing fast measurements and portable equipment. In this work, the results of a pilot study of analyzing several urinary stones with different chemical composition (dry and soaked in saline) within the 939-1799 nm range are presented. The Principal Component Analysis results confirm the potential of this technique in qualitative analysis of urinary stones before their surgical removal.