Importance comparative respective de l'analyse infra rouge et de l'analyse chimique classique dans le diagnostic etiologique de la lithiase urinaire

ABSTRACT

Analysis of the nature of calculi provides a valuable mean for the differential diagnosis of urinary lithiasis. In this work, we report a comparative study of the nature of 31 calculi performed by infra red and the classical chemical techniques. Our results showed that the chemical techniques give false positives for the struvite, whewellite and false negatives for the weddellite, the amorphus calcium phosphate, the whitlockite, the ammonium urate, the uric acid and the proteins 83,9% of the cases assessed clinically were not confirmed by the infra red analysis. We concluded that the chimical techniques are not inacurate and not adapted to the study of the chemical nature of urinary calculi