To explore the composition of urinary stones in the eastern Shandong region of China and discuss its clinical significance.
A total of 3684 specimens of urinary calculi from the eastern Shandong region were collected in our study. Compositions of stones were analyzed by Automatic Infrared Spectrum Analysis System (type LIIR-20). The results were verified through manual analysis of the spectrogram which is accompanied by polarizing microscopy and chemical analysis if necessary.
Among the 3684 specimens, there were 1767 single-component stones and 1917 mixed-component stones. According to the difference of the main components of the stones, the stones can be divided into the following types: calcium oxalate monohydrate stones (1779, 48.29%), anhydrous uric acid stones (1105, 29.99%), carbonate apatite stones (590, 16.02%), ammonium magnesium phosphate hexahydrate stones (143, 3.88%), calcium oxalate dehydrate stones (36, 0.98%), and cystine stones (31, 0.84%).
There are relatively many uric acid stones in the eastern Shandong region of China. The automatic infrared spectrum analysis system for calculus has the advantages of accuracy and convenience.