Summary
The infrared spectroscope, polarizing microscope and scanning electron microscope were used in the study of the composition and structure of urinary calculi. It was found that most calculi contained calcium oxalate, but none of them was pure. The nuclei of calcium oxalate-uric acid microcrystal type of calculi only consisted of pure uric acid without any matrix or other elements, indicating that the nuclei are probably formed first by precipitation, crystallization and aggregation of uric acid, and then deposition of calcium oxalate is induced. Foreign bodies in calcium oxalate calculi were mostly necrotic tissues with a large amount of apatites, which is most probably due to bacterial infection of the urinary tract.
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Xi-zhao, S., Yong-shang, Z. Studies on the composition and structure of urinary calculi by infrared spectroscopy, polarizing microscopy and scanning electron microscopy. Acta Academiae Medicinae Wuhan 6, 104–108 (1986). https://doi.org/10.1007/BF02861658
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DOI: https://doi.org/10.1007/BF02861658