Research Article
FT-IR Analysis of Urinary Stones: A Helpful Tool for Clinician Comparison with the Chemical Spot Test
Table 5
Agreement between results obtained with chemical spot test and FT-IR in the mixed stone group.
| | Mixed stones | | Substances detected () | Agreement () | Partial agreement () | Disagreement () |
| | Anhydrous uric acid + calcium oxalate monohydrate (3) | 2 | 0 | 1 | | Calcium oxalate monohydrate + calcium oxalate dihydrate + carbonate apatite (4) | 0 | 2 | 2 | | Magnesium ammonium phosphate + carbonate apatite + calcium oxalate monohydrate (1) | 0 | 0 | 1 | | Carbonate apatite + magnesium ammonium phosphate + protein (1) | 0 | 0 | 1 | | Anhydrous uric acid + calcium oxalate monohydrate + carbonate apatite (1) | 0 | 0 | 1 | | Anhydrous uric acid + dihydrate uric acid (2) | 1 | 0 | 1 | | Carbonate apatite + calcium oxalate monohydrate + calcium oxalate dihydrate (3) | 0 | 0 | 3 | | Calcium oxalate monohydrate + carbonate apatite (2) | 0 | 1 | 1 | | Calcium oxalate monohydrate + calcium oxalate dihydrate (1) | 0 | 1 | 0 | | Calcium oxalate dihydrate + carbonate apatite + protein (1) | 0 | 0 | 1 |
| | Total (19) | 3 (15.8%) | 4 (21.0%) | 12 (63.2%) |
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