| Stone type . | Urine acidity . | Mean urine pH (± SEM) . |
|---|---|---|
Calcium oxalate | Variable | 6 (± 0.4) |
Calcium phosphate | Tendency towards alkaline urine | >5.5 |
Uric acid | Acid | 5.5 (± 0.4) |
Struvite | Alkaline* | – |
Cystine | Normal (5–7) | – |
| Stone type . | Urine acidity . | Mean urine pH (± SEM) . |
|---|---|---|
Calcium oxalate | Variable | 6 (± 0.4) |
Calcium phosphate | Tendency towards alkaline urine | >5.5 |
Uric acid | Acid | 5.5 (± 0.4) |
Struvite | Alkaline* | – |
Cystine | Normal (5–7) | – |
Urine pH must be above 7.2 for deposition of struvite crystals.
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