First-Line Conservative Treatment of Cystinuria
Cystinuria requires a coordinated first-line conservative strategy to reduce urinary cystine load and modify the urinary environment. The protocol specifies concurrent measures targeting both cystine concentration and urinary pH across the full 24-hour period.
Clinical Goals
Maintain urinary cystine concentration below 250 mg/l and sustain urinary pH within the target alkaline range — with patients actively self-monitoring pH throughout the day and night.
Treatment Approach
The first-line regimen combines fluid intake adjustment, targeted dietary modifications, and urinary alkalinization as its cornerstone — all applied together as a coordinated conservative strategy. The complete structured protocol specifies the precise parameters, dietary targets, and dosing framework for each component.
References
DOI: 10.1016/j.kint.2020.06.035
- Fluid intake should guarantee a urine output large enough to maintain a cystine concentration of <250 mg/l (1 mmol/l) during 24 hours.
- In most adults, at least 3 l of urine output per 24 hours are required.
- To increase cystine solubility, alkalinization should be a cornerstone of treatment for all patients.
- All patients should self-monitor urinary pH to maintain values between 7.5 and 8.
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