Cystinuria calculator

swissnephrokalk Cystinuria (.xlsx)

Instructions for use (.pdf)

Influencing the amount and concentration of cystine in the urine plays a central part in the treatment of patients with cystinuria. These values are expressed in different ways by different labs and investigators.
The Cystinuria sheet allows easy conversion between some of the commonly found units. In addition the necessary urine volume to achieve a supersaturation ratio below 1 and the expected effects of cystine binding thiol drugs can be calculated (see instructions).
Feedback and corrections are welcomed in the comment section, by twitter or via email (

swissnephrokalk Cystinuria