Hedelin H, Eddeland A, Larsson L, Pettersson S, Ohman S
Br J Urol. 1984 Jun;56(3):250-4. doi: 10.1111/j.1464-410x.1984.tb05382.x.
The composition of encrustations precipitated on long-term indwelling urethral catheters was analysed using a newly developed wet chemical method that allows determination of small sample volumes. In contrast to earlier studies, the major portion of the encrusted material could be identified; ammonium magnesium phosphate and calcium phosphates (brushite and apatite) were the major components. The effect of allopurinol was also investigated and it was found to decrease significantly the amounts of urate and calcium phosphate but not to lower significantly the total amount of material precipitated on the catheters.
采用一种新开发的湿化学方法对长期留置尿道导管上沉淀的结痂成分进行了分析，该方法能够测定少量样本。与早期研究不同的是，可以识别结痂物质的主要部分；磷酸铵镁和磷酸钙（透钙磷石和磷灰石）是主要成分。还研究了别嘌呤醇的作用，发现它能显著减少尿酸盐和磷酸钙的量，但不能显著降低导管上沉淀物质的总量。
