A method to diagnose urinary lithiasis at an early stage has been devised by Wei Hang and colleagues in Xiamen, China. The method can also distinguish between the different types of stone, which is important when considering treatment options.
Currently, distinguishing between types can only be done after the stones have been removed from a patient, making it difficult to prescribe a treatment.
Urinary lithiasis, stones in the lower urinary tract, has become more common, with about 100,000 new cases each year. It causes substantial pain and leads to renal failure. The stones are caused by a build up of organic materials and inorganic crystals.
The team’s diagnostic method uses elemental analysis on blood serum samples to detect the levels of barium, gallium, antimony and sodium; variations from the norm are linked to the appearance of stones. The test subjects could then be subdivided into calcareous and non-calcareous stone patients by metallomic profiling, and the team found that selenium levels play a major role in this classification.
Compared with urine samples, blood serum samples show smaller variability under normal physiological conditions so are a better choice for elemental screening, say the researchers.
Early diagnosis of urinary lithiasis via elementary profile of serum samples
Yao Gao, Ning Yang, Xiaomei Yan, Wei Hang, Jinchun Xing, Jiaxin Zheng, Eryi Zhu and Benli Huang
Anal. Methods, 2012, Advance Article
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