[Urinary excretion of emulsified lipids in urolithiasis]

Examinations of the urine emulsified lipid phospholipid composition carried out by thin-layer chromatography have revealed that phospholipid excretion is the minimal in normal subjects and is represented only by sphingomyelin and phosphatidylcholine fractions. In subjects with a history of cholelithiasis (CL) phospholipid excretion is essentially elevated and the total phospholipid spectrum, including the minor fractions, is present in the urine. In CL patients phospholipiduria+ is still more marked, phosphatidylethanolamine appears in the urine, that is absent in the other groups of examinees. This method is recommended for the early diagnosis of CL.