[The characteristics of ureteral lithiasis]. / Niakoi aspekti ot kharakteristikata na ureternata litiaza.

The study covers 2630 patients with ureteral concrements, eliminated operatively, through extracorporeal lithotripsy (ESWL), or spontaneously as the result of drug treatment. Attention is called to the left-side location of ureteral concrements, regardless of the mode of elimination, with the clinical symptomatology of the disease being comprehensively discussed. Clinical and chemical characterization of ureteral concrements (type, size and the like) is also done separately with a special reference to the method of removal employed. In concrements eliminated spontaneously a correlative dependence with the annual season is sought; in the winter months a rather elevated frequency of elimination is recorded, irrespective of the type of concrements.

[The surgical and spontaneous elimination of kidney calculi--the type, incidence and treatment]. / Operativno i spontanno eliminirani bubrechni konkrementi--vid, chestota i lechenie.

Results are reported of chemical (derivatographic and polarization microscopic) analysis of 2630 calculi removed by operation and 8607 spontaneously eliminated calculi. It was found that 82.7 per cent of the calculi removed by operation and 19.4 per cent of those eliminated spontaneously were mixed--composed of two or more components. The most common "pure" concrements were composed from oxalates and uric acid. The difference in the chemical types of the renal calculi of the two compared groups (removed by operation and spontaneously) is shown and followed up. Of interest is the different incidence of the two calcium oxalate hydrates in the two compared groups of renal calculi. Vevelite was more common in calculi removed by operation, while vedeline was the more common form in spontaneously eliminated calculi. Precision of the chemical form of the calculosis is recommended, with a view to including the genesis of stone formation for effective prophylaxis, treatment and metaphylaxis of the disease.