[Laboratory methods of predicting primary and recurrent nephrolithiasis].

Area of Science:

• Urology
• Nephrology
• Biochemistry

Background:

• Urolithiasis, or kidney stone disease, affects a significant portion of the population, with recurrence being a common challenge.
• Understanding the biochemical and crystallographic factors in urine is crucial for predicting and preventing stone formation.

Purpose of the Study:

• To identify key urine parameters associated with the risk of primary and recurrent nephrolith formation.
• To evaluate the correlation between specific ion concentrations, acid levels, crystal properties, and urease activity in urolithiasis patients.

Main Methods:

• Analysis of urine samples from 40 urolithiasis patients and 40 patients with recurrent nephroliths.
• Measurement of sodium (Na), potassium (K), calcium (Ca) ion concentrations, oxalic and uric acids, total calcium, and phosphorus (P).
• Assessment of urease activity, crystal formation ability, crystallization speed, crystal chemical composition, and urine pH stability.

Main Results:

• Fast or moderate crystallization speed was identified as a risk factor.
• High urease activity and a high ability to form crystals were strongly correlated with stone formation.
• Unstable urine pH was a significant indicator of increased risk for both primary and recurrent nephrolithiasis.

Conclusions:

• Urine pH instability, rapid crystallization, and high urease activity are critical markers for predicting nephrolithiasis risk.
• These findings can inform targeted prevention strategies for patients susceptible to kidney stones.
• Further research into modulating these factors could lead to novel therapeutic interventions.