Trace element investigations in kidney stone patients

Area of Science:

• Geochemistry
• Clinical Chemistry
• Toxicology

Background:

• Kidney stones (concrements) can contain various trace elements.
• Understanding the relationship between stone composition and systemic trace element levels is important for patient health.
• Previous research has explored trace element involvement in stone formation.

Purpose of the Study:

• To analyze the trace element composition of kidney stones.
• To investigate correlations between trace elements in kidney stones and in patients' blood, urine, and hair.
• To identify specific trace elements associated with different types of kidney stones.

Main Methods:

• Atomic absorption spectroscopy was used to analyze 31 different trace elements in 24 kidney stones.
• Blood, urine, and hair samples from stone patients were analyzed for trace element concentrations.
• Trace element content was compared between kidney stones and biological samples.

Main Results:

• Calcium stones showed significant levels of Iron (Fe), Lead (Pb), Strontium (Sr), and Zinc (Zn).
• Organic stones contained significant Arsenic (As), Fe, and Zn.
• No correlation was observed between trace element concentrations in kidney stones and in the patients' blood or urine.
• A patient with high Arsenic (As) in her kidney stone had normal Arsenic (As) levels in her hair.

Conclusions:

• The trace element composition of kidney stones does not appear to correlate with systemic levels in blood or urine.
• Specific trace elements like Fe, Pb, Sr, Zn, and As are found in different types of kidney stones.
• Further research is needed to understand the role of these trace elements in kidney stone formation and patient health.