The interpretation of trace element analysis in body fluids

Area of Science:

• Clinical Chemistry
• Toxicology
• Environmental Health

Background:

• Clinical interpretation of trace element analysis often lags behind technological advancements in measurement.
• Understanding the toxicokinetics of trace metals (accumulation and excretion) is essential for accurate interpretation.
• Trace element analysis has specific, valuable applications but is not suitable for broad patient screening.

Purpose of the Study:

• To clarify the appropriate clinical applications of trace element analysis.
• To highlight the challenges in interpreting trace element analysis results.
• To guide physicians on the judicious use of trace element testing.

Main Methods:

• Review of toxicokinetic principles related to trace elements.
• Analysis of specific applications where trace element testing is beneficial.
• Evaluation of the risks associated with misinterpretation and inappropriate treatment.

Main Results:

• Trace element analysis is most effective for establishing exposure levels, biological exposure indices, and biomonitoring of populations.
• It can confirm associations in compatible diagnoses but is poorly suited for individual patient screening.
• Inappropriate trace element testing can lead to unnecessary chelation therapy with potentially life-threatening side effects.

Conclusions:

• Trace element analysis should be employed sparingly and with a thorough understanding of its implications.
• Physicians must have a clear rationale and plan for utilizing test results before ordering.
• Accurate interpretation requires expertise in toxicokinetics to ensure patient safety and effective treatment.