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Pseudohyperphosphatemia in a hyperphosphatemic hemodialysis patient
Elliot J Suchin1, Borut Cizman, Bernadette R Connolly
1Renal-Electrolyte and Hypertension Division, Hospital of the University of Pennsylvania, Philadelphia, PA 19104, USA.
Summary
Pseudohyperphosphatemia, a false high phosphate level, can occur in dialysis patients due to phosphorus in saline solutions. This spurious result may lead to incorrect medical treatments and unnecessary dialysis.
Area of Science:
- Nephrology
- Clinical Chemistry
Background:
- Hyperphosphatemia is common in end-stage renal disease (ESRD).
- Pseudohyperphosphatemia is a laboratory artifact caused by interfering substances, often paraproteins.
Observation:
- A case of pseudohyperphosphatemia was observed in an ESRD patient undergoing hemodialysis.
- The spurious phosphate elevation was traced to a phosphorus-containing saline solution used for sample dilution.
Findings:
- Phosphorus contamination likely occurred during saline manufacturing.
- This contamination can lead to falsely elevated serum phosphate levels in dialysis patients.
Implications:
- Spurious results may cause inappropriate medication adjustments.
- Patients might undergo unnecessary additional hemodialysis treatments.
- Quality control in saline manufacturing is crucial for accurate patient management.