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potassium (K+) in urine

Clinical significance: - K+ is the major cation of the intracellular fluid - total body K+ is approximately 4200 meq with only 60 meq in the total extracellular fluid volume. (see K+) - normally, K+ is freely filtered by the glomerulus but tends to be conserved if the serum K+ is low Principle: - See potassium (K+) in serum & urine Increases: - Cushing' syndrome - hyperaldosteronism (primary & secondary) - renal tubular disease - recovery phase of acute tubular necrosis Decreases: - chronic potassium deficiency - Addison's disease - renal diseases with decreased urine flow - glomerulonephritis - pyelonephritis - nephrosclerosis Specimen: No special patient preparation is required. Urine: Collect timed or random specimens by standard laboratory procedures. Preservatives are not necessary & may interferes. Refrigerate specimen during collection & deep refrigerated until analysis. Minimum sample size 0.5 milliliter: with an optimum size of 1.0 milliliters or larger.

Related

potassium (K+) in serum/plasma

Specific

potassium (K+) in timed urine

General

potassium (K+) in body fluid urine chemistry test

References

  1. Tietz, N. W.: Electrolytes, in Textbook of Clinical Chemistry. Philadelphia, W. B. Saunders Co., p. 617, 1987.
  2. Friedman R. B., Young D. S.: Effects of Disease on Clinical Laboratory Tests, Washington, D. C.; AACC Press, 1990.
  3. Package Inserts: Kodak Ektachem Clinical Chemistry Slide (K+) Kodak Clinical Products, Rochester, New York, 1992.
  4. Kodak Ektachem 700 Analyzer Operator's Manual, Kodak Clinical Products, Rochester, New York
  5. Kodak Ektachem Training Manual, Kodak Clinical Products, Rochester, New York, 1993.
  6. Mayo Internal Medicine Board Review, 1998-99, Prakash UBS (ed) Lippincott-Raven, Philadelphia, 1998, pg 601.
  7. Clinical Diagnosis & Management by Laboratory Methods, 19th edition, J.B. Henry (ed), W.B. Saunders Co., Philadelphia, PA. 1996, pg 11.
  8. Panel of 11 tests Laboratory Test Directory ARUP: 20498
  9. Panel of 29 tests Laboratory Test Directory ARUP: 20805
  10. Panel of 8 tests Laboratory Test Directory ARUP: 20849

Component-of

electrolytes in urine potassium (K+)/creatinine in urine sodium/potassium in urine