Equis ISSN 2398-2977

Blood: biochemistry - potassium

Synonym(s): K

Contributor(s): Annalisa Barrelet, Kathleen P Freeman, Frank Taylor

Overview

  • 98% of potassium is intracellular.
  • Changes in serum or plasma potassium levels reflect fluid balance, rate of renal excretion and changes in balance between intra- and extracellular fluid.
  • Hypokalemia increases membrane potential, resulting in hyperpolarization with weakness or paralysis.
  • Hyperkalemia decreases membrane potential with resulting hyperexcitability.

Sampling

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Tests

Methodologies

  • Ion-specific electrode method.

Availability

  • Routine test, widely available.

Technique (intrinsic) limitations

  • Test results only significant in conjunction with other laboratory results and clinical findings.

Technician (extrinsic) limitations

  • Routine test.

Result Data

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Further Reading

Publications

Other sources of information

  • Kaneko J J, Harvey J W & Bruss M L (1997) EdsClinical Biochemistry of Domestic Animals.5th edn. Academic Press, Boston.

Organisation(s)

  • Veterinary commercial laboratories, State diagnostic laboratories or Veterinary College laboratories.


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