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Potassium, Blood

Potassium, Blood is a topic covered in the Davis's Lab & Diagnostic Tests.

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General

Synonym/Acronym:
Serum K+.

Common Use:
To evaluate fluid and electrolyte balance related to potassium levels toward diagnosing disorders such as acidosis, renal failure, dehydration, and monitor the effectiveness of therapeutic interventions.

Specimen:
Serum collected in a gold-, red-, or red/gray-top tube. Plasma collected in green-top (heparin) tube is also acceptable.

Normal Findings:
(Method: Ion-selective electrode)

SerumConventional & SI Units
Birth–7 d3.2–5.5 mEq/L or mmol/L
8 d–1 mo3.4–6 mEq/L or mmol/L
1–5 mo3.5–5.6 mEq/L or mmol/L
6 mo–1 yr3.5–6.1 mEq/L or mmol/L
2–19 yr3.8–5.1 mEq/L or mmol/L
Adult–older adult3.5–5.3 mEq/L or mmol/L
Note: Value ranges may vary depending on the laboratory. Serum values are 0.1 mmol/L higher than plasma values, and reference ranges should be adjusted accordingly. It is important that serial measurements be collected using the same type of collection container to reduce variability of results from collection to collection.Older adults are at risk for hyperkalemia due to the decline in aldosterone levels, decline in kidney function, and effects of commonly prescribed medications that inhibit the renin-angiotensin-aldosterone system.

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Citation

Bladh, Mickey Lynn., and Anne M. Van Leeuwen. "Potassium, Blood." Davis's Lab & Diagnostic Tests, 7th ed., F.A. Davis Company, 2017. Nursing Central, nursing.unboundmedicine.com/nursingcentral/view/Davis-Lab-and-Diagnostic-Tests/425065/all/Potassium__Blood.
Bladh ML, Van Leeuwen AM. Potassium, Blood. Davis's Lab & Diagnostic Tests. 7th ed. F.A. Davis Company; 2017. https://nursing.unboundmedicine.com/nursingcentral/view/Davis-Lab-and-Diagnostic-Tests/425065/all/Potassium__Blood. Accessed April 25, 2019.
Bladh, M. L., & Van Leeuwen, A. M. (2017). Potassium, Blood. In Davis's Lab & Diagnostic Tests. Available from https://nursing.unboundmedicine.com/nursingcentral/view/Davis-Lab-and-Diagnostic-Tests/425065/all/Potassium__Blood
Bladh ML, Van Leeuwen AM. Potassium, Blood [Internet]. In: Davis's Lab & Diagnostic Tests. F.A. Davis Company; 2017. [cited 2019 April 25]. Available from: https://nursing.unboundmedicine.com/nursingcentral/view/Davis-Lab-and-Diagnostic-Tests/425065/all/Potassium__Blood.
* Article titles in AMA citation format should be in sentence-case
TY - ELEC T1 - Potassium, Blood ID - 425065 A1 - Bladh,Mickey Lynn, AU - Van Leeuwen,Anne M, BT - Davis's Laboratory & Diagnostic Tests UR - https://nursing.unboundmedicine.com/nursingcentral/view/Davis-Lab-and-Diagnostic-Tests/425065/all/Potassium__Blood PB - F.A. Davis Company ET - 7 DB - Nursing Central DP - Unbound Medicine ER -