What question did this study set out to answer?

To determine the incidence of true hyperkalemia among low-risk adult emergency department patients who present with elevated, hemolyzed potassium specimens.

October 20, 2020Western Journal of Emergency MedicineOpen Access

Accuracy of Hemolyzed Potassium Levels in the Emergency Department

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To determine the incidence of true hyperkalemia among low-risk adult emergency department patients who present with elevated, hemolyzed potassium specimens.
Prospective observational study conducted across two academic emergency departments across two collection periods (June–November 2017 and June–November 2018).
Included adults aged 18–64 with an initial hemolyzed potassium > 5.1 mEq/L, repeat testing within 12 hours, GFR ≥ 60, and bicarbonate > 20 mEq/L.
Excluded patients with GFR < 60, creatine phosphokinase > 500, hematologic malignancy, or those taking potassium-altering medications prior to repeat testing.
Of 399 screened encounters, 66 low-risk encounters met all criteria and were analyzed.
Zero patients exhibited true hyperkalemia upon repeat non-hemolyzed testing, yielding a true-positive rate of 0% (95% CI, 0–6%).
Initial median hemolyzed potassium was 5.8 mmol/L (IQR 5.6–6.15) compared to a repeat median of 3.9 mmol/L (IQR 3.6–4.3), with a median retest interval of 145 minutes (IQR 87–262).

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Implication

Prospective observational study reveals zero true hyperkalemia cases in low-risk emergency patients, indicating repeat testing may be unnecessary.

Cite This Study

Wilson et al. (2020) studied this question.

synapsesocial.com/papers/6a7476a9f1e99ff85ab1c166 https://doi.org/10.5811/westjem.2020.8.46812

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Implication

Prospective observational study reveals zero true hyperkalemia cases in low-risk emergency patients, indicating repeat testing may be unnecessary.

Accuracy of Hemolyzed Potassium Levels in the Emergency Department

Key Points

Discussion

Implication

Cite This Study

Accuracy of Hemolyzed Potassium Levels in the Emergency Department

Key Points

Discussion

Implication

Cite This Study

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