Abstract

Many ED patients who have hyperkalemia (HK) with hemolysis may not require repeat potassium (K) testing, though ED physicians often redraw levels. One retrospective study using a creatinine (Cr) based level for normal renal function (NRF) reported 23% of patients with HK do not require retesting. We hypothesized that NRF defined by estimated glomerular filtration rate (GFR) may be a better predictor of the need for repeat testing than Cr.

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