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| {{Hypokalemia}}
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| {{CMG}}'''; Associate Editor-In-Chief:''' {{CZ}}; '''Assistant Editor(s)-In-Chief:''' [[User:Jack Khouri|Jack Khouri]]
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| == Laboratory Findings ==
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| * Complete blood count (CBC)
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| * Blood urea nitrogen (BUN)/creatinine
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| * Calcium
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| * Magnesium
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| * Glucose
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| * Arterial blood gases
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| * Aldosterone level
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| * Renin levels
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| * Urinary sodium
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| * Urine potassium
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| ** Levels <25 meq/'''day''' (or <15 meq/L on urine '''spot''') rule out a renal cause of hypokalemia and suggest extrarenal potassium loss or transcellular shift
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| ** Higher potassium excretion suggest renal losses.
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| * Transtubular potassium gradient (TTKG)
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| ** TTKG= (Urine K x Plasma osmolarity)/(Plasma K x Urine osmolarity)
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| ** A TTKG less than 2-3 indicates renal potassium conservation in a hypokalemic patient
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| ** A urine osmolality less than plasma osmolality or urine sodium <20 mEq/L, the formula is not applicable
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| * Urine chloride
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| ** <25 meq/L: vomiting or remote diuretic use
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| ** >40 meq/L: diuretics, Bartter's, Gitelman's and mineralocorticoid excess
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| ==References==
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| {{Reflist|2}}
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| [[Category:Electrophysiology]]
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| [[Category:Cardiology]]
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| [[Category:Endocrinology]]
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| [[Category:Emergency medicine]]
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| [[Category:Nephrology]]
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| [[Category:Electrolyte disturbance]]
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| [[Category:Blood tests]]
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| [[Category:Intensive care medicine]]
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| [[fr:Hypokaliémie]]
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| [[pl:Hipokaliemia]]
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| [[pt:Hipocaliémia]]
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| [[ru:Гипокалиемия]]
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| [[vi:Hạ kali máu]]
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| [[Category:Inborn errors of metabolism]]
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