Hypokalaemia
Severity
Range
- MildK 3.0–3.4
- ModerateK 2.5–2.9
- SevereK < 2.5 or symptomatic / ECG changes
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GI losses Causes
VomitingDiarrhoeaNG suctionHigh-output stoma / fistula
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Renal losses Causes
Loop / thiazide diureticsHyperaldosteronism (Conn's)Cushing'sRenal tubular acidosis 1 & 2Bartter / Gitelman
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Cellular shift Causes
Insulin (DKA treatment)Salbutamol / β-agonistsAlkalosisRefeeding syndrome
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Reduced intake Causes
AlcoholismAnorexiaPoor oral intake
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Drugs Causes
DiureticsSteroidsTheophyllineAmphotericin