Makindo Medical Notes"One small step for man, one large step for Makindo" |
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Related Subjects: |Metabolic acidosis |Metabolic alkalosis |Arterial Blood gas analysis
🩺 Cause | 🤒 Clinical Features | 🔬 Diagnostic Tests | 💊 Management |
---|---|---|---|
🤮 Vomiting / NG Suction | Loss of HCl → dehydration, postural hypotension | ABG: ↑pH, ↑HCO₃⁻
U&E: ↓Cl⁻, ↓K⁺ |
IV 0.9% NaCl + K⁺ replacement
Stop suction / treat vomiting |
💊 Diuretics (Loop / Thiazide) | Weakness, dizziness, dehydration | ABG: ↑pH, ↑HCO₃⁻
Electrolytes: ↓K⁺, ↓Cl⁻ |
Stop / adjust diuretic
IV saline + KCl supplements |
🧬 Hyperaldosteronism | HTN, muscle weakness, thirst, polyuria | ABG: ↑pH, ↑HCO₃⁻
Electrolytes: ↓K⁺, ↑Na⁺ Renin: ↓, Aldosterone: ↑ |
Treat cause (e.g., adrenal adenoma)
Spironolactone / eplerenone |
💉 Excess Bicarbonate | Confusion, paraesthesia, cramps, fluid overload | ABG: ↑pH, ↑HCO₃⁻
Electrolytes: ↑Na⁺, ↓K⁺ |
Stop bicarbonate
Treat underlying acidosis cause |
⚡ Hypokalaemia | Weakness, palpitations, arrhythmias (PVCs) | ECG: U waves, flat T waves
Serum: ↓K⁺ |
Potassium replacement (oral / IV)
Treat underlying cause |
💧 Contraction Alkalosis | Dehydration (dry mouth, low BP) | ABG: ↑pH, ↑HCO₃⁻
U&E: ↓Cl⁻, ↓K⁺ Urine Cl⁻: low |
IV 0.9% NaCl + KCl
Correct volume loss |
🥛 Milk-Alkali Syndrome | Nausea, vomiting, confusion, kidney stones | ABG: ↑pH
Electrolytes: ↑Ca²⁺, ↑HCO₃⁻ Creatinine ↑ |
Stop Ca²⁺ / antacids
IV fluids Severe hypercalcaemia → bisphosphonates |