Classification

• Normal: 1.1-0.7
• Mild: 0.69-0.5 – No symptoms or non-specific symptoms, such as lethargy, muscle cramps, or muscle weakness
• Severe: <0.5 – Severe neurologic symptoms such as nystagmus, tetany, seizures, and cardiac arrhythmias

Signs/Symps (normally <0.5)

• MSK: Muscle Twitch, Tremor, Tetany, Cramps
• CNS: Apathy, Depression, Hallucination, Agitation, Confusion, Seizure
• CVS: Tachycardia, Hypertension, Arrhythmia, Digoxin Toxicity
• BioChem: Hypokalaemia, Hypocalcaemia, Hypophosphataemia, Hyponatraemia

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