PMC5377013_01
Arterial blood gas potassium and PaCO2 measurements in our patient at different points in her management. Using Pearson's correlation coefficient r = -0.89, (p = 0.02).
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fig1
She was treated urgently with intravenous and PEG-potassium replacement and improved with normalisation of the ABG (4) and resolution of her dyspnoea, demonstrating the cause was hypokalaemia and not progression of her MND: see Fig. 1.