A simple modification of dialysate potassium: its impact on plasma potassium concentrations and the electrocardiogram.

After changing to a higher dialysate K, the decrease in plasma K concentration after dialysis remained highly significant: from 4.59 (4.35–4.80) to 3.77 (3.26–4.07) mEq/L (P < 0.0001) 1 week after switching and from 4.80 (4.58–5.12) to 3.70 (3.36–4.25) mEq/L (P < 0.0001) 2 weeks after switching.

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Pairwise comparisons showed slightly higher concentrations 2 weeks after switching, compared with concentrations before switching, but the difference did not reach statistical significance (P > 0.0125).

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