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IV solutions with hypertonic dextrose (D10 or greater) can produce hypokalemia (and hypophosphatemia). Insulin in IV fluids profoundly lowers serum [K]. Sources of spurious serum [K+] values: Too high: hemolysis of sample; polycythemia (blood drawn through < 21 ga. Needle) Too low: dilutional sampling through a line, hep. lock, etc. Hypokalemia ................
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