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Table 1 Electrolytes and strong ion difference (SID) of fluid products commonly used in the intensive care unit (ICU)

From: Management of acute metabolic acidosis in the ICU: sodium bicarbonate and renal replacement therapy

Ion Concentration (mEq/L)
Plasma 0.9% NaCl Ringer’s lactate Ringer’s acetate 5% albumin Plasma-Lyte 148 8.4% NaHCO3
Na+ 140 154 131 130 148 140 1000
K+ 5 0 5 4 0 5 0
Cl 100 154 111 109 131 98 0
Ca2+ 2.2 0 2 3 0 0 0
Mg2+ 1 0 1 0 0 1.5 0
HCO3 24 0 0 0 0 0 1000
Lactate 1 0 29 0 0 0 0
Acetate 0 0 0 28 0 27 0
Gluconate 0 0 0 0 0 23 0
SID 47.2 0 28 28 17 48.5 1000
  1. Ions in bold font contribute to SID