Table 1.

Composition of Crystalloid Solutions

Fluid	Sodium	Potassium	Calcium	Magnesium	Chloride	Acetate	Gluconate	Malate	Lactate	Osmolarity
Plasma	135–145	4.5–5.0	2.2–2.6	0.8–1.0	94–111	0.02–0.2			1–2	275–295
Plasma-Lyte A	140	5.0		3.0	98	27	23			294
Normosol-R	140	5.0		3.0	98	27	23			295
Isolyte S	141	5.0		3.0	98	27	23			295
Ringer’s acetate	145	4.0	2.5	1.0	127	24		5		309
Lactated Ringer’s	130	4.0	2.7		109				28	273
Hartmann’s solution	131	5.4	1.8		112				28	280
0.9% sodium chloride	154				154					308

All values are in mEq/L, except calculated osmolarity, which is in mOsm/L. Plasma-Lyte A is “Multiple Electrolyte Injection, Type 1, USP,” from Baxter Healthcare Corporation; Normosol-R is “Multiple Electrolyte Injection, Type 1, USP,” from Hospira, Inc.; Isolyte S is from B. Braun Medical Inc.; Ringer’s acetate is “Sterofundin ISO, Isotonic Electrolyte Solution,” from B. Braun; lactated Ringer’s is “lactated Ringer’s Injection, USP,” from Baxter Healthcare Corporation; Hartmann’s solution is “Compound Sodium Lactate” from Baxter Healthcare Corporation; and 0.9% saline is “Sodium Chloride Injection, USP,” from Baxter Healthcare Corporation.