Composition of intravenous fluids
| Fluid | Na+ (mmol/l) | K+ (mmol/l) | Ca2+ (mmol/l) | Cl− (mmol/l) | HCO3 − (mmol/l) | Dext. (g/l) | Osmol. (mosm/l) |
|---|---|---|---|---|---|---|---|
| 0.45% NaCl | 77 | 77 | 155 | ||||
| 0.9% NaCl | 154 | 154 | 308 | ||||
| 5% NaCl | 856 | 856 | 1722 | ||||
| Ringer’s | 147 | 4 | 2 | 155 | 310 | ||
| Lactated Ringer’s (Hartmann’s) | 131 | 5 | 2 | 111 | 29* | 280 | |
| Darrow’s | 121 | 35 | 103 | 53* | 312 | ||
| 0.9% NaCl + 5.5% Dext. | 154 | 154 | 50 | 560 | |||
| 0.18% NaCl + 4% Dext. | 31 | 31 | 40 | 264 | |||
| Duphalyte** | 2.6 | 1.0 | 3.6 | 454 | Unknown |
Dext. = Dextrose; Osmol. = Osmolality.
* Bicarbonate is present as lactate.
** Also contains a mixture of vitamins and small quantities of amino acids and 1.2 mmol/l of MgSO4