Table 2.
Comparison of electrolyte components, volume, and osmolarity between commercial fluids and GSTT formulas 1 and 2
| Electrolyte concentration (mmol/L) | Fluids compatible with citrate-based anticoagulation |
Fluids compatible with noncitrate anticoagulation |
Fluid based on GSTT formula 1 | Fluid based on GSTT formula 2 | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| CiCa K2 | CiCa K4 | Prism0Cal (Baxter) | Pureflow (NxStage) | MultiBic (Fresenius) | Prismasol (Baxter) | Accusol (Nikkiso) | Pureflow (NxStage) | |||
| Na+ | 133 | 133 | 140 | 140 | 140 | 140 | 140 | 140 | 128 | 135 |
| K+ | 2 | 4 | 2–4 | 0–4 | 0–4 | 0–4 | 0–4 | 0–4 | — | — |
| Mg2+ | 0.75 | 0.75 | 0.5–0.75 | 0.75 | 0.5 | 0.75 | 0.5 | 0.5–0.75 | — | — |
| Ca2+ | — | — | 0 | 0 | 1.5 | 1.25–1.75 | 1.75 | 0–1.5 | — | — |
| HCO3− | 20 | 20 | 22 | 25 | 35 | 32 | 35 | 35 | 25 | 28 |
| Cl− | 116.5 | 118.5 | 108–120.5 | 108.5–120.5 | 111–113 | 109–113 | 109.5–113.5 | 109–113 | 102.7 | 107 |
| PO42− | — | — | — | — | — | — | — | — | — | — |
| Glucose | 5.55 | 5.55 | 6.1 | 5.55 | 5.55 | 5.55 | 5.55 | 5.55 | — | — |
| Volume (L) | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 3 | 3.6 |
| Theoretical osmolarity (mOsm/L) | 278 | 282 | 286–296 | 286–294 | 292–300 | 292–300 | 292–300 | 292–300 | 256 | 270 |
Ca2+, calcium; CiCa, citrate and calcium; Cl−, chloride; GSTT, Guy’s & St Thomas’ NHS Foundation Trust; HCO3−, bicarbonate; K+, potassium; Mg2+, magnesium; Na+, sodium; PO42−, phosphate.