Removal of fluid can be adjusted by altering the glucose concentration of the fluid. Three
“strengths” of fluid are available:
LOW (Light). The fluid in a light bag has an osmolality only slightly higher than plasma
osmolality, and contains 15 g/L or 13.6 g/L anhydrous glucose, depending on the
manufacturer
MEDIUM. This fluid generates a moderate osmotic gradient favouring fluid removal and
contains 22.7 g/L glucose.
HIGH (heavy). This fluid generates a marked osmotic gradient favouring fluid removal
and contains 42.5 g/L or 38.6 g/L anhydrous glucose, depending on the manufacturer.