Contrast According to Bushong

The number of particles of contrast media (solute) per kg of water (solvent) is osmolity.

High osmolity contrast media (HOCM) is the conventional "ionic" contrast media.

Blood has an osmolity of approximately 300 mOsm/kg water.

mOsm/kg = milliosmoles per kilogram

High olmolity contrast media has 4 to 8 times the osmolity of blood (1200 to 2500 mOsm/kg).

More notes to come so check back