Comparison of CM agents by osmolality and viscosity
| Blood plasma | Iso-osmolar eg, Visipaque | Low-osmolar eg, Omnipaque | High-osmolar eg, Hypaque | |
|---|---|---|---|---|
| Osmolality | 290 mosmol/L | 290 mosmol/L | 890 mosmol/L | 2100 mosmol/L |
| Viscosity | 3–4 mPa s | 8.8 mPa s | 6.8 m mPa s | 4.1 mPa s |
| CIN risk | N/A | Low | Low | High |
CIN, contrast-induced nephropathy; CM, contrast media.