Table 1.
Videofluoroscopic contrast agents used in the present study
| Name | Concentration of contrast substance (%w/w) | Target viscosity (mPa s) | Viscosifying agents (thickeners) |
|---|---|---|---|
| Varibar® Thin Liquid | – | 4 | Carboxymethyl cellulose |
| Varibar® Nectar | 30 | 300 | Carboxymethyl cellulose, natural gum |
| Varibar® Thin Honey | 29 | 1,500 | Carboxymethyl cellulose, natural gum, modified starch (corn) |
| Varibar® Honey | 29 | 3,000 | Carboxymethyl cellulose, natural gum, modified starch (corn) |
| Varibar® Pudding | 30 | 5,000 | Carboxymethyl cellulose, natural gum |
| E-Z-Paque® | 41 | – | – |
| Gastrografin® | 26 | 18.5 | – |
The information in columns 2–4 is given by the suppliers. Viscosity values are given in mPa s (millipascal seconds) and are equivalent to cP (centipoise). According to the supplier, for the Varibar® series of products, viscosity values are valid at 30 s−1 and 25 °C