Question

Which of the following would reduce the viscosity of contrast media utilized for angiography?

1) Adding more contrast media
2) Increasing the injection rate
3) Increasing the concentration of the contrast media
4) D. Decreasing the temperature of the contrast media

Answer 1

The viscosity of contrast media for angiography is reduced by increasing the temperature, which decreases the cohesive forces in the liquid, allowing for easier flow.

Step-by-step explanation:

The viscosity of contrast media utilized for angiography can be reduced by increasing the temperature of the contrast media. Increasing temperature tends to reduce the effects of cohesive forces in a liquid, thereby decreasing viscosity. This principle follows the general behavior of liquids, wherein heating typically allows for molecules to move more freely as their kinetic energy increases, overcoming intermolecular attractions. In the case of contrast media for angiography, lower viscosity is desirable to ensure easier injection and better flow through blood vessels.

Adding more contrast media or increasing the concentration would actually increase viscosity rather than decrease it. As for increasing the injection rate, it does not directly affect the viscosity of the contrast media; it is more related to the force with which the contrast media is introduced into the body.