Which statement accurately describes contrast-sparing measures?

Which statement accurately describes contrast-sparing measures?

• A. Hydration, iso-osmolar contrast, and minimizing total contrast volume reduce risk.
• B. Hyperosmolar contrast and increasing contrast volume reduce risk.
• C. Avoiding hydration entirely reduces risk.
• D. Steroids prevent nephropathy.

Answer: (B)

The statement that hydration, iso-osmolar contrast, and minimizing total contrast volume reduce risk is the accurate description of contrast-sparing measures. Hydration helps preserve renal perfusion and dilutes the contrast, lowering its concentration in the tubules. Using iso-osmolar (or low-osmolar) contrast minimizes osmotic stress on the kidneys compared with hyperosmolar agents, reducing potential tubular injury and vasoconstriction. Reducing the total amount of contrast limits the nephrotoxic load the kidneys must handle, directly lowering the risk of contrast-related kidney injury. The other ideas don’t fit because hyperosmolar contrast increases renal stress rather than decreasing it, and increasing the amount of contrast would raise risk. Avoiding hydration would deprive the kidneys of necessary volume and perfusion, increasing risk. Steroids have not shown reliable, consistent protection against contrast-induced nephropathy in standard practice.

The statement that hydration, iso-osmolar contrast, and minimizing total contrast volume reduce risk is the accurate description of contrast-sparing measures. Hydration helps preserve renal perfusion and dilutes the contrast, lowering its concentration in the tubules. Using iso-osmolar (or low-osmolar) contrast minimizes osmotic stress on the kidneys compared with hyperosmolar agents, reducing potential tubular injury and vasoconstriction. Reducing the total amount of contrast limits the nephrotoxic load the kidneys must handle, directly lowering the risk of contrast-related kidney injury.

The other ideas don’t fit because hyperosmolar contrast increases renal stress rather than decreasing it, and increasing the amount of contrast would raise risk. Avoiding hydration would deprive the kidneys of necessary volume and perfusion, increasing risk. Steroids have not shown reliable, consistent protection against contrast-induced nephropathy in standard practice.