What is the notation for 2/3 dextrose 5% in 1/3 normal saline?

• A. 2/3 - 1/3
• B. D5W
• C. D5NS
• D. D5-1/2 NS

Answer: (A)

This notation expresses the proportions of two IV fluid components. In a mixture described as 2/3 dextrose 5% in 1/3 normal saline, two-thirds of the volume comes from D5W (dextrose 5% in water) and one-third from normal saline. The dash separates the components and the fractions indicate their relative amounts, so 2/3 - 1/3 is the correct way to represent this specific blend.

If you were to make 1000 mL of this solution, you’d use about 666 mL of D5W and 334 mL of NS. The other options describe different fluids: D5W alone is all dextrose in water; D5NS is dextrose in normal saline; D5-1/2 NS is dextrose in half-normal saline.