West's Nomogram is used by:

• A. Using a straight edge align with the child's height and weight
• B. Aligning with height only
• C. Using weight only
• D. Using age to estimate dose

Answer: (A)

West's Nomogram uses two measurements of a child’s body size to estimate a drug dose. You place a straightedge to connect the child’s height and weight on the nomogram, and where that line crosses the dose scale gives the recommended dose. This two-dimensional approach accounts for both height and weight, offering a more accurate dose than using a single measurement. Using height alone, weight alone, or age wouldn’t capture the body size relationship that the nomogram relies on, which is why those options aren’t correct.