Selection of the correct catheter is based on the patient's:

• A. Age, mental development, and sexual preference
• B. Age, size, and the type of procedure
• C. Age, size, and gender
• D. Size, grade in school, and gender

Answer: (B)

Catheter selection hinges on patient-specific factors that determine the appropriate size and how it will be used. The best choice reflects age, size, and the type of procedure. Age matters because pediatric patients need smaller catheters, while adults require larger sizes. Size refers to the catheter’s diameter chosen to fit the patient’s urethra comfortably and safely. The type of procedure dictates whether an indwelling catheter is needed for ongoing drainage, a short-term or intermittent catheter for diagnostic or temporary relief, or a different approach altogether. The remaining factors listed aren’t used to choose a catheter in standard practice (mental development, sexual preference, school grade), and while gender relates to anatomy, the primary determinants are age, size, and the intended procedure.