What is a key consideration when selecting a suction catheter size for an adult airway?

• A. It should pass through the airway without causing trauma
• B. Size is unimportant as long as it fits
• C. It should pass through the airway without causing trauma; typically about 12-14 French for adults
• D. Use the largest possible size for fastest suction

Answer: (C)

The main idea is balancing safety with effectiveness when selecting a suction catheter. You want a size that can pass through the airway (or endotracheal tube) without causing trauma, while still providing adequate suction. For adults, a common and practical range is about 12–14 French. This size is large enough to clear secretions efficiently but small enough to pass through the airway safely and not irritate or injure the mucosa. Using the largest possible size for speed isn't correct because it increases the risk of trauma and airway obstruction; conversely, choosing a size that's too small may be ineffective at clearing material. In short, pick a catheter that can pass safely through the airway and is appropriate for an adult, with 12–14 French being a typical guideline.