AIIMS Delhi NO - 2017
Nursing Foundation
Easy
Which statement regarding IV cannula size and color is incorrect?
Appeared in: AIIMS Delhi NO - 2017
Explanation
- The statement '24 / Gray' is incorrect.
- According to the universal color-coding system for IV cannulas, a 24-gauge cannula is designated by the color Yellow.
- The color Gray is used to identify a 16-gauge cannula, which is a much larger size used for rapid fluid or blood administration.
Why Other Options Were Wrong
- Option B: This statement is correct. A 22-gauge cannula is universally color-coded as Blue.
- Option C: This statement is correct. A 20-gauge cannula is color-coded as Pink.
- Option D: This statement is correct. An 18-gauge cannula is color-coded as Green.
Related Visual
Clinical Relevance
- Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain IV cannula gauge and color coding as background academic context rather than a clinical decision trigger.
- Rapid identification of cannula size by color is a critical nursing skill, especially in emergencies, as it allows for quick selection of the appropriate device for the required flow rate.
- Using a cannula that is too small for the prescribed therapy (e.g., using a 24G for a rapid blood transfusion) can lead to hemolysis and delayed treatment.
- What if? If a patient requires rapid infusion of a viscous fluid like a blood product, selecting a green (18G) or pink (20G) cannula is appropriate. Choosing a blue (22G) or yellow (24G) cannula would be incorrect as the flow rate would be too slow and could damage blood cells.
How to Approach the Question
- First, identify the core of the question, which is to find the INCORRECT pairing of an IV cannula gauge and its color.
- Recall the standard color-coding system for IV cannulas. Remember that a smaller gauge number means a larger cannula.
- Systematically evaluate each option against the standard color codes.
- Option A: 24G is Yellow, not Gray. This statement is incorrect.
- Option B: 22G is Blue. This statement is correct.
- Option C: 20G is Pink. This statement is correct.
Concept Tested & Keywords
- Concept Tested: IV cannula gauge and color coding
- Stem keywords: IV cannula, size, color
- Lead-in keywords: incorrect
- Negative lead-in flag: The question asks for the INCORRECT statement.
Question ID
QLJViTuOrA4fqeUd1WS5Si
Reference Book
E6 Nursing Fundamentals Taylor p. 1092-1094
Practise the full AIIMS Delhi NO - 2017
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