AIIMS Delhi NO - 2018
Fundamental of Nursing
Easy
Identify the size of the cannula shown here?
Appeared in: AIIMS Delhi NO - 2018
Explanation
- Intravenous (IV) cannulas are universally color-coded for quick and safe identification of their size (gauge).
- The cannula shown in the image has a pink hub.
- According to the standard color-coding system, pink indicates a 20-gauge cannula.
- This size is commonly used for routine IV fluid administration, medication delivery, and some blood transfusions in adult patients.
Why Other Options Were Wrong
- Option B: An 18-gauge cannula is color-coded green.
- Option C: A 16-gauge cannula is color-coded grey.
- Option D: A 14-gauge cannula is color-coded orange.
Related Visual
Clinical Relevance
- Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain IV cannula size identification by color code as background academic context rather than a clinical decision trigger.
- Correctly identifying the cannula gauge is critical for patient safety. Using a cannula that is too small can delay the administration of life-saving fluids or medications, while one that is too large can cause unnecessary pain and vein damage.
- A key nursing principle is 'the smaller the gauge number, the larger the diameter of the cannula.' This means a 14G cannula is much larger than a 20G cannula.
- What if the patient required a rapid blood transfusion for trauma? The nurse would need to select a larger bore cannula, such as a 16G (grey) or 18G (green), as the 20G (pink) cannula's flow rate of 60 mL/min might be too slow.
How to Approach the Question
- First, carefully observe the image provided with the question.
- Identify the key distinguishing feature of the object, which in this case is the pink color of the IV cannula's hub.
- Recall the standardized color-coding system used for IV cannulas to associate the color with a specific gauge size.
- Match the identified color (pink) to its corresponding gauge (20G).
- Select the option that matches your finding.
Concept Tested & Keywords
- Concept Tested: IV cannula size identification by color code
- Stem keywords: cannula, size, identify
- Lead-in keywords: Identify
- Clinical cues: Image of a pink IV cannula
Question ID
Q979HxvfuaSYoTqU0g4rU9
Reference Book
E6 Nursing Fundamentals Taylor pp. 1092-1094, 819-821
Practise the full AIIMS Delhi NO - 2018
Attempt every question from this paper in a timed mock, then review the full solution for each one.
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