After RTA, a patient came into emergency department with massive blood loss, which colour cannula used by a prudent nurse to administer large amount of fluid or blood?

1. A

   Grey

2. B

   Green

3. C

   Blue

4. D

   Pink

Appeared in: NORCERT 8 Mains-2025

Explanation

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• The clinical scenario involves massive blood loss, which is a life-threatening emergency requiring rapid intravenous fluid and/or blood product administration.
• The principle of fluid resuscitation in trauma is to use a large-bore cannula, as it offers less resistance to flow, allowing for faster infusion rates.
• A Grey cannula corresponds to a 16-gauge size, which has a high flow rate of approximately 180 mL/min.
• Among the choices provided, the Grey cannula allows for the most rapid administration of fluids, making it the most prudent and appropriate choice for managing a patient with massive hemorrhage.

Why Other Options Were Wrong

• Option B: A Green (18-gauge) cannula has a flow rate of approximately 90 mL/min, which is half that of a Grey cannula. While suitable for many situations, it is less optimal for 'massive' blood loss where maximum speed is required.
• Option C: A Blue (22-gauge) cannula has a very low flow rate (around 36 mL/min) and is considered a small-bore catheter. Using it for rapid fluid resuscitation would be ineffective and dangerous.
• Option D: A Pink (20-gauge) cannula has a moderate flow rate (around 60 mL/min) but is insufficient for the rapid volume replacement needed in a massive hemorrhage.

Related Visual

• Visual 1: Infographic - A chart displaying different IV cannulas. Each entry should show the cannula, its color, gauge size, length, flow rate in mL/min, and list its primary clinical indications (e.g., Grey, 16G, 180 mL/min, Trauma/Rapid Resuscitation).

Clinical Relevance

• Nursing practice connection: Prioritize focused assessment, early escalation, and real-time monitoring when managing IV Cannula Selection for Fluid Resuscitation in acute care settings.
• In any trauma patient with suspected significant hemorrhage, the standard of care is to establish two large-bore peripheral IV lines (e.g., 14G or 16G) immediately upon arrival to facilitate rapid, simultaneous administration of fluids, blood products, and emergency medications.
• Prompt and adequate fluid resuscitation is a critical nursing intervention to prevent the progression of hypovolemic shock, organ failure, and death in trauma patients.
• What if? If the patient were an infant with massive blood loss and peripheral IV access was impossible to obtain after one or two attempts, the priority would shift to establishing intraosseous (IO) access. IO access allows for the same fluids and medications to be administered at rapid rates directly into the bone marrow.

How to Approach the Question

• First, identify the core clinical problem in the question stem: 'massive blood loss' following a 'RTA' (Road Traffic Accident). This signals a high-acuity emergency.
• Next, understand the intervention required: administering a 'large amount of fluid or blood'. This implies a need for a high flow rate.
• Recall the principle of IV cannulas: a lower gauge number means a larger cannula diameter and a higher flow rate.
• Evaluate the options based on their color and corresponding gauge size/flow rate. Mentally rank them from highest flow rate to lowest: Grey (16G) > Green (18G) > Pink (20G) > Blue (22G).
• Select the cannula with the highest flow rate (Grey) as it is the most appropriate choice for the described emergency scenario.

Concept Tested & Keywords

• Concept Tested: IV Cannula Selection for Fluid Resuscitation
• Stem keywords: RTA, massive blood loss, large amount of fluid, cannula
• Lead-in keywords: which colour
• Clinical cues: Patient status: Post-RTA with massive blood loss, indicating a trauma/emergency situation.
• Clinical cues: Intervention required: Administration of a large amount of fluid or blood, indicating the need for rapid infusion.

Question ID

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