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: NORCET 2 - 2021 (shift-1)

Explanation

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• In trauma with massive blood loss, the priority is rapid volume resuscitation to treat or prevent hypovolemic shock.
• The rate of fluid administration is directly related to the IV cannula's diameter (gauge). A larger bore (smaller gauge number) provides a higher flow rate.
• The Grey cannula is a 16-gauge device, which allows a high flow rate of approximately 180 mL/min.
• This high flow rate is essential for rapidly infusing large volumes of crystalloids or blood products, making it the most appropriate choice among the options for this patient.

Why Other Options Were Wrong

• Option B: The Green cannula is 18-gauge with a flow rate of about 90 mL/min. While it can be used for trauma and blood transfusions, its flow rate is half that of the Grey cannula, making it less ideal for a patient with massive, active bleeding.
• Option C: The Blue cannula is a 22-gauge device with a low flow rate of about 36 mL/min. This is inadequate for rapid volume replacement in a trauma setting.
• Option D: The Pink cannula is a 20-gauge device with a moderate flow rate of about 60 mL/min. This rate is insufficient for the rapid resuscitation required in massive hemorrhage.

Related Visual

• Visual 1: Infographic: A chart displaying the different IV cannula types with their color, gauge, flow rate, and common clinical indications. This visual aid helps in quickly memorizing and comparing the cannulas.

Clinical Relevance

• Nursing practice connection: Prioritize focused assessment, early escalation, and real-time monitoring when managing IV cannula selection based on clinical indication, specifically in trauma and massive hemorrhage in acute care settings.
• In a trauma setting, selecting and inserting the largest feasible IV cannula is a critical, time-sensitive nursing intervention. The standard of care is often to establish two large-bore IV lines.
• Delay in establishing adequate IV access for volume resuscitation can lead to irreversible hypovolemic shock, organ failure, and death.
• What if? If the patient was a stable adult admitted for elective surgery with no anticipated major blood loss, a Pink (20G) or Green (18G) cannula would be more appropriate.

How to Approach the Question

• First, analyze the clinical scenario: The key phrases are 'RTA' (Road Traffic Accident) and 'massive blood loss', which indicate a major trauma emergency.
• Next, identify the primary clinical need: The patient requires rapid administration of a 'large amount of fluid or blood' to maintain hemodynamic stability.
• Connect the clinical need to the equipment's function: Rapid infusion requires a high flow rate. A larger cannula bore (which means a smaller gauge number) results in a higher flow rate.
• Evaluate the given options by recalling the standard IV cannula color-coding and their corresponding gauges: Grey (16G), Green (18G), Blue (22G), and Pink (20G).
• Compare the flow rates: The 16G Grey cannula has a significantly higher flow rate than the 18G, 20G, and 22G cannulas.
• Finally, select the option that best meets the clinical need. The Grey cannula is the most appropriate choice for rapid volume resuscitation in this emergency.

Concept Tested & Keywords

• Concept Tested: IV cannula selection based on clinical indication, specifically in trauma and massive hemorrhage.
• Stem keywords: RTA, massive blood loss, large amount of fluid, blood, emergency department
• Lead-in keywords: which colour cannula
• Clinical cues: The cue 'massive blood loss' signifies a life-threatening emergency requiring immediate, rapid volume replacement.
• Negative lead-in flag: false

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QP47mc18dY-IFCTH_GlgA0

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