NORCET-7 Mains-2024
Child Health Nursing (Pediatrics)
Easy
What is the correct statement regarding pre-oxygenation in children before intubation?
Appeared in: NORCET-7 Mains-2024
Explanation
- The standard protocol for pre-oxygenation is administering high-flow, 100% oxygen to create an oxygen reservoir in the lungs.
- A duration of 3-5 minutes of tidal breathing is required to effectively replace the nitrogen in the Functional Residual Capacity (FRC) with oxygen.
- This procedure is critically important in children, who have a higher metabolic rate and smaller FRC, making them desaturate much faster than adults during apnea.
- High-flow oxygen is essential to deliver a high FiO2 (fraction of inspired oxygen), which is necessary for efficient denitrogenation.
Why Other Options Were Wrong
- Option A: While high-flow oxygen is correct, a duration of only 1 minute is generally insufficient to achieve adequate denitrogenation and create a safe oxygen reservoir in the lungs.
- Option B: Both the flow rate and duration are incorrect. Low-flow oxygen cannot deliver the high FiO2 needed for effective pre-oxygenation, and 1 minute is too short.
- Option D: Although the 3-minute duration is correct, using low-flow oxygen is ineffective. Low-flow systems allow for significant mixing with room air, preventing the delivery of the near-100% oxygen concentration required to wash out nitrogen from the lungs.
Related Visual
Clinical Relevance
- Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain The question tests the knowledge of the standard protocol for pre-oxygenation in pediatric patients prior to endotracheal intubation as background academic context rather than a clinical decision trigger.
- Proper pre-oxygenation is a critical safety step to prevent hypoxic brain injury, a devastating complication that can occur during the apneic period of intubation.
- Nurses play a key role in ensuring the mask has a tight seal, monitoring the patient's oxygen saturation (SpO2), and communicating effectively with the team during this high-risk procedure.
- What if? If a child is uncooperative and will not tolerate a face mask for 3 minutes, the team may need to proceed with a rapid sequence induction (RSI). In this case, the goal is still to maximize pre-oxygenation in the seconds leading up to the administration of induction agents.
How to Approach the Question
- First, identify the key concepts in the question: 'pre-oxygenation', 'children', and 'intubation'.
- Recall the fundamental goal of pre-oxygenation: to create an oxygen reserve in the lungs to prevent hypoxia during apnea.
- Remember the two critical parameters of the procedure: oxygen flow rate and duration.
- To achieve the goal, a very high concentration of oxygen (high FiO2) is needed, which requires a 'high-flow' system.
- The standard duration to replace nitrogen with oxygen via normal breathing is 3-5 minutes.
- Evaluate each option against these two standards: high flow and 3 minutes. Only one option will match both criteria.
Concept Tested & Keywords
- Concept Tested: The question tests the knowledge of the standard protocol for pre-oxygenation in pediatric patients prior to endotracheal intubation.
- Stem keywords: pre-oxygenation, children, intubation
- Lead-in keywords: correct statement
Question ID
QPi0st9_tMMOK9nFxhcF4P
Reference Book
E6 Nelson Textbook of Pediatrics(2024) — Volume 1 p. 663-665
E6 Ghai Essential Pediatrics(pp 26-904 of 913) p. 780-782
Practise the full NORCET-7 Mains-2024
Attempt every question from this paper in a timed mock, then review the full solution for each one.
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