A patient with COPD is receiving oxygen at 6 L/min via nasal cannula and develops dizziness and altered level of consciousness. What is the priority nursing intervention?

1. A

   Reduce FiO₂ and notify the physician

2. B

   Increase FiO₂

3. C

   Encourage deep breathing exercises

4. D

   Place the patient in supine position

Appeared in: NORCET 10 Mains

Explanation

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• The patient is exhibiting classic signs of oxygen-induced hypercapnia (CO₂ narcosis), a known complication in some COPD patients.
• In certain individuals with chronic COPD, the primary stimulus to breathe is hypoxia (low oxygen), not hypercapnia (high carbon dioxide). This is called the 'hypoxic drive'.
• Administering a high flow of oxygen (6 L/min is high for this population) can suppress this hypoxic drive, leading to hypoventilation, CO₂ retention, and neurological symptoms like dizziness and confusion.
• The priority action is to reverse the cause by reducing the oxygen flow rate to a safer level (e.g., 1-2 L/min) to allow CO₂ levels to decrease.
• Notifying the physician is a concurrent priority to ensure prompt medical evaluation and further orders, such as an arterial blood gas (ABG) analysis.

Why Other Options Were Wrong

• Option B: Increasing the FiO₂ would worsen the suppression of the hypoxic drive, leading to more severe CO₂ retention and a deeper level of consciousness alteration, potentially causing respiratory arrest.
• Option C: A patient with an altered level of consciousness cannot safely or effectively perform deep breathing exercises. Furthermore, this does not address the root cause of the problem, which is CO₂ narcosis.
• Option D: Placing a patient with COPD in a supine (flat) position can increase the work of breathing and worsen dyspnea by limiting diaphragmatic movement.

Related Visual

• Visual 1: Flowchart: Pathophysiology of Oxygen-Induced Hypercapnia in COPD. This visual would trace the path from high FiO₂ administration to suppression of hypoxic drive, leading to hypoventilation, increased PaCO₂, respiratory acidosis, and finally, CO₂ narcosis.
• Visual 2: Diagram: Comparison of Respiratory Drives. A side-by-side diagram showing the normal respiratory drive (stimulated by high CO₂) versus the hypoxic drive in some COPD patients (stimulated by low O₂).

Clinical Relevance

• Nursing practice connection: Safe nursing care depends on performing Priority nursing intervention for oxygen-induced hypercapnia in a patient with Chronic Obstructive Pulmonary Disease (COPD) in the correct sequence, documenting the action clearly, and monitoring for the expected response.
• The guiding principle for oxygen therapy in known or suspected chronic CO₂ retainers is 'start low, go slow.' The goal is to maintain a target oxygen saturation of 88-92%, not 100%.
• Always assess a COPD patient's level of consciousness and respiratory rate before and after initiating or titrating oxygen therapy. Drowsiness can be the first sign of CO₂ narcosis.
• A Venturi mask is often a safer choice than a nasal cannula for these patients because it delivers a more precise, fixed concentration of oxygen, reducing the risk of over-oxygenation.

How to Approach the Question

• First, identify the patient's chronic condition: COPD. This is a major clue that points towards specific physiological vulnerabilities.
• Next, analyze the intervention and the patient's response: The patient received oxygen at 6 L/min and subsequently developed dizziness and an altered level of consciousness.
• Connect the patient's condition (COPD) with the complication (neurological changes after high-flow O₂). Recall the concept of the 'hypoxic drive' and oxygen-induced hypercapnia.
• Evaluate the options based on the pathophysiology. The priority must be to reverse the cause of the acute deterioration.
• Eliminate options that would either worsen the condition (increasing O₂) or are inappropriate for the patient's current state (deep breathing with altered LOC, supine position).
• Select the option that directly addresses the problem: reducing the oxygen flow to a safer level and escalating care by notifying the physician.

Concept Tested & Keywords

• Concept Tested: Priority nursing intervention for oxygen-induced hypercapnia in a patient with Chronic Obstructive Pulmonary Disease (COPD).
• Stem keywords: COPD, oxygen, 6 L/min, nasal cannula, dizziness, altered level of consciousness
• Lead-in keywords: priority nursing intervention
• Clinical cues: Patient with a chronic condition (COPD) developing acute neurological symptoms (dizziness, altered LOC) after a specific intervention (high-flow oxygen).

Question ID

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