In a COPD patient given O2 by Venturi mask, what is the nursing priority action?

NORCET 1 - 2020

Medical & Surgical Nursing

Hard

Appeared in: NORCET 1 - 2020

Explanation

The priority action is to check alertness to monitor for early signs of carbon dioxide (CO2) narcosis, a life-threatening complication.
In some patients with chronic COPD, the primary stimulus to breathe is low oxygen levels (hypoxic drive), not high CO2 levels.
Administering supplemental oxygen can suppress this hypoxic drive, leading to hypoventilation and a dangerous accumulation of CO2 in the blood (hypercapnia).
The earliest and most sensitive indicators of hypercapnia are neurological changes, such as drowsiness, confusion, lethargy, and a decreased level of consciousness.

Option A: This addresses a comfort and skin integrity issue. While important for routine care, it is not the priority over monitoring for an immediate life-threatening complication.
Option B: This is an unsafe action. If the patient's alertness is declining due to CO2 narcosis, they are at a high risk for aspiration.
Option C: This position is contraindicated. Lying flat increases the work of breathing and worsens respiratory distress in patients with COPD by limiting diaphragmatic excursion.

Visual 1: Flowchart: Pathophysiology of Oxygen-Induced Hypercapnia. This visual would illustrate the sequence: Chronic CO2 retention → Switch to hypoxic drive → High FiO2 administration → Suppression of hypoxic drive → Hypoventilation → Increased PaCO2 → CO2 Narcosis (decreased LOC).
Visual 2: Diagram: Venturi Mask. This would show the air-entrainment ports and color-coded diluters, explaining how it delivers a precise, fixed FiO2, which is crucial for managing oxygen in COPD patients.

Clinical Relevance

Nursing practice connection: Safe nursing care depends on performing Nursing priorities and complications of oxygen therapy in patients with Chronic Obstructive Pulmonary Disease (COPD) in the correct sequence, documenting the action clearly, and monitoring for the expected response.
The goal of oxygen therapy in at-risk COPD patients is to achieve an adequate oxygen saturation (typically 88-92%) without depressing the respiratory drive. This is a delicate balance requiring vigilant monitoring.
A change in mental status is often the first sign of a critical respiratory problem in this population, potentially appearing before significant changes in respiratory rate or SpO2.
What if? If the patient is found to be lethargic and difficult to arouse, the nurse's immediate priority is to reduce the oxygen concentration, maintain the airway, and notify the physician or rapid response team immediately, as the patient may require ventilatory support.

How to Approach the Question

Identify the patient population and intervention: The patient has COPD and is receiving oxygen, which is a known high-risk clinical scenario.
Recall the key pathophysiology: Remember the concept of 'hypoxic drive' and the associated risk of CO2 retention (hypercapnia) when administering oxygen to this specific patient group.
Analyze the question's focus: The keyword is 'priority'. This requires you to rank the options from most to least critical for immediate patient safety.
Apply the ABCs (Airway, Breathing, Circulation) framework with a specific nuance. In this case, a change in consciousness (a neurological sign) is the most sensitive and earliest indicator of a life-threatening 'Breathing' problem (hypoventilation and CO2 narcosis).
Evaluate each option based on this primary risk: 'Check alertness' directly assesses for CO2 narcosis. The other options either address lower-priority comfort issues, are unsafe, or are clinically contraindicated.

Concept Tested & Keywords

Concept Tested: Nursing priorities and complications of oxygen therapy in patients with Chronic Obstructive Pulmonary Disease (COPD).
Stem keywords: COPD patient, O2, Venturi mask, nursing priority
Lead-in keywords: priority action
Clinical cues: The combination of a COPD diagnosis and oxygen administration is a clinical cue for the risk of oxygen-induced hypercapnia.

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