For a chronic obstructive pulmonary disease patient in ICU, following is preferred device for oxygen suppleme… - BHU NO-2019

BHU NO-2019

Medical Surgical Nursing

Hard

Appeared in: BHU NO-2019

Explanation

Patients with COPD may rely on a 'hypoxic drive' to breathe, where low blood oxygen levels, rather than high carbon dioxide, stimulate respiration.
Administering excessive or uncontrolled oxygen can suppress this drive, leading to hypoventilation and a dangerous increase in blood carbon dioxide levels (hypercapnia).
The Venturi mask is a high-flow device that delivers a precise, fixed concentration of oxygen (FiO2) by entraining a specific amount of room air.
This precision allows for careful titration of oxygen to achieve a target saturation (usually 88-92%) without the risk of over-oxygenating the patient and causing respiratory depression.

Option A: A medium concentration (simple) mask delivers a variable FiO2 that depends on the patient's breathing pattern. It is contraindicated in patients who retain CO2, like many with COPD, as it can worsen hypercapnia.
Option B: A nasal cannula is a low-flow device that delivers an imprecise FiO2, which fluctuates with the patient's respiratory rate and depth. It does not provide the controlled oxygen delivery needed for an acutely ill COPD patient.
Option D: An oxygen tent provides a poorly controlled oxygen concentration and is primarily used in pediatric settings. It is not a suitable or safe method for delivering precise oxygen therapy to an adult with COPD.

Clinical Relevance

Nursing practice connection: Prioritize focused assessment, early escalation, and real-time monitoring when managing Oxygen Delivery Devices for COPD in acute care settings.
The primary goal of oxygen therapy in COPD is to treat hypoxemia without causing significant hypercapnia. The mantra is 'low and slow'.
Nurses must vigilantly monitor for signs of carbon dioxide narcosis (lethargy, confusion, drowsiness, headache, decreased respiratory rate) when initiating or titrating oxygen for a COPD patient.
The target oxygen saturation (SpO2) for most COPD patients is 88-92%. A higher saturation may indicate over-oxygenation and risk of respiratory depression.

How to Approach the Question

First, identify the patient's primary diagnosis: Chronic Obstructive Pulmonary Disease (COPD).
Recall the critical pathophysiological principle associated with oxygen therapy in COPD: the risk of suppressing the 'hypoxic drive' and causing CO2 retention (hypercapnia).
Analyze the question's core requirement: finding the 'preferred device' for an ICU patient, which implies a need for precision and safety.
Evaluate each oxygen delivery device based on its ability to provide a controlled and precise FiO2.
Compare the options: Nasal cannulas and simple masks deliver variable FiO2. An oxygen tent offers poor control. The Venturi mask is specifically designed to deliver a fixed, accurate FiO2.
Conclude that the Venturi mask is the safest and most effective option because it minimizes the risk of hypercapnia while treating hypoxemia.

Concept Tested & Keywords

Concept Tested: Oxygen Delivery Devices for COPD
Stem keywords: chronic obstructive pulmonary disease, COPD, ICU, oxygen supplementation
Lead-in keywords: preferred device
Clinical cues: Patient has COPD, which is a critical factor in choosing an oxygen device due to the risk of CO2 retention.
Negative lead-in flag: false

Q-P7BdXjEwaJ2TSwNvef96

E6 Nursing Fundamentals Potter Perry 12e Part 5 p. 7-9

E6 Nursing Fundamentals Taylor p. 731-733