The common cause of airway obstruction in an unconscious patient is?

IGNOU Post B. SC. Nursing entrance-2019

Medical Surgical Nursing

Easy

Appeared in: IGNOU Post B. SC. Nursing entrance-2019

Explanation

In an unconscious patient, there is a generalized loss of muscle tone, including the muscles of the jaw and tongue.
This relaxation allows the base of the tongue to fall backward and occlude the oropharynx, creating a mechanical blockage of the airway.
This is the most frequent and immediate cause of airway obstruction in non-trauma, unresponsive patients.
Basic life support airway maneuvers, like the head-tilt-chin-lift, are specifically designed to lift the tongue and clear this type of obstruction.

Option A: An oropharyngeal tumor is a chronic condition that grows over time. While it can eventually cause airway obstruction, it is not the most common cause of acute airway compromise in a newly unconscious patient.
Option B: Laryngeal cysts are relatively uncommon and are not a frequent cause of acute airway obstruction. They are more likely to cause chronic symptoms like hoarseness or a feeling of a lump in the throat.
Option C: While a foreign body is a major cause of airway obstruction (choking), this event typically happens when the person is conscious. In an undifferentiated unconscious patient without a clear history of choking, the tongue is a more probable cause.

Clinical Relevance

Nursing practice connection: Prioritize focused assessment, early escalation, and real-time monitoring when managing Airway Management in Unconscious Patients in acute care settings.
The immediate priority in any unconscious patient is to assess and secure the airway (the 'A' in the ABCs of resuscitation).
Nurses must be able to rapidly recognize signs of airway obstruction (e.g., snoring, gurgling, paradoxical chest movements, cyanosis) and perform basic life support maneuvers.
This knowledge is fundamental for emergency response, post-operative care (especially after anesthesia), and managing any patient with a decreased level of consciousness.

How to Approach the Question

First, identify the key components of the question: the patient is 'unconscious', and you are looking for the 'common cause' of 'airway obstruction'.
Recall the basic physiological changes that occur during unconsciousness. The most significant change related to the airway is the global relaxation of muscles.
Evaluate each option's likelihood. A tumor or cyst is a structural problem that is usually chronic or rare. A foreign body is related to a specific event (choking).
Consider the tongue. It is a large, mobile muscle structure in the pharynx. Its relaxation is a direct and immediate consequence of unconsciousness.
Conclude that the tongue falling back is the most frequent, or 'common', cause of airway obstruction in this general scenario.

Concept Tested & Keywords

QkEhr8ieyK0lbp8ZQXVwCX

E6 Nursing Brunner Adult Health 3SA Vol 2 Part 3 p. 114-116

E6 Physiology Ganong 27e Vol 2 Part 2 p. 4-6