Why would cricoid pressure be applied during the intubation procedure?

Appeared in: NORCET 7 Prelims -2024

Explanation

Cricoid pressure, also known as the Sellick maneuver, is a technique used during endotracheal intubation to prevent aspiration.
It involves applying firm, backward pressure on the cricoid cartilage, which is the only complete cartilaginous ring in the airway.
This action physically compresses the esophagus against the underlying cervical vertebrae.
The primary purpose of occluding the esophagus is to prevent passive regurgitation of gastric contents into the pharynx and subsequent aspiration into the lungs.

Option A: Patient movement during intubation is undesirable and is managed with sedative and paralytic medications, not by applying cricoid pressure.
Option B: The adenoids are located in the nasopharynx and are not visualized during a standard oral endotracheal intubation. The primary goal is to visualize the glottis and vocal cords.
Option D: Opening the patient's airway is achieved with maneuvers like the head-tilt/chin-lift or jaw-thrust. Applying cricoid pressure can sometimes worsen the view of the larynx rather than opening the airway.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain The purpose and application of cricoid pressure (Sellick maneuver) during endotracheal intubation as background academic context rather than a clinical decision trigger.
Cricoid pressure is a critical skill in emergency medicine, particularly during Rapid Sequence Intubation (RSI), to protect patients with a high risk of aspiration (e.g., trauma, pregnancy, bowel obstruction).
Nurses assisting with intubation must be able to locate the cricoid cartilage accurately and apply the correct amount of pressure (approximately 30 Newtons or 3-4 kg of force in an adult).
Patient safety is paramount. The nurse must be prepared to release pressure immediately if the patient begins to actively vomit, as maintaining pressure can lead to esophageal rupture.

How to Approach the Question

First, identify the key terms in the question: 'cricoid pressure' and 'intubation procedure'.
Recall the definition and purpose of cricoid pressure. This technique is also known as the Sellick maneuver.
Think about the anatomy involved: the cricoid cartilage is a ring in the trachea, and the esophagus lies directly behind it.
Evaluate each option based on the mechanism of applying pressure to this specific anatomical location.
Eliminate option A: Patient movement is controlled by drugs.
Eliminate option B: Adenoids are in the wrong anatomical area.

Concept Tested & Keywords

Concept Tested: The purpose and application of cricoid pressure (Sellick maneuver) during endotracheal intubation.
Stem keywords: cricoid pressure, intubation procedure
Lead-in keywords: Why
Negative lead-in flag: false

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E6 Nelson Textbook of Pediatrics(2024) — Volume 1 p. 604-606

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