Which of the following is the correct measurement for oropharyngeal airway?

Appeared in: NORCET 6 Prelims -2024

Explanation

The correct technique for sizing an oropharyngeal airway (OPA) is to measure from the corner of the patient's mouth to the angle of the jaw (mandible).
This measurement ensures the length of the OPA is appropriate to curve over the base of the tongue and hold it away from the posterior pharyngeal wall.
A properly sized OPA maintains a patent airway in an unconscious patient by preventing the tongue from causing an obstruction.
The flange of the correctly sized airway should rest comfortably against the patient's lips once inserted.

Option A: This option is ambiguous and partially incorrect. While 'Angle of the mouth to angle of mandible' is correct, it is paired with 'Targus to angle of mouth'. The tragus of the ear is not a correct landmark for sizing an OPA.
Option C: This measurement is incorrect for an OPA. Measurements originating from the nose are used for sizing a nasopharyngeal airway (NPA).
Option D: This measurement is incorrect. The ala of the nose is not the correct starting point for sizing any standard airway adjunct. Measurements from the nose are associated with NPAs.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Sizing of Oropharyngeal Airway (OPA) as background academic context rather than a clinical decision trigger.
Correctly sizing an OPA is a critical skill for preventing life-threatening airway compromise. An incorrectly sized airway can worsen the obstruction or cause injury.
Nurses must be able to quickly and accurately assess a patient's level of consciousness and gag reflex before attempting to insert an OPA, as it is only safe for unconscious patients without a gag reflex.
What if the patient is semi-conscious or has a gag reflex? In that case, an OPA is contraindicated. A nasopharyngeal airway (NPA) would be the appropriate adjunct to consider, as it is tolerated by patients who are not fully unconscious.

How to Approach the Question

First, identify the key term in the question: 'oropharyngeal airway'.
Recall the specific anatomical landmarks used for sizing this particular airway adjunct.
Differentiate this from the measurement technique for other airways, such as the nasopharyngeal airway (NPA), which involves the nose.
Evaluate each option against the standard procedure. Eliminate options that use incorrect landmarks (e.g., nose, tragus for OPA).
Select the option that provides the most precise and universally accepted measurement technique for an OPA.

Concept Tested & Keywords

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E6 Nursing Fundamentals Potter Perry 12e Part 4 p. 254-255

E6 Nursing Brunner Adult Health 3SA Vol 2 Part 3 p. 116-118

Practise the full NORCET 6 Prelims -2024

Attempt every question from this paper in a timed mock, then review the full solution for each one.