Which of the following is not a parameter for Glasgow coma scale (GCS)?

SCTIMST Staff Nurse - 2016

Medical Surgical Nursing

Easy

Appeared in: SCTIMST Staff Nurse - 2016

Explanation

The Glasgow Coma Scale (GCS) is a standardized tool for assessing a patient's level of consciousness.
It evaluates three key areas: Eye Opening (E), Verbal Response (V), and Motor Response (M).
Pupillary response, while a critical part of a complete neurological examination, is not a component of the GCS score itself.
It is assessed separately to evaluate brainstem function, particularly the function of cranial nerves II and III.

Option A: This is incorrect because Eye Opening is the 'E' component of the GCS. It assesses the patient's ability to open their eyes spontaneously, to speech, or to pain, and is scored from 1 to 4.
Option C: This is incorrect because Verbal Response is the 'V' component of the GCS. It assesses the patient's ability to communicate and their orientation, and is scored from 1 to 5.
Option D: This is incorrect because Motor Response is the 'M' component of the GCS. It is the most significant predictor of outcome and assesses the patient's ability to obey commands or respond to stimuli, scored from 1 to 6.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Components of the Glasgow Coma Scale (GCS) as background academic context rather than a clinical decision trigger.
GCS is a critical tool for monitoring changes in a patient's neurological status, especially after a head injury or in intensive care. It provides an objective measure of the level of consciousness.
A drop of 2 or more points in the GCS score is a clinically significant finding that indicates a deteriorating neurological condition and requires immediate notification of the healthcare provider.
The mnemonic 'GCS less than 8, intubate' is a common guideline, as a score of 8 or less indicates a severe head injury and suggests the patient may be unable to protect their own airway.

How to Approach the Question

First, recognize that this is a negative question, asking what is 'not' a parameter. This means three of the options are correct components, and one is not.
Identify the core subject of the question: the Glasgow Coma Scale (GCS).
Recall the three fundamental components of the GCS. A common mnemonic is E-V-M, which stands for Eye opening, Verbal response, and Motor response.
Systematically evaluate each option against the E-V-M components.
Option A ('Eye opening'), Option C ('Verbal response'), and Option D ('Motor response') all match the components of the GCS.
Option B ('Pupillary response') is the only one that does not fit the E-V-M structure. Therefore, it is the correct answer to the 'not' question.

Concept Tested & Keywords

Concept Tested: Components of the Glasgow Coma Scale (GCS)
Stem keywords: Glasgow coma scale, GCS, parameter
Lead-in keywords: not
Negative lead-in flag: The question asks to identify the option that is NOT a component of the GCS.

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E6 Nursing Fundamentals Taylor p. 412-414

E6 Medicine Harrison 22e Part 2 p. 1475-1477