A 43 years old male patient, who has severe dyspnoea, comes into the OPD and stating I stop for breath after waking about 100 meters or after a few minutes on lever ground. Based on patient's information, identify the grade of dyspnoea on mMRC scale?

1. A

   Grade-01

2. B

   Grade-02

3. C

   Grade-03

4. D

   Grade-04

Appeared in: NORCET -4 , 2023

Explanation

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• The patient's description of their breathlessness directly matches the criteria for Grade 3 on the Modified Medical Research Council (mMRC) scale.
• mMRC Grade 3 is specifically defined as: 'Stops for breath after walking about 100 meters or after a few minutes on level ground'.
• The mMRC scale is a subjective tool used to quantify the functional impact of dyspnoea on a patient's daily life.
• This patient's statement is a classic example used to identify Grade 3 dyspnoea, indicating a severe level of limitation.

Why Other Options Were Wrong

• Option A: Grade 1 describes breathlessness when hurrying or walking up a slight hill, which is a lower level of impairment than what the patient is experiencing.
• Option B: Grade 2 describes walking slower than peers or having to stop for breath while walking at one's own pace. The patient's limitation is more severe and specific (a distance of 100m).
• Option D: Grade 4 represents the most severe level of dyspnoea, where a person is too breathless to leave the house or gets breathless during self-care activities like dressing. The patient is not yet at this stage.

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Clinical Relevance

• Nursing practice connection: Safe nursing care depends on performing Assessment of dyspnoea using the Modified Medical Research Council (mMRC) scale in the correct sequence, documenting the action clearly, and monitoring for the expected response.
• The mMRC scale is a vital tool for nurses in assessing the functional impact of dyspnoea, particularly in patients with chronic respiratory diseases like COPD.
• It helps in staging disease severity, tracking progression over time, and evaluating the effectiveness of treatments and pulmonary rehabilitation.
• A higher mMRC score (e.g., ≥2) is associated with increased mortality and risk of hospitalisation in COPD patients.

How to Approach the Question

• First, identify the core task of the question, which is to classify a patient's symptom using a specific clinical scale (mMRC).
• Carefully read and isolate the patient's direct quote describing their breathlessness: 'I stop for breath after walking about 100 meters or after a few minutes on level ground.'
• Recognize that this statement is the key piece of data.
• Systematically compare this statement to the definition of each grade of the mMRC scale.
• Match the patient's statement to the grade that it describes verbatim.
• Select the option corresponding to the matched grade, confirming that it is a perfect fit.

Concept Tested & Keywords

• Concept Tested: Assessment of dyspnoea using the Modified Medical Research Council (mMRC) scale.
• Stem keywords: dyspnoea, mMRC scale, stop for breath, 100 meters
• Lead-in keywords: identify the grade
• Clinical cues: Patient statement: 'I stop for breath after walking about 100 meters or after a few minutes on level ground' - This is the key diagnostic clue that directly maps to a specific grade on the scale.
• Negative lead-in flag: false

Question ID

QUT_1tM3xjB0ZMaGRXCOSL

Copy ID

Reference Book

E6 Medicine Macleod Clinical Examination 15e p. 92-94

E6 Medicine Harrison 22e Part 1 p. 309-311