MRC scale(1) MRC breathlessness scale, MRC dyspnea. A clinical tool estimating the disability caused by dyspnea, which serves as a simple index of disease severity and extent in patients with idiopathic pulmonary fibrosis (IPF); its relationship with other common measures is not evaluated.
MRC dyspnea scale
1. Not troubled by breathlessness except on strenuous exercise.
2. Short of breath when hurrying or walking up a slight hill.
3. Walks slower than peers on level ground due to dyspnea, or must to stop for breath when walking at own pace.
4. Stops for breath after walking about 100m or after a few minutes on level ground.
5. Too breathless to leave the house, or breathless when dressing or undressing.
(2) A system developed by the Medical Research Council (UK) for testing muscle strength, in which the strength of 18 different muscle groups are evaluated and given a value of 1 to 5 (maximum MRS score, 90).
MRC Muscle Strength Scale
0. No movement is seen.
1. Only a trace of movement is seen or felt in the muscle; fasciculation is seen in the muscle.
2. Muscle can move only if the resistance of gravity is removed—e. g., elbow can be fully flexed only if the arm is maintained in a horizontal plane.
3. Joint can be moved against gravity without resistance. As an example, the elbow can be moved from full extension to full flexion starting with the arm hanging down at the side.
4. Muscle strength is reduced but muscle contraction can still move joint against resistance.
5. Muscle contracts normally against full resistance.