Oxford Scale

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Original Editor - Justin Bryan

Top Contributors - Justin Bryan and Kim Jackson  

Objective[edit | edit source]

The Medical Research Council (MRC) Muscle Scale, developed by the UK Medical Research Council, is a scale of measuring the power or strength produced by muscle contraction. The scale was originally described in the paper Aids to the Investigation of Peripheral Nerve Injuries (War Memorandum No. 7), released in 1943. Measurement is scored on a 0 to 5 scale, with 5 representing maximal strength.[1]

The Medical Research Council Sum-Score (MRC-SS) was developed in the late 1980s and first described by Kleyweg, Van Der Meché, and Schmitz (1991) as a tool for assessing and tracking general muscle strength in individuals with Guillian-Barré syndrome. Currently though, the MRC-SS is a tool commonly used to determine the presence of and/or track the development of Intensive Care Unit (ICU) Acquired Weakness.[2][3]

Intended Population[edit | edit source]

Originally developed for use with patients diagnosed with Guillian-Barré syndrome, including those who were considered bedbound or were receiving mechanical ventilation. Presently, MRC-SS is still used for patients who are bedbound or receiving mechanical ventilation, but its use has been expanded to the more general critical care and ICU populations.[2][3]

Method of Use[edit | edit source]

Reference
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Evidence[edit | edit source]

Reliability[edit | edit source]

Validity[edit | edit source]

Responsiveness[edit | edit source]

Miscellaneous
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Links[edit | edit source]

References[edit | edit source]

  1. UK Research and Innovation. MRC Muscle Scale. Available from: https://www.ukri.org/councils/mrc/facilities-and-resources/find-an-mrc-facility-or-resource/mrc-muscle-scale/ (accessed 27 Jan 2023).
  2. 2.0 2.1 Kleyweg RP, Van Der Meché FG, Schmitz PI. Interobserver agreement in the assessment of muscle strength and functional abilities in Guillain-Barré syndrome. Muscle & Nerve 1991; 14(11): 1103-1109
  3. 3.0 3.1 Connolly B, Thompson A, Moxham J, Hart N. Relationship Of Medical Research Council Sum-Score With Physical Function In Patients Post Critical Illness. American Journal of Respiratory and Critical Care Medicine 2012;185:A3075.