Summary
The Glasgow Coma Scale permits 120 possible mathematical combinations of eye, verbal and motor scores. Out of these only about 15 are clinically valid and useful in the assessment of altered consciousness. A mathematical analysis of this pruned scale shows a predominant skew towards the motor response. Without clinically altering, the scale. The numerical values can be modified to produce a more equitable dominance by each of the factors and greater precision. This is also necessary as the value of a unit is the same in the sum score, whether contributed by the eye, verbal or motor elements.
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References
Bouzarth WF, Lindermuth JR (1978) Head injury watch sheet modified for a digital scale. Trauma 18: 571–579
Fisher CM (1969) The neurological examination of the comatose patient. Acta Neurol Scand [Suppl] 36: 1–56
Jennett B, Bond M (1975) Assessment of outcome after severe brain damage: a practical scale. Lancet 1: 480–484
Jennett B, Teasdale G (1977) Aspects of coma after severe head injury. Lancet 1: 878–881
Jennett B, Teasdale G (1981) Management of head injuries. Davis, Philadelphia, pp 95–151
Ommaya AK (1966) Trauma to the nervous system. Ann R Coll Surg Engl 39: 317–347
Plum F, Posner JB (1972) The diagnosis of stupor and coma. Davis, Philadelphia
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Bhatty, G.B., Kapoor, N. The Glasgow Coma Scale: A mathematical critique. Acta neurochir 120, 132–135 (1993). https://doi.org/10.1007/BF02112031
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DOI: https://doi.org/10.1007/BF02112031