====== Glasgow Coma Scale Pupils Score ======

The [[Glasgow Coma Scale]] [[Pupil]]s Score (GCS-P) was described by Paul Brennan, Gordon Murray, and Graham Teasdale in [[2018]] as a strategy to combine the two key indicators of the severity of [[traumatic brain injury]] into a single simple index.

Calculation of the GCS-P is by subtracting the Pupil Reactivity Score (PRS) from the Glasgow Coma Scale (GCS) total score:

GCS-P = GCS – PRS

The Pupil Reactivity Score is calculated as follows.

Pupils unreactive to light - Pupil Reactivity Score

Both pupils - 2

One pupil - 1

Neither pupil - 0

The GCS-P score can range from 1 and 15 and extends the range over which early severity can be shown to relate to outcomes of either mortality or independent recovery.

The GCS-P is a useful predictor of 30-day mortality, although its usefulness for other clinical outcomes remains to be proven
((Maye H, Waqar M, Colombo F, Lekka E. External validation of the GCS-Pupils Score as an outcome predictor after traumatic brain injury in adults: a single-center experience. Acta Neurochir (Wien). 2023 Feb;165(2):289-297. doi: 10.1007/s00701-022-05431-3. Epub 2022 Dec 9. PMID: 36484865.)).