Brain Sciences (May 2022)

Neurological Pupil Index for the Early Prediction of Outcome in Severe Acute Brain Injury Patients

  • Federico Romagnosi,
  • Adriano Bernini,
  • Filippo Bongiovanni,
  • Carolina Iaquaniello,
  • John-Paul Miroz,
  • Giuseppe Citerio,
  • Fabio Silvio Taccone,
  • Mauro Oddo

DOI
https://doi.org/10.3390/brainsci12050609
Journal volume & issue
Vol. 12, no. 5
p. 609

Abstract

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In this study, we examined the early value of automated quantitative pupillary examination, using the Neurological Pupil index (NPi), to predict the long-term outcome of acute brain injured (ABI) patients. We performed a single-centre retrospective study (October 2016–March 2019) in ABI patients who underwent NPi measurement during the first 3 days following brain insult. We examined the performance of NPi—alone or in combination with other baseline demographic (age) and radiologic (CT midline shift) predictors—to prognosticate unfavourable 6-month outcome (Glasgow Outcome Scale 1–3). A total of 145 severely brain-injured subjects (65 traumatic brain injury, TBI; 80 non-TBI) were studied. At each time point tested, NPi p = 0.008; DeLong test) for 6-month neurological outcome prediction. NPi, assessed at the early post-injury phase, has a superior ability to predict unfavourable long-term neurological outcomes in severely brain-injured patients. The added prognostic value of NPi was most significant when complemented with baseline demographic and radiologic information.

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