Search

Background: Automated pupillometry is becoming widely accepted as an objective measure of pupillary function, especially in neurocritical care units. Normative reference values and thresholds to denote a significant change are necessary for integrating automated pupillometry into practice., Objective: Providing point estimates of normal ranges for pupillometry data will help clinicians intuit meaning from these data that will drive clinical interventions., Methods: This study used a planned descriptive analysis using data from a multicenter registry including automated pupillometry assessments in 2140 subjects from 3 US hospitals collected during a 3-year period., Results: We provide a comprehensive list of admission pupillometry data. Our data demonstrate significant differences in pupillary values for Neurological Pupil Index, latency, and constriction velocity when stratified by age, sex, or severity of illness defined by the Glasgow Coma Scale score., Conclusion: This study provides a greater understanding of expected distributions for automated pupillometry values in a wide range of neurocritical care populations.

Background: A change in the pupillary light reflex (PLR) is a sensitive indicator for detecting expanding intracranial lesions. Changes in PLR may be a prognostic marker for patients with intracranial lesions. The purpose of this analysis was to explore how PLR readings, size, constriction velocity (CV), dilation velocity (DV), Neurologic Pupil Index (NPi), and latency predict clinical outcome in patients with subarachnoid hemorrhage., Methods: This is a secondary analysis of prospectively collected multicenter registry data. The within-subject standard deviation (WSD) of PLR values, NPi, size, CV, DV, and latency were explored as predictors of discharge modified Rankin Scale (mRS) in patients with subarachnoid hemorrhagic., Results: Among 4403 pupillary readings from 82 patients with a diagnosis of subarachnoid hemorrhage, with a mean age of 57.7 years, the admission Glasgow Coma Scale median score was 14 (eye, 4; verbal, 4; motor, 6), and the mRS median was 0 on admission and 4 at discharge. Correlation between standard deviation of PLR values and discharge mRS was moderate and negative (r = -0.3 to -0.47, P < .01). The standard deviations for NPi, size, CV, and DV were significant for predicting discharge mRS (r = 0.23-0.28, P < .05) after controlling for admission Glasgow Coma Scale., Conclusion: Patients with higher WSD PLR values showed better outcomes (ie, lower mRS at discharge), suggesting that patients with narrower WSD PLR are at a higher risk for poor outcomes.