• Elaine Tang, Mairi Laverty, Alexander Weir, Elizabeth S Wilson, Timothy S Walsh, Mike Allerhand, Stuart Parks, MacLullich Alasdair M J AMJ ... more Edinburgh Delirium Research Group, Royal Infirmary of Edinburgh, University of Edinburgh, 51 Little France Crescent, Edinburgh EH16 4SA, UK; C, and Zoë Tieges. less
• Department of Psychology, University of Edinburgh, 7 George Square, Edinburgh EH8 9JZ, UK; Edinburgh Delirium Research Group, Royal Infirmary of Edinburgh, University of Edinburgh, 51 Little France Crescen... more t, Edinburgh EH16 4SA, UK. less
• J Crit Care. 2018 Dec 1; 48: 104-111.

PurposeDelirium in the ICU is under-diagnosed. We evaluated feasibility and performance of a novel smartphone-based test for objectively detecting inattention in delirium.Material And MethodsDelApp-ICU combines a behavioural assessment and an attention task, whereby participants follow simple commands and count serially presented circles (score range 0-12, lower scores indicating worse performance). We assessed feasibility through staff interviews. Then we performed a preliminary case-control study in patients with and without delirium (ascertained with the Confusion Assessment Method for the ICU) who underwent the DelApp-ICU on up to 4 days.ResultsForty-six patients (median age = 57.5 years, range 18-83) were assessed 89 times in total (N's = 46, 29, 10 and 4 for subsequent assessments; 33.7% delirious). DelApp-ICU scores were lower in delirium (N = 20; median = 0.5, Inter-Quartile Range (IQR) = 0-4.75) compared to no delirium (N = 26, median = 12, IQR = 8-12) on days 1, 2 and 3 (p < 0.001, p < 0.001 and p < 0.05, respectively). A DelApp-ICU score ≤6 was 100% sensitive and 96% specific to delirium on day 1. Positive and Negative Predictive Values were 91% and 100%, respectively. DelApp-ICU scores were responsive to changes in CAM-ICU status.ConclusionsDelApp-ICU shows promise for assessing inattention and delirium in ICU patients, including longitudinally monitoring deficits and providing a metric of delirium severity.Copyright © 2018 Elsevier Inc. All rights reserved.

21 keywords...

hide…