Poster presentation Early career development| Volume 90, ISSUE 10, e18, October 2009

Poster 22: Further Investigation of Resolution of the Acute Confusion (delirium) in the Acute Period Following Traumatic Brain Injury

      Objective: To partially replicate a study by Stuss et al. (1999) investigating memory and attention impairments, and extending the investigation by adding measures of executive function, sleep-wake cycle and semantic comprehension. Design: Retrospective chart analysis. Setting: Inpatient rehabilitation. Participants: Ninety patients with moderate to severe, non-penetrating traumatic brain admitted to inpatient brain injury rehabilitation at 60 days or less since date of injury. Interventions: None. Main Outcome Measures: The Orientation-Log, the Cognition-Log and the Delirium Diagnostic Tool-Provisional. Results: As in the Stuss et al, study, the Sign Test with P<.05 was used to compare time from injury to normal range performance between pairs of measures. Measures of attention and memory impairments had a similar pattern of recovery to that previously found. Executive functions also cleared in a similar temporally distinguishable pattern. More difficult measures of attention and memory persisted after resolution of delirium/confusion. Conclusions: This study provides further support that the acute period following traumatic brain injury is better described as a period of delirium or acute confusion rather than simply post traumatic amnesia and that recovery of cognitive and other features of delirium happen in predictable patterns.

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