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Development and Implementation of a Multi-Disciplinary Technology Enhanced Care Pathway for Youth and Adults with Concussion

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Cognitive trajectories after postoperative delirium.

Jane S Saczynski¹, Edward R Marcantonio, Lien Quach

¹Division of Geriatric Medicine and Meyers Primary Care Institute, University of Massachusetts Medical School, Worcester, MA 01605, USA. jane.saczynski@umassmed.edu

The New England Journal of Medicine

|July 6, 2012

Summary

This summary is machine-generated.

Postoperative delirium after cardiac surgery is linked to significant cognitive decline, especially in the first year. Patients experiencing delirium show a prolonged impairment in cognitive function compared to those who do not.

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Area of Science:

Gerontology
Neuroscience
Cardiology

Background:

Delirium is a frequent complication following cardiac surgery.
It may be associated with lasting cognitive deficits.
Understanding the cognitive trajectory post-cardiac surgery is crucial.

Purpose of the Study:

To investigate postoperative delirium in elderly patients undergoing cardiac surgery.
To analyze the cognitive function changes during the first year after surgery.
To determine the long-term impact of delirium on cognitive performance.

Main Methods:

225 patients aged 60+ undergoing coronary-artery bypass grafting or valve replacement were enrolled.
Cognitive function was assessed using the Mini-Mental State Examination (MMSE) preoperatively and at 1, 6, and 12 months post-surgery.
Delirium was diagnosed using the Confusion Assessment Method; adjusted models controlled for covariates.

Main Results:

Patients who developed delirium had lower preoperative MMSE scores and a greater initial drop in cognitive function.
Delirium was associated with significantly lower cognitive function at 1 month and 1 year post-surgery.
A higher percentage of patients with delirium did not return to their baseline cognitive level by 6 months.

Conclusions:

Delirium significantly impacts cognitive ability in the year following cardiac surgery.
The cognitive trajectory after delirium is marked by an initial sharp decline and sustained impairment.
Early identification and management of delirium are important for long-term cognitive outcomes.