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Published on: September 20, 2018
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Clinical Manifestations
Tony Tan1,2, Ellene Yan1,2, Leif Erik Lovblom3,4
1Temerty Faculty of Medicine, University of Toronto, Toronto, ON, Canada.
Alzheimer'S & Dementia : the Journal of the Alzheimer'S Association
|December 24, 2025
Summary
Remote cognitive screening tools reveal that older surgical patients without cognitive impairment (CI) preoperatively may develop temporary CI post-surgery. This highlights the importance of virtual assessments for monitoring cognitive changes in elderly patients after surgery.
Area of Science:
- Gerontology
- Neuroscience
- Surgical Outcomes
Background:
- The COVID-19 pandemic spurred remote healthcare, including virtual cognitive screening.
- Assessing cognitive impairment (CI) in older surgical patients is crucial.
- Remote tools offer a viable method for perioperative cognitive evaluation.
Purpose of the Study:
- To evaluate the prevalence and trajectory of CI in older non-cardiac surgical patients.
- To assess cognitive function preoperatively and at 30, 90, and 180 days postoperatively.
- To determine the utility of remote cognitive screening tools in this population.
Main Methods:
- Older non-cardiac surgical patients (≥65 years) underwent virtual cognitive assessments.
- The Ascertain Dementia Eight-item Questionnaire (AD8) and Telephone Montreal Cognitive Assessment (T-MoCA) were used.
- Cognition was assessed preoperatively and at 30, 90, and 180 days postoperatively.
Main Results:
- Preoperative CI prevalence was 17% (AD8) and 26% (T-MoCA).
- Patients without preoperative CI showed an initial increase in CI at 30 days, followed by a decline.
- By 6 months, approximately 5% (AD8) and 8% (T-MoCA) developed CI.
Conclusions:
- Surgery can impact cognitive function in older adults previously without CI.
- Remote cognitive screening tools effectively monitor postoperative cognitive changes.
- These tools aid in identifying at-risk patients for timely intervention.
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