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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
PubMed
Summary
This summary is machine-generated.

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.

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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.