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Cognition after major surgery in the elderly: test performance and complaints
J B Dijkstra1, P J Houx, J Jolles
1Maastricht Brain and Behaviour Research Institute, University of Maastricht, The Netherlands.
British Journal of Anaesthesia
|November 24, 1999
Summary
Major non-cardiac surgery in older adults causes temporary cognitive dysfunction, but cognitive complaints may stem from other factors like depression, not performance decline.
Area of Science:
- Gerontology
- Anesthesiology
- Neuroscience
Background:
- Older adults are at higher risk for cognitive dysfunction post-general anesthesia.
- Postoperative cognitive dysfunction (POCD) is a concern in elderly patients undergoing surgery.
Purpose of the Study:
- To investigate the severity and nature of POCD after major non-cardiac surgery in patients over 65.
- To assess cognitive complaints and their correlation with objective cognitive performance.
Main Methods:
- Cognitive function (memory, attention, processing speed) was tested before, 1 week, and 3 months post-surgery.
- Patients were compared to a control group of healthy individuals without surgery.
- Cognitive complaints were self-reported at 6 months post-surgery.
Main Results:
- Patients showed poorer performance in cognitive speed and information processing at 1 week post-surgery.
- Cognitive performance improved in both patients and controls by 3 months.
- At 6 months, 29% of patients reported cognitive decline, but this did not always align with objective test results.
Conclusions:
- Major non-cardiac surgery leads to short-term cognitive dysfunction in older patients, not long-term deficits.
- Postoperative cognitive complaints may be influenced by factors beyond objective cognitive performance, such as depression or age-related changes.