[Postanesthesia cognitive dysfunction].

Area of Science:

• Anesthesiology
• Neuroscience
• Gerontology

Context:

• Post-anesthesia cognitive dysfunction is a complex issue influenced by surgery, underlying disease, and post-operative treatments.
• Anesthetic agents typically allow for rapid initial cognitive recovery (hours to days), but this can be hindered by medications like analgesics.
• Acute cognitive impairment, such as postoperative delirium, affects at-risk patients (e.g., elderly, major surgery) and requires monitoring.

Purpose:

• To investigate the incidence and duration of cognitive dysfunction following anesthesia and surgery.
• To identify risk factors and patient populations susceptible to persistent cognitive deficits.
• To differentiate the effects of anesthesia from surgical and post-operative factors on cognition.

Summary:

• Cognitive impairment is observed in approximately 40% of patients one week after general anesthesia, irrespective of age.
• Loco-regional anesthesia appears to slightly reduce the risk of cognitive dysfunction compared to general anesthesia.
• At three months post-surgery, 10-15% of patients over 60 and 6% of younger patients still exhibit cognitive dysfunction.

Impact:

• Highlights the need for comprehensive cognitive monitoring in patients post-anesthesia and surgery, particularly in elderly and at-risk individuals.
• Suggests that anesthesia type may influence the risk and severity of cognitive impairment.
• Underscores the unknown long-term cognitive impact in patients with pre-existing neurological conditions and calls for further research into underlying mechanisms.