Which patient population is at risk for postoperative cognitive dysfunction after anesthesia?

• A. Elderly
• B. Children
• C. Young adults
• D. Athletes

Answer: (A)

Older adults are most at risk for postoperative cognitive dysfunction because the aging brain has less cognitive reserve and is more vulnerable to the combined stress of surgery and anesthesia. Many elderly patients already have some baseline cognitive changes or vascular brain changes, and age-related shifts in brain structure and function (such as slower processing speed and reduced plasticity) mean that inflammatory and hemodynamic challenges during and after surgery can more easily disrupt neuronal signaling. Systemic inflammation from the surgical insult, along with potential fluctuations in blood pressure and anesthetic effects, can trigger neuroinflammatory processes that the aging brain struggles to recover from, leading to cognitive decline that can emerge days to weeks after the procedure and persist for some time. Delirium is also more common in this population and is a related risk factor, underscoring greater vulnerability to postoperative brain dysfunction in the elderly.