Anaesthesia and dementia: preparing for a procedure

The anaesthesia team weighs the procedure's benefit against the person's health, medicines and usual cognitive ability. Dementia alone does not determine whether an operation can proceed.

Delirium is a sudden, fluctuating change in attention and awareness. It differs from the slower, persistent changes of dementia, although a person may have both. Surgery, pain, infection, dehydration, unfamiliar surroundings and some medicines can contribute to delirium.

Recovery may also involve temporary changes in mobility, eating, continence or ability to manage familiar tasks. Knowing the person's usual memory, communication and independence helps staff recognise a genuine change rather than assuming it is part of dementia.

Tell the surgical and anaesthesia teams about the diagnosis, previous confusion after illness or anaesthesia, allergies, hearing or vision needs, and every prescribed or non-prescribed medicine. Follow their instructions on fasting and which medicines to take on the day.

A familiar supporter can describe the person's normal behaviour and preferred communication. If permitted, bring glasses, hearing aids and familiar orientation aids. Afterward, calm explanations, daylight, sleep support, hydration, pain control and early safe movement may help recovery.

Alert clinical staff immediately if the person becomes suddenly difficult to wake, has trouble breathing, develops new weakness on one side, has a seizure, or cannot be kept safe. These signs should not be attributed to dementia.

After discharge, seek prompt advice for new or worsening confusion, fever, uncontrolled pain, inability to drink, repeated vomiting, reduced urination, a fall or an unexpected decline in walking. A treatable problem such as infection, dehydration or a medicine effect may be responsible.

Discuss the goal of the procedure, available anaesthesia approaches, likely effects on daily function, pain-control options and the discharge plan. Ask who can provide consent if decision-making capacity is impaired and what family support will be useful during recovery.