Delirium in Older Adults After Hospital Discharge: What Families Should Know

After returning home from hospital, an older adult may suddenly seem confused, unusually sleepy, restless or unlike themselves. A change developing over hours or days may be delirium. It deserves prompt medical assessment because it is often linked to an underlying physical problem that needs attention.

This article provides general education for families and caregivers. It is not intended to diagnose a condition or replace personalised advice from a qualified health professional.

1. What is delirium?

Delirium is a rapid change in attention, awareness or thinking that can fluctuate during the day. A person may have a clear conversation at one moment and be confused later. It can begin during a hospital stay or continue after discharge.

NICE identifies age 65 or older, dementia or other cognitive impairment, severe illness and hip fracture as important risk factors. Delirium can also occur in people without these factors.

2. Changes families may notice

• Sudden disorientation about the date, place or familiar people
• Difficulty paying attention, following a conversation or responding as usual
• Restlessness, agitation, wandering or seeing or hearing things that are not present
• Becoming unusually quiet, drowsy, withdrawn or less mobile
• Eating less or having a reversed sleepwake pattern
• Symptoms that improve and worsen within the same day

Quiet, sleepy or slowed behaviour may be hypoactive delirium, which is easily missed. Family members who know the persons usual behaviour can play an important role in identifying a new change.

3. How is delirium different from dementia?

Delirium usually develops over hours or days and fluctuates. Dementia generally progresses gradually over months or years. The two conditions can occur together and may be difficult to distinguish. Any new or rapidly worsening confusion should be treated as a significant change and assessed by a healthcare professional.

4. When to seek medical help

Sudden confusion requires urgent medical assessment. Contact the hospital or clinical team responsible for the persons care. If the older adult cannot be kept safe, is difficult to wake, has breathing difficulty, a seizure, sudden weakness or another emergency symptom, call Thailands emergency medical service on 1669.

Do not wait for the change to resolve on its own, and do not stop, add or reduce medicines based on guesswork. Possible contributors include infection, dehydration, low oxygen, pain, constipation, urinary retention, medicine effects and other medical problems that require assessment.

5. What caregivers can do while waiting for assessment

• Stay with the person and reduce the risk of wandering or falling.
• Speak slowly in short sentences and gently explain who you are, where they are and what is happening.
• Use comfortable lighting, reduce noise and avoid several people asking questions at once.
• Provide the persons usual glasses, hearing aids and dentures when safe.
• Prepare a medicine list, medical history, the time symptoms began and examples of what changed.
• Do not give extra sleeping tablets, sedatives or herbal products without professional advice.

If the person has a fluid restriction because of heart or kidney disease, follow the individual discharge plan rather than encouraging fluid beyond the recommended amount.

6. Supporting recovery and reducing modifiable risks

NICE recommends a multicomponent approach that considers medicines, hydration and constipation, nutrition, mobility, pain, vision and hearing, and sleep. Families can support a steady routine, keep a clock and calendar visible, provide familiar objects and avoid unnecessary changes of room or caregiver.

Follow the hospital discharge plan, scheduled reviews and personalised guidance about food, fluids, activity and medicines. Needs vary from one person to another.

7. Frequently Asked Questions

Can delirium get better?

Symptoms may improve when the underlying cause is addressed, but recovery time varies. Some people need days or weeks. Follow-up remains important, and delirium should not be dismissed as normal ageing.

Can someone with dementia also develop delirium?

Yes. Look for a new, rapid change from the persons usual memory, attention or behaviour rather than relying on the dementia diagnosis alone.

Should an older adult be kept awake all day?

They should not be forced to miss needed sleep. Encourage appropriate daytime activity and natural light, then reduce noise and interruptions at night according to the care plan.

8. Planning consistent and familiar care

During recovery, an older adult may need observation, medicine support, assistance with nutrition and mobility, and a predictable routine. Families considering short- or long-term support are welcome to contact Khunkha Nursing Home for general information and an initial, no-obligation discussion about care needs.

Sources: NICE: Delirium recommendations, NHS: Sudden confusion (delirium), NIH MedlinePlus: Delirium and Thailand National Institute for Emergency Medicine.