For families · Free checker · By an anesthesiologist
Suddenly confused after surgery — is this delirium?
You know their normal better than anyone in the hospital. If your parent or partner isn't themselves after an operation, check the four signs below — and know exactly what to say to the nurses tonight.
🚨 Skip the checker — get staff NOW (or call 911 at home) if they:
can't be woken · have new one-sided weakness or a drooping face · new trouble speaking · a seizure · hit their head in a fall. These need urgent assessment, not a checklist.
Quick answer
Post-op delirium has four hallmarks: it starts suddenly (a clear change from their normal), it comes and goes over the day (often worse in the evening), they can't hold attention, and their thinking or alertness is altered — rambling and agitated, or the easily-missed quiet form (unusually drowsy and withdrawn). It's common in older patients after major surgery, has treatable triggers (infection, pain, dehydration, medication), and is usually temporary. Tell the nurses the moment you notice it — say the word "delirium."
Compared with their normal self, in the last day or two:
The family bedside card — what actually helps
✅ Do
- • Glasses ON, hearing aids IN — first, always
- • Say who you are; short, calm sentences
- • Gently reorient: day, place, "you had your operation"
- • Familiar photos, blanket, their own glasses case
- • Days bright & moving; nights dark & quiet
- • Encourage drinking, eating, and getting up (as allowed)
🚫 Don't
- • Don't quiz them ("Do you know who I am?") — it frightens
- • Don't argue with what they believe they saw — redirect instead
- • Don't crowd the bed with visitors and noise
- • Don't assume drowsy-and-quiet is fine — report it
- • Don't take accusations personally — it's the delirium talking
Frequently asked questions
Is confusion after surgery normal in elderly patients?
It's common — postoperative delirium affects a significant share of over-65s after major surgery — but 'common' doesn't mean 'ignore it.' Delirium is a medical condition with findable triggers (infection, pain, dehydration, medication, a full bladder, constipation) that the team can treat, and treating it early shortens it. The moment you notice your person isn't their normal self, tell the nursing staff and use the word 'delirium.'
What are the signs of postoperative delirium?
Four hallmarks: it starts SUDDENLY (hours to days after surgery, a clear change from their normal); it FLUCTUATES (worse in the evening, near-normal in the morning); they CAN'T FOCUS (lose the thread mid-sentence, drift off); and their thinking or alertness is altered — either rambling and suspicious, or the easily-missed quiet form: unusually drowsy, flat and withdrawn. The quiet (hypoactive) form is the most dangerous because nobody reports it.
How long does post-op delirium last?
Usually days — most cases settle within about a week as triggers are treated and the body recovers, though in some older patients it can wax and wane for longer. Recovery is gradual: expect good hours before good days. It is usually temporary; having had delirium does deserve mention at future hospital visits, because it tends to recur.
What can family actually do for delirium at the bedside?
A lot — family is genuinely part of the treatment. Get their glasses on and hearing aids in. Say who you are; don't test them ('do you know who I am?' frightens). Speak in short, calm sentences. Gently reorient — day, place, why they're here — without arguing about what they believe they saw. Bring familiar objects and photos. Keep days bright and active, nights dark and quiet. And report what you see to the nurses: you know their normal better than anyone in the building.
When is confusion after surgery an emergency?
Get staff immediately (or call emergency services if at home) if the person can't be woken, has new one-sided weakness or face droop, new trouble speaking, a seizure, or a head injury from a fall. Those aren't delirium questions — they need urgent assessment now.