Synopsis
Assess the patient’s ability to make a specific surgical decision, support participation, and use the correct legal authority when urgent treatment cannot await recovery of capacity.
- Presume capacity and assess the particular decision at the time it must be made.
- Provide communication support and address reversible barriers before concluding that the patient cannot decide.
- An unwise refusal, a diagnosis of dementia or an inability to speak does not establish incapacity.
Key red flags
A patient who understood the operation yesterday may be unable to weigh information during delirium today. Look for a change from baseline and reversible causes such as hypoxia, infection, pain or metabolic disturbance. The urgency of the surgical problem determines how long reassessment can safely wait.
An unconscious patient with immediately life-threatening surgical disease may need treatment before a full meeting is possible. Search for readily available evidence of wishes and lawful restrictions without causing dangerous delay, obtain senior involvement, and provide only what is justified by the emergency and the patient’s interests.
Reasoning priorities
Identify what needs deciding and the clinical consequence of waiting.
Urgent does not always mean immediate. A short delay for an interpreter, hearing aids, analgesia or resuscitation may enable the patient’s own decision. Conversely, postponing source control or haemorrhage treatment for an administrative process may worsen the outcome.
Worked reasoning
An 81-year-old with bowel obstruction needs a decision about surgery within hours. They are intermittently inattentive, have not received their hearing aids and repeatedly say that surgery is a train journey. Their daughter asks to sign the consent form.
- First separate clinical urgency from the capacity question. Ask the senior surgeon how long assessment and treatment of reversible factors can safely take. Continue resuscitation and assessment of the obstruction while arranging hearing support, rather than allowing either task to obscure the other.
- Explain the operation and alternatives using short phrases in a quieter setting with the hearing aids available. Ask the patient to describe the problem and what could happen with or without treatment. Their response after support matters more than the initial confused exchange.
- If delirium still prevents understanding or weighing the surgical decision, record the impairment, the specific functional difficulty and the time of assessment. Do not conclude that they cannot make every decision, and do not interpret their daughter’s willingness as legal authority.
- Check for an applicable advance refusal and any legally authorised representative. Ask the daughter about the patient’s usual independence, values and expressed preferences. The responsible team uses that information alongside benefits, burdens and alternatives within the applicable jurisdictional framework.
- Agree and document the justified action, its scope, senior involvement and why further delay would or would not be safe. If necessary surgery proceeds on the appropriate lawful basis, continue involving the patient as far as possible and minimise restriction.
- When the acute illness improves, reassess capacity for ongoing choices and explain what was done and why. Ask whether the care plan reflects the patient’s own priorities now that they can participate; recovery of capacity changes who makes subsequent decisions.