Best interests

Best interests is the test used to make a decision for someone who cannot make it themselves.

Updated 12 October 2026 (1 minute read)

Summary

  • It applies to children and to adults who lack capacity.
  • It is wider than medical benefit. The patient's own wishes, feelings, beliefs and values must be considered, and the people close to them consulted.
  • If doctors and the family cannot agree, a court decides.

In practice

In Hong Kong

  • The Medical Council of Hong Kong's code says that where parents refuse treatment that is clearly in a child's best interests, particularly treatment needed to save the child's life, the doctor should consider seeking legal advice (section 2.12.5).
  • For an unconscious patient, the family's views should be considered, provided they fit with the patient's best interests and the patient's right to decide for themselves (section 2.13.1).

Interview questions

  • Who decides what is in a child's best interests?
  • Is keeping a patient alive always in their best interests?
  • How would you find out what an unconscious patient would have wanted?

Sources

  1. The National Archives, case lawcaselaw.nationalarchives.gov.uk/…/2556
  2. legislation.gov.uklegislation.gov.uk/…/4
  3. Medical Council of Hong Kongmchk.org.hk/…/Code_of_Professional_Conduct_%28English_Version%29_%28Revise

Practise answering these with a mentor

Our interview preparation has you answer questions like these out loud, with feedback on each answer.

More NHS hot topics, medical ethics case studies and medical school interview questions are in AlphaMED Resources, which we add to and update through the application cycle.