Consent ✅

✍️ Consent means a patient gives permission before an examination, investigation, procedure or treatment. For consent to be valid it must be voluntary, informed and given by a person with capacity. Consent is not just a signature on a form; it is a shared decision-making conversation.

Consent ✍️

Consent is a core part of medical ethics, clinical law and good medical practice. It protects patient autonomy by ensuring patients are involved in decisions about their body, treatment and risks. In UK practice, the GMC emphasises that good consent depends on an exchange of information between clinician and patient, with time and support for the patient to understand the options.

The 3 requirements for valid consent ✅

• Voluntary: the decision is made freely, without coercion or pressure from staff, relatives or others.
• Informed: the patient receives relevant information about benefits, risks, alternatives and what happens if no treatment is given.
• Capacity: the patient can understand, retain, use or weigh the information and communicate a decision.

Shared decision-making 🗣️

Modern consent is not “doctor tells, patient signs”. It is a dialogue where the clinician explains reasonable options and the patient’s values help decide what is right for them. A small statistical risk may be highly important if it affects the patient’s work, family role, religion, fertility, independence or personal priorities.

What information should be discussed? 📋

• The diagnosis or suspected diagnosis.
• The purpose of the proposed treatment or investigation.
• The expected benefits.
• Material risks and common side effects.
• Reasonable alternative options.
• The option of doing nothing.
• Likely consequences if treatment is declined.
• Practical issues such as recovery time, pain, follow-up and restrictions.
• Who will perform the procedure, if relevant.

Material risk ⚖️

A material risk is a risk that a reasonable person in the patient’s position would likely attach significance to, or a risk that the clinician knows, or should know, this particular patient would consider important. This reflects the Montgomery approach: consent must be patient-centred, not merely based on what doctors traditionally disclose.

Types of consent 📝

Capacity 🧠

Capacity is decision-specific and time-specific. A patient may have capacity for a simple blood test but not for complex high-risk surgery. Capacity should not be judged simply by whether the patient agrees with the doctor.

• Can the patient understand the relevant information?
• Can they retain it long enough to decide?
• Can they use or weigh the information?
• Can they communicate their decision?

If the patient lacks capacity 🛡️

If an adult lacks capacity, decisions should usually be made in their best interests, following the Mental Capacity Act principles in England and Wales. Consider previous wishes, values, beliefs, advance decisions, lasting power of attorney, family views and the least restrictive option.

• Do not assume incapacity because of age, disability, dementia, delirium or mental illness.
• Support the patient to decide where possible.
• Treat reversible causes such as pain, hypoxia, sepsis, delirium or medication effects.
• Use best interests decision-making if capacity is lacking.
• Seek senior, legal or safeguarding advice for serious disputes or high-risk decisions.

Refusal of treatment 🚫

A capacitous adult can refuse treatment, even if the refusal seems unwise or may lead to serious harm or death. The clinician should check understanding, explore concerns, offer alternatives and document the discussion carefully.

• Check the patient understands the likely consequences.
• Explore fear, misunderstanding, pain, culture, religion and previous experiences.
• Offer time, written information or a second opinion where appropriate.
• Do not coerce the patient.
• Document the refusal and safety-netting advice.

Children and young people 👶

Consent in children depends on age, maturity and the decision. Young people aged 16 or 17 are generally presumed able to consent to treatment. Children under 16 may consent if they are Gillick competent, meaning they have enough understanding and intelligence to understand the proposed decision.

• Involve children and young people in decisions as much as possible.
• Assess understanding, maturity and ability to weigh information.
• Parental responsibility may allow consent for a child who lacks competence.
• Complex refusal of serious treatment needs senior and legal advice.

Emergencies 🚑

In an emergency, treatment may proceed without consent if it is immediately necessary to save life or prevent serious deterioration and the patient lacks capacity at that moment. The treatment should be limited to what is necessary, and the reasons should be explained when the patient recovers.

• Act in the patient’s best interests.
• Use the least restrictive urgent intervention.
• Document why consent could not be obtained.
• Explain afterwards when possible.

Consent forms 📄

A signed consent form is evidence that a discussion occurred, but it is not proof that consent was valid. The quality of the conversation matters more than the form itself.

• Record the procedure or treatment discussed.
• Record material risks and important alternatives.
• Record the patient’s questions and concerns.
• Record capacity assessment if relevant.
• Record interpreter, advocate or family involvement if used.

Common exam and ward pitfalls ❌

• Thinking a signature alone equals valid consent.
• Not discussing reasonable alternatives.
• Failing to mention material risks.
• Assuming relatives can consent for an adult with capacity.
• Assuming dementia automatically means no capacity.
• Ignoring a capacitous refusal because the decision seems unwise.
• Using jargon instead of checking understanding.
• Not documenting the discussion.

Makindo exam summary 🎯

For exams, think: valid consent = voluntary + informed + capacity. The best answer is usually to explain the procedure, benefits, material risks, alternatives and consequences of no treatment, check understanding, support decision-making and document the discussion. A consent form supports the process but never replaces the conversation.

References 📚

• General Medical Council. Decision making and consent. GMC professional standards. Guidance came into effect 9 November 2020 and was updated 13 December 2024.
• NHS. Consent to treatment. NHS patient information.
• Mental Capacity Act 2005. England and Wales.
• Montgomery v Lanarkshire Health Board [2015] UKSC 11.
• Gillick v West Norfolk and Wisbech Area Health Authority [1985] UKHL 7.

Disclaimer 📚

This article is for medical education and revision only. Consent decisions should follow GMC guidance, local Trust policy, mental capacity legislation, safeguarding procedures and senior or legal advice where needed.