01Principles and purposeThe professional or clinical skill and the decisions it supports.
Valid consent brings together capacity, adequate decision-specific information and voluntariness. The clinician first identifies clinically reasonable options, then learns what matters to the patient so that information about benefit, burden, uncertainty and alternatives is tailored rather than delivered as a generic list. Consent may be expressed verbally, in writing or through conduct, depending on the intervention and context. The evidential value of a signed form is limited if the patient was not supported to understand the choice.
The GMC standards apply across the UK, while the detailed legal rules differ by jurisdiction and age. In England and Wales, the Mental Capacity Act 2005 governs decisions for people aged 16 and over who lack capacity. Scotland uses the Adults with Incapacity (Scotland) Act 2000; Northern Ireland has its own evolving statutory and common-law framework. For children, parental responsibility, the young person’s maturity and competence, the nature of the decision and local legal advice may all matter. Do not transplant an England-and-Wales rule into another jurisdiction.
Key points
- Consent is a continuing process of dialogue, not a signature. Confirm the decision, the person’s understanding and freedom from pressure before proceeding, and revisit consent when the plan or circumstances change.
- Start with the patient’s values and information needs. Explain the proposed option, reasonable alternatives including no treatment, and benefits and harms that this individual would consider significant.
- Give information in an accessible form, invite questions, check understanding and allow time where the decision permits. Arrange an interpreter or communication support rather than relying on a convenient relative for complex decisions.
- Presume an adult has capacity. A surprising refusal does not prove incapacity; explore understanding, expectations, coercion and reversible barriers while respecting a capacitous choice.
- A consent form records part of the process but cannot repair a poor conversation. Document who decided, what mattered, options discussed, important uncertainties, questions answered and the final plan.
- Emergency necessity can justify immediately required treatment when an adult cannot decide and delay risks serious deterioration, but the intervention must be proportionate and directed to the person’s overall benefit.
02Situations and prioritiesThe context, relevant information and actions that matter most.
Even familiar interventions deserve a proportionate dialogue. Establish the purpose, likely outcome, burdens and alternatives, then focus time on consequences that could change this person’s decision. Familiarity to the clinician does not make a risk immaterial to the patient.
When options trade longevity, function, fertility, independence, symptom relief or treatment burden differently, elicit priorities before recommending. A patient may reasonably attach greater weight to an uncommon but serious outcome because of work, caring duties, beliefs or previous experience.
A controlling companion, inconsistent answers, fear, financial dependence or a request to speak for the patient calls for a private conversation where safe. Voluntariness can be undermined without overt threats; assess whether the decision reflects the patient’s own wishes and offer appropriate safeguarding support.
Check that the patient understands the likely consequences and explore what drives the choice. A capacitous adult may refuse offered treatment, including life-sustaining treatment, but cannot require a clinician to provide treatment that is not clinically appropriate. Explain reasons and routes to a second opinion.
03Assessment and interpretationHow to gather information, assess the situation and recognise uncertainty.
Consider the information, its meaning and its limitations before deciding what follows.
- 01
Decision and option map - Why
- Define exactly what decision is required and which clinically reasonable choices exist.
- Interpretation and limitations
- A broad consent to “care” is insufficient for a specific material decision. Clarify the proposed intervention, alternatives, the option of no action, timing and which elements can be decided separately.
- 02
Patient priorities enquiry - Why
- Discover outcomes, burdens and uncertainties that are material to this individual.
- Interpretation and limitations
- Ask what the patient hopes to achieve, fears, needs to preserve and has experienced before. Use these answers to select and frame information; do not infer values from age, disability, culture or occupation.
- 03
Understanding check - Why
- Assess whether communication has produced usable understanding rather than passive agreement.
- Interpretation and limitations
- Invite the patient to explain the choice and likely consequences in their own words. Misunderstanding prompts explanation, visual material, interpreter support or more time; it is not automatically evidence of incapacity.
- 04
Voluntariness and authority check - Why
- Confirm that the decision is free and made by the person legally entitled to decide.
- Interpretation and limitations
- Speak privately when influence is possible and clarify the role of relatives, attorneys or advocates. Relatives support and inform the process, but cannot consent for a capacitous adult merely because they are next of kin.
04Worked approachesCases with ordered reasoning, an action and a check of the outcome.
01Worked caseConsent before an operation with a personally material riskAn adult professional singer is considering elective thyroid surgery for a symptomatic benign nodule. The possibility of lasting voice impairment particularly matters to their work; surveillance is also clinically reasonable in this fictional case.+
- 1Frame the decision by confirming the indication, realistic goals, timing and all reasonable options, including continued surveillance and taking no immediate action.
- 2Ask what outcomes matter most. The patient identifies preservation of voice, relief of the local symptoms and recovery time as priorities, making lasting voice effects especially material to this decision.
- 3Explain likely benefits, common burdens, serious or personally significant risks, uncertainties and how the alternatives compare. Use absolute frequencies when reliable and clarify the limits of prediction.
- 4Invite the patient to restate the options and consequences, correct misunderstandings, offer written information and time, and answer questions without steering through fear or convenience.
- 5Final action: record the informed choice and proceed only when it remains voluntary; if the patient defers, arrange an appropriate review rather than treating delay as refusal.
- 6Verification: before surgery, reconfirm the planned procedure, any changed circumstances and the patient’s continuing agreement; document new questions and the response.
02Practical approachWhen a patient declines recommended treatmentAn adult with apparent capacity declines a clinically recommended blood transfusion for reasons grounded in a longstanding belief.+
- 1Assess urgency, decision specificity, understanding and freedom from pressure; provide an interpreter or private discussion if either is in doubt.
- 2Explain the likely consequences of refusal, feasible alternatives and their limitations, then check the patient can use that information in reaching the decision.
- 3Respect a capacitous refusal, alert the relevant team to the agreed limits and plan clinically appropriate alternatives; obtain senior or legal advice if uncertainty remains.
- 4Record the patient’s reasoning, information discussed, capacity conclusion, persons present and contingency plan, then review if clinical circumstances or wishes change.
03Urgent approachTreatment when the patient cannot decideAn unconscious adult arrives with life-threatening bleeding and no immediately available advance decision, welfare attorney or reliable evidence of prior wishes.+
- 1Confirm that the patient cannot decide now and that delay needed to investigate wishes or authority would expose them to serious harm.
- 2Seek readily available evidence of advance refusal, emergency-care plans, medication or identity information without delaying immediately necessary stabilisation.
- 3Provide proportionate treatment directed to overall benefit and the least restrictive effective course, limiting intervention to what the emergency requires.
- 4Document the necessity, information available and decisions; involve the patient as soon as capacity returns and review ongoing treatment through the ordinary consent process.
05Feedback, follow-up and evidenceReview outcomes, seek feedback and identify what to improve.
- Reconfirm consent when the intervention changes, a material new risk emerges, the patient’s condition or priorities alter, or there has been a meaningful delay between decision and treatment.
- After the intervention, compare the outcome and complications with what was discussed. Address unexpected harm openly and record the explanation, further care and any duty-of-candour process.
- Use feedback from interpreters, advocates, complaints, cancellations and patient-reported misunderstanding to improve the timing and accessibility of future consent conversations.
- For WPBA evidence, reflect on one decision where eliciting values changed the recommendation, while removing patient identifiers and linking learning to a specific communication behaviour.
06Special situationsVariants, exceptions and circumstances that change the usual approach.
Materiality is individual
A risk can matter because a reasonable person in the patient’s position would attach significance to it or because the clinician knows this patient would. Frequency alone does not determine materiality; severity, reversibility and personal consequences also matter.
Recommendation remains legitimate
Shared decision making does not require neutrality between options. Explain which option you recommend and why, relate that advice to the patient’s goals, disclose uncertainty and remain open to a different informed choice.
Delegation needs safeguards
Another suitably trained team member may support parts of the conversation, but the clinician performing or directing treatment remains responsible for ensuring valid consent and answering questions within competence.
Young people require a separate analysis
A 16- or 17-year-old and a younger competent child may consent in important circumstances, but refusal and conflict can raise different legal issues. Seek senior and legal advice early for serious disputed treatment.
07Common pitfallsFrequent interpretation and management errors.
- 01
Listing every conceivable complication while failing to identify what matters to the patient; information overload can obscure the decision rather than support it.
- 02
Treating a signature, a pre-assessment checklist or attendance for a procedure as conclusive evidence of informed and voluntary agreement.
- 03
Assuming a relative can authorise treatment for a capacitous adult, or asking relatives to decide when their proper role is to inform a best-interests or overall-benefit process.
- 04
Equating refusal, distress, language difference or an unwise choice with incapacity before providing support and applying the relevant legal test.