The Four Pillars of Medical Ethics

The four pillars of medical ethics — autonomy, beneficence, non-maleficence, and justice — were systematised by Tom Beauchamp and James Childress in their landmark text Principles of Biomedical Ethics (first published 1979). This framework is the single most important ethical model for SJT preparation.

This lesson explores each pillar in depth, examines how they conflict with one another, and provides a decision-making framework for resolving these conflicts in SJT scenarios.

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The Framework at a Glance

Pillar	Core question	SJT relevance
Autonomy	Is the patient's right to choose being respected?	Consent, confidentiality, patient refusal
Beneficence	Is this action in the patient's best interest?	Treatment decisions, going the extra mile
Non-maleficence	Could this action cause harm?	Patient safety, recognising limits, reporting errors
Justice	Is this fair to all parties?	Resource allocation, equal treatment, non-discrimination

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Pillar 1: Autonomy — Respecting Self-Determination

The Principle

Autonomy means respecting a person's right to make their own informed decisions about their own life and body. In healthcare, this translates into obligations around consent, information sharing, and confidentiality.

Key Components

Component	Explanation
Informed consent	A patient must receive adequate information, understand it, and agree voluntarily before any treatment
Right to refuse	A competent patient can refuse any treatment, including life-saving treatment
Confidentiality	A patient's information belongs to them; sharing it without consent violates autonomy
Truth-telling	Patients have a right to know their diagnosis and prognosis
Shared decision-making	Healthcare should be a partnership, not a paternalistic imposition

Autonomy in SJT: Common Scenarios

Scenario 1: The competent refusal

A patient with capacity refuses a blood transfusion on religious grounds. The medical team believes the transfusion is necessary to save their life.

The autonomy answer: Respect the patient's decision. Ensure they fully understand the risks of refusal. Document the discussion. Explore alternative treatments. Do not override their choice.

Scenario 2: The information request

A patient asks you directly about their test results. You have seen the results, which show a serious diagnosis, but the consultant has not yet spoken to the patient.

The autonomy answer: The patient has a right to their information. However, delivering a serious diagnosis requires skill and support. Acknowledge their question, explain that the consultant will discuss the results with them very soon, and ensure the consultant is aware of the patient's request. Do not lie or deflect.

When Autonomy Is Limited

Autonomy is not absolute. It can be overridden when:

Situation	Justification
The patient lacks capacity for the specific decision	They cannot understand, retain, weigh, or communicate the decision
There is risk of serious harm to others	Public safety can override individual autonomy (e.g., notifiable diseases)
Children are involved	Parental consent or Gillick competence applies
Legal requirements mandate disclosure	Court orders, statutory reporting obligations

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Pillar 2: Beneficence — The Duty to Do Good

The Principle

Beneficence requires healthcare professionals to act in the patient's best interest — to actively promote their wellbeing, not merely avoid harm.

Key Components

Component	Explanation
Best interest	Considering the patient's medical needs, preferences, and overall wellbeing
Proportionality	Benefits of treatment should outweigh risks and burdens
Advocacy	Speaking up on behalf of patients who cannot advocate for themselves
Proactive care	Not just responding to problems, but anticipating and preventing them

Beneficence in SJT: Common Scenarios

Scenario: The overwhelmed patient

An elderly patient is about to be discharged but seems confused about their medication regimen. The ward is busy and the discharge coordinator has already completed the paperwork.

The beneficence answer: Take time to ensure the patient understands their medications. Arrange for written instructions. Consider whether a follow-up phone call or community support would help. Do not discharge a patient who is not ready simply because the paperwork is done.

The Paternalism Trap

Beneficence taken too far becomes paternalism — making decisions "for the patient's own good" without their consent.

Beneficence (appropriate)	Paternalism (inappropriate)
Advising a patient strongly to have a test	Ordering a test without informing the patient
Explaining the risks of refusing treatment	Withholding information because "it would upset them"
Advocating for the patient's best interest	Overriding the patient's expressed wishes

SJT principle: Beneficence must always be exercised within the bounds of autonomy. You can strongly recommend a course of action, but you cannot force it on a competent patient.

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Pillar 3: Non-Maleficence — First, Do No Harm

The Principle

Non-maleficence is the obligation to avoid causing harm. The Latin phrase primum non nocere ("first, do no harm") captures its primacy — when in doubt, avoid actions that could injure the patient.

Key Components

Component	Explanation
Recognising limits	Not attempting procedures or treatments beyond your competence
Reporting errors	Disclosing mistakes so they can be addressed and prevented
Risk assessment	Weighing potential harms before acting
Omission as harm	Failing to act when action is needed can also cause harm
Systemic safety	Contributing to systems and cultures that reduce errors

Non-Maleficence in SJT: The Priority Principle

In SJT, non-maleficence typically takes priority over all other principles when there is a direct, immediate risk of harm.

The hierarchy in practice: