Principles of medical ethics: Autonomy, beneficence, nonmaleficence, and justice

Principlism is an approach to bioethics that helps guide ethical decision-making by using the four principles of: autonomy, beneficence, nonmaleficence, and justice. These principles help clinicians think through difficult decisions when patient and family preferences, clinical recommendations, risks, benefits, and limited resources don’t align.

Let’s start with autonomy. Autonomy refers to patients’ right to self-determination, meaning the right to make decisions about their own body, health, and care. Autonomy depends on decision-making capacity. A patient must be able to understand the information presented, appreciate how it applies to their situation, reason through their options, and clearly communicate a choice. Just as important, that decision must be made voluntarily, without coercion, pressure, or manipulation from clinicians, family members, or others.

In practice, it’s important to make sure patients with decision-making capacity have the information needed to make an informed decision. This is where informed consent and informed refusal come in.

Informed consent occurs when a patient chooses a treatment after understanding their diagnosis, the proposed intervention, the risks and benefits, and any reasonable alternatives.

On the flip side, informed refusal means a patient can decline a recommended treatment, or choose no treatment, after understanding the consequences of that decision.

Both of these depend on clear communication. Patients need information that is accurate, complete, and explained in a way they can understand. That’s where truth-telling plays a key role. Clinicians have an ethical obligation to be honest about diagnoses, prognosis, and treatment options.

Confidentiality also supports autonomy. Patients are more likely to share sensitive information when they trust that it will be kept private. This trust allows them to make more informed and meaningful decisions about their care.

Now, autonomy is very important and should be respected in most situations. However, there are also situations where autonomy may be limited. For example, in emergencies when immediate treatment is needed and the patient cannot provide consent; when patients request non-standard interventions; when a patient lacks decision-making capacity; or when a decision poses a serious risk of harm to others.

Here’s a legal connection! Patients have the legal right to accept or refuse medical treatment, as long as they have decision-making capacity. However, clinicians are not legally required to provide treatments that are not medically appropriate or outside the standard of care.

Alright, let’s turn to the principle of beneficence. Beneficence means “to do good” by acting in the best interest of the patient. It focuses on promoting well-being, relieving suffering, preventing harm, and supporting their quality of life.

In clinical practice, beneficence goes beyond treating disease. It includes addressing pain, supporting mental and emotional health, and considering how a patient’s condition and treatment will affect their daily life and future well-being.

Importantly, beneficence is not just about what clinicians think is best. It also requires understanding what matters most to the patient. This means considering the patient’s values, goals, and definition of quality of life when making recommendations.

Now that we’ve defined autonomy and beneficence, let’s look at how they can conflict. Alma is a 62-year-old woman with end-stage renal disease and heart failure with reduced ejection fraction. She presents to the emergency department reporting worsening shortness of breath and fatigue. She has been receiving hemodialysis for the past three years. The clinician recommends continuing dialysis and treating her fluid overload with medications and possible escalation of care.

Alma asks: “What happens if I stop dialysis?”

The clinician explains: “If dialysis stops, your kidney disease will progress, and you will likely die soon. We can talk about what comfort-focused care would look like if that is what you want.”

Alma is alert, oriented, and shows a full understanding of her condition. She responds: “I understand. I’m tired. I don’t want more dialysis. I want to go home and be comfortable.”

Her family adamantly disagrees: “You can’t just let her die. Please do everything.”

This is a conflict between autonomy and beneficence. From the family and healthcare team’s perspective, continuing dialysis would prolong life, so it supports beneficence. But the patient has capacity and clearly refuses dialysis, so autonomy should be respected.

A patient-centered approach would include acknowledging the family’s distress, confirming the patient’s decision-making capacity, clarifying the patient’s goals, and discussing options such as palliative or hospice care.

The healthcare team can all help support communication and make sure the patient and family understand the plan.