# Medical Ethics in Combined Training: Capacity, Consent, and Assent

## Introduction

Med-peds physicians navigate ethical decision-making across the full age spectrum, from neonates to elderly adults. The principles of **autonomy, beneficence, non-maleficence, and justice** apply universally, but their application varies significantly by developmental stage, legal frameworks, and clinical context. Understanding the distinctions between **capacity and competency**, **informed consent and assent**, and the unique ethical challenges at both ends of the age spectrum is essential for ethical clinical practice.

## Foundational Ethical Principles

**Autonomy**: Respect for an individual's right to self-determination; developmentally contingent in pediatrics. **Beneficence**: Acting in the patient's best interest; the primary standard for pediatric decision-making. **Non-maleficence**: "First, do no harm"; guides risk-benefit analysis for interventions. **Justice**: Fair distribution of resources and equitable access to care across populations. These principles may conflict, requiring structured ethical reasoning and, at times, ethics consultation.

## Capacity and Competency

### Definitions

**Competency** is a **legal determination** made by a court; a patient is deemed competent or incompetent. **Capacity** is a **clinical determination** made by physicians at the bedside; it is decision-specific and may fluctuate. A patient may have capacity for one decision (e.g., choosing a meal) but not another (e.g., refusing life-saving surgery)

### Assessing Decision-Making Capacity in Adults

| Component | Assessment Question | Example of Impairment |
|-----------|-------------------|----------------------|
| Communicate | Can the patient express a consistent choice? | Patient gives contradictory answers minutes apart |
| Understand | Does the patient comprehend the relevant information? | Cannot paraphrase diagnosis or treatment options |
| Appreciate | Does the patient apply the information to their situation? | Denies having the illness despite evidence |
| Reason | Can the patient weigh risks and benefits? | Cannot explain why one option is preferred over another |

Four components (Aid4 framework): **Communicate** a choice consistently. **Understand** relevant information about the condition and proposed treatment. **Appreciate** how the information applies to their situation. **Reason** about treatment options by weighing risks and benefits. Capacity assessment should be documented clearly in the medical record. Common conditions affecting capacity: delirium, dementia, intoxication, psychosis, severe depression. **Fluctuating capacity**: Reassess when clinical status changes; time decisions for periods of maximal lucidity.

### Surrogate Decision-Making

When an adult lacks capacity, a **surrogate decision-maker** is identified following a hierarchy: healthcare proxy > spouse > adult child > parent > sibling (varies by state) Surrogates should use **substituted judgment** (what the patient would have wanted) when patient preferences are known. When preferences are unknown, the **best interest standard** applies. **Advance directives**: Living wills and durable powers of attorney for healthcare document patient preferences.

![Decision-making capacity assessment framework](illustration-capacity-assessment-framework.jpg)

## Informed Consent

### Elements of Informed Consent

**Disclosure**: Nature of the condition, proposed intervention, risks, benefits, alternatives, and consequences of refusal. **Understanding**: Patient comprehends the information provided. **Voluntariness**: Decision is free from coercion or undue influence. **Capacity**: Patient has decision-making capacity (see above) **Authorization**: Patient agrees to the proposed plan.

### Consent in Pediatric Practice

**Parents/legal guardians** provide informed **permission** for medical treatment of minors. Parental authority is grounded in the presumption that parents act in their child's best interest. **Exceptions to parental consent**: **Emergency doctrine**: Life-threatening situations when parents are unavailable. **Mature minor doctrine**: Recognized in some jurisdictions for adolescents demonstrating mature judgment. **Emancipated minors**: Legally independent through marriage, military service, court order, or self-support. **Specific conditions**: Many states allow minors to consent independently for STI treatment, contraception, substance abuse treatment, and mental health care.

## Assent in Pediatric Practice

**Assent** is the child's agreement to participate in care decisions, appropriate to their developmental level. AAP recommends seeking assent from children aged **7 years and older**. Components of assent: Help the child understand their condition in age-appropriate terms. Explain what to expect from tests and treatments. Assess the child's understanding and willingness. Solicit the child's expression of willingness. **Dissent** (a child's refusal) should be respected when the intervention is not essential; it carries less weight in life-threatening situations.

## Ethical Challenges Across the Age Spectrum

### Neonatal Ethics

**Periviable births** (22-25 weeks): Shared decision-making about resuscitation; outcomes data inform but do not dictate decisions. **Medical futility**: Defining when continued treatment offers no benefit; distinguish from prognostic uncertainty. **Best interest vs. parental autonomy**: Parents may request interventions that the medical team considers harmful.

### Adolescent Ethics

**Confidentiality**: Adolescents have a right to privacy regarding sensitive health topics; clinicians must understand state-specific minor consent laws. **Refusal of treatment**: A 16-year-old with cancer refusing chemotherapy presents a challenging intersection of developing autonomy and parental authority. **Reproductive health**: Access to contraception and pregnancy-related services without parental involvement varies by jurisdiction.

### Adult and Geriatric Ethics

**Do-Not-Resuscitate (DNR) orders**: Should reflect informed patient preferences, not physician assumptions about quality of life. **Involuntary hospitalization**: For patients who are a danger to self or others due to mental illness; balances autonomy against safety. **Elder abuse**: Physicians are mandatory reporters; screen for financial, physical, and emotional abuse. **Rational suicide and medical aid in dying (MAID)**: Legal in select jurisdictions; requires careful assessment of capacity and coercion.

![Consent and assent across the developmental spectrum](illustration-consent-assent-spectrum.jpg)

## Ethics Consultation and Resources

Hospital ethics committees provide guidance on complex cases through formal **ethics consultations**. Ethics consultation does not override clinical judgment but provides structured analysis and mediation. **Institutional ethics committees** also address policy development and education. Familiarity with institutional and state-level resources is essential for navigating disputes.

![Hospital ethics consultation process flowchart](illustration-ethics-consultation-process.jpg)

## Clinical Pearls

Capacity is a clinical assessment that is decision-specific and may fluctuate; competency is a legal determination by a court. Children aged 7 and older should be engaged in age-appropriate assent, even though parents provide legal consent. The mature minor doctrine and emancipated minor status are jurisdiction-specific; know your state laws. In conflicts between parents and the medical team, ethics consultation and, if necessary, legal involvement may be required. Surrogate decision-makers should use substituted judgment when possible and the best interest standard when patient preferences are unknown.

## References

1. Appelbaum PS. Assessment of patients' competence to consent to treatment. *N Engl J Med*. 2007;357(18):1834-1840.
2. American Academy of Pediatrics Committee on Bioethics. Informed consent, parental permission, and assent in pediatric practice. *Pediatrics*. 2016;138(2):e20161484.
3. Beauchamp TL, Childress JF. *Principles of Biomedical Ethics*. 8th ed. Oxford University Press; 2019.
4. Larcher V, Craig F, Bhogal K, et al. Making decisions to limit treatment in life-limiting and life-threatening conditions in children: A framework for practice. *Arch Dis Child*. 2015;100(Suppl 2):s1-s23.