USMLE Step 3: Ethics, Legal, Advance Directives, Living Will vs. Healthcare Proxy, DNR Orders, POLST

Advance Directives: Living Will vs Healthcare Proxy, DNR Orders, POLST

What This Is and Why It Matters for USMLE

Advance directives are high-yield for Step 1 and Step 2 CK, appearing in ethics and management contexts. They are less common in Step 3, but essential for clinical practice.

High-Yield Facts (What You Must Memorize)

• Living Will: A written document outlining a patient's wishes for end-of-life care, including life-sustaining treatments.
• Healthcare Proxy: A person designated to make medical decisions on behalf of the patient if they are unable to do so.
• DNR Orders: Do Not Resuscitate orders, which instruct healthcare providers not to perform CPR in the event of cardiac arrest.
• POLST: Physician Orders for Life-Sustaining Treatment, a document that outlines a patient's wishes for end-of-life care, including life-sustaining treatments.

Clinical Pearls & Buzzwords

• Advance directive: A written document outlining a patient's wishes for end-of-life care.
• Healthcare proxy: A person designated to make medical decisions on behalf of the patient.
• DNR order: A medical order instructing healthcare providers not to perform CPR in the event of cardiac arrest.
• POLST: A document that outlines a patient's wishes for end-of-life care, including life-sustaining treatments.

Step-by-Step Clinical Reasoning

1. Identify the patient's wishes: Review the patient's advance directive, if available.
2. Determine the patient's capacity: Assess the patient's ability to make medical decisions.
3. Consult with the healthcare proxy: If the patient is unable to make decisions, consult with the designated healthcare proxy.
4. Order DNR or POLST: If the patient has a DNR order or POLST, order accordingly.
5. Document the patient's wishes: Document the patient's wishes in the medical record.

Common Mistakes & Exam Traps

• Mistake: Failing to review the patient's advance directive.
  • Why it happens: Rushing or overlooking the patient's advance directive.
  • How to avoid it: Review the patient's advance directive thoroughly.
• Mistake: Failing to consult with the healthcare proxy.
  • Why it happens: Misunderstanding the patient's capacity or failing to recognize the need for a healthcare proxy.
  • How to avoid it: Assess the patient's capacity carefully and recognize the need for a healthcare proxy.
• Mistake: Failing to order DNR or POLST.
  • Why it happens: Misunderstanding the patient's wishes or failing to recognize the need for DNR or POLST.
  • How to avoid it: Review the patient's advance directive carefully and recognize the need for DNR or POLST.

How It’s Tested on USMLE

• Step 1: Basic science vignette, such as a patient's advance directive or a discussion of end-of-life care.
• Step 2 CK: Clinical vignette, such as a patient's presentation with a DNR order or POLST.
• Step 3: Similar to Step 2 CK, with an emphasis on risk assessment, prognosis, and CCS ordering.

CCS (Step 3) Relevance (If Applicable)

• Initial orders: Order DNR or POLST, if applicable.
• Monitoring and follow-up: Monitor the patient's condition and follow-up with the healthcare proxy, if necessary.
• Common mistakes: Failing to order DNR or POLST, or failing to consult with the healthcare proxy.

Practice Questions (3-5 single-best-answer)

Question 1

A 75-year-old patient is admitted to the hospital with a diagnosis of end-stage cancer. The patient's advance directive indicates a desire for comfort care only. The patient's family requests that the patient be resuscitated if they experience cardiac arrest. What should the healthcare provider do?

A) Resuscitate the patient B) Follow the patient's advance directive C) Consult with the healthcare proxy D) Order DNR

Answer: B) Follow the patient's advance directive

Explanation

The healthcare provider should follow the patient's advance directive, which indicates a desire for comfort care only.

Question 2

A 45-year-old patient is admitted to the hospital with a diagnosis of acute myocardial infarction. The patient has a DNR order. What should the healthcare provider do?

A) Perform CPR B) Follow the DNR order C) Consult with the healthcare proxy D) Order a stress test

Answer: B) Follow the DNR order

Explanation

The healthcare provider should follow the patient's DNR order, which instructs healthcare providers not to perform CPR in the event of cardiac arrest.

Question 3

A 60-year-old patient is admitted to the hospital with a diagnosis of dementia. The patient's family requests that the patient be resuscitated if they experience cardiac arrest. What should the healthcare provider do?

A) Resuscitate the patient B) Follow the patient's advance directive C) Consult with the healthcare proxy D) Order DNR

Answer: B) Follow the patient's advance directive

Explanation

The healthcare provider should follow the patient's advance directive, which indicates the patient's wishes for end-of-life care.

Question 4

A 30-year-old patient is admitted to the hospital with a diagnosis of traumatic brain injury. The patient has a POLST indicating a desire for life-sustaining treatments. What should the healthcare provider do?

A) Follow the POLST B) Consult with the healthcare proxy C) Order DNR D) Resuscitate the patient

Answer: A) Follow the POLST

Explanation

The healthcare provider should follow the patient's POLST, which indicates a desire for life-sustaining treatments.

Question 5

A 70-year-old patient is admitted to the hospital with a diagnosis of end-stage cancer. The patient's family requests that the patient be resuscitated if they experience cardiac arrest. What should the healthcare provider do?

A) Resuscitate the patient B) Follow the patient's advance directive C) Consult with the healthcare proxy D) Order DNR

Answer: B) Follow the patient's advance directive

Explanation

The healthcare provider should follow the patient's advance directive, which indicates a desire for comfort care only.

Quick Reference Card (60-Second Summary)

• Advance directive: A written document outlining a patient's wishes for end-of-life care.
• Healthcare proxy: A person designated to make medical decisions on behalf of the patient.
• DNR order: A medical order instructing healthcare providers not to perform CPR in the event of cardiac arrest.
• POLST: A document that outlines a patient's wishes for end-of-life care, including life-sustaining treatments.

If You Get Stuck on Test Day

• Eliminate obviously wrong answers: Look for answers that are clearly incorrect or not supported by the patient's presentation.
• Use the "next best step" hierarchy: Consider the least invasive and most specific next step in management.
• For Step 3 CCS: Order basic labs, vitals, and IV access when unsure.

Related USMLE Topics

• End-of-life care: Connects to advance directives, DNR orders, and POLST.
• Medical decision-making: Connects to advance directives, healthcare proxies, and DNR orders.
• Ethics: Connects to advance directives, healthcare proxies, and DNR orders.