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Difficulty: MediumAdvance Directives and Surrogate Decision Making

A 71-year-old man with a history of congestive heart failure is admitted to the intensive care unit with urosepsis. He is profoundly delirious, unable to demonstrate understanding of his medical situation, and lacks clinical decision-making capacity. His respiratory status rapidly deteriorates due to acute respiratory distress syndrome, and the attending physician determines that endotracheal intubation is required for stabilization.

The patient's son and daughter are both present at the bedside. The son presents a valid Durable Power of Attorney for Finances and states, "Dad has a living will that says 'no breathing machines.' I handle all of his legal and financial affairs, and I am instructing you to just keep him comfortable." The daughter presents a valid Medical Power of Attorney (Healthcare Proxy) designating her as the patient's healthcare agent. She states, "We discussed this extensively. He only meant he didn't want machines if he had an irreversible, terminal condition. He would definitely want temporary help to survive a treatable infection. Please intubate him."

Which of the following is the most appropriate next step in management?

  1. Intubate the patient in accordance with the daughter's directive.Answer
  2. B
    Provide comfort care only in accordance with the son's directive.
  3. C
    Provide comfort care only based on the explicit instructions in the living will.
  4. D
    Postpone the intubation until an ethics committee can convene to mediate the family dispute.
  5. E
    Obtain a psychiatric consultation to formally assess the patient's legal competence to make his own decision.

Answer

Proceed with intubating the patient as directed by the designated healthcare proxy (the daughter).
The correct action is to follow the directive of the daughter, who is the patient's legally designated healthcare proxy. When a patient lacks clinical decision-making capacity, medical decisions fall to the surrogate. The daughter holds a Medical Power of Attorney, granting her explicit legal authority to make healthcare decisions on the patient's behalf. Furthermore, her decision uses the principle of substituted judgment—she is interpreting his living will in the context of his values, reasoning that he would accept a temporary intervention for a reversible illness (urosepsis). The son's Durable Power of Attorney for Finances gives him control over the patient's assets and legal affairs, but zero authority over medical decisions.

Step-by-Step Solution

1
Assess the patient's clinical decision-making capacity.
The patient is delirious and unable to understand his medical situation, confirming he lacks capacity to consent to or refuse intubation.
Establishing lack of capacity is the legal prerequisite for turning to a surrogate decision-maker.
2
Identify the legally authorized surrogate decision-maker.
The daughter holds a valid Medical Power of Attorney, making her the authorized healthcare proxy. The son's Financial Power of Attorney grants no medical authority.
A legally designated healthcare proxy supersedes other family members and financial agents in the surrogate hierarchy.
3
Evaluate the surrogate's decision against the patient's previously expressed wishes (Substituted Judgment).
The daughter is interpreting the living will contextually, determining that the patient would accept temporary intervention for a reversible condition (urosepsis) despite his general aversion to "breathing machines" for terminal states.
The primary role of a healthcare proxy is to provide substituted judgment, applying the patient's values to specific, unforeseen clinical scenarios that a static living will cannot fully capture.

Key Concept

In incapacitated patients, a designated Medical Power of Attorney (Healthcare Proxy) has sole authority to make medical decisions and interpret advance directives, superseding family members holding only a Financial Power of Attorney.
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Topics

Advance Directives and Surrogate Decision Making

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