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Difficulty: HardDecision-Making Capacity

A consultation-liaison psychiatry service is evaluating four different patients on the medical-surgical wards to determine their capacity to refuse recommended interventions. Match each patient's clinical presentation with the specific core element of decision-making capacity (Appelbaum criteria) that is fundamentally impaired.

  • A patient with severe anorexia nervosa refuses enteral feeding, stating, 'I acknowledge my BMI of 11 is critically low and causes cardiac arrhythmias, but I am still grossly overweight and my heart is completely immune to any damage.'Impaired appreciation of the significance of the illness and its consequences
  • A patient with no prior psychiatric history refuses a life-saving appendectomy, stating, 'I understand I will likely die without surgery, but my astrological chart strictly prohibits any cutting procedures on Tuesdays.'Impaired reasoning and rational manipulation of information
  • A patient with early neurocognitive disorder repeatedly refuses a pacemaker, but when asked to explain what the device does or the consequences of refusing it, is completely unable to recall or explain the details.Impaired understanding of factual medical information
  • A patient with acute ICU delirium secondary to sepsis who alternates between calmly consenting to central line placement and aggressively shouting 'No needles!' within a 30-minute window.Impaired ability to express a clear and consistent choice

Answer

The anorexia patient has impaired appreciation, the astrology patient has impaired reasoning, the dementia patient has impaired understanding, and the delirious patient has impaired ability to express a consistent choice.
Clinical decision-making capacity requires four sequential elements. The delirious patient fails the most basic level: expressing a stable choice. The dementia patient can express a choice ('no') but fails the next level: understanding the facts. The anorexia patient understands the facts but fails to appreciate their personal relevance. The patient relying on astrology understands and appreciates the risk of death, but fails to rationally manipulate the information (reasoning) to arrive at a logical choice.

Step-by-Step Solution

1
Identify the four core pillars of decision-making capacity.
The pillars are: expressing a choice, understanding, appreciation, and reasoning.
These established legal and ethical criteria (Appelbaum criteria) must be systematically assessed to determine capacity.
2
Analyze each patient's clinical scenario to identify the primary deficit.
The anorexia patient fails to apply facts to herself; the astrology patient cannot logically process facts; the dementia patient cannot retain facts; the delirious patient cannot maintain a stable decision.
Accurately mapping clinical symptoms to legal definitions ensures ethical treatment.
3
Match the specific deficit to the correct capacity pillar.
Anorexia -> Appreciation; Astrology -> Reasoning; Dementia -> Understanding; Delirium -> Expressing a choice.
This completes the correct pairing for the matching question.

Key Concept

The Four Core Elements of Decision-Making Capacity
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Topics

Decision-Making Capacity

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