Advance directive — USMLE Step 2 CK MCQ
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Correct answer: B — Follow the valid advance directive
The vignette describes Advance directive, supported by incapacitated patient with written directive refusing intubation. Follow the valid advance directive is the single best answer because it matches the diagnostic or management priority in this clinical setting. The other choices are plausible alternatives in related presentations, but they do not best fit the timing, findings, and guideline-directed approach described here.
Reference: AMA Code of Medical Ethics