Withdrawing Noninvasive Ventilation Over a Proxy's Objection
Mr. K is a 64-year-old former school principal with bulbar-onset ALS, 16 hours of noninvasive ventilation daily, and a forced vital capacity of 28%. His advance directive, signed 18 months ago when he had capacity, declines intubation and tracheostomy but accepts noninvasive ventilation for comfort. Over two weeks the ventilator no longer relieves his breathlessness, and he now says, 'I'm done. Take the mask off and just keep me comfortable.' His daughter, who is his health care proxy, says he is depressed and 'not himself,' demands a psychiatric hold, and threatens to sue if the mask is removed. He is alert, oriented, and scores 29/30 on the Mini-Mental State Examination.
1. How would you assess his decision-making capacity, and how does possible depression affect the analysis?
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Assess the four functional abilities explicitly and document them:
- Understanding of his diagnosis, prognosis, and the alternatives (continue noninvasive ventilation, withdraw it, or trial it only at night).
- Appreciation that the information applies to him - not merely reciting facts.
- Reasoning - can he compare burdens and benefits and give a rationale consistent with his values?
- Expression of a stable choice.
His MMSE of 29 and his coherent explanation of 'I don't want to live strapped to a mask' support capacity. Depression can coexist with capacity; treat it (screen with PHQ-9, ask about hopelessness, consider an SSRI and psychiatry) but do not use it to override a capacitous refusal. Reassess after treatment if there is genuine doubt, and involve psychiatry to document, not to legitimize a predetermined outcome. Capacity is decision-specific: he may lack capacity for complex financial decisions yet retain it for this one.
2. What is the legal and ethical basis for honoring his request, and how do you manage his daughter's opposition?
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A capacitous adult has a near-absolute right to refuse any medical treatment, including life-sustaining treatment. Withdrawing noninvasive ventilation is legally and ethically distinct from euthanasia or assisted dying: the intent is to remove a treatment that no longer provides the benefit he sought, not to cause death, and the cause of death is ALS. His written directive corroborates his current wish.
With the daughter: acknowledge her fear and grief, avoid arguing, and separate emotion from facts. Say: 'You are not being asked to agree that he should die. You are being asked to support what he has said he wants.' Offer a family meeting with palliative care, social work, and, if needed, the ethics committee. Explain that a proxy interprets prior wishes; a proxy cannot substitute her own. Do not require family consensus to honor a capacitous refusal. If she threatens litigation, notify risk management and legal counsel, but do not delay comfort-focused care while awaiting resolution. Document capacity, the directive, and every conversation.
3. Outline the symptom plan for the first 24 hours after the mask is removed.
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Anticipate dyspnea, anxiety, secretions, and air hunger, and premedicate rather than wait for crisis.
- Before removal: morphine 2–4 mg subcutaneously and midazolam 0.5–1 mg subcutaneously 15–30 minutes beforehand (opioid-naive doses).
- After removal: morphine 2–4 mg subcutaneously every 1 hour as needed, with a low continuous infusion if requirements are frequent; midazolam 0.5–1 mg every 1 hour as needed for anxiety or air hunger.
- Secretions: glycopyrrolate 0.2 mg subcutaneously every 6 hours as needed; reposition and use suction only if it relieves rather than distresses him.
- Nonpharmacologic: fan to the face, open window, upright positioning, cool cloth, presence, and quiet.
Do not use neuromuscular blockers. Death typically occurs within hours to a few days; sedation should be titrated to comfort, not to unconsciousness as a goal. Stop pulse oximetry and blood draws, permit family presence, and provide bereavement support. Document the premedication rationale, because observers may later ask whether medication hastened death.