Advance Directive for Dementia Oregon: How to Plan Before Capacity Declines

An Oregon advance directive must be signed by someone with the legal capacity to make and communicate healthcare decisions. Once dementia progresses to the point where a person can no longer understand the document or express informed consent, they cannot execute a valid directive.

That window closes faster than most families expect. Here's how to use it while it's open.

Why Dementia Planning Is Urgent

Early-stage dementia is often manageable — the person recognizes family members, participates in conversations, and can articulate preferences about their care. But the legal standard for executing an advance directive requires the person to understand:

• What the document does
• What decisions it covers
• Who they're appointing to make decisions on their behalf
• The consequences of the choices they're making

By moderate-stage dementia, one or more of these capacities is typically compromised. A directive signed at that point can be challenged by family members, healthcare providers, or facility administrators.

The practical advice: complete the advance directive at the earliest signs of cognitive decline, while capacity is unambiguous. If there's any question, have the person's physician document in their medical chart that the patient has decision-making capacity at the time of signing.

What to Document in the Advance Directive

Oregon's Advance Directive (Form OHA 3905) has two sections that matter most for dementia planning:

Section 3 (Health Care Instructions) covers preferences for three clinical states. For someone with dementia, the most relevant is advanced progressive illness — a condition that is serious, incurable, and causing severe disability. This is where you indicate whether life-sustaining treatment should be provided, withheld, or left to the Health Care Representative's judgment.

Section 4 (Additional Instructions) is where dementia-specific planning happens. This free-form section lets the person write quality-of-life thresholds and specific scenarios. Examples:

• "If I can no longer recognize my spouse or children and cannot feed myself, I do not want life-prolonging treatment beyond comfort care"
• "Do not place me on a ventilator or feeding tube if I have been diagnosed with moderate-to-severe dementia"
• "I want pain management prioritized over alertness"
• "If I develop an infection or pneumonia while in advanced dementia, treat with oral antibiotics for comfort but do not hospitalize for IV treatment"

Vague instructions like "I want to die naturally" or "use your best judgment" leave your representative without guidance in the exact situations where specificity matters most.

Appointing a Health Care Representative for Dementia

The choice of Health Care Representative is especially consequential when dementia is the primary concern. Your HCR will likely need to make repeated, escalating decisions over months or years — not a single crisis moment.

Consider someone who:

• Lives nearby and can attend care meetings, facility reviews, and emergency consultations
• Understands the person's values around quality of life versus duration of life
• Can handle family disagreement (siblings often have very different ideas about "what Mom would want")
• Is emotionally capable of authorizing comfort-only care or declining aggressive treatment

Under Oregon law, an appointed HCR can authorize admission to a healthcare facility for up to 18 days for dementia-related behaviors, even if the patient objects. This authority is specifically designed for situations where someone with dementia needs care they may resist — but it puts significant responsibility on the representative.

What Happens Without an Advance Directive

If a person with dementia becomes incapacitated without a valid directive, Oregon's default surrogate hierarchy under ORS 127.635 kicks in: court-appointed guardian first, then spouse, then a designated adult, then a majority of adult children, and so on.

For dementia, the default hierarchy creates two specific problems:

1. Majority-vote requirements. When multiple adult children must agree, one sibling's refusal to authorize comfort-only care can stall decisions for weeks, during which the patient may receive aggressive treatment they would not have wanted.

2. Guardianship proceedings. If no surrogate is available or if surrogates disagree and can't resolve it, the matter goes to Oregon probate court. Guardianship proceedings take weeks to months, cost thousands in legal fees, and the court appoints someone who may have no personal knowledge of the patient's values.

An advance directive completed early in a dementia diagnosis avoids both scenarios entirely.

Coordinating with a POLST

Once dementia progresses to the point where the person's healthcare provider would not be surprised if they died within a year, it's time to discuss a POLST (Portable Orders for Life-Sustaining Treatment). The POLST converts advance directive preferences into active medical orders that EMTs and hospital staff follow immediately.

For someone in late-stage dementia, a POLST typically addresses:

• Whether to attempt CPR (most families and providers opt for DNR at this stage)
• Level of medical intervention — comfort measures only vs. selective treatment
• Whether to transfer to a hospital or manage symptoms in place

The advance directive guides the POLST conversation. Without documented preferences, the healthcare provider and surrogate decision-maker are making these choices without knowing what the patient wanted.

Start Planning Now

The Oregon Advance Directive & Living Will Kit includes section-by-section instructions for documenting dementia-specific preferences, a Health Care Representative briefing guide, and a POLST coordination reference — built around Oregon's specific statutory requirements.

See more Oregon guides →