Advance directives: what they cover and what they do not

An advance directive is a way of recording what medical treatment you would or would not want, in case you later cannot say so yourself.

The terminology and legal status vary enormously between countries. This article describes the general categories; what exists and what binds where you live requires local information.

The two broad types

An instructional directive — commonly called a living will, an advance decision, or an advance directive depending on where you are — records specific wishes about treatment.

A proxy appointment — a healthcare power of attorney, healthcare proxy, health and welfare attorney, or similar — appoints a person to make decisions on your behalf.

Most planners recommend having both, because instructions cannot anticipate every situation and a person can respond to circumstances the document did not foresee.

The refusal versus request distinction

This is the most important thing to understand and the most commonly misunderstood.

In most legal systems, a competent adult has a strong right to refuse medical treatment, and an advance refusal made while competent is generally respected and may be legally binding.

There is no equivalent right to demand a specific treatment. A directive requesting particular interventions is generally treated as an expression of preference to be taken into account, not as an obligation on clinicians to provide treatment they consider inappropriate.

The practical implication: the parts of your directive that refuse things are stronger than the parts that ask for things.

What tends to be covered

Cardiopulmonary resuscitation. Mechanical ventilation. Artificial nutrition and hydration. Antibiotics in certain circumstances. Dialysis. Hospital admission versus care at home. Blood transfusion, which is relevant to certain religious commitments.

Also, and less often included, statements about what matters to you — what quality of life would be acceptable, what you fear, what you value. These are not legally operative in the same way and they are frequently the most useful part for the people who have to decide.

Where directives fail in practice

I spent years in hospice work and the failures were consistent.

Nobody could find it. A directive in a drawer at home is a directive that does not exist at three in the morning in an emergency department.

Give copies to your proxy, your doctor, and anyone likely to be present. Ask whether your health system has a registry. Carry a card noting that one exists and who holds it.

It was too specific or too vague. Documents listing precise interventions frequently do not match the actual clinical situation. Documents saying only "no heroic measures" leave everyone guessing what that means.

The most useful directives combine some specific refusals with a clear statement of values and goals.

The proxy did not know. Appointing someone without having the conversation puts them in an impossible position. They know they have authority and not what you would want.

The conversation matters more than the document. Have it.

It was out of date. Views change with circumstances. What seems unacceptable when healthy may look different after living with a condition for years. Review it periodically.

Family overrode it. Legally, in many systems, a valid directive should prevail. In practice, clinicians face distressed relatives at the bedside, and a document that contradicts what the family is demanding creates conflict.

The protection against this is having told your family in advance, so nobody is surprised.

Resuscitation orders specifically

Separate from an advance directive, and worth understanding.

A do-not-resuscitate or do-not-attempt-CPR order is a clinical instruction, generally recorded in medical records and made in discussion with the patient or their representative.

It applies specifically to cardiopulmonary resuscitation and to nothing else. A resuscitation order does not mean withholding other treatment, and this is misunderstood constantly, sometimes by staff.

Some systems use broader forms that record wishes about a range of treatments in a portable format, designed to travel with the patient between settings.

Capacity

A directive only takes effect when you lack capacity to decide for yourself. While you have capacity, your current expressed wishes prevail over anything written earlier.

Capacity is decision-specific and can fluctuate. Someone may lack capacity for a complex decision and retain it for a simple one, and may have capacity on one day and not another.

Directives should be made while capacity is clear, and it is worth documenting that it was.

The practical steps

Find out what documents exist where you live and what legal weight each carries. Health systems, hospices and national bodies frequently publish free forms and guidance.

Appoint a proxy, and choose someone who can hold a position under pressure rather than the person you are closest to, if those differ.

Have the conversation with them, and with your family, and with your doctor.

Distribute copies and record where they are.

Review after any significant change in health.

This is general information, not legal or medical advice. The documents available and their legal effect differ by country and, in some countries, by state. Discuss with your doctor and, where appropriate, a qualified legal adviser.