When Capacity Returns

Part of Consent and Vulnerable Populations: Consent by a Legal Representative.

About 5 minutes. Free, in your language, no account needed.

Why this matters

A person enrolled by a representative during a period of incapacity may recover the ability to decide. When they do, the representative's authority ends, and the participant's own consent must be sought.

This is stated in the frameworks, it is widely understood in principle, and it fails routinely in practice, because the representative-consent process is built as a way in with no defined way onward.

Why it fails

Nothing prompts it. A trial's visit schedule contains assessments, procedures and reviews. It contains no event called "check whether this participant can now decide for themselves."

The consent is already in the file. From a documentation standpoint the participant is consented. Nothing looks incomplete, no query fires, no monitoring finding arises.

Capacity returns gradually. There is rarely a moment. A participant emerging from critical illness improves over days, and no single day announces itself.

Everyone is relieved. A participant recovering is good news, and the administrative consequence is the last thing on anyone's mind.

It creates work and risk. Seeking consent introduces the possibility of refusal and the loss of a participant. Nobody decides not to ask for that reason, and the incentive quietly favors not remembering.

What must happen

A scheduled capacity review for every participant enrolled by a representative, at a defined interval, with a named owner and a record of each review including the negative ones.

A defined threshold for when to attempt consent, which should be permissive. Attempting and finding the person not yet able is a good outcome, and nothing is lost.

A full consent conversation, not a signature. The participant is being asked for the first time about something already being done to them, which is a harder conversation than an ordinary consent, not an easier one. They need to know what has happened so far, what was done, what remains, and that they may stop.

Acceptance of refusal without pressure. A participant who declines to continue withdraws. They are not obliged to consent to what has already happened, and the data collected up to that point is handled according to what was agreed and what they now say.

Documentation of the transition, showing when capacity returned, when consent was sought, and what was decided.

The conversation itself

It is unusual and it deserves preparation.

The participant may have no memory of the period. They may not know they are in a trial. They may learn for the first time that they received an experimental intervention while unconscious, which is a substantial thing to be told.

What helps: telling them plainly and early in the conversation, explaining who consented and why that was lawful, being clear that the decision from here is entirely theirs, and giving them time rather than seeking a signature in the same conversation where they learned of it.

What does not help: framing it as a formality, which is how it is often introduced in order to make it easier, and which sets up a participant to agree without registering what they are agreeing to.

In practice

A critical care trial enrolls sedated, ventilated participants through representatives.

The coordinator maintains a register: every participant enrolled by a representative, the enrollment date, and a weekly capacity review with the outcome recorded.

Over four months, 14 participants are enrolled this way and 9 regain capacity. All 9 are approached.

Two decline to continue. Seven consent, and three of those ask questions nobody had anticipated, including one who wants to know whether the intervention he received was the active one and what it did.

The two who declined are the point. Both had been receiving a trial intervention they had not agreed to, lawfully, and both decided differently when they could decide. The register is the only reason either was asked.

What this looks like when it goes wrong

A participant is enrolled in an emergency trial while unconscious, on a representative's consent. The trial involves twelve months of follow-up visits.

He recovers fully within two weeks and attends every follow-up visit for a year.

Nobody seeks his consent. At each visit he is treated as an enrolled participant, and he cooperates because he is attending a hospital appointment that he understands to be part of his care.

At the twelve month visit a new coordinator reviews the file and finds that the only consent is the representative's, dated the day of admission.

The participant has attended twelve visits and undergone twelve months of assessments on the authority of a representative whose authority ended in week two, and he was never told there was a decision for him to make.

Nobody did anything deliberately. The process had no step at which anyone was supposed to ask.

Key takeaways