When documenting patient consent, which component is essential for legal validity?

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The essential element for legally valid patient consent is that the agreement is voluntary and informed. Informed means the patient understands what will be done, the risks and benefits, the alternatives (including doing nothing), and the consequences of not proceeding, with questions answered. Voluntary means the patient is deciding free of coercion or pressure and has the capacity to choose. Documentation should reflect that this understanding and voluntariness occurred; the method of recording—written or verbal—serves as evidence, but a form alone isn’t enough if the patient wasn’t adequately informed or wasn’t free to decide. Express consent is a clear declaration of agreement, and implied consent is inferred from actions in certain situations, but the legal standard remains that consent be voluntary and informed.