In Portuguese, the expression "informed consent form" is "termo de consentimento informado".
a person's agreement to allow something to happen, made with the full knowledge of and having understood the risks involved
Young people and vulnerable adults may not always be in a position to give informed consent.
an agreement by a patient to undergo an operation or medical treatment or take part in a clinical trial, made with the full knowledge of and having understood the risks involved
Doctors should not operate unless given informed consent.