Final answer:
The incorrect statement about informed consent is that signed forms may be filled after the procedure, as consent must always be obtained beforehand. Consent for minors must come from parents or legal guardians, and consent must be given before any sedation.
Step-by-step explanation:
The statement about informed consent that is not true is: 'signed forms may be filled in after the procedure is completed.' Informed consent must always be obtained prior to a medical procedure or participation in a study. Furthermore, in cases where research participants are minors, proper consent must be obtained from the parents or legal guardians before the child participates in the study. Additionally, patients must give their consent after receiving a full explanation of the procedure and before any sedation is administered to ensure they can make a clear and voluntary decision. It is crucial that all risks, benefits, and components of the procedure or study are fully outlined to the individual in advance.