She was unable to give informed consent because of a mental condition.因为有精神疾病，她不能作出知情同意。Doctors must obtain the informed consent of all patients before giving any treatment.在进行任何治疗前，医生必须得到病人的知情同意。The patient's informed consent is required before certain treatments can be carried out.实施治疗前必须告知病人并征得其同意。