[Operative risk. Patient evaluation, informed consent].

It is mandatory, the Authors say, to obtain a previous and definite consent before the patient undergoes the operation. Moreover the patient shall be well acquainted about the risk connected to the operation before he gives his consent. On the contrary, as already confirmed by the Italian Supreme Court of Justice, the consent shall not be valid and the Doctors could be found guilty of "psychic violence". Finally the Authors, to evaluate the probable risks liked to the operation, use scales as ASA and prognostic indexes as SAPS to avoid appraisage too subjective.