Not less than once every six months the staff of the hospital shall give a complete psychiatric examination to every patient confined in the hospital. As used in this section and sections 17a-570 to 17a-573, inclusive, the word “patient” means any person confined for custody, care and treatment under section 17a-567. Such examination shall ascertain whether the patient has psychiatric disabilities and is in need of custody, care and treatment at the hospital and, in making such determination, the staff shall assemble such information and follow such procedures as are used in initial examinations by the diagnostic unit to indicate the need for custody, care and treatment. The record of the examination shall include the information required in subdivisions (1), (2) and (3) of subsection (d) of section 17a-566 and a recommendation for the future treatment of the patient examined. The record of the examination may include a recommendation for transfer of the patient or change in confinement status.