visitors or the medical personnel, or to prevent a real threat of inflicting physical harm. 5.4.15. The medical personnel shall undergo special training on the use of physical force in order to ensure that physical force is used proportionately and to minimize the risk of inflicting physical harm upon a patient. 5.5. Medical Personnel 5.5.1. 5.5.2. 5.5.3. 5.5.4. 5.5.5. The needs of psychiatric organizations shall undergo a comprehensive assessment, and the results shall help to define the optimal ratio of patients to medical or support personnel, and to clarify the scope of work of each one. The necessary professional staff position shall be designated for the psychiatric care of persons with mental health issues, as well as their rehabilitation treatment and preservation and reintegration of social ties. The vacant positions in psychiatric organizations shall be filled, and the necessary specialists and sufficient numbers of staff shall be engaged in their work. The designated staff shall be sufficient for individualized treatment of each person, especially if a ward has persons confined to bed or persons with mobility issues or persons in need of special care.  For example, one psychiatric organization was found to have one psychiatrist per night duty shift, while the number of beds was 350.  In some cases, a ward treating 60 persons with mental health issues was found to have only one nurse and two orderlies per shift. A mechanism for round-the-clock duty shifts of psychiatrists shall be designated in the regional psychiatric organizations. 61