Nurses conceived the expanded and coherent way of CHS with the official assumptions and current scientific literature. We highlighted the active monitoring, integrality, scheduled throughout the growth and development process, identifying problems presented by children or which they may be exposed to in the context where they live, through multidisciplinary and intersectoral actions, which are dependent on family participation. However, there was limited references to the concept of Epidemiological Surveillance, and the potential of health surveillance contributions was not made explicit to the reorganization of practices aimed at the child population. In the development of this model in practice, difficulties have been identified, highlighting the lack of active participation of users in the actions proposed by the FHU, the unavailability for further discussions on issues of CHS in the FHU and the disarticulation between levels and sectors involved with actions related to childhood in the city.