The population access to the secondary health care services is being pointed, by managers and researchers, as one of the challenges to the implementation of integrality in the Brazilian National Health System (SUS). This paper aims to evaluate the mechanisms used by SUS manager's, in the city of São Paulo, to guarantee medical assistance, from 2005 to 2008. The strategy of case study was chosen, using as data sources such as managers interviews, focus groups with SUS users, and participative observation. Thematic analysis was performed on health services organization, with theoretical references of the integrality concept. We tried to describe the path covered by the users to have access to the services, based on the view of users and managers. Secondary health care services were identified by managers as the "neck of a bottle" and one of the main obstacle to the SUS integrality. To overcome this situation, the municipal manager invested in the computerization of services, as an isolated step, and still, without considering user´s needs. However, this technological incorporation had low impact on the improvement of the population access to the secondary health care services, which was confirmed by user's source. It is argued that to face such complex problem it will be necessary to articulate actions, not only in health politics but also in health services organization and also in the (re)organization of the working process in any other level of the health system.
secondary health services; integrality; health management; Single Health System; health policy