Ana Margarida Ferreira

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—Access control models describe frameworks that dictate how subjects (e.g. users) access resources. In the Role-Based Access Control (RBAC) model access to resources is based on the role the user holds within the organization. RBAC is a rigid model where access control decisions have only two output options: Grant or Deny. Break The Glass (BTG) policies on(More)
Data retrieval and its integration is one of the major problems that face large and complex health organizations. This is especially relevant when patient information is produced in heterogeneous environments. Implementing a Virtual Electronic Patient Record (VEPR) system may provide an adequate and cost-effective solution for most clinical information(More)
The Electronic Medical Record (EMR) integrates heterogeneous information within a Healthcare Institution stressing the need for security and access control. The Biostatistics and Medical Informatics Department from Porto Faculty of Medicine has recently implemented a Virtual EMR (VEMR) in order to integrate patient information and clinical reports within a(More)
BACKGROUND The integration of Information Systems (IS) is essential to support shared care and to provide consistent care to individuals--patient-centred care. This paper identifies, appraises and summarises studies examining different approaches to integrate patient data from heterogeneous IS. METHODS The literature was systematically reviewed between(More)
The Electronic Medical Record (EMR) is a very important support tool for patients and healthcare professionals but it has some barriers that prevent its successful integration within the healthcare practice. These barriers comprise not only security concerns but also costs, in terms of time and effort, as well as relational and educational issues that can(More)
PURPOSE The objective of this paper is to show that grounded theory (GT), together with mixed methods, can be used to involve healthcare professionals in the design and enhancement of access control policies to Electronic Medical Record (EMR) systems. METHODS The mixed methods applied for this research included, in this sequence, focus groups (main(More)