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R Obregon

Publications and source records attributed to R Obregon.

5 recordsLinked to original sources

A critical assessment of theories/models used in health communication for HIV/AIDS.

Most theories and models used to develop human immunodeficiency virus (HIV)/acquired immune deficiency syndrome (AIDS) communication are based on social psychology that emphasizes individualism. Researchers including communication and health scholars are now questioning the presumed global relevance of these models and thus the need to develop innovative theories and models that take into account regional contexts. In this paper, we discuss the commonly used theories and models in HIV/AIDS communication. Furthermore, we argue that the flaws in the application of the commonly used "classical" models in health communication are because of contextual differences in locations where these models are applied. That is to say that these theories and models are being applied in contexts for which they were not designed. For example, the differences in health behaviors are often the function of culture. Therefore, culture should be viewed for its strength and not always as a barrier. The metaphorical coupling of "culture" and "barrier" needs to be exposed, deconstructed, and reconstructed so that new, positive, cultural linkages can be forged. The HIV/AIDS pandemic has served as a flashpoint to either highlight the importance or deny the relevance of theories and models while at the same time addressing the importance of culture in the development and implementation of communication programs.

Attitude to Health↗

Toward a new communications framework for HIV/AIDS.

In response to the overwhelming burden of new cases of human immunodeficiency virus (HIV) in Africa, Asia, Latin America, and the Caribbean, the Joint United Nations Programme on HIV/AIDS (UNAIDS), in 1997, initiated a project to examine the application of existing communication theories/models to HIV/acquired immune deficiency virus (AIDS) prevention and care in these regions. In the past 2 years, 103 leading researchers and practitioners from different parts of the world were invited by the UNAIDS to participate in one of five consultative workshops designed to review these theories/models and rethink their adequacy for Africa, Asia, Latin America, and the Caribbean. A new communications framework for HIV/AIDS was developed to move from a focus on the individual to a focus on five domains of "contexts" that influence behaviors: government policy, socioeconomic status (SES), culture, gender relations, and spirituality.

Attitude to Health↗

Epicardial and endocardial localized 31P magnetic resonance spectroscopy: evidence for metabolic heterogeneity during regional ischemia.

Previous studies have noted that myocardial blood flow and high energy phosphates are heterogeneous across the myocardial wall during ischemia. In order to determine whether differences in metabolites between the subendocardium and subepicardium could be detected using 31P magnetic resonance spectroscopy, the Fourier series window (FSW) experiment was implemented on a porcine model of graded regional ischemia. FSW experiments using a planar phantom showed a 46% improvement in localization to the subendocardium compared to a one-pulse experiment. Animal studies of graded ischemia demonstrated a gradient in the phosphocreatine to inorganic phosphate ratio in the myocardium that paralleled the gradient in blood flow. These studies demonstrate the ability of spatially localized 31P magnetic resonance spectroscopy to detect regional changes in myocardial high energy phosphates localized to the subepicardium and subendocardium.

Animals↗