Twenty years with the public health intervention wheel: Evidence for practice.

The Public Health Intervention Wheel (PHI Wheel) is a population-based practice model for public health nursing practice that encompasses three levels of practice (community, systems, individual/family) and 17 public health interventions. This article shares the story of how the PHI Wheel was created, disseminated, implemented by public health nurses (PHNs) and educators across the globe, and updated with new evidence published in the second edition of Public Health Interventions: Applications for Public Health Nursing in 2019. Evidence on the relevance of PHI Wheel interventions for public health practice in cultural and international settings supports the model's value in explaining PHN practice. This article highlights the experiences of various countries with the PHI Wheel including Canada, Ireland, New Zealand, Norway, Sweden, the United Kingdom, and the United States. The evidence update confirms the relevance of the model to PHN education and practice and reinforces the conviction that development of new evidence is essential for promoting population health.

Cornerstones of public health nursing.

The "Cornerstones of Public Health Nursing" describe the values and beliefs that underlie the practice of Public Health Nursing, which is a synthesis of public health and nursing. The impetus for the development of the Cornerstone framework originated from the need to advocate for public health nursing programs, positions, and funding. Grounded in practice, their development engaged stakeholders from the public health nursing community at every phase. The Cornerstone framework has been used over the past decade by educators to teach public health nursing and by administrators in state and local health departments for orientation and continuing education. The Cornerstones have been nationally and internationally disseminated. This paper describes the development and dissemination of the Cornerstones framework by public health nurses in Minnesota and features exemplars from practice.

Impact of aquaporin-4 channels on K+ buffering and gap junction coupling in the hippocampus.

Aquaporin-4 (AQP4) is the main water channel in the brain and primarily localized to astrocytes where the channels are thought to contribute to water and K(+) homeostasis. The close apposition of AQP4 and inward rectifier K(+) channels (Kir4.1) led to the hypothesis of direct functional interactions between both channels. We investigated the impact of AQP4 on stimulus-induced alterations of the extracellular K(+) concentration ([K(+)](o)) in murine hippocampal slices. Recordings with K(+)-selective microelectrodes combined with field potential analyses were compared in wild type (wt) and AQP4 knockout (AQP4(-/-)) mice. Astrocyte gap junction coupling was assessed with tracer filling during patch clamp recording. Antidromic fiber stimulation in the alveus evoked smaller increases and slower recovery of [K(+)](o) in the stratum pyramidale of AQP4(-/-) mice indicating reduced glial swelling and a larger extracellular space when compared with control tissue. Moreover, the data hint at an impairment of the glial Na(+)/K(+) ATPase in AQP4-deficient astrocytes. In a next step, we investigated the laminar profile of [K(+)](o) by moving the recording electrode from the stratum pyramidale toward the hippocampal fissure. At distances beyond 300 µm from the pyramidal layer, the stimulation-induced, normalized increases of [K(+)](o) in AQP4(-/-) mice exceeded the corresponding values of wt mice, indicating facilitated spatial buffering. Astrocytes in AQP4(-/-) mice also displayed enhanced tracer coupling, which might underlie the improved spatial re- distribution of [K(+)](o) in the hippocampus. These findings highlight the role of AQP4 channels in the regulation of K(+) homeostasis.

Population-based public health interventions: practice-based and evidence-supported. Part I.

The Intervention Wheel is a population-based practice model that encompasses three levels of practice (community, systems, and individual/family) and 17 public health interventions. Each intervention and practice level contributes to improving population health. The Intervention Wheel, previously known as the Public Health Intervention Model, was originally introduced in 1998 by the Minnesota Department of Health, Section of Public Health Nursing. The model has been widely disseminated and used throughout the United States since that time. The evidence supporting the Intervention Wheel was recently subjected to a rigorous critique by regional and national experts. This critical process, which involved hundreds of public health nurses, resulted in a more robust Intervention Wheel and established the validity of the model. The critique also produced basic steps and best practices for each of the 17 interventions. Part I describes the Intervention Wheel, defines population-based practice, and details the recommended modifications and validation process. Part II provides examples of the innovative ways that the Intervention Wheel is being used in public health/public health nursing practice, education, and administration. The two articles provide a foundation and vision for population-based public health nursing practice and direction for improving population health.

Population-based public health interventions: innovations in practice, teaching, and management. Part II.

The Intervention Wheel is a population-based practice model that encompasses three levels of practice (community, systems, and individual/family) and 17 public health interventions. Each intervention and practice level contributes to improving population health. The Intervention Wheel, previously known as the Public Health Intervention Model, was originally introduced in 1998 by the Minnesota Department of Health, Section of Public Health Nursing (PHN). The model has been widely disseminated and used throughout the United States since that time. The evidence supporting the Intervention Wheel was recently subjected to a rigorous critique by regional and national experts. This critical process, which involved hundreds of public health nurses, resulted in a more robust Intervention Wheel and established the validity of the model. The critique also produced basic steps and best practices for each of the 17 interventions. Part I describes the Intervention Wheel, defines population-based practice, and details the recommended modifications and validation process. Part II provides examples of the innovative ways that the Intervention Wheel is being used in public health/PHN practice, education, and administration. The two articles provide a foundation and vision for population-based PHN practice and direction for improving population health.

Assessment, program planning, and evaluation in population-based public health practice.

Public health practitioners in Minnesota developed and implemented a population-based public health practice model for community assessment, program planning, and evaluation. The ultimate goal of this process is improvement in population health. Major challenges to the implementation of a population-based model are addressed through the use of a theory of action; interventions at community, systems, and individual levels; and intermediate evaluation indicators. Examples of resulting changes in public health practice are described.