Altug Kasali

Evidence-Based Design of Healthcare Facilities: Opportunities for Research and Practice in Infection Prevention

Affiliations: 1. SimTigrate Design Lab, School of Architecture, Georgia Institute of Technology, Atlanta, Georgia; 2. Division of Infectious Diseases, Department of Medicine, Emory University School of Medicine, Atlanta, Georgia; 3. Health Systems Institute, Georgia Institute of Technology, Atlanta, Georgia; 4. School of Industrial Design, Georgia Institute of Technology, Atlanta, Georgia; 5. Agency for Healthcare Research and Quality, Rockville, Maryland; 6. RTI International, Washington, DC. Received October 2, 2012; accepted November 21, 2012; electronically published April 9, 2013. 2013 by The Society for Healthcare Epidemiology of America. All rights reserved. 0899-823X/2013/3405-0011

The Role of Facility Design in Preventing the Transmission of Healthcare-Associated Infections: Background and Conceptual Framework

15.00. DOI: 10.1086/670220 Evidence-based design (EBD) of healthcare facilities is an emerging field that has the potential to significantly reduce the burden of healthcare-associated infections (HAIs). There is a growing body of evidence demonstrating that the built environment of healthcare settings—their layout, materials, equipment, and furnishings—plays a key role in facilitating or preventing transmission of pathogens. The infection prevention community can be an important partner in further developing this evidence base by advocating for and including healthcare facility design in its research agenda. At the same time, the EBD of the built environment has the promise of providing an additional set of tools for infection prevention. A relatively new discipline, EBD has deep roots in environmental psychology, architecture, medicine, and other sciences. It postulates that the design of the built environment fundamentally impacts patient, provider, and organizational outcomes (ie, decreased infection rates, length of stay, falls, use of analgesics, and operating costs) while improving patient and caregiver experience and satisfaction. Similar to evidence-based medicine, EBD uses the best available evidence to inform decision making and includes measurement of outcomes. EBD of healthcare facilities gained prominence in the early 2000s with the publication of the Institute of Medicine’s report Crossing the Quality Chasm, a growing research evidence base, and the initiation of the largest hospital construction program in US history. After a decade of closing hospitals, the US began spending more than

The Role of the Hospital Environment in Preventing Healthcare-Associated Infections Caused by Pathogens Transmitted through the Air

40 billion annually on new healthcare facilities to accommodate shifting demographics, advancing technologies, and competitive pressures. EBD is a multistep process that includes (1) framing of goals and models, (2) incorporation of healthcare facility guidelines, (3) planning and design, and (4) operations (Figure 1). These are in turn affected by the economic and professional culture in which decisions are made: the evidence base, the greater visibility and pay for performance that comes from the “quality revolution,” best practices or examples, and shrinking reimbursement margins in a competitive environment. Infection prevention plays a key role at each step, as follows. Framing. Specific decisions about guidelines, planning and design, and operations are framed by stakeholders’ understanding of the goals of healthcare design and the models that drive it. Owners, clinicians, patients, regulators, and designers develop a view of “good” healthcare settings: what they should achieve and how to do so. Early models included envisioning hospitals as churches or, more recently, as pristine, white, modern laboratories. In the 2000s, a series of literature reviews highlighted that design and the built environment could improve patient safety, decrease pain, and increase satisfaction. These reviews and the growing focus on patientand family-centered care helped create demand for larger, light-filled, quieter healthcare facilities that provided comfort and positive distractions for patients and families, such as designated family areas in patient rooms, gardens, and water features. Families were provided increased access to patient rooms, including within intensive care units, where there had previously been strict visiting hours. Healthcare workers were provided spaces that better suited their tasks and afforded respite when on break. Several prominent articles emerged suggesting that the return on investment for these design features was achieved in as little as 1–3 years, based on designs that increased market share and decreased length of stay, due in part to decreased infections, reduced falls, and reduced analgesic use. Guidelines. Evidence and expectations are translated to design in part through the process of writing guidelines and standards. These guidelines, such as those promulgated by the Facilities Guidelines Institute (FGI), are often written by volunteer committees of professionals and offer guidance or are adopted as codes in the majority of the states. The Hospital Infection Control Practices Advisory Committee’s

The Role of Water in the Transmission of Healthcare-Associated Infections: Opportunities for Intervention through the Environment

OBJECTIVE: To describe the conceptual framework and methodology used to conduct a comprehensive literature review of current evidence evaluating the role of the built environment in the transmission of healthcare-associated infections. BACKGROUND: A multidisciplinary approach to evaluating a vast and diverse dataset requires a conceptual framework to create a common understanding for interpretation. This common understanding is accomplished through the application of a “chain of transmission” model depicting temporal and physical paths of pathogens that cause healthcare-associated infections. The chain of transmission interventions model argues that infection can potentially be reduced by interrupting any of several links in the chain. TOPICAL HEADINGS: The key pathogens impacted by the built environment are identified. The chain of transmission and the conceptual framework are described. Opportunities for intervention through the built environment are presented, which in turn guide the subsequent methodology used to conduct the systematic literature review. CONCLUSIONS: The chain of transmission interventions model is a multidisciplinary conceptualization of the interaction between pathogens and the built environment, and this model facilitated a systematic literature review of a very large amount of data.

The Role of Facility Design in Preventing Healthcare-Associated Infection: Interventions, Conclusions, and Research Needs

OBJECTIVE: To assess and synthesize available evidence in the infection control and healthcare design literature on strategies using the built environment to reduce the transmission of pathogens in the air that cause healthcare-associated infections (HAIs). BACKGROUND: Air can serve as a route for transmission of important HAI pathogens, including Mycobacterium tuberculosis and influenza, and may play a role for others typically transmitted by contact, including Staphylococcus aureus and Clostridium difficile. TOPICAL HEADINGS: Four primary interventions can be used interrupt the transmission of pathogens in air: ventilation, filtration, decontamination, and isolation. Many studies demonstrate that unidirectional airflows, when combined with very clean air and frequent air changes, reduce bacterial counts in the air, though mostly focused on the operating room. A high-efficiency particulate air filter removes almost all particles from the air and is used in protective environments such as the operating room, but little evidence supports its broader application. Ultraviolet germicidal radiation can augment the performance of heating, ventilation, and air conditioning systems. Isolation with negative pressure ventilation prevents spread of airborne pathogens such as tuberculosis. CONCLUSIONS: Current evidence is limited by the complexity of the interactions between pathogens and potential hosts, and in the methods used to assess impact of these strategies. Because the factors that affect transmission of the pathogens are complex and transcend disciplines, a collaborative approach among the key stakeholders in healthcare facility design should be actively pursued from planning to completion of construction and in rigorous research to best determine how design can reduce HAIs.

The Role of the Hospital Environment in the Prevention of Healthcare-Associated Infections by Contact Transmission

OBJECTIVE: To assess and synthesize available evidence in the infection control and healthcare design literature on strategies using the built environment to reduce the transmission of pathogens in water that cause healthcare-associated infections (HAIs). BACKGROUND: Water can serve as a reservoir or source for pathogens, which can lead to the transmission of healthcare-associated infections (HAIs). Water systems harboring pathogens, such as Legionella and Pseudomonas spp., can also foster the growth of persistent biofilms, presenting a great health risk. TOPICAL HEADINGS: Strategies for interrupting the chain of transmission through the built environment can be proactive or reactive, and include three primary approaches: safe plumbing practices (maintaining optimal water temperature and pressure; eliminating dead ends), decontamination of water sources (inactivating or killing pathogens to prevent contamination), and selecting appropriate design elements (fixtures and materials that minimize the potential for contamination). CONCLUSIONS: Current evidence clearly identifying the environments role in the chain of infection is limited by the variance in surveillance strategies and in the methods used to assess impact of these strategies. In order to optimize the built environment to serve as a tool for mitigating infection risk from waterborne pathogens—from selecting appropriate water features to maintaining the water system—multidisciplinary collaboration and planning is essential.

Grounding Evidence in Design: Framing Next Practices

OBJECTIVE: To summarize the findings and provide recommendations based on the multidisciplinary literature review and industry scan, focusing on the links between the built environment and healthcare-associated infections. To propose a research agenda in order to increase informed design decisions and advance the evidence base. BACKGROUND: The HAI-Design project explores the research linking a range of design interventions to healthcare-associated infection. The multidisciplinary team evaluated over 3,800 articles and conducted interviews with a range of stakeholders including CEOs, architects, designers, physicians and other healthcare experts, the results of which are featured in this special Supplement as topical papers. TOPICAL HEADINGS: The four topical papers describing the role of the built environment in the acquisition of healthcare-associated infections are summarized. The evidence evaluating the strategies for intervention through the built environment is analyzed, and a research agenda is proposed. CONCLUSIONS: While the evidence base supporting the efficacy of strategies and technologies continues to grow, there are currently few data that demonstrate a reduction in infection rates. The need for multidisciplinary collaboration and increased efforts to standardize the evaluation of environmental studies are essential to overcome the many challenges and improve the reliability of data

El diseño basado en la evidencia : un análisis temático

OBJECTIVE: This article describes the role of the hospital environment in the spread of pathogens by direct and indirect contact. In addition, the prevention of transmission through interventions involving the built environment is discussed. BACKGROUND: The hospital environment can become contaminated with pathogenic microorganisms, some of which can persist for long periods of time. Although contamination is common, the contribution of the hospital environment to the development of healthcare-associated infections remains unclear. In part spurred by the development of newer technologies to enhance environmental cleaning or to prevent contamination, research into the role of the environment in causing healthcare-associated infections has accelerated. TOPICAL HEADINGS: A review of the recent literature finds an increasing body of evidence implicating contaminated surfaces in patient care areas in the transmission of pathogens and the development of infections. Single-patient rooms and optimally placed alcohol hand rub dispensers and other design features can mitigate infection risk. Enhanced environmental cleaning including touchless technologies and self-cleaning surfaces can reduce environmental contamination and may prevent infections. CONCLUSIONS: The hospital environment contributes to transmission of pathogens in hospitals and to the development of healthcare-associated infections. Newer technologies to prevent environmental contamination or to enhance cleaning are promising although additional studies with the endpoints of reduction of infections are needed before the role of these technologies is known.

Fifth-, sixth-, and seventh- grade students’ use of non-classroom spaces during recess: The case of three private schools in Izmir, Turkey

Abstract By focusing on episodes from a case study of healthcare design practice investigated in situ, the aim of this paper is to provide a better understanding of the nature and use of evidence in design. Our account portrays a practice where sources other than scientific research findings were also considered. Based on observations and interviews from the field, the paper first provides a brief account of sources and representations of evidence. The varieties of evidence within the observed practice fall into four major groups: precedents, scientific research, embodied knowledge, and anecdotes. We observed how the participants in the design process used each of these forms of evidence to formulate and explain their design ideas in terms of mechanistic models to form causal links. These mechanistic arguments, which follow a model of scientific thinking, were repositories of trans-disciplinary knowledge involving design and other disciplines.

Architects in interdisciplinary contexts: Representational practices in healthcare design

This paper presents an observational study of the activities of an interdisciplinary design team tasked with designing a healthcare facility in a developing country. The intent of the team was to implement «evidence-based design». Tracking the disciplinary interactions of the participants, we investigate emerging issues concerning integration of evidence coming from different sources into the architectural design delivered. The study adopts a data-driven thematic approach in the analysis of the qualitative data datacollected. We discuss three themes –textures of evidence, operationalizing evidence and tools of integration– that emerge out of our qualitative analysis of evidence-based design practice.