Accuracy of visual estimation of ejection fraction in patients with heart failure using augmented reality glasses.

OBJECTIVE: Left ventricular ejection fraction (LVEF) is measured to assess haemodynamic status and cardiac function. It may be difficult to accurately measure in patients with heart failure (HF) as they are often poorly echogenic. The augmented reality (AR) technology is expected to provide real-time guidance that will enable more accurate measurements. METHODS: A prospective, randomised, case-crossover simulation study was conducted to confirm the effect of AR glasses on echocardiographic interpretation in patients with HF. 22 emergency physicians participated. The participants were randomly assigned to two groups. Group A estimated the visual ejection fraction of echocardiographic video clips without the AR glasses, while group B estimated them with glasses. After a washout period, the two groups crossed over. The estimates were then compared with the ejection fraction measurements obtained by echocardiologists; intraclass correlation coefficient (ICC) was calculated. RESULTS: The ICC with glasses (0.969, 95% CI 0.966 to 0.971) was higher than without glasses (0.705, 95% CI 0.681 to 0.727) among all participants. In the subgroup analysis, the first-year and second-year residents showed the most significant difference, with an ICC of 0.568 (95% CI 0.508 to 0.621) without glasses compared with 0.963 (95% CI 0.958 to 0.968) with glasses. For the third-year and fourth-year residents group, the ICC was 0.754 (95% CI 0.720 to 0.784) without glasses and 0.972 (95% CI 0.958 to 0.968) with glasses. Among the group of attending physicians, the ICC was 0.807 (95% CI 0.775 to 0.834) without glasses and 0.973 (95% CI 0.969 to 0.977) with glasses. CONCLUSIONS: AR glasses could be helpful in measuring LVEF and could be more helpful to those with little visual estimation experience.

Roles of a hospital for community safety promotion.

It is not easy for any health professional to be aware of injury problems and safety issues within their own communities if their main responsibility is not in this field. Health professionals, however, can play an important role in all aspects of injury prevention and safety promotion. This includes not only medical or surgical treatment for the injured patients but also risk assessment, health education, community action, organisational development and advocacy for policy to promote safety at a multi-level in the society. This can be accomplished most efficiently through collaboration with diverse sectors within a community, including hospitals, public health professionals, policy makers, school boards, police departments, fire departments, citizens' coalitions and others. Since 2002, Ajou University School of Medicine and Public Health in Suwon, Korea, has introduced a Safe Community model to many countries in Asia, including Korea, Japan, China, Vietnam, Thailand, among others, which is led by The World Health Organization Collaborating Centre on Community Safety Promotion at Karolinska Institutet, Stockholm, Sweden.