Simulation is a recognized technique to educate and plan to improve care processes and safety. This pair of special issues highlights the use of simulation in nursing and its value in work such as communication enhancement, minority population care, and patient deterioration.   

The neonatal intensive care unit (NICU) is a complex environment that serves a vulnerable population at increased risk for harm should errors occur. This special issue draws from a multidisciplinary set of authors to explore patient safety issues arising in the NICU. Included in the issue are articles examining topic such as video assessment, diagnostic error, and human factors engineering in the NICU.

Patient safety has been described as an unmet need in physician training. This special issue covers areas of focus for a patient safety curriculum drawn from experience in the German medical education system. Topics covered include human error, blame, and responsibility. Articles also review the epidemiology of common problems such as medication safety, organizational contributors to failure, and diagnostic error.

The Institute of Medicine report, To Err Is Human, marked the founding of the patient safety field. This special issue of Health Affairs, published 20 years after that report, highlights achievements and progress to date. One implementation study of evidence-based surgical safety checklists demonstrated that leadership involvement, intensive activities, and engagement of frontline staff are all critical to successful adoption of safety practices. Another study demonstrated that communication-and-resolution programs either decreased or did not affect malpractice costs, providing further support for implementing such programs. Experts describe the critical role of human factors engineering in patient safety and outline how to enhance the use of these methods. The concluding editorial by David Bates and Hardeep Singh points to progress in reducing hospital-acquired infections and improving medication safety in acute care settings and highlights remaining gaps in the areas of outpatient care, diagnostic errors, and electronic health record safety. In the related information, the Moore Foundation provides free access to five articles in this special issue.

Radiologists play a critical role in safe diagnostic imaging and communication of test results. Articles in this special issue explore clinical and system factors that can contribute to potential failure in radiology practice. Topics covered include the need for improvements in documentation and the radiologist's role in reducing delay, uncertainty, and miscommunication.

Articles in this special issue provide insights into how human error can affect the safety of oral and maxillofacial surgery, a primarily ambulatory environment. The authors cover topics such as simulation training, wrong-site surgery, and the safety of office-based anesthesia.

Articles in this special supplement explore research commissioned by National Institute for Health Research in the United Kingdom to address four patient safety research gaps: how organizational culture and context influence evaluations of interventions, organizational boundaries that affect handovers and other aspects of care, the role of the patient in safety improvement, and the economic costs and benefits of safety interventions.

This supplement consists of 12 articles drawn from a 2008 conference on diagnostic error, covering topics such as medical problem solving, clinical decision making, diagnostic decision support systems, and educational approaches to reducing diagnostic errors.