Emergency department overcrowding - implications for paediatric emergency medicine.

Emergency department (ED) overcrowding has been an international phenomenon for more than 10 years. It is important to understand that ED overcrowding is a measure of health system efficiency and is not strictly related to ED volumes or capacity. ED overcrowding is defined as a situation in which the demand for emergency services exceeds the ability of physicians and nurses to provide quality care within a reasonable time. The major factor resulting in ED overcrowding is the presence of admitted patients in the ED for prolonged periods of time, not a high volume of low-acuity patients. While limited data are available for paediatric EDs, winter respiratory illnesses set the stage for ED overcrowding, which are epidemic in adult or general EDs. Prehospital-, ED- and hospital-related factors are described in the present article, and these may help prevent or manage this important patient safety problem.