[Adverse events and adverse event reporting systems].

Knowledge about the incidence of errors in anaesthesia and intensive care is only rudimentary but it appears justified to assume that errors occur much more often than we all expect. One reason is most likely the complexity of our work. Errors may alter our patients' health and healing process, imply financial and legal personal and institutional threats and may reduce health workers' performances. The article summarizes several methods to identify errors within a health care system and strengthens the importance of error analysis to reduce its incidence. Results of an analysis should be published if they are of general interest.