Healthcare professionals, corrections officers, residential care workers, and administrators across Canada share a fundamental obligation to recognize, report, and respond to adverse events and near misses within their care environments. This obligation arises not from a single source but from an interconnected web of federal and provincial legislation, professional regulatory standards, organizational policies, and common law duties of care that together establish the framework governing patient and resident safety in controlled care settings. Understanding what constitutes an adverse event or a near miss, and appreciating why the distinction matters, forms the essential foundation for meeting reporting obligations and contributing to systemic improvements that protect both those in care and those providing it.
An adverse event in Canadian healthcare contexts refers to an unintended injury or complication that results from healthcare management rather than from the underlying disease or condition, and that leads to death, disability, prolonged hospitalization, or other harm to the patient or resident. This definition, which has been adopted with variations across Canadian jurisdictions and healthcare accreditation bodies, distinguishes between harm caused by the natural progression of illness and harm attributable to the actions, omissions, or systems failures of those delivering care. The Canadian Patient Safety Institute, now part of Healthcare Excellence Canada as of the date of authorship, has long emphasized that adverse events are not synonymous with negligence or error, though they may sometimes involve both. Rather, they represent outcomes that warrant investigation and disclosure because they indicate that something in the care process contributed to harm that might otherwise have been prevented.