Patient Safety and Quality Improvement

Patient safety is a fundamental component of quality healthcare. In New Zealand, the Health and Disability Commissioner (HDC) operates under the Health and Disability Commissioner Act 1994, upholding the Code of Health and Disability Services Consumers' Rights. The HDC investigates complaints from patients or their families and can make recommendations, issue opinions, and refer cases to the Director of Proceedings for potential disciplinary action.

Adverse event reporting in NZ occurs through two main mechanisms. The Critical Incident Reporting System (CIRS) operates within individual health organisations for internal learning. The New Zealand Patient Safety (NZPAS) reporting system allows voluntary national aggregation of adverse events. Serious adverse events (those causing significant harm or death) are subject to mandatory internal review under the Health Quality and Safety Commission NZ (HQSC) framework, with summary data published annually. Reporting culture is a key determinant of organisational safety — high-reliability organisations foster a non-punitive environment where near-misses and errors are reported without fear of blame.

Incident analysis tools help teams understand how adverse events occur. The fishbone (Ishikawa) diagram identifies contributing causes across categories such as people, processes, equipment, environment, and organisation. The Swiss cheese model (Reason, 1990) conceptualises defences as layers each with holes — an adverse event occurs when holes in multiple layers align. Human factors analysis examines the interaction between humans and systems, recognising that most errors are systems failures rather than individual failings. Root cause analysis (RCA) is a structured methodology for identifying the deepest contributing factors to an adverse event, with the goal of implementing systemic change rather than individual blame.

Quality improvement cycles use the PDSA (Plan-Do-Study-Act) framework. In the Plan phase, a change hypothesis is developed and a measurable aim stated. In the Do phase, the change is tested on a small scale. In the Study phase, data is analysed to determine whether the change produced the intended effect. In the Act phase, the change is either implemented more broadly, modified, or abandoned. Multiple rapid PDSA cycles are more effective than large-scale reform attempts. Clinical audit compares current practice against an agreed standard, identifies gaps, implements change, and re-audits (the audit cycle).

Medication safety is a high-priority patient safety domain. High-alert medications (e.g., anticoagulants, insulin, concentrated electrolytes, chemotherapy) carry a disproportionate risk of severe harm if errors occur. The five rights of medication administration — right patient, right drug, right dose, right route, right time — are foundational. Double-checks by two independent practitioners are required for high-alert medications in most NZ hospital policies.