What change was made to the ACC Act in 2005 regarding treatment injury?

The amendment made to the ACC Act in 2005 that is most relevant is the replacement of the term 'medical mishap' with 'treatment injury.' This change was significant because it aimed to broaden the categorization of injuries that were compensable under the Accident Compensation Corporation (ACC) system. By adopting the term 'treatment injury,' the legislation recognized a wider array of injuries resulting from medical treatment, which enhanced the protection and rights of patients who may experience adverse effects from medical interventions.

This amendment aligned with a progressive approach to patient safety and accountability in healthcare, emphasizing the importance of addressing treatment-related injuries rather than only those resulting from negligent acts. It reflects a shift towards ensuring that people who suffer injuries as a result of treatments have access to support and compensation, thus reinforcing the principle of no-fault care within New Zealand's healthcare system.

The other options do not accurately represent the changes made or the impacts of the 2005 amendment within the ACC framework.