Table 1 Orthopaedic surgical adverse events severity [OrthoSAVES] system

I

Adverse event does not require treatment and has no adverse effect

II

Adverse event requires simple or minor invasive treatment (e.g., antibiotics, Foley catheter, nasogastric [NG]) tube) and has no long-term effect on patient outcome

III

Adverse event requires invasive (e.g., surgery) or complex treatment (e.g., monitored bed) and is most likely to have a temporary (less than 6 months) adverse effect on outcome

IV

Adverse event requires invasive (e.g., surgery) or complex treatment (e.g., monitored bed) and is most likely to have a prolonged (more than 6 months) adverse effect on outcome¹

V

Sentinel or significant life or limb threatening event²

VI

Adverse event resulting in death