Ukraine's Experience with Management of Combat Casualties Using NATO's Four‐Tier “Changing as Needed” Healthcare System

INTRODUCTION: The full-scale war with Russia on the territory of Ukraine has revealed several problems related to care of the wounded. In this article, we summarize the mechanisms of injury and injuries sustained for the period February to April 2022, focusing on extremity injuries. MATERIALS AND METHODS: We compared these to a period of lower-intensity warfare in 2014-2021. In both cases, we report patients treated by the National Military Medical Clinical Center (NMMCC) in Kyiv. We also sought to evaluate the care of the wounded from an organizational viewpoint, taking into account the four-level system of care also used by the North Atlantic Treaty Organization (NATO). Third, we sought to understand lessons learned that could improve the care of the wounded. CONCLUSION: During the 2022 conflict, the percentage of patients with extremity wounds who had long bone fractures increased and the percentage of people with long bone fractures who had bone defects increased, compared with 2014-2021. This may be due to the higher blast energy from the weapons used in the current conflict. Second, we adapted the four-level NATO system of care. Level 2 (first level hospital) care was provided by civilian hospitals close to the fighting, rather than mobile military hospitals. Level 3 (specialized) and 4 (highly specialized) care were combined into one hospital (NMMCC). This is the first description of flexible use of NATO's four levels. Finally, a major lesson learned was the need to improve use of damage control surgery.