What role does an ankle/brachial index (ABI) of less than 0.9 play in MSK trauma assessment?

An ankle/brachial index (ABI) of less than 0.9 indicates abnormal arterial flow, suggesting that there may be restricted blood flow to the lower extremities. This measurement is significant in the context of musculoskeletal trauma because it can help identify underlying vascular pathology that could complicate treatment or healing.

In cases of trauma, especially involving fractures or severe soft tissue injuries, it is critical to assess blood supply to the affected area. A low ABI can signal conditions such as peripheral artery disease or vascular compromise, which could hinder recovery and increase the risk of complications, such as necrosis of the tissue or delayed healing. Therefore, recognizing an ABI of less than 0.9 can be vital in the overall assessment and management of a patient with musculoskeletal injuries, as it necessitates further evaluation and possible intervention to ensure adequate blood flow is restored.