How are "incomplete transection" vessel injuries coded in AIS?

Incomplete transection vessel injuries in the Abbreviated Injury Scale (AIS) are specifically categorized under "incomplete circumferential involvement." This is because such injuries imply that although the vessel is damaged, there is still some intact wall remaining around the vessel, which distinguishes them from complete transection.

In AIS coding, recognizing the distinction between complete and incomplete injuries is critical for accurately reflecting the nature and severity of the injury. In the case of incomplete transection, it indicates a significant yet less severe condition than a complete transection where the vessel is entirely severed. Hence, the coding reflects the degree of damage and helps in understanding treatment implications and prognosis.

The focus on the term "incomplete circumferential involvement" highlights that only portions of the vessel circumference are affected, which is important for clinical assessments and decisions following such injuries.