To which body region are whole body blast injuries coded in the ISS?

Whole body blast injuries are coded in the Injury Severity Score (ISS) under the external body region. This is because such injuries typically affect the skin and soft tissues over a large area of the body, rather than being confined to specific internal organs or bodily systems like the head, thorax, or abdomen. The external body region category in ISS is used for injuries that do not fall neatly into the classifications of specific organ injuries, allowing for comprehensive tracking of injuries sustained in explosive events. This categorization helps in assessing the overall severity of injuries a patient may have sustained from a blast, emphasizing the impact on the external surface of the body.