AAST Diaphragm Injury Scale
AAST diaphragm OIS (Moore 1994)Grades diaphragmatic injury from contusion through lacerations sized ≤2 cm, 2–10 cm, and >10 cm with limited tissue loss, up to large tissue loss >25 cm².
Also searched as: trauma · rupture · hernia
Information
Incomplete input
- Please provide: AAST diaphragm injury grade.
How this tool works
Diaphragmatic injuries follow blunt thoracoabdominal compression or penetrating thoracoabdominal wounds and are easily missed on initial CT. The AAST scale is size-based: contusion (I), laceration ≤2 cm (II), 2–10 cm (III), >10 cm with tissue loss ≤25 cm² (IV), and tissue loss >25 cm² (V). Left-sided injuries are recognized more often; right-sided defects may be buffered by the liver. Even small full-thickness tears warrant repair because of the risk of delayed visceral herniation. Laparoscopy or thoracoscopy can be both diagnostic and therapeutic in stable patients without other indications for open exploration.
References
Implemented from the cited published sources. Educational use only; confirm against current guidelines before clinical use.
Related calculators
Same subspecialty, overlapping subject matter.