Organ Injury Scales
Standardized grading systems for organ injuries based on the American Association for the Surgery of Trauma (AAST) guidelines.
The Organ Injury Scales (OIS) presented here are based on the standards developed by the American Association for the Surgery of Trauma (AAST). Used with acknowledgment and for educational purposes only. For the most current and official versions, please refer to: https://www.aast.org
AAST Liver Injury Scale
Free preview — the complete scale
| Grade | Description |
|---|---|
| I | Subcapsular hematoma <10% surface area; capsular tear <1cm deep |
| II | Subcapsular hematoma 10-50% surface area; laceration 1-3cm deep |
| III | Subcapsular hematoma >50% surface area; laceration >3cm deep |
| IV | Parenchymal disruption 25-75% of hepatic lobe |
| V | Parenchymal disruption >75% of hepatic lobe; juxtahepatic venous injury |
Higher grade liver injuries typically require more aggressive management and have increased morbidity and mortality rates.
All injury scales
- Spleen Injury Scale
- Kidney Injury Scale
- Pancreas Injury Scale
- Duodenum Injury Scale
- Stomach Injury Scale
- Chest Wall Injury Scale
- Lung Injury Scale
- Bladder Injury Scale
- Urethra Injury Scale
- Colon Injury Scale
- Heart Injury Scale
- Thoracic Vascular Injury Scale
- Diaphragm Injury Scale
- Esophagus Injury Scale
- Small Bowel Injury Scale
- Rectum Injury Scale
- Abdominal Vascular Injury Scale
- Adrenal Injury Scale
- Ureter Injury Scale
- Vagina Injury Scale
- Vulva Injury Scale
- Testis Injury Scale
- Scrotum Injury Scale
- Penis Injury Scale
- Peripheral Vascular Injury Scale
- Mangled Extremity Injury Scale
- Glasgow Coma Score
- PAWSS Score
- BCVI
- RIG Score
- Gustilo-Anderson
- CIWA-Ar
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