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Walk the Even Hospital Database by book and chapter — the raw source passages that ground Ask, DDx, and the rest.
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©2013 UpToDate ® Print Email American Association for the Surgery of Trauma Organ Injury Severity Score (AAST-OIS) for the esophagus Grade* Injury description I Contusion; hematoma; partial thickness laceration II Laceration ≤50 percent of circumference III Laceration >50 percent of circumference IV Segmental loss or devascularization of ≤2 cm V Segmental loss or devascularization of >2 cm * Advance one grade for multiple lesions up to grade III. Reproduced with permission from: Moore EE, Jurkovich GJ, Knudson M, et al. Organ injury scaling VI: Extrahepatic biliary, esophagus, stomach, vulva, uterus (nonpregnant), uterus (pregnant), fallopian tube, and ovary. J Trauma 1995; 39:1069. Copyright © 1995 Lippincott Williams & Wilkins.