泌尿 肾脏外伤分级

Grade 1
Hematuria with normal imaging studies
Contusions
Nonexpanding subcapsular hematomas
Grade 2
Nonexpanding perinephric hematomas confined to the retroperitoneum
Superficial cortical lacerations less than 1 cm in depth without collecting system injury
Grade 3
Renal lacerations greater than 1 cm in depth that do not involve the collecting system
Grade 4
Renal lacerations extending through the kidney into the collecting system
Injuries involving the main renal artery or vein with contained hemorrhage
Segmental infarctions without associated lacerations
Expanding subcapsular hematomas compressing the kidney
Grade 5
Shattered or devascularized kidney
Ureteropelvic avulsions
Complete renal laceration or thrombus of the main renal artery or vein

http://radiographics.rsnajnls.org/cgi/content/full/21/3/557

Renal injuries can be classified into fourlarge categories based on imaging findings.
Category I renal injuriesinclude minor cortical contusion, subcapsular hematoma, minor lac-eration with limited perinephric hematoma, and small cortical infarct.
Category II lesions include major renal lacerations extending to themedulla with or without involvement of the collecting system and seg-mental renal infarct.
Category III lesions are catastrophic renal injuriesand include multiple renal lacerations and vascular injury involving therenal pedicle.
Category IV injuries are ureteropelvic junction injuries.