The American Association for the Surgery on Trauma (AAST) reported a severity grading system for emergency general surgery. This can be applied to cholecystitis related emergency.
Patient selection: cholecystitis
Parameters:
(1) gallbladder and gallbladder wall
(2) adjacent sites
Gallbladder Wall
Adjacent Sites
Grade
intact with no acute inflammation
normal
0
acute inflammation
sterile
I
gangrenous, empyema, emphysematous
sterile
II
perforation
local contamination
III
perforation
pericholecystic abscess or GI fistula
IV
perforation
generalized peritonitis
V
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