Table 1.

Ultrasonographic pancreatic assessment severity score (UPASS)

Component of the PASS	Assigned score
	0	1	2
Pancreatic size	Normal	Enlarged
Pancreatic echogenicity	Normal	Hyperechoic	Hypoechoic
Pancreatic echotexture	Homogenous	Heterogenous
Echogenicity of surrounding mesentery	Normal	Hypoechoic	Hyperechoic
Peripancreatic free fluid	No	Yes

Note: Table 1 denotes the components of the UPASS and their relative contributions to the UPASS. The UPASS ranges from 0 to 7, and the higher the UPASS the greater the ultrasonographic evidence of pancreatitis. Pancreatic enlargement was determined by comparison with the previously published reference intervals.25 Pancreatic echotexture was subjectively assessed, and pancreatic echogenicity was determined by comparison to internal markers such as the kidney, liver, and spleen,