Organ Injury Scaling - Liver

Grade	Injury Description		AIS-90
I	Haematoma	Subcapsular, <10% surface area	2
	Laceration	Capsular tear, <1cm parenchymal depth	2

II	Haematoma	Subcapsular, 10-50% surface area	2
		Intraparenchymal, <10cm diameter	2
	Laceration	1-3cm parenchymal depth, <10cm length	2

III	Haematoma	Subcapsular, >50% surface area or expanding. Ruptured subcapsular or parenchymal haematoma	3
		Intraparenchymal haematoma >10cm or expanding	3
	Laceration	>3cm parenchymal depth	3

IV	Laceration	Parenchymal disruption involving 25-75% of hepatic lobe or 1-3 Coinaud's segments in a single lobe	4

V	Laceration	Parenchymal disruption involving >75% of hepatic lobe or >3 Coinaud's segments within a single lobe	5
	Vascular	Juxtahepatic venous injuries ie. retrohepatic vena cava/central major hepatic veins	5

VI	Vascular	Hepatic Avulsion	6

Advance one grade for multiple injuries to same organ up to Grade III.

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