Kidney Injury Scale | Medicalalgorithms.com

Traumatic injury to the kidney can be graded using an organ injury scale.

Type	Subtype	Description of Injury	Grade
contusion		microscopic or gross hematuria, urologic studies normal	I
hematoma	subcapsular	nonexpanding without parenchymal laceration	I
	perirenal	nonexpanding hematoma confined to renal retroperitoneium	II
laceration	parenchymal	< 1.0 cm depth of renal cortex without urinary extravasation	II
	parenchymal	>= 1.0 cm depth of renal cortex without collecting duct rupture or urinary extravasation	III
	parenchymal	extending through the renal cortex, medulla and collecting system	IV
	parenchymal	completely shattered kidney	V
vascular		main renal artery or vein injury with contained hemorrhage	IV
		avulsion of renal hilum which devascularizes kidney	V

If both kidneys are injured, then increase grade by 1 up to Grade III.

where:

• I am assuming that a Grade II lesion can be upgraded to Grade III, but not Grade III to Grade IV (see Testis Injury Scale).

• I wonder if the increase in grade might also apply if the person only has 1 kidney.

To read more or access our algorithms and calculators, please log in or register.