Table 2.

Classification of complications

Classification of Complication	Action/Effect
SIR complication classification (13)
Minor complication	No therapy, no consequence
	Nominal therapy, no consequence; includes overnight admission for observation only
Major Complications	Require therapy, minor hospitalization (<48 h)
	Require major therapy, unplanned increase in level of care, prolonged hospitalization (<48 h)
	Permanent adverse sequelae
	Death
Classification of venous rupture (14)
Grade 1 rupture	Does not interfere with flowa, size variable, requires no therapy, stablea
	Minor complication (SIR)
Grade 2 rupture	Slows or stops flowa, size variable, therapy required, stablea
	Major complication (SIR)
Grade 3 rupture	Large extravasation, size variable, unstable, continues to expanda, pulsatile
	Major complication (SIR)

SIR, Society of Interventional Radiology.

^aDenotes defining features.