Table 4.

Low clinical significance complications.

Low clinical significance = 15 complications/402 cannulations (3.7% complication rate per cannulation) 15 complications/194 cannulation episodes (7.7% complication rate per cannulation episode) These complications involved 14 cannulation episodes and 14 patients
Complication	Number of events	Type of ECMO	Additional details
>2 attempts at vascular access for successful cannulation without haemorrhage, vascular injury or sequalae (n = 13)	1	V-V
	1	V-A
	1	V-AV
	10	ECMO-CPR	8 cases required >2 attempts at 1 cannula, 1 case required >2 attempts for 2 cannulae
Technical difficulty with wire/dilation without sequalae or patient related complication (n = 2)	1	V–V	Access cannula kinked requiring exchange over wire
	1	V–V	Wire dislodgement during dilation, new vessel puncture required