Table 1. Differences between cardiopulmonary bypass (CPB) and extracorporeal membrane oxygenator (ECMO).

Characteristics	CPB	ECMO
Priming volume	Large	Small
Type of oxygenator	Short term use	Short or Long-term use
Pump	Roller or centrifugal	Centrifugal
Reservoir	Present	No reservoir
Cooling possibility	Yes	Limited
Initial heparin bolus	300–400 U/kg	50–100 U/kg
Target ACT	>480	160–200