Which ECMO systems are equipped with a hand crank?

The hand crank feature in ECMO systems plays a critical role in providing a backup method for pump operation in situations where power sources may be interrupted. The RotaFlow system is specifically designed with a hand crank that allows for manual operation of the pump, ensuring continuous blood flow and oxygenation even if electrical power fails. CardioHelp, on the other hand, is also equipped with a hand crank, which serves the same purpose, providing an essential backup in a clinical setting.

These features are indispensable for maintaining patient safety and hemodynamic stability during the unpredictable circumstances that can arise in critical care scenarios. The other systems listed do not have this feature, as their designs and functionalities focus on other means of operation and are not primarily equipped with a hand crank for manual use. Thus, the combination of RotaFlow and CardioHelp makes the correct answer, as both systems are known for incorporating this vital safety mechanism.