Conclusion:
Aortic Cannula size should be selected in conjunction with the
perfusionist team to utilize the appropriate cannula for adequate flow
during CPB. It is imperative to finally decide the aortic cannula size
after observing the ascending aorta size after opening the chest. Use of
an inappropriately large aortic cannula particularly in neonates and
children can obstruct the aortic blood flow before and after CPB and
patient may develop refractory LV distension and cardiac arrest.