Non-invasive cerebral oximetry monitoring during cardiopulmonary bypass in congenital cardiac surgery: a starting point

Abstract

We demonstrated that cerebral oximetry decreases with the loss of pulsatile flow regardless of the mean arterial pressure and, furthermore, is not directly related to the haematocrit value in patients with reduced pulmonary blood flow.

Effect of the adjunct of carbon dioxide during cardiopulmonary bypass on cerebral oxygenation

“…However, our group reported a significant relationship between the INVOS value and the pulsatile flow (differential pressure) and not with the mean arterial pressure. 8 Similarly, in the same frame, the haematocrit level and oxygen saturation were shown to be stable. Thus, the INVOS value might reflect the change in PaCO 2 and cerebral vascular resistances as expected with the cerebrovascular CO 2 reactivity.…”