FIGURE LEGENDS
Fig 1. NIRS registration of brain saturation during the operation. Noticed that after the venting started to aspirate (first arrow on the left) the flow to the brain suddenly reduced to levels below 40% and when stopped return to its baseline of 70-80%. After stopping the vent and try again later on when the vent has been restarted, the same effect happened again (see the second arrow on the right).