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).