The device consists of a silicone cannula, which is placed in a central venous location (usually via the right internal jugular vein ... patient at the time of insertion once the tip is located ...

Optimal placement of the catheter by the neurosurgeon is generally 25-35 mm into the brain (Littlejohns, Bader, and March, 2003). The oxygen-sensing area should be in the white matter of the brain ...