 Tunneling was performed between the two incisions and a ProGAV valve set to an opening pressure of 10 with a 1-5 shunt assist was brought through the subgaleal tissue, connected to the distal catheter and a flushing reservoir was interposed between the burr hole site ventricular catheter and the ProGAV valve. 
Tunneling was performed between the two incisions and a ProGAV valve set to an opening pressure of 10 with a 1 - 5 shunt assist was brought through the subgaleal tissue , connected to the distal catheter and a flushing reservoir was interposed between the burr hole site ventricular catheter and the ProGAV valve .