Sophysa Polaris SPV programmable VP shunt
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According to the 2010 AJNR article by Lollis et al, the shunt is in keeping with a Sophysa Polaris SPV shunt with the valve set to position 3 which corresponds to an opening pressure of 110 mm H20.
This is an example of a Sophysa Polaris SPV programmable VP shunt valve.