Spiegelberg, german company, developped a very nice and wide range of products for intracranial pressure including CSF drainage option.
They propose optional accesses to epidural, parenchymal or intraventricular pressure measurement including their Silverline catheter, made of unsoluble silver, that can be implantable with many shunts or external drainage systems.
The use of such a catheter is intended to reduce the risk of infection.