If you’re Intracranial Hypertension has no cause, then a shunt might be the way forward, but firstly if it is IJV compression still causing it, then it would be sensible to remove the source of the compression… and secondly the shunts aren’t an easy fix, there can be quite a few issues with these. One of our Mod Support team , Merl @Mod_support has much more knowledge about this than we do, here’s a link to some info:
hEDS, ES and lumbar shunt - Welcome / New User Help - Living with Eagle
Let us know how you get on today, I hope there’s clarity and not more complications! 