@BriCSP I agree with that assessment. It is temporary compression. It is only a problem if it happens on neutral head position. On upright position, IJVs barely drain the brain anyways. Drainage is mostly done by Collateral veins through Condylar & Vertebral Venous Plexus (VVP) so any effect on drainage should be minimal. However, most of the studies including this one is done on supine position where IJV become prominent in draining the brain so any collaterals that are seen could only mean that your IJVs are somewhat restricted and Collaterals come to the rescue.
I am not a doctor but IJV stenting, in my opinion, should be entertained as the last resort for opening up IJVs. In general, the area of the IJV and the type of compression needs to be taken into account to decide on stenting. If the compression is induced by bone (Styloid & C1…etc) surgery should be the first line of treatment as any stent put in will be crashed by the bone which will even create more problems. However if the compression is soft tissue such as muscle or blood vessel, stents do make sense as long as the area of compression is far away from any bone.