A surgical team in Maryland performed a case series of seventeen IJV decompression operations. The operations included styloidectomy, C1 shave, resection of the digastric muscle, and venolysis of the jugular. They had about 77% success rate.
I posted this paper partly because some members of this forum may wish to consult with these surgeons about IJV compression. (I don’t believe they are on the list).
https://www.jvsvenous.org/article/S2213-333X(24)00505-5/fulltext