Could a device used in sports help reduce traumatic brain injuries?

Hmmmmmm
............... Very interesting, Dale! I wonder...

By slowing the blood flow, it backfills blood in the brain keeping the brain from moving around in the skull, Hoey said. Concussions are largely a result of the brain sloshing around inside the skull and bruising or damaging its tissue when it collides with the interior of the skull.
The jugular vein compression has been validated by a 2017 study at Walter Reed National Military Medical Center showing protection against blast-induced traumatic brain injury by increasing brain volume.
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They would have to wear this virtually all the time that they were stationed in a threat zone. What's the long term impact of that?