@BuckeyePrincess - I’m very sorry you & your daughter will need to travel to CO again. I was also hoping her healing journey was continuing to move in a positive direction. I haven’t heard of massaging the omohyoid to get it to stop causing IJV compression though here are links to a couple of research articles where IJV compression via omohyoid is discussed:
Dr. Hepworth refers his patients with spinal CSF leaks to Dr. Callen at U Colorado Anshutz. If the leak is cerebral, I’m not sure to whom he refers patients.
I hope & will pray that the MRI cisternogram is able to show precisely what is going on so it can be repaired. Also, if the omohyoid caused IJV compression persists, I hope Dr. Hepworth will suggest another treatment option.