Communicating veins are veins that communicate two different points of the venous system.

If there is sudden filling at this point it indicates that the communicating veins are competent but the superficial veins are incompetent.

The surgical treatment involves the resection of the extracranial venous package and ligation of the emissary communicating vein.

Communicating veins (or perforator veins) are veins that directly connect superficial veins to deep veins.

The foramen allows for the passage of the spinal nerve root, dorsal root ganglion, the spinal artery of the segmental artery, communicating veins between the internal and external plexuses, recurrent meningeal (sinu-vertebral) nerves, and transforaminal ligaments.

For example, a possible outcome of the test would be negative-positive meaning that the initial phase of the test was negative indicating competence in the communicating veins and the second phase of the test was positive meaning that there is superficial vein incompetence.