The technic1 here described is based on the fact that compression of the healthy jugular vein while the other jugular vein is obstructed in most cases causes congestion of the wide venous spaces of the nasal turbinates. The swelling of the conchae can be seen in some cases by anterior rhinoscopic examination (fig. 1), but it can be clearly demonstrated in every case by means of a simple apparatus, the nasal plethysmometer (fig. 2).
The nasal plethysmometer2 consists of two small inflatable rubber balloons, A and B, each of which is mounted on one leg of a small manometer, C. When one of these balloons or both are introduced into the nose, one can blow them up without displacing the meniscuses, by means of the bridge, D, while the clip, E, is placed on the rubber connection, F. When the bridge is closed with the clip, E, on the rubber
VAN DISHOECK HAE. NASAL PLETHYSMOMETRY AS A NEW TEST FOR SINUS THROMBOSIS. Arch Otolaryngol. 1940;31(4):588–596. doi:10.1001/archotol.1940.00660010593002