Not all vein test are the same

Venous duplex ultrasounds are performed in the transverse and sagittal planes. Due to compression ultrasound being the gold standard most Sonographer's perform transverse compression first and focuson distal augmentation when assessing with Doppler. Most Sonographer's do not let the Doppler run and evaluate for phasicity or spontaneity the key indicators of a proximal obstruction. With compression established it is natural for the Sonographer to have mentally checked negative and perform...