A 57- year-old female presents with bilateral lower extremity swelling. The patient has a history of noma. What should the vascular technologist be concerned about in this patient? 2. During inferior vena cava and vein ultrasound evaluation a thrombus is noted in the right external vein . Describe the spectral Doppler findings in the following vessels , including responses to distal augmentation maneuvers a Right common femoral vein b Right common vein Inferior vena cava d . Left common vein