When the primary venous assessment is for valvular function, the limb must be placed in a dependent position. Standing is the preferred position if not constrained by the patient's physical condition. Sitting or reverse Trendelenburg may be used if the patient cannot stand.
Manual distal compression or automated rapid cuff inflation/deflation devices must be used as provocative maneuvers assessing valvular function to determine competency or reflux in all lower extremity venous segments evaluated.
