Doppler based algorithm for detection of blood flow restriction in vertebral artery

Purpose: Arterial diameter and flow velocity are manipulated variables of flow volume and local blood pressure drop. The total pressure drop in right vertebral artery (VA) equals left. Based on here we propose an algorithm for detection of flow restriction in VA by standard extracranial vascular sonography of V2. Material and method: The blood pressure drop in VA in the quasi-stable laminar enddiastolic flow phase results from the sum of pressure drops dP, thus in sample volume of vascular sonography of V2. After Hagen-Poiseuille is valid dP = k*v/d2, whereby v represents maximum enddiastolic flow velocity, d di…