What is the association between the EndoPAT™ and BAUS (Brachial Artery Ultrasound)?
BAUS is a common research method for peripheral, noninvasive assessment of endothelial function. It differs from EndoPAT™ in several ways. While the BAUS assesses a single conduit vessel, EndoPAT™ measures several vascular beds, composed of small vessels and microcirculation. Furthermore, EndoPAT™ corrects for systemic changes by a simultaneous measurement from the (un-occluded) contra-lateral arm. With minimal training necessary, EndoPAT™ is practically operator independent, while BAUS requires a trained ultrasound technician and is highly user-dependent in both data acquisition and analysis. Furthermore, the response measured with EndoPAT™ has a much larger dynamic range (hundreds of %) than the miniscule changes assessed by BAUS (around 10% for a normal response).Several studies have simultaneously measured Flow-Mediated Dilatation (FMD) with EndoPAT™ and BAUS. Kuvin et al.(8) at the Tufts Medical Center, Boston, demonstrated a significant correlation between the two methods (r=0.55
