Effects of digital block on pulse oximetry in shock simulation

Abstract

INTRODUCTION: Pulse oximetry is impaired by hypotension and peripheral vasoconstriction (1). Digital block may cause increase in tissue perfusion and hence improving the parameters of pulse oximetry (2). The purpose of this study was to investigate the effect of digital block on spaO 2 , lag time and height of plethysmographic wave (PW) of pulse oximeter, in presence of shock simulation in upper extremity.