“…Perfusion index derived from pulse oximetry provides a rapid indicator of microcirculatory changes and can help clinicians to detect abnormalities in the peripheral circulation. (2,3) This method reflects real-time alterations in peripheral blood flow through use of a pulse oximeter device, which delivers readings noninvasively and continuously; (4) however, it does have some flaws and limitations that should be accounted for during implementation. In this context, we believe that patient position is one of the important factors affecting the results of perfusion index measurement.…”