Tapar H, et al. - Researchers determined the link between surgical patient positions [supine, prone, 45-degree sitting-supine, 45-degree supine with legs lifted, Trendelenburg (45-degrees head down), and reverse Trendelenburg (45-degrees head up)] and perfusion index in a sample of 61 healthy individuals with no peripheral circulatory disorders, chronic diseases, or anemia. After holding the positions for five minutes by the individuals, perfusion index values were measured and recorded. According to findings, different body positions can cause changes in tissue perfusion. The lowest and the highest perfusion index were seen in the sitting position (4.5 ± 2.5) and in individuals with Trendelenburg position (7.8 ± 3.8), respectively. This was recommended to be taken into account in patient follow-up along with the perfusion index.