The effect of patient positions on perfusion index

Abstract

Background: The optimal position for surgery is one in which the patient is provided the best possible surgical intervention and put at minimum risk. Different surgical positions may cause changes in tissue perfusion. This study investigates the relationship between surgical patient positions and perfusion index. Methods: A sample of 61 healthy individuals with no peripheral circulatory disorders, chronic diseases, or anemia was included in this study. Participants held six different 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). Perfusion index values were then measured and recorded after individuals held their positions for five minutes. Results: Participants' perfusion index values were affected by different body positions (p<0.05). Perfusion index was lowest in the sitting position (4.5±2.5) and highest in individuals with Trendelenburg position (7.8±3.8). Conclusion: Different body positions can cause changes in tissue perfusion. This should be considered in patient follow-up along with the perfusion index.