Özet:

The aim of this study is to evaluate perfusion index, skin temperature and average arterial pressure changes during spinal anesthesia and to determine the success of spinal anesthesia using perfusion index values. Method and Requirements: The study included a total of 128 patients with an American Society of Anesthesiologists (ASA) physical condition I-II, who suffered elective surgery under spinal anesthesia at the grade 10 (T10). The level of spinal anesthesia determined by the average arterial pressure, heart rate, body temperature, perfusion index and pinprick test; was recorded for 30 minutes after the anesthesia induction. Repeated measurements were used to evaluate post-spinal block changes and linear karma models were created. For perfusion index measurements in the second minute after anesthesia, time-connected ROC curves were established and cutting points were determined to predict the level of spinal anesthesia of T10. In addition, standard ROC curves for perfusion index rates were created. A significant linear increase in Perfusion index values (β=0.14, standard error = 0.01, p<0.001). The statistically meaningful time-related ROC curves were obtained for 6 minutes after and after anesthesia. After the fifth minute, the specificity was 100%. For the formation of the T10 spinal blockage in the 15th minute after anesthesia, the cutting point of the infusion index measurements in the 2nd minute was 2.40 (the remaining area under weight-EAA: 0.71, 95% confidence range-GA: 0.59-0.83, sensitivity: 47, specificity: 100%). In the standard ROC analysis, the area left under the curve was statistically meaningful for only the percentage of perfusion index in 2 minutes. All patients with perfusion index measurement above 2.4 in the second minute after anesthesia induction had reached the level of the T10 spinal block in the 15th minute after the induction. This finding should be supported by the increasing tendency in repeated perfusion index measurements. For patients with limited compliance with the Pinprick test, the adaptation of the findings of the study to the surgical practice can be considered.