The evaluation of methemoglobinemia and hemodynamic parameters on patients who were applied retroclavicular and axillary block technique by using ultrasonography on upper extremity operations [Üst Ekstremite Operasyonlarında Ultrasonografi Eşliğinde Retroklaviküler ve Aksiller Blok Tekniği Uygulanan Hastalarda Hemodinamik Parametrelerin ve Methemoglobineminin Değerlendirilmesi]

Objective: Our targets in this research are; measuring the changes on hemodynamic parameters and methemoglobin levels non-invasively by using pulse co-oxymeter (Radical 7 Masimo USA), early diagnosis of methemoglobinemia which can be due to local anesthetic substance and preventing its complications, evaluation of changes on hemodynamic parameters due to methemoglobinemia on patients who were applied retroclavicular and axillary blocks on upper extremity surgeries. Material and Methods: 40 patients at the age of between 18-70 who will have a surgery of hand, wrist, forearm and elbow by Orthopedics and Traumatol-ogy Department in American Society of Anesthesiologists I-III groups are taken into this research after the patient's and ethics committee's approval are taken. Our research was done prospectively. Ultrasound guided retroclavicular or axillary block was applied to all patients with local anesthetic solution which was prepared as; bupivacaine 0.5% 1 mg/kg+prilocaine 2% 6 mg/kg+NaCl 0.9% until reaching the solution limit of 40 cc. Basal values of heart rate, diastolic blood pressure, systolic blood pressure, mean arterial pressure, peripheric oxygen saturation, sensorial and motor block durations, perfusion index, and methemoglobin values and these values at the minutes of 10th, 20th, 30th were recorded. Results: When we compare the perfusion index values of the patients in research in both groups which were measured at different times; the difference between groups was insignificant on basal and 30th minute values but the difference was significant on 10th and 20th minute. In retroclavicular block and axillary block patients, the difference in methemoglobin levels which were measured on different times was significant. Conclusion: There was increase in methemoglobin levels that were measured by pulse-oxymeter in retroclavicular and axillary block patients but we thought that, this increasing was not enough to cause complication. Sensorial and motor block were established in all patients in each groups on 30th minute. Copyright © 2018 by Türkiye Klinikleri