Kombine Lomber Pleksus ve Siyatik Sinir Bloğu Yapılan Cerrahilerde Blok Kalitesinin Değerlendirilmesinde Perfüzyon İndeksi (PI), Kızılötesi Spektrometre (NIRS), ve Noninvazif Total Hemoglobin Monitörizasyonu (SpHb) Yöntemlerinin Karşılaştırılması
Year: 2026
Type: article
Abstract: Yöntemlerinin KarşılaştırılmasıComparison of Perfusion Index (PI), Infrared Spectrometry (NIRS), and Noninvasive Total Hemoglobin Monitoring (SpHb) Methods for the Evaluation of Block Quality in Lower Extremity Surgery with Combined Lumbar Plexus and Sciatic Nerve Block ABSTRACT Objective: The aim of this study was to compare the efficacy of Near Infrared Spectroscopy (NIRS), Perfusion Index (PI), and Noninvasive Total Hemoglobin Monitoring (SpHb) methods in evaluating block quality in lower extremity surgeries performed with combined lumbar plexus and sciatic nerve block.Method: The study included 50 orthopedic patients aged 18-65 years undergoing lower extremity surgery.Vital signs (systolic and diastolic blood pressure, heart rate, and oxygen saturation), tissue oxygen saturation (rSO₂), PI, and SpHb values were recorded 5 minutes before, immediately after, and every 5 minutes up to 25 minutes following the block.Data were compared between blocked and unblocked extremities.Results: Heart rate and oxygen saturation showed no significant change (p>0.05).Mean arterial pressure increased significantly (p=0.001),but this was not clinically relevant.A significant progressive increase in PI was observed in the blocked limb (p=0.001),confirming its value as an early and objective indicator of block success.In contrast, rSO₂ and SpHb did not demonstrate significant changes (p>0.05),suggesting limited sensitivity of these parameters in detecting block efficacy in lower extremity surgery.Conclusion: Perfusion index appears to be a reliable and effective parameter for assessing block success in lower extremity surgeries.However, the limited predictive value of rSO₂ and SpHb in this context indicates that further prospective studies are needed to clarify their potential role.
Institution: Harran University
Language: English
Subfield: Anesthesiology and Pain Medicine
Field: Medicine
Domain: Health Sciences
Open Access status: bronze
OpenAlex ID: W7127037940