The Analgesic Efficacy of Dexmedetomidine Versus Fentanyl as an Adjuvant to Bupivacaine in Ultrasound Guided Peripheral Nerve Blocks as a Solo Anesthetic Technique in High Risk Patients Undergoing Unilateral Above Knee Amputation .

The aim of this study is to compare the analgesic efficacy and safety of dexmedetomidine versus fentanyl as adjuvants to bupivacaine in ultrasound-guided combined supra-inguinal fascia iliaca and proximal sciatic nerve blocks used as a solo anesthetic technique in high-risk patients undergoing unilateral above knee amputation.