A Combination of Ultrasound-guided Popliteal Sciatic Nerve Block and Adductor Canal Block as a Sole Anaesthetic Technique for below Knee Amputation in High-risk Patients: A Case Series. - SANDHYA, M. K.; SHENOY, SAMBHRAM; SHETTY, SUDHAM RAMESH; CHANAKYA, ADIRAJU (Journal of Clinical & Diagnostic Research, 2023)