Ultrasound-Guided Combined Femoral and Popliteal-Sciatic Nerve Block for Foot Debridement in a Patient With Peripheral Arterial Disease, Heart Failure With Reduced Ejection Fraction, and Pulmonary Oedema: A High-Risk Case Report. OAIJMR 2026, 6 (2), 220-234. https://doi.org/10.37275/oaijmr.v6i2.888.