Abstract
Evaluation of blood flow in patients with LEAD（Lower extremity arterial disease）is important for limb salvage. Traditional methodologies for evaluating blood flow, such as the brachial-ankle artery blood pressure ratio（ABI）, skin perfusion pressure（SPP）, and transcutaneous partial pressure of oxygen（TcPO2）, while extensively used involve limitations including prolonged examination periods and discomfort during assessment. Furthermore, their application on curved skin surfaces such as toes or heels poses inherent challenges. Recently, regional oxygen saturation（rSO2）has emerged as a promising tool for evaluating limb blood flow in LEAD patients, leveraging near-infrared spectroscopy. In this study, we performed endovascular therapy and flap reconstruction in two LEAD patients with ischemic ulcers involving their heels. Throughout the perioperative phases, rSO2 values were monitored, and the selection of the skin flap was contingent upon these values. Our findings suggest that the measurement of rSO2 values is crucial for determining, appropriate strategies for revascularization and flap reconstruction in LEAD patients.
