[Evaluation of revascularization efficiency using near-infrared oximetry in patients with diabetic foot syndrome]

To evaluate prognostic significance of tissue oximetry in healing of trophic defects in patients with diabetic foot syndrome (DFS) after endovascular revascularization.

In 42 patients with DFS, tissue oximetry was performed in angiosome projection with the FORE-SIGHT MC-2000 (CASMED) device before and the next day after revascularization of lower limb arteries. The 1st group included 30 patients with wound healing throughout 3 months, the 2nd group included 12 patients with amputation or no healing of trophic defects.

Direct revascularization was more common in the 1st group (p=0.001). On the day after intervention, oxygen saturation (StO₂) increased in all angiosomes in both groups (p<0.05). StO₂ increment differed significantly between groups in all angiosomes except for point I (p<0.05). According to ROC analysis, StO₂ increment by 4.5% in absolute values and 7.9% in percentage leads to trophic defect healing within 3 months (sensitivity and specificity were 76.7% and 66.7% for absolute values, 80% and 58.3% for percentage, respectively).

Evaluation of StO₂ in target angiosome may be valuable to predict trophic defect healing after endovascular surgery.