Relationship between the Controlling Nutritional Status Score and Infrainguinal Bypass Surgery Outcomes in Patients with Chronic Limb-threatening Ischemia

Objective: We investigated the association between Controlling Nutritional Status (CONUT) scores and the outcomes of bypass surgery in patients with chronic limb-threatening ischemia (CLTI). Methods: We retrospectively calculated preoperative CONUT scores in 118 patients (127 limbs) with CLTI who underwent infrainguinal bypass surgery. Survival, graft patency, and limb salvage were compared between the high and low CONUT score groups based on the respective cutoff points. Results: The median and mean CONUT scores were 5 and 4.8, respectively. The postoperative survival rate was lower in the high CONUT score (3–12) group than in the low CONUT score (0–2) group (P=0.0043). The limb salvage rate after arterial reconstruction was also significantly lower in the high CONUT score (8–12) group than in the low CONUT score (0–7) group (P=0.0009). Conclusions: The CONUT score can predict infrainguinal bypass surgery outcomes in patients with CLTI. (This is a translation of J Jpn Coll Angiol 2020; 60: 35–41.)