LAUSR

Purpose We evaluated possible association of decreased psoas muscle area (PMA) after endovascular aneurysm repair (EVAR) by measuring the area of muscle in computed tomographic (CT) images. Materials and Methods We retrospectively reviewed CT images of 201 consecutive patients who underwent EVAR at our institution between April 1, 2015, and November 9, 2018, and compared them with images of 75 consecutive patients with no history of EVAR, who served as controls and underwent thoracic endovascular aortic repair (TEVAR) during the same period. We investigated EVAR and possible associated factors that might be potential predictors of decrease in PMA. Results Those patients with a history of EVAR demonstrated significantly greater mean decrease in PMA than those with a history of TEVAR after the repair procedure (mean 6.25% (8.5); P  < 0.001; odds ratio [OR], 3.63; 95% confidence interval [CI] 1.90–6.90). Conclusion Although EVAR is a less stressful procedure than other major abdominal surgeries, we identified it as an independent predictor of decreased area of the psoas muscle. Thus, our results might encourage post-procedural evaluation of frailty associated with psoas muscle function and prescription of appropriate rehabilitation interventions after EVAR to help prevent deterioration of patients’ abilities.