To investigate the clinical value of quantitative analysis of peri-operative foot supply through CT perfusion in patients with critical limb ischemia

Inclusion Criteria:

• 18 to 80 years old;
• CLI patients with Fontaine grade III-IV or Rutherford grade 4-6 and underwent a successful revascularization;
• Patients completed both pre- and post-operative CTP workups;
• Patients signed the informed consent form and be able to complete the clinical follow-up for 12 months.

Exclusion Criteria:

• Patients has participated in other clinical studies;
• Patients with Heart failure (NYHA III/IV)/right to left shunt heart disease/severe aortic and mitral insufficiency/acute coronary syndrome/malignant arrhythmia/severe pulmonary hypertension (pulmonary artery pressure at least 90 mmHg)/moderate to severe renal insufficiency (creatinine clearance rate<60 ml/min)
• Any allergic constitution;
• Pregnancy and childbirth;
• Life expectancy<12 months.

patients with critical limb ischemia, who completed both pre- and post-operative CTP workups