Hello. Type ⅱ internal fistula after stent implantation of abdominal aortic aneurysm is blood from the anterior branch of abdominal aorta, with low pressure and no need for special treatment. Most of them can form thrombus occlusion by themselves. There is no need to replace the stent after stent implantation, but regular follow-up is needed to understand the matching between the stent and its own blood vessels. If problems are found, they need to be dealt with in time.

(Dr. Huang Bin from West China Hospital solemnly reminds me that I can't fully understand my illness because I can't see the patient face to face. The above suggestions are for reference only. Please go to the hospital for specific diagnosis and treatment under the guidance of a doctor! )