Abstract: Intraabdominal hypertension affects renal blood flow and perfusion through a series of mechanisms,  resulting in a series of pathophysiological changes,  which start from local blood flow disorders,  and end with  serious organ failure. It is important to understand the physiology of renal blood flow and perfusion as well as the pathophysiology of renal hemodynamic changes in patients with intraabdominal hypertension,  which is helpful for early identification of renal insufficiency caused  by  intraabdominal hypertension. Ultrasound,  CT,  and MRI can be  adopted to evaluate the changes of renal blood flow and perfusion in early stage,  and promote early intervention,  which are of  great clinical significance for early diagnosis and protection of renal function in acute kidney injury caused by intraabdominal hypertension.

Key words: renal insufficiency, intraabdominal hypertension, renal blood flow, renal perfusion