Hemodynamic obstruction is the obstruction of the passage of intestinal contents and the absence of blood flow in the intestinal canal. It is a group of clinical syndromes due to the failure of the intestinal contents to run smoothly to the distal end for various reasons, called intestinal obstruction, and is one of the common acute abdominal conditions in surgery. It is one of the common surgical emergencies. It is often clinically classified into mechanical intestinal obstruction, dynamic intestinal obstruction and hemodynamic intestinal obstruction according to its cause. Causes: Blood flow to the intestinal wall is impaired by mesenteric vascular embolism or thrombosis, followed by intestinal paralysis, resulting in intestinal strangulation and necrosis, which prevents the normal operation of intestinal contents. Easily confused symptoms: 1, closed collaterals intestinal obstruction: refers to a section of small intestine intestinal curves at both ends and its mesenteric vascular obstruction at the same time, so that intestinal obstruction is accompanied by obstruction of the blood supply of the intestinal canal (i.e. closed collaterals). 2.Low small intestinal obstruction: a clinical manifestation of intestinal obstruction. Intestinal obstruction (intestinalobstruction, ileus) refers to the obstruction of the passage of intestinal contents in the intestine. 3.roundworm intestinal obstruction: caused by mechanical blockage of the intestinal canal due to the agglomeration of roundworms, which occupies the first place in non-tumor blockage intestinal obstruction, mostly simple and partial intestinal obstruction.