Classification Closed-loop obstruction Fixation of bowel loop: Coffee bean sign:gas filled loop pseudotumor:fluid-filled loop U-shaped dilated bowel loop Increasing intraluminal fluid Beak sign:point of obstruction -Whirl sign:twisting of bowel
Classification Closed-loop obstruction – Fixation of bowel loop: Coffee bean sign: gas filled loop pseudotumor: fluid-filled loop U-shaped dilated bowel loop – Increasing intraluminal fluid – Beak sign: point of obstruction – Whirl sign: twisting of bowel
单纯性肠梗阻
单纯性肠梗阻 阶梯状气液平 大跨度肠袢 鱼肋征
肠梗阻 ■机械性肠梗阻 一单纯性肠梗阻：肠管通畅性障碍 -绞窄性肠梗阻：肠管通畅性障碍伴有血运障碍 ■动力性肠梗阻 -麻痹性肠梗阻： -痉挛性肠梗阻： ■血运性肠梗阻：肠系膜动脉血栓或栓塞所致 钡剂造影须慎重使用，钡剂吸收水分会加重梗阻
肠梗阻 机械性肠梗阻 – 单纯性肠梗阻：肠管通畅性障碍 – 绞窄性肠梗阻：肠管通畅性障碍伴有血运障碍 动力性肠梗阻 – 麻痹性肠梗阻： – 痉挛性肠梗阻： 血运性肠梗阻：肠系膜动脉血栓或栓塞所致 钡剂造影须慎重使用，钡剂吸收水分会加重梗阻
绞窄性肠梗阻 Strangulated obstruction Triad: closed-loop obstruction of the involved segment (majority of cases) Mechanical obstruction proximal to the involved segment Venous congestion of the involved loop Abdominal plain film signs for volvulus(肠扭转)or closed-loop obstruction bowel thickening CT has 63%~100%detection rate!!! Poor/no enhancement of bowel wall Mesenteric haziness due to edema
绞窄性肠梗阻 Strangulated obstruction Triad: – closed-loop obstruction of the involved segment (majority of cases) – Mechanical obstruction proximal to the involved segment – Venous congestion of the involved loop Abdominal plain film : – signs for volvulus（肠扭转） or closed-loop obstruction + bowel thickening CT has 63%~100% detection rate!!! – Poor/no enhancement of bowel wall – Mesenteric haziness due to edema