CT Imaging of Acute Bowel Ischemia and Infarction - Department of ...

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Pathology Etiologies: Non-occlusive Lupus
CT Technique: Ischemic Bowel Protocol 3 Types of contrast (a) IV (150 cc via mechanical injector at a rate of 2-4 ml/sec) (b) Oral (c) Rectal NB: Bowel distension (i.e. assess bowel wall thickness) NB: Positive vs. negative contrast Positive contrast indicated in suspected bowel obstruction and advantageous for delineation of inner mural layer in setting of hypoattenuating mucosa. Otherwise, negative contrast allows optimal delineation of mural layers. 3 Phases (a) Unenhanced •Differentiating hyperattenuating bowel wall caused by hemorrhage from that caused by hyperperfusion •Background atherosclerotic disease •Hyperattenuating intravascular clot (b) Arterial (30 sec) •Arterial occlusion (c) Portovenous (90 sec) •Venous occlusion •Assessment of the remainder of the organs Triple contrast Triple phased Triple planar 3 Planes (a) Axial (b) Coronal (c) Sagittal
Page 1 and 2: CT Imaging of Acute Bowel Ischemia
Page 3 and 4: Anatomy Vascular Supply of Bowel: A
Page 5 and 6: Anatomy Vascular Supply of Bowel: V
Page 7 and 8: Pathology Ischemia and Infarction:
Page 9 and 10: Pathology Etiologies 1. Occlusive (
Page 11 and 12: Pathology Etiologies: Occlusive SMA
Page 13 and 14: Pathology Etiologies: Occlusive Aor
Page 15: Pathology Etiologies: Non-occlusive
Page 19 and 20: CT Findings: Approach • Distribut
Page 21 and 22: CT Findings: Bowel Thickening • s
Page 23 and 24: CT Findings: Fluid • (a) Fat stra
Page 25 and 26: CT Findings: Air Pneumotosis Portal
Page 27 and 28: CT Findings: Complications • Perf
Page 29 and 30: Cases Case #1: Large bowel ischemia
Page 31 and 32: Cases Case #2: Large bowel ischemia
Page 33 and 34: Cases Case #3: Small bowel Ischemia
Page 35 and 36: Cases Case #4: Small and large bowe
Page 37 and 38: Cases Case #5: Small bowel obstruct
Page 39: Cases 1. 2678623 = large bowel isch

CT Imaging of Acute Bowel Ischemia and Infarction - Department of ...

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