Clinical Application Of Multislice CT Enterography With Hypsi Mannitol Salt Water As Oral Contrast

Objective To assess the feasibility and value of multislice CT enterography (MSCTE) with large dose ecnomy and convenience orally administered hypsi mannitol salt water(2.5% mannitol and 1.5%NaCl salt water)as negative contrast in demonstrating normal and abnormal small bowel. Methods 81 patients suffered from digestive tube disease and suspected of various kinds of small intestinal diseases were examined(male/female=47/34,26—81y,average57.8y).About 1500ml—3000ml slightly hypsi mannitol as oral negative contrast agent was administered , 20mg of Raceanisodamine hydrochloride was injected intramuscularly within 90 minutes. CT scanning was performed on the GE Lightspeed 64 or GE Lightspeed 16 scanner 20 minutes later, All patients were interviewed on their tolerance of the procedure. Imaging data were post processed with coronal,sagittal and oblique reconstruction,multiplanar reformation(MPR) , maximum intensity projection(MIP) , and volumer endering technique(VRT),and then the filling degree of stomach ,intestinand and colon be classified as satisfactery,better and no satesfactery. The lengeh and superposition of small intesin be classified as dense-type,uniformity-type and straggling-type. The maximum outer diameters of duodenum,jejunum,and ileum were measured respectively in different segments .The CT values of bowel wall in arterial phase and venous phase were measured with ROI ,in which classify markable enhance (>90HU),enhance (60-90HU) and mild enhance (<60) by the values. CT features of various kinds of small bowel diseases was analyzed .Results The slightly hypsi mannitol brinish was good and acceptable by patients, except 5 senility weakling patients have diarrhea. the filling degree of stomach ,intestinand and colon be classified as satisfactery 46 cases,better 23 cases and no satesfactery 12 cases. The maximum outer diameters of small bowel respectively in different segments by statistical analysis is so, duodenum 24mm±4.5mm, jejunum 24mm±3.9mm, and ileum 23mm±3.3mm. The lengeh and superposition of small intesin be classified as dense-type 7 cases,uniformity-type 58 cases and straggling-type 16 cases .The CT values of bowel wall in arterial phase and venous phase were measured with ROI,in which classify obvious enhance 9 cases (arterial phase over venous phase 3 cases) ,midrange enhance60 cases (arterial phase over venous phase 17 cases) and light enhance 11 cases(arterial phase over venous phase 3 cases) by the values. spectively CT features of many kinds of small bowel diseases such as tumors, Crohn′s disease, and post operative adhesion,etc were clearly displayed,including mass,luminal stenosis or dilatation,wall thickening,mural enhancement,mesenteric fibro fatty change,mesenteric vasculature change,enlarged lymphnodes by MSCTE .Conclusion MSCTE with hypsi mannitol salt water brinish negative contrast for distending the smallbowel is a simple and reliable method for evaluating small bowel diseases.