Ординатура / Хирургия / Библиотека им академика М.И. Перельмана / Книга_770_Библиотеки_им_академика_М_И_Перельмана

The use of oral contrast as a faecal tagging agent has become integral to the CTC procedure and has resulted in the increased sensitivity of the test to rival OC [4]. There remains no standardi­sation in preparations or protocols for CTC, and these can further differ between hospitals due to individual contracts, pharmacy availability, and clinician preferences. Research has shown that the use of sodium amidotrizoate 100 mg/meglu­mine amidotrizoate 660 mg (Gastrogran®) as both a laxative and faecal tagging agent combined with an effective 24h low residue diet [5] or clear liquid diet [6] can result in highly diagnostic images. The high osmolality of Gastrogran® draws uid into the colonic lumen and increases the density of the residual uid [7]. Further research into this has shown using Gastrogran® in a split bolus regime (75 mL/25 mL) split 24h prior to the test consistently gives better colonic lavage and impacts the patient less, although this study was of 100 patients with a mean age of 76years [8]. However, with the use of Gastrogran® any remaining intra­luminal uid is of low viscosity, identiable as ‘tagged uid’ and moves easily with the move­ment of the patient [8]. Therefore, the use of faecal tagging is recommended by gastrointesti­nal imaging groups in optimising CTC out­comes [3, 9].