How is CT colonography (CTC) performed?

Colonic Cleansing

  • Dry Prep
    • 10 oz Mg Citrate
    • 45 ml Na Phosphate-contraindicated in pts with renal or cardiac failure
  • Wet Prep
    • 4 liters Polyethylene Glycol

+

5 mg Bisacodyl tabs + suppository 

Colonic Distention 

  • CO2 insufflation
    • High lipid solubility
    • High partial pressure gradient electronic, preset P= 25 mm HG

 

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