Contraindications

1. Peritonitis
   
   
2. Unusually dilated bowel due to mechanical obstruction, paralytic ileus, or megacolon
   
   
3. Known hypersensitivity to iodinated contrast media
   
   
4. Ventriculoperitoneal shunt for hydrocephalus
   
   
5. Ileal loop
   
   
6. Skin infection at puncture site
   
   
7. Known bleeding disorder
   
   
8. Dehydration