Update on acute colonic pseudo-obstruction.

Acute colonic pseudo-obstruction is characterized by distention of the colon in the absence of mechanical obstruction. This presentation is typically related to recent surgery, severe illness, or medication. Nasogastric and rectal tube decompression and correction of electrolyte abnormalities are the standard of care. Colonoscopic decompression, performed in a number of these cases, was felt to be unwarranted in many situations and is associated with a high recurrence rate. Medical management beyond conservative measures has been limited. Medical therapy with pharmacologic agents such as erythromycin, metoclopromide, and cisapride was of limited use. Recent findings confirm that an older agent, neostigmine, provides excellent results, including colonic decompression and clinical improvement after administration. This suggests a new standard of care.