クローン病
In a review of 22,840 cases, the capsule was retained 1.4% of the time, with Crohn's disease a common cause; most were surgically removed. The rate of capsule retention varies by the indication for the procedure, with the highest rate seen with known Crohn's disease (5-13%), followed by obscure gastrointestinal bleeding (1.5%), suspected Crohn's disease (1.4%), and healthy volunteers (0%). Risk factors for capsule retention include Crohn's disease, NSAID use, and abdominal radiation.