The clinical characteristic and risk of capsule incomplete and retention in XXXX .

@entity1 @entity30 @entity1321 @entity490
OBJECTIVE: To evaluate capsule endoscopy in terms of incomplete examinations and capsule retentions, to describe the characteristic of these events and to find risk factors for these events. METHODS: This retrospective and consecutive case-control study includes data of 204 capsule enteroscopy examinations in @entity1 with @entity30 , performed at the first hospital affiliated to zhejiang university medical school from June 2003 to April 2014. RESULTS: The frequency of complete examinations was 56.9%. Male gender (OR=2.48, P=0.026), @entity490 (OR=2.88, P=0.002), melena/bloody stools/OB+ (OR=3.34, P=0.009) were risk factors for an incomplete examination. Capsule retention occurred in 8.33% (n=17). The ratio of male and female was 12:5. While the average age of these @entity1 was 42.2  16.2, and the average course of disease was 52.5  46.6 months. Of the seventeen cases of retained capsules, four @entity1 chose to undergo surgery to remove the capsule for occurring symptoms of @entity1321 , spontaneous passage occurred in twelve @entity1 after medical treatment, and one @entity1 still have the capsule retained after 16 months of expectation. The longest capsule retained time in @entity1 was four years. Risk factors for capsule retention was abdominal distention (OR=8.45, P=0.006). CONCLUSIONS: The majority of capsule endoscopy retention develops into spontaneous passage after medical treatment. Therefore capsule endoscopy is considered a safe procedure, although obstructive symptoms and serious complications due to capsule retention can be found in @entity1 with known @entity30 .
