Source:Academic Radiology
Author(s): Anne G. Carroll, Richard G. Kavanagh, Caoilfhionn Ni Leidhin, Noelle M. Cullinan, Lisa P. Lavelle, Dermot E. Malone
Rationale and ObjectivesThe purpose of this study was to critically appraise and compare the diagnostic performance of imaging modalities that are used for the diagnosis of intussusception and methods used in the treatment of ileocolic intussusception.MethodsA focused clinical question was constructed and the literature was searched using the patient, intervention, comparison, outcome (PICO) method comparing radiography, ultrasound, and computed tomography in the detection of intussusception. The same methods were used to compare pneumatic (gas) reduction and hydrostatic (liquid) reduction using saline, water-soluble contrast, and barium. Retrieved articles were appraised and assigned a level of evidence based on the Oxford University Centre for Evidence-Based Medicine hierarchy of validity for diagnostic studies.ResultsThe retrieved sensitivity for the diagnosis of intussusception using plain radiography is 48% (95% confidence interval [CI], 44%–52%), with a specificity of 21% (95% CI, 18%–24%). The retrieved sensitivity for the diagnosis of intussusception using ultrasound is 97.9% (95% CI, 95%–100%), with a specificity of 97.8% (95% CI, 97%–99%). Based on a good quality meta-analysis, the combined success rate of gas enema reduction was shown to be 82.7% (95% CI, 79.9%–85.6%) compared to a combined success rate of 69.6% (95% CI, 65.0%–74.1%) for liquid enema reduction.ConclusionsThe best available evidence recommends ultrasound as the diagnostic modality of choice for the diagnosis of ileocolic intussusception in children. In stable children without signs of peritonism, nonoperative reduction is the treatment of choice. Pneumatic (gas) reduction enema has been shown to be superior to hydrostatic (liquid) enema reduction.
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