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BACKGROUND AND STUDY AIMS: Capsule endoscopy is increasingly reported as an important diagnostic procedure in patients with known or suspected Crohn's disease, but its clinical utility in patients with ulcerative colitis or unclassified type inflammatory bowel disease (IBDU) is unclear. The aim of our study was to determine the diagnostic yield of capsule endoscopy for small-bowel disease in patients with ulcerative colitis and IBDU. PATIENTS AND METHODS: All data from patients with a history of ulcerative colitis or IBDU who underwent capsule endoscopy between October 2001 and August 2005 were analyzed for procedure indications and findings. Images were reviewed by an experienced capsule endoscopist. The finding of multiple ulcerations (three or more) on capsule endoscopy was classified as diagnostic of small-bowel Crohn's disease. RESULTS: 120 patients had undergone 122 capsule endoscopy procedures. Overall, 19 of 120 patients (15.8 %) had capsule endoscopy findings consistent with the diagnosis of Crohn's disease. The proportion of patients with small-bowel disease was significantly higher among patients with a history of colectomy (7 of 21 patients, 33 %) compared with those without colectomy (12/99, 12 %) ( P = 0.04). Among patients with positive findings on capsule endoscopy, 18 had also previously undergone a small-bowel follow-through study and only one showed findings consistent with Crohn's disease. CONCLUSIONS: Many patients with a diagnosis of ulcerative colitis and atypical features or IBDU may have small-bowel findings on capsule endoscopy that are consistent with Crohn's disease. Capsule endoscopy should be considered in ulcerative colitis patients with atypical clinical features particularly after colectomy. [ABSTRACT FROM AUTHOR]

Summary Acoustic radiation from a finite spherical source, vibrating with an arbitrary, axisymmetric, time-harmonic surface velocity distribution, while immersed at an arbitrary point near a poroelastic sphere in an unbounded ideal fluid medium is analyzed in an exact manner. The formulation utilizes the appropriate wave-field expansions, along with the translational addition theorems for spherical wave functions in combination with the Biot classic model for the description of poroelastic material behavior, to develop a closed-form solution in form of infinite series. The prime objective is to investigate the dynamic poroelasticity effects on acoustic radiation and its associated field quantities. The analytical results are illustrated with a numerical example, in which the spherical source, excited in vibrational modes of zero-th or first order, is positioned near a water-saturated sandstone sphere. The basic acoustic field quantities such as the modal acoustic radiation impedance load on the source, the radiated far-field pressure directivity pattern, and the radial acoustic intensity distribution are evaluated and discussed for representative values of the parameters characterizing the system. [ABSTRACT FROM AUTHOR]