Abstract
Purpose. PillCam SB2 capsule endoscopy, an upgraded version of widely used SB capsule endoscopy, was examined for its performance by comparing with SB. Methods. Examinees with various indications were enrolled for SB2 capsule endoscopy; subjects were also enlisted for the old SB capsule endoscopy. Number of photo images containing papilla of Vater was counted. Shape of the papilla seen in each image was evaluated by scoring 3 (fully observable papilla), 2 (more than half outline), or 1 (less than half outline) points. Images obtained from SB and SB2 were also subjectively compared; resolution and brightness were scored by six experienced endoscopists. Results. Baseline characteristics of two study groups (n = 30 each) were not significantly different. Number of images of the papilla revealed to show similar results between SB (3.1 ± 1.1, range 1~5) and SB2 (3.1 ± 1.5, range 1~8) (P = 0.62). The maximum points of outline of papilla evaluated from each subject were also similar between two groups. New SB2 revealed to be superior to SB in terms of resolution but not significantly different in brightness. Conclusion. Our study showed that superiority of SB2 over SB is rather marginal on examining duodenal papilla.
Highlights
Wireless capsule endoscopy (WCE) is widely used for diagnosing various small bowel diseases
In our previous report that studied the limited ability of WCE to detect duodenal papilla, we proved that a technologic improvement of WCE is essential [1]
One recent study addressed their result of digital capsule endoscopic images taken at a slower speed (i.e., 1 frame per second) does not deteriorate the overall performance of WCE, compared with the ordinary study speed of 2 frames per second [2]
Summary
Wireless capsule endoscopy (WCE) is widely used for diagnosing various small bowel diseases. This convenient diagnostic tool has several inherent drawbacks; inability of biopsy, lengthy time for interpretation, lack of active control of the device that just floats about the gut in accordance with peristalsis, and so forth. PillCam SB2 video capsule is a recently released version of PillCam SB video capsule It is characterized with a wider visual field, automatic light control, and new capsule lenses, enabling improved visualization of small bowel mucosa. After release of the PillCam SB2 to the local market of Korea, authors performed an investigation of comparing images and diagnostic yield of SB2 capsule with the old model SB, using normally positioned duodenal papilla as a landmark
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