Clinical Endoscopy

The Korean Society of Gastrointestinal Endoscopy (대한소화기내시경학회)
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Capability of Radial- and Convex-Arrayed Echoendoscopes for Visualization of the Pancreatobiliary Junction

  • Received : 2017.06.14
  • Accepted : 2017.08.20
  • Published : 2018.05.30
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Abstract

Background/Aims: Although both radial- and convex-arrayed endoscopic ultrasonography (EUS) scopes are widely used for observational EUS examinations, there have been few comparative studies on their power of visualization. The aim of this study was to evaluate the capability of these EUS scopes for observation of the pancreatobiliary junction. Methods: The rate of successful visualization of the pancreatobiliary junction was retrospectively compared between a radial-arrayed and a convex-arrayed echoendoscope, from a prospectively maintained database. Study periods were defined as January 2010 to December 2012 for the radial group, and February 2015 to October 2016 for the convex group because the respective scope was mainly used during those periods. Results: During the study period, 1,660 cases with radial EUS and 1,984 cases with convex EUS were recruited. The success rates of observation of the pancreatobiliary junction were 80.0% and 89.5%, respectively (p<0.0001). Conclusions: The capability of visualization of the pancreatobiliary junction in observational EUS was found to be better with a convex-arrayed than with a radial-arrayed echoendoscope.

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References

  1. Sugiyama M, Atomi Y. Endoscopic ultrasonography for diagnosing choledocholithiasis: a prospective comparative study with ultrasonography and computed tomography. Gastrointest Endosc 1997;45:143-146. https://doi.org/10.1016/S0016-5107(97)70237-2
  2. Kondo S, Isayama H, Akahane M, et al. Detection of common bile duct stones: comparison between endoscopic ultrasonography, magnetic resonance cholangiography, and helical-computed-tomographic cholangiography. Eur J Radiol 2005;54:271-275. https://doi.org/10.1016/j.ejrad.2004.07.007
  3. Mirbagheri SA, Mohamadnejad M, Nasiri J, Vahid AA, Ghadimi R, Malekzadeh R. Prospective evaluation of endoscopic ultrasonography in the diagnosis of biliary microlithiasis in patients with normal transabdominal ultrasonography. J Gastrointest Surg 2005;9:961-964. https://doi.org/10.1016/j.gassur.2005.03.002
  4. Ney MV, Maluf-Filho F, Sakai P, Zilberstein B, Gama-Rodrigues J, Rosa H. Echo-endoscopy versus endoscopic retrograde cholangiography for the diagnosis of choledocholithiasis: the influence of the size of the stone and diameter of the common bile duct. Arq Gastroenterol 2005;42:239-243. https://doi.org/10.1590/S0004-28032005000400009
  5. Mitake M, Nakazawa S, Naitoh Y, et al. Value of endoscopic ultrasonography in the detection of anomalous connections of the pancreatobiliary duct. Endoscopy 1991;23:117-120. https://doi.org/10.1055/s-2007-1010635
  6. Sugiyama M, Atomi Y. Endoscopic ultrasonography for diagnosing anomalous pancreaticobiliary junction. Gastrointest Endosc 1997;45:261-267. https://doi.org/10.1016/S0016-5107(97)70268-2
  7. Tanaka M, Fernandez-del Castillo C, Adsay V, et al. International consensus guidelines 2012 for the management of IPMN and MCN of the pancreas. Pancreatology 2012;12:183-197. https://doi.org/10.1016/j.pan.2012.04.004
  8. Katanuma A, Maguchi H, Osanai M, Takahashi K. The difference in the capability of delineation between convex and radial arrayed echoendoscope for pancreas and biliary tract; case reports from the standpoint of both convex and radial arrayed echoendoscope. Dig Endosc 2011;23 Suppl 1:2-8. https://doi.org/10.1111/j.1443-1661.2011.01131.x
  9. Hara K, Bhatia V, Hijioka S, Mizuno N, Yamao K. A convex EUS is useful to diagnose vascular invasion of cancer, especially hepatic hilus cancer. Dig Endosc 2011;23 Suppl 1:26-28. https://doi.org/10.1111/j.1443-1661.2011.01137.x
  10. Kaneko M, Katanuma A, Maguchi H, et al. Prospective, randomized, comparative study of delineation capability of radial scanning and curved linear array endoscopic ultrasound for the pancreaticobiliary region. Endosc Int Open 2014;2:E160-E170. https://doi.org/10.1055/s-0034-1377384
  11. Ito K, Fujita N, Noda Y, et al. Preoperative evaluation of ampullary neoplasm with EUS and transpapillary intraductal US: a prospective and histopathologically controlled study. Gastrointest Endosc 2007;66:740-747. https://doi.org/10.1016/j.gie.2007.03.1081

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