title: Initial experience with catheter probe US when using a multibending endoscope.
abstract: BACKGROUND
  High-frequency catheter probe US provides detailed images when the scanning plane is perpendicular to the area of interest and the latter is within the focal zone. A multibending endoscope has been developed that has two bending sections that can be deflected independently. The aim of this study was to determine whether this new endoscope enhances high-frequency catheter probe US.
  
  
  METHODS
  High-frequency catheter probe US was performed with the multibending endoscope in 33 patients with upper-GI lesions. The endoscope was carefully maneuvered until the scanning plane was perpendicular to the area of interest and the target area was within the focal zone of the probe. The effects of deflecting the second bending section on the image and on the rotating elements in the probe were evaluated.
  
  
  RESULTS
  For 28 lesions, no improvement was observed with use of both bending sections. However, for 5 lesions, the US image was improved by use of the second bending section. These lesions were located in the stomach on the lesser or greater curve. In no instance did deflection of both bending sections result in uneven rotation of the mechanical elements in the probe.
  
  
  CONCLUSIONS
  For certain lesions, US images obtained with a catheter probe can be improved by using an endoscope with a second bending section.
authors.affiliation: Department of Endoscopy, Hiroshima University Hospital, Hiroshima, Japan.
authors.forename: Shigeto
authors.initials: S
authors.lastname: Yoshida
authors.forename: Shinji
authors.initials: S
authors.lastname: Tanaka
authors.forename: Daisuke
authors.initials: D
authors.lastname: Kamino
authors.forename: Madoka
authors.initials: M
authors.lastname: Nakao
authors.forename: Shiro
authors.initials: S
authors.lastname: Oka
authors.forename: Yasuhiko
authors.initials: Y
authors.lastname: Kitadai
authors.forename: Norihiko
authors.initials: N
authors.lastname: Hayakawa
authors.forename: Ken
authors.initials: K
authors.lastname: Haruma
authors.forename: Kazuaki
authors.initials: K
authors.lastname: Chayama
mesh_terms: D002404:Catheterization; D019723:Endoscopes; D019160:Endosonography / Q000295:instrumentation*; D004867:Equipment Design; D004947:Esophagus / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D008297:Male; D013270:Stomach / Q000000981:diagnostic imaging*