title: A comparative evaluation of single-balloon enteroscopy and spiral enteroscopy for patients with mid-gut disorders.
abstract: BACKGROUND
  Single-balloon enteroscopy (SBE) and spiral enteroscopy (SE) are recently described device-assisted techniques in endoluminal evaluation of the small bowel. No studies comparing SBE and SE in patients with suspected small-bowel disorders have previously been reported.
  
  
  OBJECTIVE
  The aims of this study were to compare SBE and SE in terms of diagnostic yield, procedure time, depth of maximal insertion, and complications.
  
  
  METHODS
  Retrospective cohort study.
  
  
  METHODS
  Tertiary-care referral center.
  
  
  METHODS
  A retrospective analysis was performed on all patients at our institution undergoing anterograde SBE or SE between 2007 and 2009. Patients with altered anatomy or prior small-bowel surgery were excluded.
  
  
  METHODS
  Deep enteroscopy.
  
  
  METHODS
  Diagnostic yield.
  
  
  RESULTS
  During the study period, 92 patients underwent 105 procedures (52 SBE, 53 SE). The most common indication for small-bowel endoscopy was obscure GI bleeding (n = 42). The diagnostic yield was not statistically different between SBE and SE (59.6% and 43.4%, respectively, P = .12). The overall diagnostic yield in patients with obscure GI bleeding was 67%. There was no significant difference between mean SBE and SE procedure times (53 minutes [range 15-99 minutes] vs 47 minutes [range 20-125 minutes], respectively; P = .2). The mean depth of maximal insertion beyond the ligament of Treitz for SE was significantly higher than that for SBE (301 cm [range 175-400 cm] vs 222 cm [range 110-400 cm], respectively; P < .001). Perforation occurred in one SBE procedure.
  
  
  CONCLUSIONS
  Retrospective design and nonstandardized gas insufflation.
  
  
  CONCLUSIONS
  This is the first report comparing SE and SBE. Although SE yielded greater depth of maximal insertion than SBE, both techniques had similar diagnostic yields and procedure times. In addition, both techniques were safe and were particularly useful in patients with obscure GI bleeding.
authors.affiliation: Department of Medicine and Division of Gastroenterology and Hepatology, The Johns Hopkins Medical Institutions, Baltimore, Maryland, USA.
authors.forename: Mouen A
authors.initials: MA
authors.lastname: Khashab
authors.forename: Anne Marie
authors.initials: AM
authors.lastname: Lennon
authors.forename: Kerry B
authors.initials: KB
authors.lastname: Dunbar
authors.forename: Vikesh K
authors.initials: VK
authors.lastname: Singh
authors.forename: Vinay
authors.initials: V
authors.lastname: Chandrasekhara
authors.forename: Samuel
authors.initials: S
authors.lastname: Giday
authors.forename: Marcia I
authors.initials: MI
authors.lastname: Canto
authors.forename: Jonathan M
authors.initials: JM
authors.lastname: Buscaglia
authors.forename: Sumit
authors.initials: S
authors.lastname: Kapoor
authors.forename: Eun Ji
authors.initials: EJ
authors.lastname: Shin
authors.forename: Anthony N
authors.initials: AN
authors.lastname: Kalloo
authors.forename: Patrick I
authors.initials: PI
authors.lastname: Okolo
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D053704:Capsule Endoscopy; D003424:Crohn Disease / Q000175:diagnosis; D016099:Endoscopy, Gastrointestinal / Q000379:methods*; D005260:Female; D006471:Gastrointestinal Hemorrhage / Q000175:diagnosis; D006801:Humans; D007410:Intestinal Diseases / Q000175:diagnosis*; D007421:Intestine, Small; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D055815:Young Adult