title: Single-operator double-balloon endoscopy (DBE) is as effective as dual-operator DBE.
abstract: OBJECTIVE
  Double-balloon endoscopy (DBE) is a new device that allows diagnosis and treatment throughout the entire small intestine. Although the originally described method requires two operators, we have recently developed a method to perform DBE by a single operator. We here assessed the clinical usefulness of this one-person method in comparison to the conventional two-person DBE.
  
  
  METHODS
  One hundred sixty-two patients (102 men and 60 women, mean age 59 years) underwent 303 DBE procedures. Total observation time, completion rate of total intestinal and colonic observation, lesion-discovery rate, and complication rate were retrospectively compared between the one-person method and the conventional two-person method of DBE. The one-person method consists of the Grip and Pinch technique and Keep (or Hold) and Slide technique.
  
  
  RESULTS
  The total observation times were 95.5 +/- 35.1 min and 96.7 +/- 47.5 min by one-person and two-person antegrade DBE, respectively, and 103 +/- 29.8 min and 111 +/- 30.1 min by one-person and two-person retrograde DBE, respectively. The completion rate for examination of the entire small intestine was 74.2% in one-person DBE and 76.5% in two-person DBE, respectively. The lesion-discovery rate was 69.0% in one-person DBE and 65.5% in two-person DBE, respectively. No significant differences between two methods were found in all measures. Also, no difference was observed in complication rate of the two methods.
  
  
  CONCLUSIONS
  The single-operator method for DBE was as efficient as the dual-operator DBE without any higher risk of complications and, therefore, could replace the conventional dual-operator method in the future.
authors.affiliation: Department of Gastroenterology and Hepatology, Graduate School of Medicine, Tokyo Medical and Dental University, Tokyo, Japan.
authors.forename: Akihiro
authors.initials: A
authors.lastname: Araki
authors.forename: Kiichiro
authors.initials: K
authors.lastname: Tsuchiya
authors.forename: Eriko
authors.initials: E
authors.lastname: Okada
authors.forename: Shinji
authors.initials: S
authors.lastname: Suzuki
authors.forename: Shigeru
authors.initials: S
authors.lastname: Oshima
authors.forename: Sanae
authors.initials: S
authors.lastname: Yoshioka
authors.forename: Atsushi
authors.initials: A
authors.lastname: Yoshioka
authors.forename: Takanori
authors.initials: T
authors.lastname: Kanai
authors.forename: Mamoru
authors.initials: M
authors.lastname: Watanabe
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002404:Catheterization / Q000295:instrumentation; D002983:Clinical Competence; D003113:Colonoscopy / Q000009:adverse effects; D016145:Endoscopy, Digestive System / Q000009:adverse effects / Q000295:instrumentation / Q000379:methods*; D005260:Female; D006489:Hemostatic Techniques / Q000009:adverse effects / Q000295:instrumentation; D006801:Humans; D007410:Intestinal Diseases / Q000473:pathology* / Q000628:therapy*; D007421:Intestine, Small / Q000473:pathology*; D008297:Male; D008875:Middle Aged; D009048:Motor Skills; D011237:Predictive Value of Tests; D012189:Retrospective Studies; D013997:Time Factors; D016896:Treatment Outcome; D055815:Young Adult