title: Comparison of the main oesophageal pathophysiological characteristics between short- and long-segment Barrett's oesophagus.
abstract: OBJECTIVE
  To assess the oesophageal manometric characteristics and 24-h pH profiles of patients with both short-segment and long-segment Barrett's oesophagus and compare them with those of patients with reflux oesophagitis and controls.
  
  
  METHODS
  Seventy-nine patients who had undergone upper digestive endoscopy were recruited: 16 had short-segment Barrett's oesophagus, 13 had long-segment Barrett's oesophagus, 25 had grade III oesophagitis according to the Savary-Miller classification and 25 were used as controls. The diagnosis of Barrett's oesophagus was based on the histological detection of specialized intestinal metaplasia, which extended < 3 cm into the oesophagus in patients with short-segment disease and > 3 cm in patients with long-segment disease. All subjects underwent oesophageal manometry and basal 24-h oesophageal pH monitoring.
  
  
  RESULTS
  The lower oesophageal sphincter pressure was significantly lower in patients with reflux oesophagitis and short-segment and long-segment Barrett's oesophagus than in controls (P=0.0004-0.0001), but there was no difference among the three reflux groups. The peristaltic wave amplitude of patients with long-segment Barrett's oesophagus was significantly lower than that of controls (P=0.002) and patients with short-segment Barrett's oesophagus (P=0.02), but was no different from that of patients with reflux oesophagitis. The percentage of non-propagated wet swallows was significantly higher in patients with reflux oesophagitis and short-segment and long-segment Barrett's oesophagus when compared with that of controls (P=0.0004-0.0001). The total percentage of time the oesophagus was exposed to pH < 4.0 was significantly higher in patients with reflux oesophagitis and short-segment and long-segment Barrett's oesophagus (P=0.0001) than in controls, and was higher in patients with long-segment disease than in those with short-segment disease (P=0.01).
  
  
  CONCLUSIONS
  Long-segment Barrett's oesophagus is characterized by a greater impairment of peristaltic wave amplitude and a higher oesophageal acid exposure than is short-segment Barrett's oesophagus. However, both forms are linked to increased acid reflux.
authors.affiliation: Dipartimento di Medicina Interna e Specialità Mediche, Università di Genova, Genova, Italy.
authors.forename: P
authors.initials: P
authors.lastname: Zentilin
authors.forename: M
authors.initials: M
authors.lastname: Conio
authors.forename: M R
authors.initials: MR
authors.lastname: Mele
authors.forename: C
authors.initials: C
authors.lastname: Mansi
authors.forename: N
authors.initials: N
authors.lastname: Pandolfo
authors.forename: P
authors.initials: P
authors.lastname: Dulbecco
authors.forename: C
authors.initials: C
authors.lastname: Gambaro
authors.forename: L
authors.initials: L
authors.lastname: Tessieri
authors.forename: E
authors.initials: E
authors.lastname: Iiritano
authors.forename: C
authors.initials: C
authors.lastname: Bilardi
authors.forename: R
authors.initials: R
authors.lastname: Biagini
authors.forename: S
authors.initials: S
authors.lastname: Vigneri
authors.forename: V
authors.initials: V
authors.lastname: Savarino
mesh_terms: D000328:Adult; D000368:Aged; D001471:Barrett Esophagus / Q000503:physiopathology*; D016022:Case-Control Studies; D005260:Female; D005764:Gastroesophageal Reflux / Q000503:physiopathology*; D006801:Humans; D008297:Male; D008365:Manometry; D008875:Middle Aged