title: [Differences between Chicago and traditional classifications in the diagnosis of esophageal motor disorders with high-resolution manometry and topography of esophageal pressure].
abstract: BACKGROUND
  With the introduction of high resolution manometry (HRM) and esophageal topography a novel classification (Chicago Classification) has been proposed for the diagnosis of esophageal motor disorders (EMD). Clinical differences with the traditional classification are currently under evaluation.
  
  
  OBJECTIVE
  To investigate differences between the Chicago (CC) and traditional (TC) classifications in the diagnosis of EMD.
  
  
  METHODS
  Consecutive patients with indication for esophageal manometry were studied. HRM was performed with a 36 sensors solid-state catheter and Manoview software (V2.0).Conventional manometric tracings were analyzed by an investigator blinded to the results of HRM. Diagnosis by CC and CT were compared.
  
  
  RESULTS
  Two hundred patients were studied, 106 (53%) of them women (53%) with a mean patient age of 43.4 (range 16 - 84) years. Preoperative evaluation for GERD 152 (76%) was the most frequent indication. Achalasia (8), scleroderma (2) and peristaltic dysfunction (60 vs. 59) were similarly diagnosed by CC and CT. Spastic disorders were more frequently identified by CC: nutcracker esophagus (NC) in 3, spastic NC in3 and segmental NC in 11 patients versus TC: NC 5. Three patients had spasm with CC and 1 with TC. Non specific motor disorder was diagnosed by TC and 2 patients had functional obstruction with CC. Hypotensive lower esophageal sphincter was identified in 63 patients with CC vs.57 with TC.
  
  
  CONCLUSIONS
  Spastic disorders and functional obstruction were the EMD better identified by HRM and CC.
authors.affiliation: Clínica de Fisiología Digestiva, Hospital Ángeles del Pedregal, México, D.F. aaananbr571@gmail.com
authors.forename: A T
authors.initials: AT
authors.lastname: Abreu-Y Abreu
authors.forename: C B
authors.initials: CB
authors.lastname: González Sánchez
authors.forename: E
authors.initials: E
authors.lastname: Villanueva Sáenz
authors.forename: M A
authors.initials: MA
authors.lastname: Valdovinos Díaz
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D015154:Esophageal Motility Disorders / Q000145:classification* / Q000175:diagnosis* / Q000503:physiopathology; D005260:Female; D006801:Humans; D008297:Male; D008365:Manometry / Q000379:methods; D008875:Middle Aged; D011312:Pressure; D055815:Young Adult