title: Comparison of videofluoroscopy and impedance planimetry for the evaluation of oesophageal stenosis: a retrospective study.
abstract: OBJECTIVE
  To compare videofluoroscopy that included a tablet test with impedance planimetry (EndoFLIP®) for the evaluation of oesophageal stenosis in patients with dysphagia.
  
  
  METHODS
  In 56 patients, videofluoroscopic examinations following the transit of a 14-mm tablet were retrospectively reviewed and correlated with impedance planimetry findings, a catheter-based method using impedance planimetry to display the oesophageal diameter estimates. Additional findings assessed were the occurrence of symptoms during tablet passage and evaluation of oesophageal motility.
  
  
  RESULTS
  Impaction of the tablet occurred in 31/56 patients; nine showed a moderate delay (2-15 s), three a short delay (<2 s) and 13 no delay of tablet passage. Both methods showed a significant correlation between tablet impaction and oesophageal diameter <15.1 mm, as measured by impedance planimetry (p = 0.035). The feeling of the tablet getting stuck was reported by seven patients, six showing impaction of the tablet (four with an EndoFLIP-diameter < 13 mm, two with a diameter of 13-19 mm) and one showing delayed passage (EndoFLIP diameter of 17 mm).
  
  
  CONCLUSIONS
  Videofluoroscopy and impedance planimetry correlate significantly regarding tablet impaction and residual oesophageal lumen. A standardized 14-mm tablet is helpful in demonstrating oesophageal strictures in dysphagic patients. Triggering of subjective symptoms provides valuable information during a videofluoroscopic study.
  
  
  CONCLUSIONS
  • A 14-mm tablet can demonstrate oesophagogastric junction narrowing in patients with dysphagia. • Type of passage of a tablet enables estimation of oesophageal luminal diameter. • Videofluoroscopy and impedance planimetry correlate significantly regarding tablet impaction and residual oesophageal lumen.
authors.affiliation: Department of Biomedical Imaging and Image-guided Therapy, Medical University of Vienna, Waehringer Guertel 18-20, 1090, Vienna, Austria. martina.scharitzer@meduniwien.ac.at.
authors.forename: Martina
authors.identifier: http://orcid.org/0000-0003-4427-5463
authors.initials: M
authors.lastname: Scharitzer
authors.affiliation: Department of Visceral Surgery and Medicine, University Hospital Bern, Bern, Switzerland.|Department of Surgery, Medical University of Vienna, Vienna, Austria.
authors.forename: Johannes
authors.initials: J
authors.lastname: Lenglinger
authors.affiliation: Department of Diagnostic and Interventional Radiology, KH Goettlicher Heiland, KH der Barmherzigen Schwestern, St. Josef-KH, Vienna, Austria.
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Schima
authors.affiliation: Department of Biomedical Imaging and Image-guided Therapy, Medical University of Vienna, Waehringer Guertel 18-20, 1090, Vienna, Austria.
authors.forename: Michael
authors.initials: M
authors.lastname: Weber
authors.affiliation: Department of Surgery, Medical University of Vienna, Vienna, Austria.
authors.forename: Claudia
authors.initials: C
authors.lastname: Ringhofer
authors.affiliation: Unified Patient Division, Teaching Center, Medical University of Vienna, Vienna, Austria.
authors.forename: Peter
authors.initials: P
authors.lastname: Pokieser
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D003680:Deglutition Disorders / Q000209:etiology; D017097:Electric Impedance; D004940:Esophageal Stenosis / Q000150:complications / Q000175:diagnosis* / Q000473:pathology; D004943:Esophagogastric Junction / Q000473:pathology; D005260:Female; D005471:Fluoroscopy / Q000379:methods; D006801:Humans; D008297:Male; D008365:Manometry / Q000379:methods; D008875:Middle Aged; D012189:Retrospective Studies; D013607:Tablets; D014741:Video Recording / Q000379:methods; D055815:Young Adult
chemical_list: D013607:Tablets
keywords: Cineradiography; Deglutition disorders; Impedance planimetry; Oesophageal stenosis; Tablets