title: [High-frequency ultrasonography applied to disorders of the lacrimal canaliculi (Part 2)].
abstract: BACKGROUND
  Thirty patients presenting disorders of the lacrimal passages were examined using high-frequency ultrasonography in the hopes that this diagnostic tool would provide better image resolution and better reproduction quality than conventional 8- to 10-MHz ultrasound examination.
  
  
  METHODS
  To carry out this examination, we were able to combine a 20-MHz ultrasound probe to the I3 ultrasound diagnostic device. The patient was then positioned and the interior palpebral angle was filled with methylcellulose.
  
  
  RESULTS
  In all patients, we succeeded in detecting the course and diameter of the lacrimal passages with better images than those provided by conventional ultrasound. We found that chronic canaliculitis was an important clinical domain for the 20-MHz ultrasound. Diagnosis is made easily and decisive information is provided. In all patients with this disorder (n=5), widening of the lacrimal passages, development of a diverticulum, and the presence of drusen concretions were observed.
  
  
  CONCLUSIONS
  In our opinion, the use of high-frequency sonography as a noninvasive diagnostic technique is advised in cases of lacrimal passage disorders and is valuable in detecting chronic canaliculitis.
authors.affiliation: Clinique et Policlinique d'Ophtalmologie de l'Université Ernst-Moritz-Arndt de Greifswald, Rubenowstrabe 2, D-17489 Greifswald, Allemagne. Tost@mail.uni-greifswald.de
authors.forename: F
authors.initials: F
authors.lastname: Tost
authors.forename: R
authors.initials: R
authors.lastname: Bruder
authors.forename: M
authors.initials: M
authors.lastname: Ostendorf
mesh_terms: D006801:Humans; D007766:Lacrimal Apparatus Diseases / Q000000981:diagnostic imaging*; D014463:Ultrasonography / Q000379:methods