title: [CT dacryography without selective lacrimal duct catheterization: review of 39 patients].
abstract: OBJECTIVE
  Dacryographies and CT dacryographies are usually performed after catheterization of a lacrimal canaliculus. We evaluated the quality of opacification on CT scan after simple instillation of contrast medium, without any catheterization.
  
  
  METHODS
  39 patients (78 nasolacrimal ducts) were examined for lacrimal pathways obstruction by CT scan after instillation of diluted contrast medium. Additional CT scan imaging was performed after catheterization when the first study did not provide adequate opacification.
  
  
  RESULTS
  CT dacryography after instillation is a well tolerated technique. In our study, it allowed detection of all pathologic lacrimal ducts; 7 normal lacrimal pathways (after catheterization) were not opacified after instillation (false positives). The sensitivity of the method was 100%, its specificity 84%.
  
  
  CONCLUSIONS
  CT dacryography after instillation is a physiologic, simple and sensitive method to evaluate lacrimal obstruction. We propose it as a first step, catheterization being used only in the absence of opacification after instillation.
authors.affiliation: Service de Radiologie, CHU Gabriel Montpied, BP 69, 63000 Clermont-Ferrand Cedex, France.
authors.forename: J M
authors.initials: JM
authors.lastname: Garcier
authors.forename: M
authors.initials: M
authors.lastname: Napon
authors.forename: F
authors.initials: F
authors.lastname: Chiambaretta
authors.forename: R
authors.initials: R
authors.lastname: Mofid
authors.forename: T
authors.initials: T
authors.lastname: Chahid
authors.forename: E
authors.initials: E
authors.lastname: Lipiecka
authors.forename: C
authors.initials: C
authors.lastname: Privat
authors.forename: A
authors.initials: A
authors.lastname: Ravel
authors.forename: L
authors.initials: L
authors.lastname: Boyer
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002404:Catheterization; D002648:Child; D002675:Child, Preschool; D003287:Contrast Media; D003608:Dacryocystorhinostomy; D005189:False Positive Reactions; D005260:Female; D006801:Humans; D007767:Lacrimal Duct Obstruction / Q000000981:diagnostic imaging* / Q000209:etiology; D008297:Male; D008875:Middle Aged; D018579:Patient Selection; D012680:Sensitivity and Specificity; D012727:Sex Characteristics; D017678:Sex Distribution; D014057:Tomography, X-Ray Computed / Q000379:methods* / Q000592:standards
chemical_list: D003287:Contrast Media