Nasolacrimal duct obstruction classified by dacryoendoscopy and treated with inferior meatal dacryorhinotomy. Part I: Positional diagnosis of primary nasolacrimal duct obstruction with dacryoendoscope.
case_series · Level IV
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Abstract
To investigate the site of primary nasolacrimal duct obstruction (PNLDO) using a dacryoendoscope and nasal endoscope. Retrospective, observational case series. After local anesthesia, dacryoendoscopy and nasal endoscopy were performed in 149 cases (138 Japanese subjects) of PNLDO. Membranous nasolacrimal duct obstruction was termed as lower PNLDO, and occlusion at sac/duct junction termed as higher PNLDO. The incidence of lower PNLDO was 26.8% (40 of 149 cases), and 109 cases (73.2%) were diagnosed with higher PNLDO. The dacryoendoscope is extremely useful to observe directly and evaluate the site of obstruction with accuracy in PNLDO. The higher and lower PNLDO may have a different etiologies.
Medical subject headings
- Dacryocystorhinostomy
- Diagnostic Techniques, Ophthalmological
- Endoscopy
- Lacrimal Duct Obstruction
- Nasolacrimal Duct