J Korean Ophthalmol Soc.
2006 Mar;47(3):343-348.
Nasolacrimal Ostium after External Dacryocystorhinostomy
- Affiliations
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- 1Department of Ophthalmology, University of Ulsan, College of Medicine, Asan Medical Center, Seoul, Korea. yongjae@amc.seoul.kr
Abstract
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PURPOSE: To evaluate the internal ostium and lacrimal sac change after external dacryocystorhinostomy (DCR) using digital subtraction dacryocystography (DCG).
METHODS
Between May 2003 and July 2004, digital subtraction DCG was performed to assess the ostium and lacrimal sac 6 months after external DCR in 48 patients (n=50 eyes).
RESULTS
The lacrimal sac had reformed in 45 (90%) eyes. Mean ostium size was 2.4 mm (0.5~6.1 mm) and these were located at the inferior part of the reformed sac in 39 eyes (78%). Patients with a fistula-type internal ostium, of which the lacrimal sac had not reformed, often complained of epiphora (p=0.005).
CONCLUSIONS
Digital subtraction DCG showed successful anatomic changes in the distal lacrimal pathway and confirmed that the internal ostium contracts into a relatively small ostium after DCR. A fistula-type internal ostium may explain the pathophysiology of functional failure after successful DCR.
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