Journal List > J Korean Ophthalmol Soc > v.56(12) > 1010155

Lee and Lee: Results of Silicone Tube Intubation in Patients with Common Canalicular Obstruction in Dacryocystography



To evaluate the effects of silicone tube intubation in patients showing common canalicular obstruction in dacryocystography.


We conducted a retrospective chart review of 136 eyes of 93 patients who underwent silicone tube intubation and who were followed for more than 6 months. The patients were divided into 2 groups: the normal canaliculus group (112 eyes of 72 pa-tients) and the common canalicular obstruction group (24 eyes of 21 patients). The demographic characteristics, degree of naso-lacrimal duct obstruction on probing, and functional and anatomical success rates of silicone tube intubation were compared be-tween the two groups. Surgery success was noted when the patient was satisfied with the ‘improved’ tearing symptom and the tear meniscus height decreased.


On probing, 17 (70.8%) of 27 eyes revealed definite obstructive feeling at nasolacrimal duct in the common canalicular obstruction group, and there was no significant difference compared to the normal canaliculus group ( p = 0.639). The anatomical success rate of silicone tube intubation was 91.1% in the normal canaliculus group and 83.3% in the common canalicular ob-struction group, and the functional success rate was 85.7% in the normal canaliculus group and 75.0% in the common canal-icular obstruction group. There were no significant differences in success rates between the two groups ( p = 0.271, p = 0.161, re-spectively).


Silicone tube intubation can be considered as a primary treatment option for management of common canalicular obstruction.


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Figure 1.
Representative photographs of dacryocystography. (A) Normal canaliculus group. (B) Common canaliculus ob-struction group.
Table 1.
Demographic and clinical features of the patients
Normal canaliculus group (112 eyes of 72 patients) Common canalicular obstruction group (24 eyes of 21 patients) p-value
Age (years) 61.1 ± 11.1 57.5 ± 10.7 0.182
Sex (male:female) 18:54 9:12 0.172*
DM (%) 17 (23.6%) 3 (14.3%) 0.547*
HT (%) 21 (29.2%) 4 (19.0%) 0.416*
Duration of symptom (months) 39.4 ± 56.7 32.3 ± 51.9 0.615
Obstruction on NLD probing (no:mild:moderate:severe) 23:18:25:46 5:2:11:6 0.099*
Moderate to severe obstruction on NLD probing 71 (63.4%) 17 (70.8%) 0.639*
Values are presented as mean ± SD unless otherwise indicated. DM = diabetes mellitus; HT = hypertension; NLD = nasolacrimal duct.* Fisher’s exact test; Mann-Whitney U-test.
Table 2.
Results of silicone tube intubation
Normal canaliculus group (112 eyes of 72 patients) Common canalicular obstruction gro (24 eyes of 21 patients) up p-value
Anatomical success rate 102/112 (91.1%) 20/24 (83.3%) 0.271*
Functional success rate 96/112 (85.7%) 18/24 (75.0%) 0.161*
Length of follow up (months) 7.9 ± 3.4 6.6 ± 1.9 0.087
Values are presented as mean ± SD unless otherwise indicated.* Fisher’s exact test; Mann-Whitney U-test.
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