Journal List > J Korean Ophthalmol Soc > v.49(8) > 1008037

Suk and Kim: Long-term Outcome of Nasolacrimal Duct Obstruction Treated with Nasolacrimal Polyurethane Stents (Song's Stent)

Abstract

Purpose

This study was carried out to evaluate and investigate the long-term outcome of placement of 25 plastic nasolacrimal stents (Song's stents) without fluoroscopic guidance for the treatment of obstructed nasolacrimal ducts.

Methods

The medical records of 25 patients who had had Song’s polyurethane stents placed between 1997 and 2003 were reviewed. The patients included 17 women and 8 men who ranged in age from 22 to 79 years (mean, 57.9 years). The mean follow-up period was 54 months.

Results

The overall technical success in this study was 92% (23 of 25 eyes), with a 91% (21 of 23 eyes) short-term success rate. Of the 21 stents deployed, at the end of this study, 20 stents (95%) had been occluded. The median duration of stent patency was 38 months. The interquartile range of stent patency (75%∼25%) were 26 and 50 months, respectively.

Conclusions

Although nasolacrimal stenting with Song's stents is a relatively simple and safe procedure and is a useful alternative in elderly patients or patients in poor general condition, nasolacrimal stenting with Song’s stents does not meet the requirement of long-term efficacy for epiphora resolution.

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Figure 1.
Song's nasolacrimal duct stent set. a. Ball guide wire (W); b. Stent kit=Teflon sheath (T), Lacrimal stent (L), Pusher catheter (P); c. Lacrimal hook (H)
jkos-49-1209f1.tif
Figure 2.
Kaplan-Meier curve shows the cumulative stent patency rate. (median, 38 months; interquartile range, 26∼50 months)
jkos-49-1209f2.tif
Figure 3.
Brownish precipitates in polyurethane nasolacrimal stent lumen are shown.
jkos-49-1209f3.tif
Table 1.
Data for 25 patients with nasolacrimal obstruction
Age/Sex Symptom duration Cause Technical success* Short-term success Follow-up (mo) Duration of stent patency (mo)
74/M 15 y idiopathic yes yes 28 25
67/F 5 y idiopathic yes yes 19 15
48/M 7 y trauma yes no - -
74/F 10 y idiopathic yes yes 50 38
78/F 21 y idiopathic yes yes 40 39
54/F 4 y idiopathic yes yes 28 26
64/F 7 y idiopathic yes yes 46 40
62/F 5 y idiopathic yes yes 60 50
57/M 3 y idiopathic yes yes 68 67
44/F 14 y idiopathic no - - -
52/M 3 y idiopathic yes yes 47 34
79/F 2 y idiopathic yes yes 37 35
28/F 8 mo idiopathic yes no - -
60/M 9 y idiopathic yes yes 39 38
60/F 1 y trauma yes yes 29 23
23/F 10 y idiopathic yes yes 69 61
44/F 5 y idiopathic yes yes 36 26
59/F 5 y idiopathic yes yes 81 80
62/M 12 y idiopathic yes yes 64 59
62/M 12 y idiopathic yes yes 42 40
45/F 1 y idiopathic yes yes 33 30
67/F 3 y idiopathic yes yes 19 18
68/M 7 y idiopathic yes yes 57 55
58/F 4 y idiopathic yes yes 29 26
22/F 6 mo trauma no - - -

* Technical success=Grade 0-1 on Munk’s scale for initial 1 week;

Short-term success=Grade 0-1 on Munk's scale for 6 months.

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