Silicone Intubation and Dacryocystographic Finding in Incomplete Nasolacrimal Duct Obstruction

Shin Cho Suh; Myung Sook Ha

doi:10.3341/jkos.2009.50.4.491

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Suh and Ha: Silicone Intubation and Dacryocystographic Finding in Incomplete Nasolacrimal Duct Obstruction

Original Article

J Korean Ophthalmol Soc 2009;50(4):491-496.

Published online: 7 September 2009

DOI: https://doi.org/10.3341/jkos.2009.50.4.491

Silicone Intubation and Dacryocystographic Finding in Incomplete Nasolacrimal Duct Obstruction

Shin Cho Suh, MD, Myung Sook Ha, MD

Department of Ophthalmology, Konyang University College of Medicine, Daejon, Korea

Address reprint requests to Myung Sook Ha, MD, Department of Ophthalmology, Konyang University Hospital #685 Gasuwon-dong, Seo-gu, Daejon 302-718, Korea Tel: 82-42-600-9258, Fax: 82-42-600-9176, E-mail: hmseye@hanmail.net

Received 9 July 2008 Accepted 30 December 2008

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Purpose

To assess the relationship between the internal diameter of the nasolacrimal duct and the success rate of silicone tube intubation in incomplete nasolacrimal duct obstruction patients with epiphora.

Methods

Dacryocystography was performed 80 patients with symptoms of epiphora and the anteroposterior (AP) diameters and the lateral diameters of the nasolacrimal ducts were measured. These measurements were compared between the group of patients who demonstrated improvement after the operation, and the group without symptom improvement.

Results

The mean length of the nasolacrimal duct in the group with nasolacrimal stenosis was 11.7±0.1 mm, the mean lateral diameter was 1.0±0.2 mm, and the mean AP diameter was 1.1±0.1 mm. The AP diameter of the symptomatic nasolacrimal duct in the group with successful postoperative results was 1.1±0.1 mm, and 0.9±0.1 mm in the group with unsuccessful results. The group with successful postoperative results had an average of 18.1±7.0% stenosis in the side of the eye with nasolacrimal duct stenosis compared with the asymptomatic side, and the group with unsuccessful postoperative results had an average of 34%±3.6% stenosis.

Conclusions

In cases with nasolacrimal duct stenosis, the success rate of silicone tube intubation was high when the AP diameter of the nasolacrimal duct was more than 1.1±0.1 mm and when the stenosis was less than 18.1±7.0% in the symptomatic side compared with the opposite side. These results are expected to help predict the success rates when preoperatively planning silicone tube intubation.

Keywords: Dacryocystography, Partial nasolacrimal duct obstruction, Silicone tube intubation

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Figure 1.

Digital subtraction dacryocystograph. (A, lateral view; B, anteroposterior view)

Table 1.

General characteristics of patients

Subject	No. of patients(%)
Sex
male	23(28.7)
female	57(71.3)
Age (years)	29∼82(mean: 58.2)
Laterality of disease
right	34(42.5)
left	46(57.5)
Period of disease (years)	0.4∼12(mean=2.3)

Table 2.

Nasolacrimal duct width and length in success group

		Normal (mm)	INLDO^*(mm)	p-value
NLD^†	anteroposterior width	1.3±0.1	1.1±0.1	<0.01
	right and left width	1.3±0.2	1.0±0.2	<0.01
	vertical length	11.9±0.5	11.7±0.8	0.09

^* INLD=incomplete nasolacrimal duct obstruction

^† NLD=nasolacrimal duct.

Table 3.

Nasolacrimal duct width and length in failure group

		Normal (mm)	INLDO^*(mm)	p-value
NLD^†	anteroposterior width	1.4±0.1	0.9±0.1	<0.01
	right and left width	1.4±0.1	1.1±0.2	<0.01
	vertical length	11.8±0.9	11.7±1.5	0.83

^* INLD=incomplete nasolacrimal duct obstruction

^† NLD=nasolacrimal duct.

Table 4.

Difference of nasolacrimal duct width and length between success and failure group

		Success (%)	Failure (%)	p-value
NLD^*	anteroposterior width	18.1±7.0	34.4±3.6	<0.01
	right and left width	23.1±3.4	28.5±4.3	0.75
	vertical length	1.6±0.2	0.8±0.1	0.85

^* NLD=nasolacrimal duct.

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