Probing for congenital nasolacrimal duct obstruction combined with canalicular stenosis

Abstract

Objective To evaluate the effect of probing in the treatment of congenital nasolacrimal duct obstruction combined with canalicular stenosis in children.Methods The probing,irrigating and fluorescein dye disappearance test(FDDT) were performed in 29 eyes of 27 cases with congenital nasolacrimal duct obstruction combined with canalicular stenosis (study group) and 30 eyes of 23 cases with simple nasolacrimal duct obstruction (control group),FDDT experiment and irrigation were applicated to evaluate effect of probing of lacrimal passage for nasolacrimal duct and lacrimal canalicular obstruction.Results In the study group,there were 13 cases (14 eyes) with infferior lacrimal duct and 14 cases (15 eyes) with superior the obstruction of lacrimal canaliculus,The nasolacrimal duct obstruction was patent in 26 eyes (89.7％) from study group and 27 eyes(90.0％) in control group,There were no statistical difference between the two groups.x2 =0.002,P =0.965 (＞ 0.05),In the study group,the canalicular stenosis was cleared in 11eyes(37.9％) compared with the control group,FDDT in the study group was lower at level 0,higher at level 1 ～2,x2 =7.096,P =0.029.The superior canaliculus was blocked in 11 eyes (4 eyes with FDDT level 0,6 eyes with FDDT level 1,1 eye with FDDT level 2),and the lower canaliculus was blocked in 11 eyes (1 eye with FDDT level 0,3 eyes with FDDT level 1,2 eyes with FDDT level 2) in 17 cases with patent nasolacrimal duct and blocked canaliculus.Conclusion Probing can first be effectively used in therapeutic applications in congenital nasolacrimal duct obstruction with lacrimal canaliculus obstruction in children,if there is one normal lacrimal canaliculus.The therapeutic effect is better in patient with simple nasolacrimal duct obstruction than in that combined with canalicular stenosis,and the superior or lower canaliculus candrainage tear effectively. Key words: Probing, duct, nasolacrimal; Obstruction, congenital, nasolacrimal duct; Stenosis,canaliculus, lacrimal