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  • Title: Ritleng intubation system for treatment of congenital nasolacrimal duct obstruction.
    Author: Pe MR, Langford JD, Linberg JV, Schwartz TL, Sondhi N.
    Journal: Arch Ophthalmol; 1998 Mar; 116(3):387-91. PubMed ID: 9514499.
    Abstract:
    Twenty-eight patients (34 eyes) with congenital nasolacrimal duct obstruction underwent silicone intubation with the Ritleng lacrimal intubation system. The technique involves introduction of a Prolene (Ethicon Inc, Somerville, NJ) monofilament guide thread, securely fastened to the silicone tubing, into a tubular metal probe that opens into the inferior meatus. The outcome was evaluated in terms of ease of intubation and objective success rate. Thirty-two (94%) of the 34 lacrimal systems were successfully intubated with the Ritleng system. Difficulty passing the Prolene thread through the probe and out the tip, necessitating conversion to a Crawford intubation system, was encountered in only 2 eyes (6%). The Prolene spontaneously emerged from the nose in 24 (75%) of 32 eyes, making retrieval simple and uncomplicated. The success rate for relieving signs and symptoms of obstruction was 97% (31/32) for the eyes with the Ritleng system and 100% (2/2) for the eyes with the Crawford system. Bicanalicular silicone intubation with the Ritleng intubation system is an easy and effective technique for treatment of congenital nasolacrimal duct obstruction.
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