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Transcanalicular Diode Laser-assisted Dacryocystorhinostomy for the Treatment of Primary Acquired Nasolacrimal Duct Obstruction
Published on: October 13, 2017
Prognostic value of metal-metal contact during nasolacrimal duct probing
Mehmet C Mocan1, Duygu Gulmez Sevim1, Sibel Kocabeyoglu1
1Department of Ophthalmology, Hacettepe University Faculty of Medicine, Ankara, Turkey.
Insights
Metal-metal contact during nasolacrimal duct probing is a strong predictor of surgical success for congenital NLD obstructions. Achieving this contact significantly improves outcomes in both simple membranous and complex cases.
Area of Science:
- Ophthalmology
- Pediatric Surgery
- Medical Devices
Background:
- Congenital nasolacrimal duct obstruction (CNLDO) is common in infants.
- Differentiating between simple membranous and complex CNLDO is crucial for treatment planning.
- Nasolacrimal duct probing is a standard surgical intervention.
Purpose of the Study:
- To assess the prognostic significance of metal-metal contact during nasolacrimal duct (NLD) probing.
- To compare outcomes in simple membranous versus complex CNLDO.
- To identify predictors of successful NLD probing outcomes.
Main Methods:
- Retrospective case series of 70 infants (79 eyes) with CNLDO.
- Classification of obstructions into simple membranous and complex types.
- Documentation of metal-metal contact during NLD probing and assessment of surgical success.
Main Results:
- Overall probing success rate was 84.9%.
- Higher success rates were observed in membranous (89.7%) versus complex (54.5%) obstructions.
- Metal-metal contact was achieved in 78.5% of eyes, with a significantly higher success rate (93.5%) compared to cases without contact (52.9%).
- Metal-metal touch (OR 13.3) and membranous obstruction (OR 7.7) were significant predictors of success.
Conclusions:
- Establishing metal-metal contact during NLD probing is a key indicator of successful surgical outcomes.
- This prognostic sign is valuable for both membranous and complex types of CNLDO.
- The findings support the importance of technique in optimizing NLD probing success.
Objective:
To evaluate the prognostic value of metal-metal contact during nasolacrimal duct (NLD) probing in patients with simple membranous versus complex congenital NLD obstructions (CNLDO).
Design:
Retrospective case series.
Participants:
Infants diagnosed with CNLDO.
Methods:
Seventy-nine eyes of 70 infants with CNLDO who underwent probing were recruited. Metal-metal contact was sought during probing in every patient. CNLDO was classified into simple membranous versus complex type of obstruction. Complete resolution of epiphora, increased tear meniscus, and mucous discharge were defined as successful outcome.
Results:
The mean age of patients at the time of probing was 21.0 ± 8.3 (range 1-42) months. Postoperative evaluations were performed in all patients between the first and second postoperative months. Overall success rate of probing was 84.9%. A higher success rate was obtained in membranous (89.7%) versus complex (54.5%) obstructions (p = 0.01). A metal-metal contact could be established in 62 (78.5%) eyes. Treatment success was achieved in 93.5% of cases in which metal-metal contact was detected versus 52.9% of cases without metal-metal contact (p < 0.001). Among cases with metal-metal contact, a trend toward successful outcomes was observed with membranous as compared with complex obstructions (96.4% vs 71.4%, p = 0.059). Logistic regression analysis revealed the presence of metal-metal touch (odds ratio [OR] 13.3, p = 0.001) and membranous type obstruction (OR 7.7, p = 0.019) as significant factors for a successful outcome.
Conclusions:
Establishment of metal-metal contact is an important prognostic sign for surgical success in both the membranous and the complex type of CNLDO.
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