Dr.Santanu Mitra, S03757
Purpose: To evaluate the anatomical and physiological success of DCR, performed through external (E DCR) and laser assisted transcanalicular approaches (TC DCR) with FTT.
Methods: Retrospective consecutive 396 DCR cases evaluated at 6 weeks postoperatively with zero-degree rigid nasal endoscope. The time of the dye first noted at the internal ostium after instilling it in the conjunctival fornix was recorded with a stop-watch. Subjective evaluation was based on symptoms of watering. Anatomical patency was tested with syringing.
Results: Anatomical block was found in 6.81%. But failure rate increased to 18.43% when subjectively symptomatic patients were included. Delayed FTT (>100 sec) indicated more symptomatic patients. FTT was significantly faster in E DCR group (p value < .001). Conclusion: FTT of 40 secs or less indicates a functionally symptom free DCR surgical outcome.
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